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Journal articles on the topic 'Regenerativ energy'
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1
Kim, Sang-Soo, and Yohji Okada. "Variable Resistance Type Energy Regenerative Damper Using Pulse Width Modulated Step-up Chopper." Journal of Vibration and Acoustics 124, no. 1 (July 1, 2001): 110–15. http://dx.doi.org/10.1115/1.1419204.
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This paper describes a new technique for improving the damping property and efficiency of an energy regenerative damper. It is intended for a linear DC motor type vibration damper to regenerate vibration energy efficiently. Normally a regenerative damper can regenerate vibration energy only at high speed motion. For low speed motion, the damper has nonlinear characteristics with dead zone and cannot regenerate energy. In order to overcome this problem, a step-up chopper is introduced between the actuator and the charging circuit. The energy is regenerated from low speed and low voltage actuator to high voltage charging circuit. This paper also proposes a new control technique to the step-up chopper by using pulse width modulated signals. The damper can change its damping coefficient and the energy can be regenerated more efficiently. The proposed damper is applied to an active mass damper system. A simple experimental setup is used to validate the proposed technique. The results show an increase in performance and energy regeneration as compared to the previously proposed regenerative damper.
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Seth, B., and W. C. Flowers. "Generalized Actuator Concept for the Study of the Efficiency of Energetic Systems." Journal of Dynamic Systems, Measurement, and Control 112, no. 2 (June 1, 1990): 233–38. http://dx.doi.org/10.1115/1.2896130.
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Energy efficiency is an important consideration for the success of many portable as well as other energetic systems. One way to improve the efficiency of an engineering system is through regeneration. A regenerative actuator returns some of the otherwise dissipated energy required for passive operation. A regenerative actuator can plow back part of energy normally lost in the passive operation of the actuator into useful energy. The amount of regenerated energy will depend on the dissipation characteristics of the actuator and the regenerative potential of the process itself. In order to analyze regeneration a bond graph model of a generalized regenerative actuator is developed. The regenerative potential is analyzed in the power phase plane trajectory. By superimposing such a trajectory with the dissipation characteristics of the actuator, a framework is developed to study the feasibility of regeneration. A possible way of optimizing the regenerated energy is also considered in some depth.
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He, San, Xiaozhuo Zhang, Xingyu Xia, Chuanjun Wang, and Sulin Xiang. "Low energy consumption electrically regenerated ion-exchange for water desalination." Water Science and Technology 82, no. 8 (September 17, 2020): 1710–19. http://dx.doi.org/10.2166/wst.2020.442.
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Abstract A new regeneration method of ion exchange resin named Adjacent Bed Electrically Regenerated Ion-exchange (ABERI) was proposed to eliminate the environmental impact of traditional chemical regeneration and improve the economy of replacing chemical regeneration with electrical regeneration. The desalting operation of ABERI was the same as the conventional mixed bed. When the resins were exhausted, anion and cation resins were separated and then packed in a dedicated regenerator adjacently. The resins were regenerated by the H+ and OH− ions produced from a pair of electrodes installed on both sides of the resin bed. By optimizing the regeneration time, current, and feed water flow rate, the energy consumption of ABERI was 0.38 kWh/m3 water; that is, 54% of that of another electrical regeneration technology, membrane-free electrodeionization (MFEDI). Compared with MFEDI, the quality and quantity of purified water produced after regeneration were improved. In ABERI, the average conductivity and the volume (times of bed volumes) of the purified water are 0.9 μS/cm and 109; that is, 75 and 133% of that of MFEDI, respectively. The preliminary economic analysis showed that ABERI offers the potential to regenerate ion exchange resin in an eco-friendly and cost-effective manner.
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Yu, Ying Xiao, and Kyoung Kwan Ahn. "Application of Hydraulic Transformer on Energy Saving for Boom System of Hybrid Hydraulic Excavator." Applied Mechanics and Materials 868 (July 2017): 118–23. http://dx.doi.org/10.4028/www.scientific.net/amm.868.118.
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Facing the energy crisis and environmental problems, saving energy of construction machinery, especially in the hydraulic excavator is very important. Regeneration of the potential energy is an effective solution to save energy. However, the conventional hybrid excavator can’t regenerate the potential energy. This paper proposes a new structure of boom system of hydraulic excavator as well as a control strategy. The focus of the paper is using hydraulic transformer to regenerate energy and reusing the regenerated energy. The simulation is carried out by the AMESim software. From the simulation results, this new system has a high efficiency for energy saving.
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Monarkin, Nikolay, Anton Sinitsyn, Mikhail Pavlov, and Timur Akhmetov. "The influence of main parameters of regenerative heat exchanger on its energy efficiency." E3S Web of Conferences 178 (2020): 01024. http://dx.doi.org/10.1051/e3sconf/202017801024.
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The influence of various parameters of stationary switching regenerative heat exchangers used for ventilation on its thermal efficiency was studied. Considered are the geometric (length, diameter and wall thickness of a single equivalent nozzle channel), thermophysical (density and heat capacity of the nozzle material) and operation (air flow through the regenerator and the time of one stage of accumulation/regeneration of thermal energy) parameters.
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Zhou, Bing, Panpan Yu, Mei-Yao Lin, Tao Sun, Yanmin Chen, and Zu-Hang Sheng. "Facilitation of axon regeneration by enhancing mitochondrial transport and rescuing energy deficits." Journal of Cell Biology 214, no. 1 (June 7, 2016): 103–19. http://dx.doi.org/10.1083/jcb.201605101.
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Although neuronal regeneration is a highly energy-demanding process, axonal mitochondrial transport progressively declines with maturation. Mature neurons typically fail to regenerate after injury, thus raising a fundamental question as to whether mitochondrial transport is necessary to meet enhanced metabolic requirements during regeneration. Here, we reveal that reduced mitochondrial motility and energy deficits in injured axons are intrinsic mechanisms controlling regrowth in mature neurons. Axotomy induces acute mitochondrial depolarization and ATP depletion in injured axons. Thus, mature neuron-associated increases in mitochondria-anchoring protein syntaphilin (SNPH) and decreases in mitochondrial transport cause local energy deficits. Strikingly, enhancing mitochondrial transport via genetic manipulation facilitates regenerative capacity by replenishing healthy mitochondria in injured axons, thereby rescuing energy deficits. An in vivo sciatic nerve crush study further shows that enhanced mitochondrial transport in snph knockout mice accelerates axon regeneration. Understanding deficits in mitochondrial trafficking and energy supply in injured axons of mature neurons benefits development of new strategies to stimulate axon regeneration.
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Wong, Ronnie Joseph, and James Andrew Smith. "Regenerative effects in the Sit-to-Stand and Stand-to-Sit movement." Robotica 33, no. 1 (January 31, 2014): 107–26. http://dx.doi.org/10.1017/s026357471400006x.
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SUMMARYWhile Sit-to-Stand and Stand-to-Sit are routine activities and are crucial pre-requisites to walking and running their underlying dynamics are poorly understood. Furthermore, the potential for using these movements to regenerate energy in energy-sensitive devices such as orthoses, prostheses and humanoid robots has never been examined. Insights in this domain can lead to more energy-efficient prosthesis, orthosis and humanoid robot designs.OBJECTIVES: The objectives are two-fold: first, to determine how much energy can be regenerated during standard movements related to transitions between sitting and standing on a scale humanoid model and second, to determine if the chosen actuator could produce better results if the gear ratio were modified. This manuscript's main contribution to the literature is by showing which joint provides the most regenerative effect during transitions between sitting and standing.MODEL DESIGN AND IMPLEMENTATION: Joint trajectories from existing biomechanics trials of sitting and standing transitions were fed into a 1/10 scale model of a humanoid robot. The robot model, developed in MapleSim, is comprised of standard and off-the-shelf subcomponents, including amplifier, NiMH battery and Robotis Dynamixel RX-28 actuators.RESULTS: Using the RX-28 actuator, the ankle, knee and hip joints all show a degree of regenerative effects, the hip demonstrates the most dramatic levels during the transition from standing to sitting. This contrasts with recent publications which show that the knee has the most important regenerative effects during walking and running. It is also found that for under 3 degree trajectory error the regenerative effect is best for all joints when the gear ratio is increased from the RX-28's 193:1 value to a value of approximately 760:1 for the ankle, 630:1 for the knee and 600:1 for the hip.CONCLUSIONS: During transitions between sitting and standing the greatest potential for regeneration occurs in the hips. Therefore, systems designed to implement regenerative effects between sitting and standing need to include subsystems at the hip for maximum regenerative effects.
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Zhang, Yue, Congjie Ou, Bihong Lin, and Jincan Chen. "The Regenerative Criteria of an Irreversible Brayton Heat Engine and its General Optimum Performance Characteristics." Journal of Energy Resources Technology 128, no. 3 (October 22, 2005): 216–22. http://dx.doi.org/10.1115/1.2213272.
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An irreversible cycle model of the Brayton heat engine is established, in which the irreversibilities resulting from the internal dissipation of the working substance in the adiabatic compression and expansion processes and the finite-rate heat transfer in the regenerative and constant-pressure processes are taken into account. The power output and efficiency of the cycle are expressed as functions of temperatures of the working substance and the heat sources, heat transfer coefficients, pressure ratio, regenerator effectiveness, and total heat transfer area including the heat transfer areas of the regenerator and other heat exchangers. The regenerative criteria are given. The power output is optimized for a given efficiency. The general optimal performance characteristics of the cycle are revealed. The optimal performance of the Brayton heat engines with and without regeneration is compared quantitatively. The advantages of using the regenerator are expounded. Some important parameters of an irreversible regenerative Brayton heat engine, such as the temperatures of the working substance at different states, pressure ratio, maximum value of the pressure ratio, regenerator effectiveness and ratios of the various heat transfer areas to the total heat transfer area of the cycle, are further optimized. The optimal relations between these parameters and the efficiency of the cycle are presented by a set of characteristic curves for some assumed compression and expansion efficiencies. The results obtained may be helpful to the comprehensive understanding of the optimal performance of the Brayton heat engines with and without regeneration and play a theoretical instructive role for the optimal design of a regenerative Brayton heat engine.
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Yang, Xiaofeng, Wentao Zhao, Yanling Liu, Long Chen, and Xiangpeng Meng. "Design and experimental study of the energy-regenerative circuit of a hybrid vehicle suspension." Science Progress 103, no. 1 (September 16, 2019): 003685041987499. http://dx.doi.org/10.1177/0036850419874999.
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This article concerns a hybrid vehicle suspension system that can regenerate energy from vibrations. To further improve the performance of the hybrid vehicle suspension system, the design of the energy-regenerative circuit is investigated. First, the force tests of the linear motor used in the hybrid vehicle suspension were carried out, and the key parameters of the linear motor were obtained. Then, the selection procedures of the protective resistance, inductance, and initial terminal voltage of the super capacitor were discussed. These aforementioned parameters’ values were determined by considering the impact of the hybrid suspension on the dynamic performance indexes and the energy-regenerative efficiency. Simulations showed that, in comparison to the original hybrid suspension system, the designed hybrid suspension effectively improved the energy-regenerative efficiency, and that the dynamic performance indexes of the suspension were synchronously improved. Given the result of the simulation analysis, which were validated by bench tests, it is shown that the optimized energy-regenerative circuit presents an enhanced regeneration efficiency, with an improvement of nearly 13% compared to the original suspension system.
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Zou, Junyi, Xuexun Guo, Lin Xu, Gangfeng Tan, Chengcai Zhang, and Jie Zhang. "Design, Modeling, and Analysis of a Novel Hydraulic Energy-Regenerative Shock Absorber for Vehicle Suspension." Shock and Vibration 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/3186584.
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To reduce energy consumption or improve energy efficiency, the regenerative devices recently have drawn the public’s eyes. In this paper, a novel hydraulic energy-regenerative shock absorber (HERSA) is developed for vehicle suspension to regenerate the vibration energy which is dissipated by conventional viscous dampers into heat waste. At first, the schematic of HERSA is presented and a mathematic model is developed to describe the characteristic of HERSA. Then the parametric sensitivity analysis of the vibration energy is expounded, and the ranking of their influences is k1≫m2>m1>k2≈cs. Besides, a parametric study of HERSA is adopted to research the influences of the key parameters on the characteristic of HERSA. Moreover, an optimization of HERSA is carried out to regenerate more power as far as possible without devitalizing the damping characteristic. To make the optimization results more close to the actual condition, the displacement data of the shock absorber in the road test is selected as the excitation in the optimization. The results show that the RMS of regenerated energy is up to 107.94 W under the actual excitation. Moreover it indicates that the HERSA can improve its performance through the damping control.
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Kuznetsov, Valeriy G., Oleg I. Sablin, and Alenka V. Chornaya. "Improvement of the regenerating energy accounting system on the direct current railways." Archives of Transport 36, no. 4 (December 31, 2015): 35–42. http://dx.doi.org/10.5604/08669546.1185200.
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Purpose. Monitoring of current state of quantitative indices of regenerative energy in the suburban movement, the analysis of the factors influencing its volumes and improvement the principles of the train regenerative energy accounting on the basis of it. Relevance. Development of effective measures of increase the regeneration efficiency of the electric power in system of electric traction demands comprehensive completeness of information on quantitative indices of regeneration energy volumes at all possible levels of its analysis, in particular on the corresponding sections of RS movement that will allow to establish the influence on the level of regeneration of various factors, such as parameters of traction power supply and the organization of train service. As the existing system of the regenerative energy accounting does not allow to consider the specified factors, development of the principles for increasing the efficiency of the analysis of volumes of return energy to a contact line during regenerative braking on DC rolling stock is the actual direction of researches. Collective monitoring of regeneration energy volumes by specialists of locomotive service, power supply and traffic operating departments will be essentially new approach to definition of real factors and taking effective decisions for increasing of using of regenerative energy. Scientific novelty. It’s offered to consider the influence on quantitative indices of regenerative energy the parameters of traction power supply and the organization (sizes) of traffic service on sections. Practical importance. Increasing the efficiency of the regeneration energy accounting is an important element in drawing up the balance of energy for electric traction system, development of the effective methods for improvement of the conditions of regeneration in it and in estimation of its power indicators in general.
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Zheng, Peng, Ruichen Wang, Jingwei Gao, and Xiang Zhang. "Parameter Optimisation of Power Regeneration on the Hydraulic Electric Regenerative Shock Absorber System." Shock and Vibration 2019 (June 11, 2019): 1–13. http://dx.doi.org/10.1155/2019/5727849.
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With the increasingly prominent energy issues, regenerative shock absorber has attracted intensive attention in last two decades for the development of structure design. However, the researchers sometimes concentrate on conceptual designs without considering optimal parameter refinements. This paper proposes a regenerative shock absorber called the “hydraulic electric regenerative shock absorber (HERSA)” which includes an analytical regeneration performance parameters optimisation approach to promote the regeneration efficiency and regenerated power. The developed HERSA model is able to convert oscillatory motion into unidirectional rotary motion through the alteration of hydraulic flow while recovering power by a generator. The proposed model is also capable of obtaining the optimal parameters at certain condition, as well as providing the flexibility of different component combinations to match specific system need. The results demonstrate that the proposed model can effectively decide the optimal parameters in the system, and also the recoverable power can achieve average power of 331 W at 1 Hz-25 mm sinusoidal excitation in the system, which is approximately 65% efficiency. This study can be further used to guide prototype design in future study.
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MONARKIN, Nikolay N., Sergey V. LUKIN, and Aleksandr A. KOCHKIN. "INFLUENCE OF GEOMETRIC, THERMOPHYSICAL AND OPERATING PARAMETERS ON THERMAL EFFICIENCY OF REGENERATIVE HEAT EXCHANGER." Urban construction and architecture 9, no. 4 (December 15, 2019): 33–38. http://dx.doi.org/10.17673/vestnik.2019.04.6.
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The influence of geometric (length, diameter and wall thickness of a unit equivalent channel of the nozzle), thermophysical (density and heat capacity of the nozzle material) and operating parameters (air flow through the regenerator and the time of one stage of accumulation / regeneration of thermal energy) on the thermal efficiency of stationary switching regenerative heat exchangers was studied . It was revealed that by varying the length and diameter of the channel and air flow, it is possible to increase thermal efficiency up to 10%. It was found that the wall thickness of a single channel, the density and heat capacity of the material of the nozzle, as well as the time of one stage, slightly aff ect the thermal efficiency of the regenerative heat exchanger.
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Abdullah, Mohd Azman, Noreffendy Tamaldin, Muhammad Afiq Mohamad, Rahiman Salmi Rosdi, and Mohd Noor Ikhwan Ramlan. "Energy Harvesting and Regeneration from the Vibration of Suspension System." Applied Mechanics and Materials 699 (November 2014): 800–805. http://dx.doi.org/10.4028/www.scientific.net/amm.699.800.
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Two conceptual designs of energy regenerative suspension have been developed using commercial computer aided design (CAD) software. The designs are based on the available conventional suspension. They consist of basic magnet and coil for electrical energy regeneration and additional components for magnet support and coil winding circular holder. The selection of the design is based on weighted matrix which consists of reliability, cost, time consumption and weight. The score of the matrix is formulated based on relative weighted factor among the selections. All designs are fabricated using selected and available materials. The actual cost, time consumption and weight of the suspensions are compared with the theoretical weighted scores. Standard processes of cuttings, fittings and welding are performed in fabrication. Suitable magnet design is attached on the suspensions. The other moving part of the suspensions is attached by coil and coil holder. The suspensions are tested with various strokes and frequencies for feasibility studies and energy regeneration capability using suspension test rig. The evaluation of the suspensions is performed based on actual experimental results of voltage and power regenerated.
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Wei, Wei, Qiang Li, Fangchao Xu, Xiaoyou Zhang, Junjie Jin, Jiaqi Jin, and Feng Sun. "Research on an Electromagnetic Actuator for Vibration Suppression and Energy Regeneration." Actuators 9, no. 2 (May 22, 2020): 42. http://dx.doi.org/10.3390/act9020042.
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This paper proposes an electromagnetic actuator that concurrently realizes two working functions of vibration suppression and energy regeneration. The actuator consists of four permanent magnetic rings, three soft iron rings, three coils, and three springs. The design of the electromagnetic actuator is based on finite element method (FEM) analysis, and the prototype is based on this analysis. Based on the prototype, the characteristics of the electromagnetic actuator, which has an output force–current coefficient of 39.49 N/A, are explored. A control algorithm with a position controller and an acceleration controller are applied to the actuator. When an impulse excitation is input to the electromagnetic actuator, the acceleration of the controlled object decreases from 114.26 m/s2 to 3.14 m/s2 here. Moreover, when the sinusoidal excitation with a 3 mm amplitude and 5 Hz frequency is input to the electromagnetic actuator, the vibration amplitude of the controlled object is 0.045 mm, suppressed within 1.46% when compared with the input signal. The peak value of the regenerated electromotive force is 1.97 V here, and the actuator efficiency for regenerating energy is 11.59%. The experimental results with multiple frequencies and amplitudes also show that the amplitude of the controlled object can be suppressed within 5.5%, and that the ratio of the electromotive force (EMF) to the input amplitude is 0.13. The results indicate that this electromagnetic actuator can suppress vibrations effectively and regenerate energy from vibrations.
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Zhang, Cheng Cai, Zhe Xiong, Zhi Gang Fang, and Xue Xun Guo. "The Operating Principle and Experimental Verification of the Hydraulic Electromagnetic Energy-Regenerative Shock Absorber." Advanced Materials Research 655-657 (January 2013): 1175–78. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1175.
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This paper introduces a new type of shock absorber: hydraulic electromagnetic energy-regenerative shock absorber (HESA), which can simultaneously implement the function of damping vibration and regenerating a portion of dissipated energies generated from passing through the damping hole. A test bench was trial-produced and used to prove the feasibility of the energy-regenerative scheme. The situation that hydraulic motor rotational speed has a sudden change in the energy regenerating process is theoretically analyzed.
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Chen, Chih-Hao, Yu-Hao Kang, Jing-Hung Lu, Ming-Lang Hung, Jyi-Ching Perng, and Jiun-Jen Chen. "Electrothermal Desiccant Regeneration Technique for Air Dehumidification." Processes 9, no. 7 (June 22, 2021): 1082. http://dx.doi.org/10.3390/pr9071082.
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Adsorption dehumidification and drying equipment is essential general equipment for domestic and industrial use. The most commonly used type in industry is the compressed air adsorption dryer. The analysis results show that the heat loss of the traditional heat air regeneration system of the compressor dryer is 39.4%, and the exhaust waste heat is 32.4%. The actual use of heat energy for desiccant regeneration is only 28.2%. Therefore, this study uses an innovative electrothermal adsorbent unit (ETAU) to regenerate the desiccant. By directly heating the adsorbent, heat loss can be effectively improved. On the other hand, the composite arrangement of zeolite and activated alumina is used. The inlet compressed air is firstly treated by the activated alumina, which has a high adsorption capacity in the high relative humidity condition, then a zeolite is used as a second part to make the dew point reach –40 °C. In the regeneration step, the airflow direction is reversed, whereby the zeolite is regenerated by the ETAU, and the waste heat of the exhaust air is used to regenerate the activated alumina, which reduces the temperature of the exhaust air. Compared with the traditional heat air compressed air system, the two technologies can save about 27% energy in total.
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Yang, R., and P. L. Wang. "Experimental Study for a Double-Glazed Forced-Flow Solar Collector/Regenerator." Journal of Solar Energy Engineering 120, no. 4 (November 1, 1998): 253–59. http://dx.doi.org/10.1115/1.2888128.
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Experimental study of a double-glazed forced-convection solar collector/regenerator for absorption solar cooling is presented. The south facing experimental solar collector/ regenerator with 10 deg slope is located at Kaohsiung, Taiwan at 120°18′ E longitude and 22°34′ N latitude. The size of the collector is 1 m wide and 7 m long with an effective regeneration area of 0.9 m by 6 m. Previous study for single-glazed forced-convection solar collector/regenerator operated at the same location has shown to have a best day-average efficiency of 17 percent. In order to raise the system performance, a double-glazed collector/regenerator is constructed such that air can be preheated in the upper channel flow. The preheated air is then conducted into the lower channel where it contacts with the film flow of solar heated lithium-chloride solution and regenerates the solution by carrying out the evaporated water vapor. The preheated air has lower relative humidity but the same humidity ratio since it is sensibly heated. Therefore, the regeneration driving potential is increased. The present study shows that the best day-average efficiency can reach 20 percent which increases the feasibility of the open-cycle absorption solar cooling system. Effects of controlling parameters on the collector/regenerator performance are studied, and heat and mass transfer correlations are also presented for design purposes.
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Li, Xian Li, Chao Li, Jian Lv, Zhi Gang Zhang, and Shi Jun You. "Influencing Parameters Analysis of Solar Energy Regenerator Performance." Advanced Materials Research 485 (February 2012): 446–49. http://dx.doi.org/10.4028/www.scientific.net/amr.485.446.
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The paper studied the effect of running and structural parameters on solar energy regenerator performance, in which pebble was storage material. Comparing simulated values to tested values of outlet air temperature, good agreement was achieved, which proved the model was correct. Taking average regenerative power as target function, the simulated results showed that the larger inlet air temperature, the larger average regenerative power. The smaller void fraction, the larger average regenerative power. The larger cross section velocity, the larger average regenerative power.
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Gao, Yong Qiang, Jin Qiu Zhang, Jie Yue, and Zhi Zhao Peng. "Design and Damping Force Analysis for Turbine Composite Regenerative Damper." Advanced Materials Research 446-449 (January 2012): 1360–65. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.1360.
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Turbine composite regenerative damper is one of new type damper which can regenerate the energy of vibration. The component and principle of generator and regenerate energy for turbine composite regenerative damper is introduce, and based on hydrodynamics and axial turbine basic principle, the relationship between induced electromotive force and piston velocity ,load resistance is induced. At last, the relationship between damping force and piston velocity, load resistance is induced too. The method is meaningful to understand and instruct the design of turbine composite regenerative damper.
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Cunillera, Alejandro, Adrián Fernández-Rodríguez, Asunción P. Cucala, Antonio Fernández-Cardador, and Maria Carmen Falvo. "Assessment of the Worthwhileness of Efficient Driving in Railway Systems with High-Receptivity Power Supplies." Energies 13, no. 7 (April 10, 2020): 1836. http://dx.doi.org/10.3390/en13071836.
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Eco-driving is one of the most important strategies for significantly reducing the energy consumption of railways with low investments. It consists of designing a way of driving a train to fulfil a target running time, consuming the minimum amount of energy. Most eco-driving energy savings come from the substitution of some braking periods with coasting periods. Nowadays, modern trains can use regenerative braking to recover the kinetic energy during deceleration phases. Therefore, if the receptivity of the railway system to regenerate energy is high, a question arises: is it worth designing eco-driving speed profiles? This paper assesses the energy benefits that eco-driving can provide in different scenarios to answer this question. Eco-driving is obtained by means of a multi-objective particle swarm optimization algorithm, combined with a detailed train simulator, to obtain realistic results. Eco-driving speed profiles are compared with a standard driving that performs the same running time. Real data from Spanish high-speed lines have been used to analyze the results in two case studies. Stretches fed by 1 × 25 kV and 2 × 25 kV AC power supply systems have been considered, as they present high receptivity to regenerate energy. Furthermore, the variations of the two most important factors that affect the regenerative energy usage have been studied: train motors efficiency ratio and catenary resistance. Results indicate that the greater the catenary resistance, the more advantageous eco-driving is. Similarly, the lower the motor efficiency, the greater the energy savings provided by efficient driving. Despite the differences observed in energy savings, the main conclusion is that eco-driving always provides significant energy savings, even in the case of the most receptive power supply network. Therefore, this paper has demonstrated that efforts in improving regenerated energy usage must not neglect the role of eco-driving in railway efficiency.
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Chi, Xiaolou, Ke Yang, and Qiang Fu. "Analysis of regenerated roof and instability support control countermeasures in a steeply dipping working face." Energy Exploration & Exploitation 38, no. 4 (December 30, 2019): 1082–98. http://dx.doi.org/10.1177/0144598719897422.
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Roof regeneration in coal mining occurs when the remaining bottom slice of thick coal is re-mined. In view of the challenges of roof fall and instability support of a regenerative roof in the mining of steeply dipping coal seams, combined with the geological and engineering conditions of the working face in the Panbei Coal Mine, the mechanism of the instability of the regenerative roof and support is studied, and control countermeasures are proposed. Based on the comprehensive combination of the measurement of the roof structure, physical simulation, numerical simulation, and theoretical analysis, the cementation and compaction degree of the regenerated roof were described. The caving and sliding law of the regenerated roof after bottom slice mining was explored, and the model of support dumping and sliding instability under the roof fall state was established. The results obtained yielded three main findings. Firstly, the compaction degree of the regenerative roof is higher than that of the middle part of the working face, and the compaction degree of the upper part of the working face is the smallest. Secondly, the overburden structure instability of the bottom slice underwent six stages. The fracture of the cantilever beam and the slippage of gangue are the reasons for the enhancement of the acoustic signal at each stage. Finally, the upper part of the stope was identified as the crucial zone in the prevention and control of the support instability. A moving method of metal mesh with pressure and roof scraping was developed, and the support anti-overturning and anti-skid jack was set up to effectively control the stability of the support and roof fall, for safe and efficient mining of a steeply dipping coal seam under a regenerative roof.
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Boonstra, Steven, and Frank Rieck. "Analysis of a Fictive Active e-Trailer." World Electric Vehicle Journal 9, no. 1 (June 4, 2018): 6. http://dx.doi.org/10.3390/wevj9010006.
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Trucks consume an enormous amount of diesel annually and contribute significantly to the total CO2 emissions around the world. Electrification of these freight vehicles would lead to a reduction in fuel consumption and CO2 emissions. Trailers, as part of heavy freight vehicles, are a great opportunity for innovative change. Electrifying the trailer would allow the combustion engine of the truck to cooperate with the electric motors in the trailer. The trailer would be able to regenerate energy using the electric motors built into the rear axis of the trailer. The energy that is regenerated could be stored in a battery power pack for later use. Using the principle of peak shaving, the combustion engine would be assisted by the active e-trailer. Peak shaving would occur when the calculated load on the combustion engine is highly above average, for example, during acceleration, climbing a hill, or during high speed. Energy from the power pack could be routed to the electric motors, adding propulsive force. This analysis of a fictive active e-trailer has focused on reducing fuel consumption and emissions. The energy consumption of the trailer and the energy regeneration were studied. For this analysis, two vehicle configurations were simulated within the MATLAB Simulink: one truck–trailer combination without the e-trailer application and one truck–trailer combination with the e-trailer application. Differences between the two simulated vehicle combinations have been analyzed and documented. The whole system would be self-sustaining by using the regenerating energy from braking and adjusting its assisting function according to the energy level of the power pack. However, better results would be achieved by charging the power pack periodically. By doing so, the reduction of fuel cost and emissions could be significantly improved.
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Abed, Saria, Taher Khir, and Ammar Ben Brahim. "Thermodynamic and Energy Study of a Regenerator in Gas Turbine Cycle and Optimization of Performances." International Journal of Energy Optimization and Engineering 5, no. 2 (April 2016): 25–44. http://dx.doi.org/10.4018/ijeoe.2016040102.
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In this paper, thermodynamic study of simple and regenerative gas turbine cycles is exhibited. Firstly, thermodynamic models for both cycles are defined; thermal efficiencies of both cycles are determined, the overall heat transfer coefficient through the heat exchanger is calculated in order to determinate its performances and parametric study is carried out to investigate the effects of compressor inlet temperature, turbine inlet temperature and compressor pressure ratio on the parameters that measure cycles' performance. Subsequently, numerical optimization is established through EES software to determinate operating conditions. The results of parametric study have shown a significant impact of operating parameters on the performance of the cycle. According to this study, the regeneration technique improves the thermal efficiency by 10%. The studied regenerator has an important effectiveness (˜ 82%) which improves the heat transfer exchange; also a high compressor pressure ratio and an important combustion temperature can increase thermal efficiency.
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AKAO, Satoru, and Shin MORISHITA. "OS1001 Vibration Control and Energy Regeneration by an Energy-Regenerative MR Damper." Proceedings of Conference of Kanto Branch 2016.22 (2016): _OS1001–1_—_OS1001–2_. http://dx.doi.org/10.1299/jsmekanto.2016.22._os1001-1_.
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Monarkin, Nikolay, Anton Sinitsyn, Denis Karpov, and Timur Akhmetov. "Method for designing energy-efficient ventilation systems based on regenerative heat exchangers." E3S Web of Conferences 178 (2020): 01037. http://dx.doi.org/10.1051/e3sconf/202017801037.
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The method of designing ventilation systems based on stationary switching regenerative heat exchangers is presented. Recommendations for selection of rational device parameters are given and substantiated. The diameter and thickness of a single channel wall of regenerative nozzle; the total diameter and length of nozzle; the time of heat accumulation or regeneration stages; the heat capacity and density of nozzle material; air flow rate are considered.
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Mączka, Eryk. "Healing process in Mineral asphalt mixtures." Transportation Overview - Przeglad Komunikacyjny 2018, no. 11 (November 1, 2018): 116–27. http://dx.doi.org/10.35117/a_eng_18_11_12.
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The article presents an issue related to the phenomenon of regeneration occurring in mineral-asphalt mixtures. The introduction of the work discusses the problem of decreasing strength and fatigue life of asphalt mixtures expressed by changing the stiffness modulus. Attention is paid to the complexity of this phenomenon, which is associated with microstructural changes. The review of the state of knowledge discusses a phenomenon called "healing" referring directly to the regeneration of mineral-asphalt mixtures. Later on, based on fatigue tests of the four-point bending beam in the controlled deformation mode, this phenomenon was analyzed. Rest periods between load and heating of samples regenerating the tested mixture are taken into account. Based on the analysis of the test results, it was found that the heating process is a more effective factor leading to a greater regeneration gain not only the stiffness of the sample, but also its lifespan expressed in cycles compared to the rest period. At the end of the work, hysteresis changes were shown to analyze energy changes and the essence of regenerative processes in the context of extending the life of mineral asphalt mixes used in the pavement construction layers.
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Hong, Sung Kook, Dong Soon Noh, and Eun Kyung Lee. "Experimental Study on the Regenerative Oxy-Fuel Combustion System with Ceramic Ball." Journal of Energy Engineering 22, no. 2 (June 30, 2013): 169–74. http://dx.doi.org/10.5855/energy.2013.22.2.169.
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Zi, Xiao Lin, Si Jing Guo, Xue Xun Guo, and Jing Pan. "A Study on the Theory and Performance Simulation of the Hydraulic Electromagnetic Energy-Regenerative Shock Absorber." Advanced Materials Research 798-799 (September 2013): 307–10. http://dx.doi.org/10.4028/www.scientific.net/amr.798-799.307.
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Hydraulic electromagnetic energy-regenerative shock absorber (HESA) is a new type of shock absorber which can regenerate a portion of energy dissipated as thermal energy in conventional shock absorber. This paper briefly describes HESAs working principle, uses AMESim, a hydraulic simulation software, to get damping characteristic of HESA as well as conventional passive shock absorber by doing some simulation tests, and contrasts the two consequents. Simulation results show that HESA has its unique damping characteristic, and its regenerative characteristic performs well.
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Nakano, Kimihiko, Yoshihiro Suda, and Shigeyuki Nakadai. "Self-Powered Active Vibration Control Using Regenerated Vibration Energy." Journal of Robotics and Mechatronics 11, no. 4 (August 20, 1999): 310–14. http://dx.doi.org/10.20965/jrm.1999.p0310.
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Active vibration control using regenerated vibration energy, i.e., self-powered active vibration control is proposed in which energy absorbed by a damper is stored in a condenser. An actuator produces control input using this stored energy. This requires no external energy. Energy used by the actuator is restricted to be less than energy regenerated. It is important to reduce energy consumption in the actuator. The control we developed requires less external energy than typical active control. A linear DC motor operating as an energy regenerative damper with high efficiency is used in experiments realizing self-powered active control and showing better isolation than passive control.
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Hasheminejad, Seyyed M., Amir H. Rabiee, and Miad Jarrahi. "Semi-Active Vortex Induced Vibration Control of an Elastic Elliptical Cylinder with Energy Regeneration Capability." International Journal of Structural Stability and Dynamics 17, no. 09 (October 23, 2017): 1750107. http://dx.doi.org/10.1142/s0219455417501073.
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The concept of energy-regenerative damping is adopted in semi-active vortex-induced vibration (VIV) suppression of an elastically supported inclined impenetrable elliptical cylinder modeled as a two degree-of-freedom (DOF) system in laminar cross-flow at low Reynolds numbers (Re = 210). It is based on the intelligent (model free) adaptive fuzzy sliding mode control (AFSMC) strategy in conjunction with switch-based energy regenerating circuit of a tunable electromagnetic (EM) damper. The semi-active damper is linked to the plant model in a multi-field co-simulation framework via MATLAB/Simulink coupled with a user defined function in a CFD package. The AFSM controller initially calculates the desired transverse control force for suppression of the cylinder VIV. Consequently, by smart adjustment of the variable circuit load resistance, the current flow through EM damper circuit is adaptively modulated in such a way that the damping force continually tracks its active counterpart in a semi-active manner. Furthermore, when the damper is operating in the regeneration mode, the mechanical vibration energy that is traditionally dissipated as heat in conventional viscous dampers will be stored as electric charge in a capacitor. Numerical simulations demonstrate that the regenerative semi-active EM-based VIV control system can effectively suppress the cylinder motion while recovering a certain portion of mechanical vibration energy through the cooperative action of two distinct operation modes of the EM damper. Unlike conventional active control systems, the proposed system does not require a large external power supply, and at least part of the required power may be provided by the recovered energy.
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Wang, Shu Hui, Meng Xu, and Ming Guo Yu. "Effect of Rotary Partition DPF Structure on its Regeneration Characteristics with Microwave." Applied Mechanics and Materials 556-562 (May 2014): 1013–16. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1013.
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The energy that traditional diesel particulate filter (DPF) regeneration with microwave requires in regeneration process often exceeds the capacity of the vehicle's battery, a rotary partition regenerative DPF with microwave is proposed recently, which was a annular column consisting of the fan-shaped filter units. A filtration unit microwave heating regeneration model was established aiming at this DPF, to study the regenerative properties of the filtration unit and to get influence that its shape structure plays on reproduction characteristics. The results show that: the central angle, length to diameter ratio, the ratio of inner and outer diameter of the DPF all have larger impact on the regeneration. The results can provide theoretical basis and reference for practical development of the new DPF.
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Wang, Ruochen, Yanshu Ding, Qing Ye, Renkai Ding, and Jingang Qian. "Research into the Effect of Supercapacitor Terminal Voltage on Regenerative Suspension Energy-Regeneration and Dynamic Performance." Shock and Vibration 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/6542015.
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To study the effect of supercapacitor initial terminal voltage on the regenerative and semiactive suspension energy-regeneration and dynamic performance, firstly, the relationship between supercapacitor terminal voltage and linear motor electromagnetic damping force and that between supercapacitor terminal voltage and recycled energy by the supercapacitor in one single switching period were both analyzed. The result shows that the linear motor electromagnetic damping force is irrelevant to the supercapacitor terminal voltage, and the recycled energy by the supercapacitor reaches the maximum when initial terminal voltage of the supercapacitor equals output terminal voltage of the linear motor. Then, performances of system dynamics and energy-regeneration were studied as the supercapacitor initial terminal voltage varied in situations of B level and C level road. The result showed that recycled energy by the supercapacitor increased at first and then decreased while the dynamic performance had no obvious change. On the basis of previous study, a mode-switching control strategy of supercapacitor for the regenerative and semiactive suspension system was proposed, and the mode-switching rule was built. According to simulation and experiment results, the system energy-regeneration efficiency can be increased by utilizing the control strategy without influencing suspension dynamic performance, which is highly valuable to practical engineering.
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Martin, V., and D. Y. Goswami. "Heat and Mass Transfer in Packed Bed Liquid Desiccant Regenerators—An Experimental Investigation." Journal of Solar Energy Engineering 121, no. 3 (August 1, 1999): 162–70. http://dx.doi.org/10.1115/1.2888428.
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Liquid desiccant cooling can provide control of temperature and humidity, while at the same time lowering the electrical energy requirement for air conditioning. Since the largest energy requirement associated with desiccant cooling is low temperature heat for desiccant regeneration, the regeneration process greatly influences the overall system performance. Therefore, the effects of variables such as air and desiccant flow rates, air temperature and humidity, desiccant temperature and concentration, and the area available for heat and mass transfer on the regeneration process are of great interest. Due to the complexity of the regeneration process, which involves simultaneous heat and mass transfer, theoretical modeling must be verified by experimental studies. However, a limited number of experimental studies are reported in the literature. This paper presents results from a detailed experimental investigation of the heat and mass transfer between a liquid desiccant (triethylene glycol) and air in a packed bed regenerator using high liquid flow rates. To regenerate the desiccant, it is heated to temperatures readily obtainable from flat-plate solar collectors. A high performance packing that combines good heat and mass transfer characteristics with low pressure drop is used. The rate of water evaporation, as well as the effectiveness of the regeneration process is assessed based on the variables listed above. Good agreement is shown to exist between the experimental findings and predictions from finite difference modeling. In addition, the findings in the present study are compared to findings previously reported In the literature. Also, the results presented here characterize the important variables that impact the system design.
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Do, Tri Cuong, Duc Giap Nguyen, Tri Dung Dang, and Kyoung Kwan Ahn. "A Boom Energy Regeneration System of Hybrid Hydraulic Excavator Using Energy Conversion Components." Actuators 10, no. 1 (December 22, 2020): 1. http://dx.doi.org/10.3390/act10010001.
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In this paper, a novel design of an energy regeneration system was proposed for recovering as well as reusing potential energy in a boom cylinder. The proposed system included a hydraulic pump/motor and an electrical motor/generator. When the boom moved down, the energy regeneration components converted the hydraulic energy to electrical energy and stored in a battery. Then, the regenerated energy was reused at subsequent cycles. In addition, an energy management strategy has been designed based on discrete time-optimal control to guarantee position tracking performance and ensure component safety during the operation. To verify the effectiveness of the proposed system, a co-simulation (using MATLAB and AMESim) was carried out. Through the simulation results, the maximum energy regeneration efficiency could achieve up to 44%. Besides, the velocity and position of the boom cylinder achieved good performance with the proposed control strategy.
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Sablin, Oleg, Valeriy Kuznetsov, Victor Shinkarenko, and Alexander Ivanov. "Rational distribution of excess regenerative energy in electric transport systems on the basis of fuzzy logic application." Archives of Transport 42, no. 2 (June 14, 2017): 53–63. http://dx.doi.org/10.5604/01.3001.0010.0527.
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Purpose. To develop the fuzzy model of distribution of excess regenerative energy in traction and external power supply systems allowing to exercise effective operation of the power equipment. Relevance. For effective distribution of excess regenerative energy in systems of electric transport, as well as for systems equipped with stationary stores of energy and inverting traction substations with regulators of output voltage it is necessary to solve a number of the problems with high degree of uncertainty demanding taking into account a set of random factors such as the modes of power lines and traction loadings. These factors have to be considered in operation for choosing the rational modes of energy stores, inverters and regulators of voltage on buses of substations to provide the rational conditions for energy regeneration on electric transport. Scientific novelty. The control system of energy storage devices, inverters and traction substation output voltage regulators, designed on the basis of fuzzy logic, can provide the necessary conditions for the regeneration on electric transport on sections with a shortage of traction power consumption and allows to optimize the distribution of excess braking energy of transport vehicles. It is achieved by determining the rational relationship between the components of the excess current of regeneration in real time, which can ensure a minimum of power losses of regenerative energy in traction and external power supply systems. Practical importance. The use of the developed approach is effective under the conditions of incomplete information received by measurement systems and on the basis of additional studies it can allow to minimize rated capacity of stores, inverters and traction substation output voltage regulators that could reduce the costs of modernization of existing sections and electrification of new electric transport systems.
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Montazeri-Gh, M., and O. Kavianipour. "Investigation of the active electromagnetic suspension system considering hybrid control strategy." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 10 (November 11, 2013): 1658–69. http://dx.doi.org/10.1177/0954406213511430.
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This paper deals with an electromagnetic damper, which is composed of a permanent-magnet direct current motor, a ball screw, and a nut, as an active actuator. The main objective pursued in the paper is to study the active electromagnetic suspension system (AEMSS) considering hybrid control strategy (the hybrid control strategy is a linear combination of skyhook and groundhook control strategy). For this purpose, the nonlinear equations of the electric circuit of the AEMSS should be developed. Supposing linear conditions, the coefficients determination of the hybrid control strategy is carried out in the frequency domain using the genetic algorithm in order to improve the vehicle performance and energy regeneration simultaneously. Afterwards, the achieved coefficients are used to examine the designed AEMSS in the actual conditions for an actual road profile. The simulation results demonstrate that the designed AEMSS has the desired performance while energy can be regenerated from the road excitation and transformed into electric energy. Furthermore, it has been shown that the designed AEMSS regenerates energy during the ascent and descent of a bump and consumes energy near the top of the bump.
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Ding, Renkai, Ruochen Wang, Xiangpeng Meng, and Long Chen. "Study on coordinated control of the energy regeneration and the vibration isolation in a hybrid electromagnetic suspension." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231, no. 11 (December 20, 2016): 1530–39. http://dx.doi.org/10.1177/0954407016675812.
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A type of hybrid electromagnetic suspension is proposed in this study to improve the reliability of a conventional active electromagnetic suspension. A motor with the proposed hybrid electromagnetic suspension linear can regenerate the vibration energy; the coordination relationship between the energy regeneration and the vibration isolation of the hybrid electromagnetic suspension is studied. A dynamic model is established, and a modified skyhook control strategy is designed. A passive energy regeneration control system and an active control system are developed. The effect of the damping on the energy regeneration and the vibration isolation is discussed. The best damping, which can consider the energy regeneration and the vibration isolation simultaneously, is determined. Comparative simulations of a passive suspension, a hybrid electromagnetic suspension and an active electromagnetic suspension are carried out, and the results verify the effectiveness of the control strategy. Finally, an energy regeneration experiment and an isolation comparative experiment of a quarter-suspension are conducted. The findings show that the hybrid electromagnetic suspension with a modified skyhook control strategy can efficiently facilitate coordination between the energy regeneration and the vibration isolation.
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Suntharalingam, Piranavan, John T. Economou, and Kevin Knowles. "Kinetic energy storage using a dual-braking system for an unmanned parallel hybrid electric vehicle." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231, no. 10 (November 13, 2016): 1353–73. http://dx.doi.org/10.1177/0954407016672591.
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In this paper a novel regenerative dual-braking strategy is proposed for utility and goods delivery unmanned vehicles on public roads, which improves their ability to recover regenerative energy and consequently improves the fuel use of parallel hybrid powertrain configurations for land unmanned vehicles where the priority is not comfort but extension of their range. Furthermore, the analysis takes into account the power-handling ability of the electric motor and the power converters. In previous research, a plethora of regenerative braking strategies have been reported; in this paper, the key contribution is that the vehicle electric regeneration is related to a fixed braking distance in relation to the energy storage capabilities specifically for unmanned utility-type land vehicles where passenger comfort is not a concern but pedestrian safety is of critical importance. Furthermore, the power converter capabilities of the vehicle facilitate the process of extending the braking time by introducing a variable-deceleration profile. The proposed approach has therefore resulted in a regenerative algorithm which improves the energy storage capability of the vehicle without considering the comfort since this analysis is applicable to unmanned vehicles. The algorithm considers the distance as the key parameter, which is associated with safety; therefore, it allows the braking time period to be extended, thus favouring the electric motor generation process while maintaining safety. This method allows the vehicle to brake for longer periods rather than for short bursts, hence resulting in more effective regeneration with reduced use of the dual system (i.e. the caliper–stepper motor brake system). The regeneration method and analysis are addressed in this paper. The simulation results show that the proposed regenerative braking strategy improved the ability of the hybrid powertrain configuration to recover energy significantly. The paper is also supported by experimental data that verify the theoretical development and the simulation results. The two strategies developed and implemented utilize a constant braking torque and a constant braking power. Both methods were limited to a fixed safety-based distance. Overall, the results demonstrate that the constant-braking-torque method results in better energy-based savings.
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Guntur, Harus Laksana, Wiwiek Hendrowati, and Tidy Budiarto. "Modeling and Analysis of Hybrid Shock Absorber for Military Vehicle Suspension." Applied Mechanics and Materials 493 (January 2014): 315–20. http://dx.doi.org/10.4028/www.scientific.net/amm.493.315.
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This paper deals with the design, modeling and analysis of a hybrid shock absorber for vehicle suspension. A specific design of frictional-electromagnetic-regenerative shock absorber is proposed. The hybrid shock absorber consists of the proposed frictional-electromagnetic-regenerative shock absorber assembled in parallel with a conventional-viscous shock absorber. The concept of hybrid shock absorber is proposed due to the following advantages: the regenerative shock absorber will recover some wasted vibration energy from the suspension into electrical energy to support the need for electrical energy of the vehicle, while the viscous shock absorber maintains the performance of suspension closed to its original suspension. The vehicle suspension system dynamic was mathematically modeled for three different types of suspension:1).Conventional suspension using viscous shock absorber; 2).Hybrid suspension using combination of 50% frictional-electromagnetic-regenerative shock absorberand50% viscous shock absorber; and 3).Full regenerative suspension using 100% frictional-electromagnetic-regenerative shock absorber. In this research, 6 wheels military vehicle (APC:Armour Personal Carrier) is chosen as the model due to the high possibility of applying regenerative suspension to the military/off road vehicle. Based on the mathematical models, performances of the vehicle suspension and the regenerated power from regenerative shock absorber (RSA) were simulated. The results were compared between the three types of suspension and discussed.
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Guntur, Harus Laksana, and Wiwiek Hendrowati. "A Comparative Study of the Damping Force and Energy Absorbtion Capacity of Regenerative and Conventional-Viscous Shock Absorber of Vehicle Suspension." Applied Mechanics and Materials 758 (April 2015): 45–50. http://dx.doi.org/10.4028/www.scientific.net/amm.758.45.
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This paper presents a comparative study of the damping force and energy absorbtion capacity of a typical conventional-viscous and a regenerative shock absorber for vehicle suspension. Regenerative shock absorber (RSA) is a shock absorber which can regenerate the dissipated vibration energy from vehicle suspension into electricity. In this research, a prototype of regenerative shock absorber was developed, its damping force and energy absorbtion capacity were tested, and the results were analized and compared with those of a typical conventional-viscous shock absorber. The regenerative and viscous shock absorber were compressed and extended in various excitation frequency using damping force testing equipment to obtain force-velocity and the force-displacement curves. The force-velocity and force-displacement curves indicate the damping force and energy absorbtion capacity of the shock absorber. The results show that the damping force of the typical-viscous shock absorber closed to linear at all exciation frequencies. For regenerative shock absorber, nonlinearity and large hysteresis area of the damping force occur at all excitation frequencies. Further, the energy absorbtion capacity of the typical-viscous shock absorber shows an elliptical area with the compression part bigger than the extension one, while those of the regenerative shock absorber shows an asymmetric square area, which indicates a smaller energy absorbtion capacity. These phenomena indicate the significant effect of implementing dry friction damper and elctrical damper to the characteristics of regenerative shock absorber.
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Mirtchev, Alex, Theodoros Mouselinos, Stylianos Syrigos, and Emmanuel Tatakis. "Behavioral Analysis of Potential Induced Degradation on Photovoltaic Cells, Regeneration and Artificial Creation." Energies 14, no. 13 (June 29, 2021): 3899. http://dx.doi.org/10.3390/en14133899.
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Many photovoltaic (PV) parks suffer from a decrement in their generated power capability due to a phenomenon called potential induced degradation (PID). In this paper, a regenerative system using a high step-up DC–DC converter is proposed, for regenerating PV cells that have been degraded due to the PID effect. The same device also can be used for artificially creating PID on PV panels in order to study the effects of the PID under controlled conditions. The power converter offers multiple voltage levels at the output to adapt to various voltage ratings of PV parks. The device has plug-and-play features, ultra-low cost, small size and is simple in operation. Experimental tests are conducted in real PV panels and comparative results verify the operational principles of the proposed system. The artificial creation of the PID phenomenon and the regeneration of the PV cells are successfully proven experimentally.
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Syuhri, Skriptyan Noor Hidayatullah, and Nasrul Ilminnafik. "Damping Force and Energy Regeneration Characteristics of the Regenerative Pendulum Vibration Absorber." Applied Mechanics and Materials 865 (June 2017): 434–41. http://dx.doi.org/10.4028/www.scientific.net/amm.865.434.
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This paper presents the characteristics of damping force and energy regeneration of a pendulum. The damping force analysis includes force-displacement and force velocity loops when the pendulum, attached in a cart, is subjected with sinusoidal displacement input. The energy regeneration analysis includes the voltage, the current and the power generated by a generator. The main objectives of this paper are to obtain the mathematical models and to characterize both force and energy regeneration based on the inputs. The results show that the amplitudes and the frequencies at low level are most likely basic damper behavior. Moreover, the energy regeneration increases as well as the amplitude and the frequency.
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ADACHI, Kazuhiko. "204 Vibration Energy Regeneration, from Energy Regeneration to Energy Harvesting." Proceedings of the Symposium on Evaluation and Diagnosis 2009.8 (2009): 96–101. http://dx.doi.org/10.1299/jsmesed.2009.8.96.
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Liu, Ji Shun, Jun Li, Yong Sheng Zhang, Liang Chu, and Liang Yao. "Research on the Braking System Control Strategy of Hybrid Electronic Bus." Applied Mechanics and Materials 148-149 (December 2011): 1231–35. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.1231.
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As one of the key technologies of Hybrid Electronic Bus, regenerative braking technology can recover energy without changing the traditional bus braking habit. This is of vital importance in the research of regenerative braking system. Because the braking force distribution relationship between the front and rear axle of the vehicle has a remarkable influence in the braking stability,especially adding the regenerative braking force, the influence is even larger. So the anti-lock braking control strategy for the hybrid electronic vehicle is updated in this paper according to the condition of regenerative braking. The anti-lock braking control and regenerative braking control were integrated in one ECU (Electronic Control Unit) of braking control system, collecting signals of wheel rotate speed, vehicle speed, SOC and brake pedal position by CAN bus. And the output control commands are sent to the execution unit of anti-lock braking system and regenerative braking system. The effectiveness of energy regeneration and the braking stability of this strategy are tested on the off-line simulation platform.
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Guo-Zhu, Zhao, Huang Xiang, and Peng Xing. "Adaptive Model Predictive Control Research on Regenerative Braking for Electric Bus Cruising Downhill." Journal of Advanced Manufacturing Systems 15, no. 03 (July 26, 2016): 133–50. http://dx.doi.org/10.1142/s0219686716500104.
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To use regenerative brake and mechanical brake co-operatively to maintain the constant speed and the braking energy can be regenerated as much as possible when vehicles travel downhill, the mathematical model of the braking system is established, and the adaptive model predictive control method is adopted to control the speed of vehicles. The recursive least square algorithm with the forgetting factor is used to identify the road gradient online. And then the control results of the adaptive model predictive control are compared with the results of PID control, simulation results show that the robustness and the stability of the adaptive model predictive control method are better. The speed can be maintained basic stability with the coordinated use of the regenerative braking and the mechanical braking. Meanwhile, the braking energy can be regenerated as much as possible as the regenerative braking system can be used as much as possible. Moreover, as the charge acceptance ability of the battery is restricted, the brake mode switching model is designed. The braking mode can be switched between the electro-mechanical braking system and mechanical braking system according to the SOC of the batteries.
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Huang, Jinhui, Enrong Wang, and Hailong Zhang. "Analysis and Research on the Comprehensive Performance of Vehicle Magnetorheological Regenerative Suspension." Vehicles 2, no. 4 (October 22, 2020): 576–88. http://dx.doi.org/10.3390/vehicles2040033.
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Magnetorheological (MR) regenerative suspension system can not only achieve excellent comprehensive suspension performance but also effectively recover and utilize vibration potential energy, which has been a research hotspot in the field of vehicle engineering. In this paper, for the 1/4 vehicle’s MR regenerative suspension system parallel with a tubular permanent magnet linear motor (TPMLM), the dynamic model of the MR semi-active suspension system and the TPMLM finite element model are established separately to form a joint simulation platform. The simulation analysis of the comprehensive suspension performance and regeneration performance under different road excitations is performed. The results show that installing TPMLM does not change the natural resonance frequency of the suspension system, which ensures good driving comfort and handling stability. At the same time, it has considerable regeneration power. This research can provide a reference for the stability analysis and popularization of the vehicle’s MR regenerative suspension system.
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Teng, Fei, Jian Gang Lv, Yao Sun, and Shao Yan Guo. "Investigation of Control Strategy for Hydraulic Auxiliary Braking of Tracked Vehicle Based on Pump Efficiency Analysis." Applied Mechanics and Materials 184-185 (June 2012): 1633–36. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.1633.
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On the basis of hydrostatic and hydraulic auxiliary braking system for tracked vehicle, the hydraulic pump efficiency was analyzed and discussed. And the model according to the performance analysis was set up, and the optimal working line in which the hydraulic pump working at the highest efficiency level was obtained. And an energy regenerative braking control strategy was proposed which can lead to the optimal matching of hydraulic coupler, hydraulic pump/motor. The computing results show that the hydraulic pump/motor can achieve efficient operation, and the energy regeneration efficiency of braking was improved obviously with the regenerative braking control strategy under the safe braking condition.
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Hasegawa, Hiroaki, and Masanori Sato. "Acquisition of Quasi-Monochromatic Dual-Energy in a Microfocus X-ray Generator and Development of Applied Technology." Diagnostics 9, no. 1 (March 4, 2019): 27. http://dx.doi.org/10.3390/diagnostics9010027.
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In regenerative medicine, evaluation of bone mineral density using a microfocus X-ray generator could eventually be used to determine the degree of bone tissue regeneration. To evaluate bone mineral density against regenerated bone material, two low-energy X-rays are necessary. Herein, the acquisition of quasi-monochromatic, dual-energy soft X-ray and the subsequent medical application were examined using the K-absorption edges of two types of metal filters (i.e., zirconium and tin) in a microfocus X-ray generator. Investigation of the optimal tube voltage and filter thickness to form a quasi-monochromatic energy spectrum with a single filter revealed that a filter thickness of 0.3 mm results in an optimal monochromatization state. When a dual filter was used, the required filter thickness was 0.3 mm for tin and 0.2 mm for zirconium at a tube voltage of 35 kV. For the medical application, we measured quasi-monochromatic, dual-energy X-rays to evaluate the measurement accuracy of bone mineral density. Using aluminum as a simulated bone sample, a relative error of ≤5% was consistent within the aluminum thickness range of 1–3 mm. These data suggest that a bone mineral density indicator of recycled bone material can be easily obtained with the quasi-monochromatic X-ray technique using a microfocus X-ray generator.
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Popov, Valentin L., Aleksandr M. Poliakov, and Vladimir I. Pakhaliuk. "Synovial Joints. Tribology, Regeneration, Regenerative Rehabilitation and Arthroplasty." Lubricants 9, no. 2 (February 2, 2021): 15. http://dx.doi.org/10.3390/lubricants9020015.
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Synovial joints are unique biological tribosystems that allow a person to perform a wide range of movements with minimal energy consumption. In recent years, they have been increasingly called “smart friction units” due to their ability to self-repair and adapt to changing operating conditions. However, in reality, the elements of the internal structure of the joints under the influence of many factors can degrade rather quickly, leading to serious disease such as osteoarthritis. According to the World Health Organization, osteoarthritis is already one of the 10 most disabling diseases in developed countries. In this regard, at present, fundamental research on synovial joints remains highly relevant. Despite the fact that the synovial joints have already been studied fully, many issues related to their operating, prevention, development of pathology, diagnosis and treatment require more detailed consideration. In this article, we discuss the urgent problems that need to be solved for the development of new pharmacological agents, biomaterials, scaffolds, implants and rehabilitation devices for the prevention, rehabilitation and improvement of the treatment effectiveness of synovial joints at various stages of osteoarthritis.