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Journal articles on the topic 'Flowrate control'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Peng, Shuang, Fanglong Yin, and Yong Hu. "An Improved Zero-Flowrate Switching Control Method to Reduce Switching Losses in a Hydraulic Actuator." Actuators 13, no. 4 (2024): 137. http://dx.doi.org/10.3390/act13040137.

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Hydraulic switching actuators are high-efficiency, fast response, and low-cost solutions for hydraulic control systems. One of the challenging problems is throttling losses during valve transitions. Previously, the authors proposed a zero-flowrate switching method to reduce the throttling energy loss of the switching valve, where a hydraulic resonator is applied to make the flowrates through the lines approaching zero before the valves are switched off. The major challenge of this approach is fast switching valves whose transition times are less than 2 ms. In this paper, an improved zero-flowr

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2

Avila, Raudel, Yixin Wu, Rinaldo Garziera, John A. Rogers, and Yonggang Huang. "Analytical Modeling of Flowrate and Its Maxima in Electrochemical Bioelectronics with Drug Delivery Capabilities." Research 2022 (March 4, 2022): 1–13. http://dx.doi.org/10.34133/2022/9805932.

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Flowrate control in flexible bioelectronics with targeted drug delivery capabilities is essential to ensure timely and safe delivery. For neuroscience and pharmacogenetics studies in small animals, these flexible bioelectronic systems can be tailored to deliver small drug volumes on a controlled fashion without damaging surrounding tissues from stresses induced by excessively high flowrates. The drug delivery process is realized by an electrochemical reaction that pressurizes the internal bioelectronic chambers to deform a flexible polymer membrane that pumps the drug through a network of micr

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3

Saiz-Rubio, Verónica, Coral Ortiz, Antonio Torregrosa, et al. "Modelling Vineyard Spraying by Precisely Assessing the Duty Cycles of a Blast Sprayer Controlled by Pulse-Width-Modulated Nozzles." Agriculture 13, no. 2 (2023): 499. http://dx.doi.org/10.3390/agriculture13020499.

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The flowrate control of spraying systems with pulse-width-modulated solenoid valves is currently being implemented for precision herbicide application in commodity crops, but solutions for fruit trees set in orchards that require higher pressures are mostly in the development stage. A reason for this has been the higher flowrate and pressure requirements of blast sprayers used for dense canopies typical of high value crops. In the present study, the duty cycles preset by an operator were compared to the actual ones estimated from measuring flowrates. A new developed air-assisted orchard spraye

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Li, Dong, Jie Hang, Yunhua Li, and Sujun Dong. "Fuel Flowrate Control for Aeroengine and Fuel Thermal Management for Airborne System of Aircraft—An Overview." Applied Sciences 12, no. 1 (2021): 279. http://dx.doi.org/10.3390/app12010279.

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Fuel flowrate control system and fuel thermal management are very important for aeroengine and the overall aircraft, and it has been researched for several decades. This survey paper makes a comprehensive and systematic overview on the exiting fuel flowrate regulation methods, thermal load of fuel metering units, fuel-based thermal management, and the fuel tank’s thermal management topology network with drain and recirculation. This paper firstly reviews the mechanism, technical advantages, and technical challenges of the fuel metering unit with flowrate control valve and constant pressure dif

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Dragunov, A. I., and K. A. Trukhanov. "METHODOLOGY FOR CALCULATING THE FLOW-RATE CHARACTERISTICS OF A CHEMICAL INJECTION METERING (THROTTLE) VALVE WITH A LAMINAR AND TURBULENT STAGE OF A SHUT-OFF AND CONTROL ELEMENT." Spravochnik. Inzhenernyi zhurnal, no. 325 (April 2024): 24–38. http://dx.doi.org/10.14489/hb.2024.04.pp.024-038.

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The article discusses the methodology for calculation the flowrate-drop characteristic of chemical injecting valve with a laminar and turbulent stage of a locking and regulating element (LRE). Three types of chemicals widely used in the oil industry are used as input data. In addition, the calculation was made for three different flowrates of these types of chemicals. It is shown that, in contrast to the “cone to edge” valve type of reverse flowrate, with the use of two-stage LRE, a linear from of the flow-difference characteristic and the flow characteristic of the valve is achieved. The depe

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HABIB, ROBERT SH, and QAIS A. H. ALNOUMAN. "Microcomputer-based liquid flowrate control system." International Journal of Electronics 65, no. 1 (1988): 117–25. http://dx.doi.org/10.1080/00207218808945210.

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7

Shen, Hai-Feng, Xin-Jian Zhu, Meng Shao, and Hong-fei Cao. "Neural Network Predictive Control for Vanadium Redox Flow Battery." Journal of Applied Mathematics 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/538237.

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The vanadium redox flow battery (VRB) is a nonlinear system with unknown dynamics and disturbances. The flowrate of the electrolyte is an important control mechanism in the operation of a VRB system. Too low or too high flowrate is unfavorable for the safety and performance of VRB. This paper presents a neural network predictive control scheme to enhance the overall performance of the battery. A radial basis function (RBF) network is employed to approximate the dynamics of the VRB system. The genetic algorithm (GA) is used to obtain the optimum initial values of the RBF network parameters. The

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8

Amanowicz, Łukasz. "Controlling the Thermal Power of a Wall Heating Panel with Heat Pipes by Changing the Mass Flowrate and Temperature of Supplying Water—Experimental Investigations." Energies 13, no. 24 (2020): 6547. http://dx.doi.org/10.3390/en13246547.

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Renewable energy sources for the purpose of heating buildings cooperate perfectly with so-called low-temperature heating systems. Water loop surface heating systems had been thoroughly tested. In contrast, thermal performance of wall panels with heat pipes have not been fully recognized, yet. The determination of the thermal power as well as the control of panels thermal performance cannot be performed with the methods developed for water loop systems. In this paper, the novel heating panels with heat pipes were tested to analyze the possibility of controlling their performance by changing the

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9

Peng, Shuang. "Modeling and Theoretical Analysis of Zero-Flowrate-Switching Control Method for a Dynamic Load System to Reduce Switching Power Loss of Control Valves." Actuators 12, no. 5 (2023): 183. http://dx.doi.org/10.3390/act12050183.

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Valve switching is one of the most important power losses in digital hydraulics. In this paper, a dynamic Zero-Flowrate-Switching (ZFS) control method is developed for hydraulic/pneumatic systems. The proposed control strategy is to actively reduce the flowrate passing through the valve to zero before switching off the valve. To realize it, an accessory line, in which a RLC oscillator is applied to generate a sinusoidal flowrate, is allocated parallel to the main control line for flowrate regulation. The pressure, with high frequency and small amplitude wave outputs from a regular piston pump,

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10

Mao, Yucai, Yunxiang Wang, Lei Zhang, and Qiuju Guo. "A HUMIDITY CONTROL TECHNIQUE BASED ON NAFION MEMBRANE AND ITS APPLICATION ON THE EVALUATION OF HUMIDITY RESPONSE FOR RADON MONITOR." Radiation Protection Dosimetry 184, no. 3-4 (2019): 448–52. http://dx.doi.org/10.1093/rpd/ncz083.

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Abstract Electrostatic collection technique is widely used in various radon monitors. The mechanism of this kind of radon monitor is that the positive Po particles, produced by decay of radon, can be collected on the surface of detector in electric field. Collection efficiency, therefore, could be affected by air humidity. Calibration under different humidity conditions or test of humidity response is necessary consequently. In this study, a humidity control technique based on Nafion membrane tube (NMT) is developed. Under a consistent flowrate with a certain stable level of radon concentratio

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11

Zhou, Su, Jie Jin, and Yuehua Wei. "Research on Online Diagnosis Method of Fuel Cell Centrifugal Air Compressor Surge Fault." Energies 14, no. 11 (2021): 3071. http://dx.doi.org/10.3390/en14113071.

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Stable operation of fuel cell air compressions is constrained by rotating surge in low flowrate conditions. In this paper, a diagnosis criterion based on wavelet transform to solve the surge fault is proposed. First of all, the Fourier transform was used to analyze the spectral characteristics of the outlet flowrate. Before wavelet transform was used, the data are standardized. This step eliminated the influence of the flowrate’s absolute value. Then, the wavelet coefficients under characteristic frequencies were extracted. Finally, the diagnosis criterion’s threshold, which indicates the surg

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12

Park, K., J. Kim, S. K. Kauh, S. T. Ro, and J. Lee. "Measurement of air flowrate by using an integration type ultrasonic flow meter applicable for spark ignition engine control." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 211, no. 2 (1997): 129–35. http://dx.doi.org/10.1243/0954407971526290.

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An integration type air flow meter (IFM), composed of an ultrasonic sensor with an integration circuit, is tested for the air flowrate measurement in a pulsating flow condition. An accurate air flowrate measurement is essential to control the fuel injection rate of a fuel injection spark ignition (SI) engine. The difficulty comes from the pulsating and reverse flow characteristics of the induction pipe. The IFM integrates the instantaneous flowrate signal during the quarter cycle corresponding to an intake period of a four-stroke four-cylinder engine in order to identify and account for the fl

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13

Tur, Bogac, Lucia Gühring, Olaf Wendler, and Stefan Kniesburges. "Influence of airflow and ligament tension on the acoustics of a biomimetic larynx model." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A340. http://dx.doi.org/10.1121/10.0027748.

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The phonation process is a complex interaction involving the airflow from the lungs, the oscillation of the vocal folds’ tissue, and the resultant acoustics. To understand the underlying physical mechanisms, an experimental model has been designed that allow the control of flowrate and longitudinal tension of the vocal folds. A synthetic biomimetic larynx model was applied that features airflow-driven vocal folds’ oscillations. The longitudinal stiffness of the vocal folds is controlled using embedded ligament fibers. The model enables to measure aerodynamic and acoustic signals as function of

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14

Peng, Guangzheng, and Tong Zhao. "A Dynamic Evaluation Technique for Liquid Flow Meters Based on Hydraulic Line Dynamics." Journal of Dynamic Systems, Measurement, and Control 119, no. 2 (1997): 305–7. http://dx.doi.org/10.1115/1.2801252.

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A new concept for the evaluation of flowmeter dynamic response is presented. A technique based on hydraulic line dynamics is applied to achieve accurate measurements of the reference flowrate. The major components in the equipment used in experimental verification of the theory were a test pipe, a pulsating flow generator, three pressure transducers, an A/D converter, and a microcomputer system. This equipment allowed the dynamic characteristics of a flowmeter to be investigated in both the time and frequency domains. Comparisons of flowrates measured using the line dynamic technique and the s

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15

Saediamiri, Meghdad, and Madjid Birouk. "New solid particle seeding generator for laser-based velocity measurements in reacting flows." Transactions of the Canadian Society for Mechanical Engineering 43, no. 1 (2019): 63–68. http://dx.doi.org/10.1139/tcsme-2017-0058.

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The design of a new solid particle seeding generator for laser-based velocity measurements in gaseous flows is reported. Performance tests revealed that the new seeder has the ability to control the concentration of seeding particles in a flow independently of the flowrate. It also can provide a steady supply of seeding particles, operate over an extended range of flowrate, and break up agglomerates into smaller particles. These features give this seeder advantages over its counterparts, especially at low volumetric flowrate.

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16

Soave, Nicolò, and Massimiliano Barolo. "On the Effectiveness of Heat-Exchanger Bypass Control." Processes 9, no. 2 (2021): 244. http://dx.doi.org/10.3390/pr9020244.

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In heat exchangers with bypassing, a fraction of the flowrate of one fluid (typically the one whose temperature needs to be controlled tightly) bypasses the exchanger and mixes right after the exchanger outlet with the fraction flowing through the exchanger. The advantages of this configuration are long known. Among them, the most significant is that it can improve heat-transfer control because the temperature dynamics is significantly faster than in a standard heat-exchanger configuration. Additionally, it can increase the rangeability of the process wherein the heat exchanger operates. Exist

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17

Fuladgar, Amir, and Zoha Vatani. "New empirical correlation for oil flowrate prediction through chokes." Journal of the Serbian Chemical Society 85, no. 5 (2020): 687–96. http://dx.doi.org/10.2298/jsc190520110f.

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Accurate prediction of choke restricted multiphase flowrate is always interesting in oil industry in the absence of flowmeters for field production monitoring and management purposes. Also, in a producing well, choke is installed for controlling the production rate. In this research, new correlation is developed for predicting the multiphase flowrate through choke specified for one of the Iranian southern oilfields. For this purpose, 166 sets of flowrate measurement data, was gathered and filtered to 142 data sets, at the quality control step. This data was regressed to a linearized modified c

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18

Viana, Sidney, and Cairo Lúcio Nascimento Jr. "Regulatory Control of Mass Flowrate in an Ore Feeding System with Time-Delayed Gain-Variant Dynamics." Journal of Applied Instrumentation and Control 9, no. 1 (2021): 19. http://dx.doi.org/10.3895/jaic.v9n1.13569.

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Brazil is the world leading producer and exporter of iron ore, mainly due to operations of VALE, a global mining company with several operations in the country, delivering iron, copper, manganese, and nickel ores. Those operations are located mainly in the Northern state of Pará, and in the Southeastern state of Minas Gerais. From 2014 to 2019, the company’s average yearly production of iron ore was about 342 million t/year. Most of such production was exported overseas, mainly to Asian and European countries.Mineral processing plants implement several stages of ore beneficiation, necessary to

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19

Ma, Shihong, Shuo Zhang, Jian Wu, Yongmin Zhang, Wenxiao Chu, and Qiuwang Wang. "Experimental Study on Active Thermal Protection for Electronic Devices Used in Deep−Downhole−Environment Exploration." Energies 16, no. 3 (2023): 1231. http://dx.doi.org/10.3390/en16031231.

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Electronic devices are commonly used for exploiting and extracting shale oil in deep downhole environments. However, high−temperature−and−pressure downhole environments jeopardize the safe operation of electronic components due to their severe thermal conditions. In the present study, an active thermal−insulation system is proposed, which consists of a spiral annular cooling plate (ACP), a thermal storage container with phase−change material (PCM) and an aerogel mat (AM). The effect of the ACP’s structure, layout and working−medium flowrate on the heat−protection performance were experimentall

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20

Avila, Raudel, Chenhang Li, Yeguang Xue, John A. Rogers, and Yonggang Huang. "Modeling programmable drug delivery in bioelectronics with electrochemical actuation." Proceedings of the National Academy of Sciences 118, no. 11 (2021): e2026405118. http://dx.doi.org/10.1073/pnas.2026405118.

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Drug delivery systems featuring electrochemical actuation represent an emerging class of biomedical technology with programmable volume/flowrate capabilities for localized delivery. Recent work establishes applications in neuroscience experiments involving small animals in the context of pharmacological response. However, for programmable delivery, the available flowrate control and delivery time models fail to consider key variables of the drug delivery system––microfluidic resistance and membrane stiffness. Here we establish an analytical model that accounts for the missing variables and pro

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21

Jeon, Seok-Yun, Joon-Yong Yoon, and Choon-Man Jang. "Bubble Size and Bubble Concentration of a Microbubble Pump with Respect to Operating Conditions." Energies 11, no. 7 (2018): 1864. http://dx.doi.org/10.3390/en11071864.

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The present paper describes some aspects of the bubble size and concentration of a microbubble pump with respect to flow and pressure conditions. The microbubble pump used in the present study has an open channel impeller of a regenerative pump, which generates micro-sized bubbles with the rotation of the impeller. The bubble characteristics are analyzed by measuring the bubble size and concentration using the experimental apparatus consisting of open-loop facilities; a regenerative pump, a particle counter, electronic flow meters, pressure sensors, flow control valves, a torque meter, and res

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Polianczyk, Eugene, Georgy Tarasov, and Andrey Zaichenko. "Gasification in the filtration combustion mode for disposal of medical waste with heat generation." E3S Web of Conferences 474 (2024): 01013. http://dx.doi.org/10.1051/e3sconf/202447401013.

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The gasification of medical waste (MW) in a counterflow updraft gasifier with a partial recycle of the generator gas to the combustion zone is considered as applied for MW disposal with a heat generation. The temperature regimes and material flows are assessed for a typical model MW composition with a humidity varied from 0 to 40 wt.%. A procedure for control of the process for varied MW composition is proposed. For a given MW composition and flowrate, the combustion temperature can be controlled to prescribed value 900°C via control of the flowrates of air and and recycled generator gas. Thro

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23

Pečar, Borut, Danilo Vrtačnik, Matic Pavlin, and Matej Možek. "A Rapid Prototyped Thermal Mass Flowmeter." Sensors 21, no. 16 (2021): 5373. http://dx.doi.org/10.3390/s21165373.

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An innovative rapid prototyping technique for embedding microcomponents in PDMS replicas was developed and applied on a thermal mass flowmeter for closed loop micropump flowrate control. Crucial flowmeter design and thermal parameters were investigated with a 3-D fully coupled electro-thermal-fluidic model which was built in Comsol Multiphysics 5.2. The flowmeter was characterized for three distinct measuring configurations. For precise low flowrate applications, a sensor-heater-sensor flowmeter configuration with a constant heater temperature was found to be the most appropriate yielding the

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O'Sullivan, Shane, Fernando Diaz, Ian Seymour, and Alan O'Riordan. "3D-Printed Microfluidics System Coupled with Electrochemical pH Control for Enhanced Chlorine Detection." ECS Meeting Abstracts MA2023-02, no. 64 (2023): 3237. http://dx.doi.org/10.1149/ma2023-02643237mtgabs.

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In this work we present the design of a novel technique for amplifying chlorine detection via a reusable microfluidics platform for use with electrochemical sensors. This platform enables experiments to be performed in hydrodynamic conditions, utilising convection as a secondary mode of mass transport for the analyte. All experiments have also been corroborated using COMSOL Multiphysics simulations. The platform is constructed using 3-D printing, which has been used for macroscale electrode microfluidics previously [1]. However, the sensors utilised herein are of the ultramicro scale with comp

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25

KUROKAWA, Junichi, Kenji IDO, and Hiromichi TAKAHASHI. "Feed-Forward Control of Pressure and Flowrate in Pumping System." Transactions of the Japan Society of Mechanical Engineers Series B 57, no. 537 (1991): 1707–11. http://dx.doi.org/10.1299/kikaib.57.1707.

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26

Pécora, Araí A. B., Leonardo Goldstein, Geraldo Lombardi, and Josmar D. Pagliuso. "New particulate solids pneumatic feeding device with mass flowrate control." Powder Technology 79, no. 3 (1994): 265–68. http://dx.doi.org/10.1016/0032-5910(94)02827-3.

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Hermawan, Yulius Deddy. "Design of Flow Control System with A Kickback Flow as A Manipulated Variable." Eksergi 14, no. 2 (2017): 23. http://dx.doi.org/10.31315/e.v14i2.2089.

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The open loop experiment of water flow dynamic in pipe has been done in laboratory. Pump was used to flow water in pipe. Part of liquid from discard of pump was recycled back to the suction of pump (kickback) and adjusted to control the liquid flow to the next process. The open loop laboratory experiment produced the steady state parameters; they were discard flowrate =16.6 [L/min], kickback flowrate =5.8 [L/min], and liquid flowrate to the next process =10.8 [L/min]. These steady state parameters were then used as the initial value for closed loop simulation with computer programming. This st

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Zhang, Chong, Tingting Xie, Kaixuan Tan, et al. "Hydrodynamic Simulation of the Influence of Injection Flowrate Regulation on In-Situ Leaching Range." Minerals 12, no. 7 (2022): 787. http://dx.doi.org/10.3390/min12070787.

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Reasonable control of the leaching range is one of the critical indicators of the in-situ leaching uranium mining process. However, there is currently no mature control technology. To verify and improve the current control technology of the leaching range in the industry, this work proposes an injection control mode for a small flow around the well-site and establishes a hydrodynamic model of the leaching range under eight different pumping and injection conditions by using the groundwater modeling system (GMS). The model calculation, range prediction, comparative analysis, and on-site SO42− a

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Adib, Ali Asghari, and David J. Hoelzle. "Hybrid Control of Flowrate in Microextrusion-Based Direct-Write Additive Manufacturing." IEEE Control Systems Letters 6 (2022): 97–102. http://dx.doi.org/10.1109/lcsys.2021.3049897.

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Chen, Yung-Hsu, Sheng-Chih Shen, Yan-Kuei Wu, Chun-Yen Lee, and Yen-Ju Chen. "Design and Testing of Real-Time Sensing System Used in Predicting the Leakage of Subsea Pipeline." Sensors 22, no. 18 (2022): 6846. http://dx.doi.org/10.3390/s22186846.

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This study integrates the array sensing module and the flow leakage algorithm. In this study, a real-time monitoring deep-sea pipeline damage sensing system is designed to provide decision-making parameters such as damage coordinates and damage area. The array sensor module is composed of multiple YF-S201 hall sensors and controllers. YF-S201 hall sensors are arranged inside the pipeline in an array. The flow signal in the deep-sea pipeline can be transmitted to the electronic control interface to analyze the leakage position and leakage flowrate of the pipeline. The theory of this system is b

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Meyer, J. W., and J. H. Bonin. "Performance and Flowrate Control of the Kinetic Extruder Coal Powder Pump." Journal of Engineering for Gas Turbines and Power 107, no. 3 (1985): 652–60. http://dx.doi.org/10.1115/1.3239785.

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The kinetic extruder is a novel centrifugal machine for feeding powdered material, in particular coal, against gas back pressure. The nonmechanical method of flow-rate control in the machine is described. Performance data obtained in tests of the kinetic extruder are presented and compared with theoretical predictions. It is found that a one-dimensional model of the material flow through the device gives accurate predictions of most aspects of the machine’s performance. However, some details of the limiting behavior evidently require a more refined analysis.

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Le, T. T., J. Watton, and D. T. Pham. "An artificial neural network based approach to fault diagnosis and classification of fluid power systems." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 211, no. 4 (1997): 307–17. http://dx.doi.org/10.1243/0959651971539830.

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In this paper, multilayer perceptron (MLP) type neural networks are used to detect leakages in an electrohydraulic cylinder drive. Both single-leakage and multiple-leakage type faults are investigated. The performance of MLPs is examined relating to the level of leakage flowrate and it was found that MLPs perform well for line leakages but for across-cylinder seal leakages they could only detect leakage over 1.01/min. The generalization tests on non-training leakage flowrate and working temperature are also included. A novel feature is the use of system state variables for network training, in

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Fitzpatrick, John, Franck Gloanec, Elisa Michel, Johanna Blondy, and Anais Lauzeral. "Application of Mathematical Modelling to Reducing and Minimising Energy Requirement for Oxygen Transfer in Batch Stirred Tank Bioreactors." ChemEngineering 3, no. 1 (2019): 14. http://dx.doi.org/10.3390/chemengineering3010014.

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In this study, microbial kinetic and oxygen transfer modelling coupled with energy analysis was applied to investigate how manipulation and control of agitator power input and air flowrate can reduce and minimise the total energy requirement in a batch aerobic bioprocess subject to constraints. The study showed that major energy savings can be made by appropriate selection of these variables and how they are controlled throughout a bioprocess. In many bioprocesses, the oxygen concentration in the liquid is controlled at a constant value. This may be achieved by maintaining the agitator power a

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Badarinath, Rakshith, and Vittaldas Prabhu. "Real-Time Sensing of Output Polymer Flow Temperature and Volumetric Flowrate in Fused Filament Fabrication Process." Materials 15, no. 2 (2022): 618. http://dx.doi.org/10.3390/ma15020618.

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In this paper we addressed key challenges in engineering an instrumentation system for sensing and signal processing for real-time estimation of two main process variables in the Fused-Filament-Fabrication process: (i) temperature of the polymer melt exiting the nozzle using a thermocouple; and (ii) polymer flowrate using extrusion width measurements in real-time, in-situ, using a microscope camera. We used a design of experiments approach to develop response surface models for two materials that enable accurate estimation of the polymer exit temperature as a function of polymer flowrate and l

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Zhou, Hua, and Wei Song. "Theoretical flowrate characteristics of the conjugated involute internal gear pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 4 (2012): 730–43. http://dx.doi.org/10.1177/0954406212454390.

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The aim of this article is to study the theoretical flowrate characteristics of the conjugated involute internal gear pump. The conjugated involute internal gear pump has a different internal gear, the profile of which is completely conjugated to that of pinion, from the conventional involute internal gear pump. To describe briefly, the former pump is called ‘conjugated pump’ while the latter pump ‘conventional pump’. This structure makes the conjugated pump have smaller volumes of trapped fluid than the conventional pump, which indicates the conjugated pump has a better flowrate performance.

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Harrell, R. C., G. A. Kranzler, and C. S. Hsu. "Adaptive Control of the Fluid Heat Exchange Process." Journal of Dynamic Systems, Measurement, and Control 109, no. 1 (1987): 49–52. http://dx.doi.org/10.1115/1.3143819.

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An adaptive algorithm for controlling the fluid heat exchange process via flowrate manipulation was presented. The algorithm utilized a model reference structure based on a linear time-variant approximation of the bilinear process dynamics. Adaptive feedforward and feedback compensation was provided. The control law was implemented on an evacuated tube solar water heating system. Experimental results demonstrated the ability of the adaptive scheme to accurately control collector fluid temperature under severe variations in solar insolation.

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Park, S.-H. "Development of a proportional poppet-type water hydraulic valve." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 9 (2009): 2099–107. http://dx.doi.org/10.1243/09544062jmes1380.

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To address the environmental problems and the safety of hydraulic systems, the development of novel water hydraulic systems using working fluids such as tap water are being developed successfully. In this study, we aim to develop a proportional water hydraulic valve using a proportional poppet as the main valve, which has an on—off function as well as a proportional function. The proposed proportional poppet-type water hydraulic valve has a simple structure with a control orifice that passes to the pilot orifice at both sides of the conventional poppet. Experiments verified that the relation b

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Ahmad, Saleh. "Model Predictive Control for the Flowrate Control Loop of the FESTO MPS PA Compact Workstation." Journal of Hunan University Natural Sciences 49, no. 1 (2022): 179–85. http://dx.doi.org/10.55463/issn.1674-2974.49.1.23.

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Model Predictive Control techniques offer favorable characteristics for the process control sector and have been used in industry since the 1980s. Some of the advantages of the Model Predictive Control techniques are that the process model can capture both static and dynamic interactions between input, output, and disturbance variables; the existing constraints on inputs and outputs are considered systematically, and the control calculations can be coordinated with the calculation of optimum set-points. This study aims to design and implement a Model Predictive controller for the flowrate cont

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Sritram, Piyawat, and Ratchaphon Suntivarakorn. "The Efficiency Comparison of Hydro Turbines for Micro Power Plant from Free Vortex." Energies 14, no. 23 (2021): 7961. http://dx.doi.org/10.3390/en14237961.

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In this research paper, the relationship between a crossflow turbine and propeller turbine size changes and the pond size in a free vortex power generation system was investigated. This relationship can be written in the form of a new mathematical equation using the principles of the response surface methodology (RSM) method. This study aimed to compare the efficiency of a crossflow turbine and propeller turbine to enhance a micro power plant from free vortex. The pond size in a micro power plant from free vortex was 1 m in diameter and 0.5 m in height with a 0.2 m outlet drain at the bottom.

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Naderi, Mohammad Moein, Ludovica Barilla, Jian Zhou, Ian Papautsky, and Zhangli Peng. "Elasto-Inertial Focusing Mechanisms of Particles in Shear-Thinning Viscoelastic Fluid in Rectangular Microchannels." Micromachines 13, no. 12 (2022): 2131. http://dx.doi.org/10.3390/mi13122131.

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Growth of the microfluidics field has triggered numerous advances in focusing and separating microparticles, with such systems rapidly finding applications in biomedical, chemical, and environmental fields. The use of shear-thinning viscoelastic fluids in microfluidic channels is leading to evolution of elasto-inertial focusing. Herein, we showed that the interplay between the elastic and shear-gradient lift forces, as well as the secondary flow transversal drag force that is caused by the non-zero second normal stress difference, lead to different particle focusing patterns in the elasto-iner

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Yaseen, Yaseen Kh, Ali H. Mhmood, Mohammed R. Subhi, Amer B. Rakan, and Hameed A. Mohammed. "Advanced Flowrate Control of Petroleum Products in Transportation: An Optimized Modified Model Reference PID Approach." Journal of Robotics and Control (JRC) 4, no. 5 (2023): 591–99. http://dx.doi.org/10.18196/jrc.v4i5.19177.

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Efficient flowrate control is paramount for the seamless operation and reliability of petroleum transportation systems, where precise control of fluid movement ensures not only operational efficiency but also safety and cost-effectiveness. The main aim of this paper is to develop a highly effective modified model reference PID controller, tailored to ensure optimal flowrate control of petroleum products throughout their transportation. Initially, the petrol transportation process is analyzed to establish a suitable mathematical model based on vital factors like pipeline diameter, length, and p

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Amda, Julfa Muhammad, Djiwo Harsono, and Sutanto. "SIMULASI OPERASI ABWR MENGGUNAKAN SOFTWARE DCS CENTUM VP BERBASIS DATA SIMULATOR ABWR IAEA." Jurnal Forum Nuklir 13, no. 3 (2020): 37. http://dx.doi.org/10.17146/jfn.2019.13.3.5042.

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SIMULASI OPERASI ABWR MENGGUNAKAN DCS CENTUM VP BERBASIS DATA SIMULATOR ABWR IAEA. Simulasi operasi ABWR yang dibuat adalah simulasi dari beberapa parameter pada ABWR menggunakan perangkat lunak DCS CENTUM VP. Parameter yang dikendalikan adalah Rod Position yang mempengaruhi parameter-parameter Dome Steam Temperature, Steam Flow from Core, Thermal Power, Average Fuel Temperature, Coolant Flowrate, Coolant Temperature, Coolant Quality, Turbine Governor Valve, Generator Power, Feedwater Flowrate, and Feedwater Temperature. Simulasi ini dibuat berdasarkan data yang diambil dari IAEA Simulator ABW

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Cherepanska, Irina, and Vladyslav Sadchenko. "AUTOMATED TECHNOLOGICAL COMPLEX OF HIGH-PRECISION FLOWRATES CONTROL OF CHEMICALLY ACTIVE LIQUIDS." Bulletin of Kyiv Polytechnic Institute. Series Instrument Making, no. 64(2) (December 24, 2022): 87–92. http://dx.doi.org/10.20535/1970.64(2).2022.270034.

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The article is devoted to the actual problem of real-time automated control of the chemically active substances consumption with high accuracy and quickness, which is an important task of modern industries characterized by flexibility and continuity of production, as well as being dangerous to human health and the environment. The importance of this issue is determined by the constantly growing requirements of the global market and international standards regarding product quality, efficiency and safety of production operations. Widely used control and consumption systems are often inefficient

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Nguyen, Q. H., and S. B. Choi. "Performance evaluation of a high-speed jetting dispenser actuated by a ring-type piezostack." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 6 (2009): 1401–13. http://dx.doi.org/10.1243/09544062jmes1134.

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This article presents performance results of a new type of jetting dispenser driven by a ring-type piezostack actuator. The proposed dispenser can provide a very small dispensing dot size of a low viscous adhesive, from 50 to 500 cp, at a high dispensing flowrate in semiconductor packaging processes. After describing the mechanism and operational principle of the dispenser, a mathematical model of the system is derived by considering behaviours of the piezostack, the actuating spring, the dispensing needle, and the adhesive fluid dynamics. In the modelling, a lumped parameter method is applied

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Keitaanniemi, O., T. Kujansivu, and A. Kaunonen. "Retention Measurement in Paper Machines and its Control Using Retention Aid Flowrate." IFAC Proceedings Volumes 20, no. 13 (1987): 85–92. http://dx.doi.org/10.1016/s1474-6670(17)55569-x.

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KOGAN, A., I. HODARA, and M. VANA. "Steam flowrate to solar cavity reactor—a simple measurement and control method." International Journal of Hydrogen Energy 16, no. 8 (1991): 531–34. http://dx.doi.org/10.1016/0360-3199(91)90151-8.

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Höfling, Thomas, Rüdiger Deibert, and Oliver Hecker. "Fault Detection of Flowrate and Temperature Control Loops using Estimated Parity Equations." IFAC Proceedings Volumes 28, no. 12 (1995): 193–98. http://dx.doi.org/10.1016/s1474-6670(17)45421-8.

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Izurieta, Eduardo M., Marisa N. Pedernera, and Eduardo López. "Dynamics and control of a parallel-plates reactor for ethanol steam reforming thermally coupled with catalytic ethanol combustion." Latin American Applied Research - An international journal 55, no. 1 (2025): 37–46. https://doi.org/10.52292/j.laar.2025.3465.

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This paper analyzes the design and open-loop and closed-loop dynamics of a compact heat-integrated milli-reactor feedback control system for hydrogen production through ethanol steam reforming. The steam reforming is thermally integrated with ethanol combustion in a parallel-plates reactor. The catalysts are washcoated on metal structures separated by metal sheets. The non-steady state is studied using a rigorous modeling of the reactor to characterize the dynamics and identify variables of interest for a control system. Disturbances are caused in temperatures and flowrates, and the outlet tem

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Viana, Sidney. "Sensitivity Analysis of Hydrocyclone Performance in Mineral Processing Using Monte Carlo Simulation." Journal of Applied Instrumentation and Control 5, no. 2 (2018): 9. http://dx.doi.org/10.3895/jaic.v5n2.5963.

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The hydrocyclone separator is a processing equipment very used in the mineral industry for size separation of solid particles in ore slurries. It is also an equipment with low concerns about its control for an efficient performance. Traditionally, the monitoring and control of hydrocyclone is done by means of its operational variables as the flowrate Q, the density r, and the pressure P of the feed slurry stream of the hydrocyclone. However, the main outcome variable of interest in a hydrocyclone is its “cut-off size”, d50, which is the size at which 50% of the solids particles, in average, go

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Iswahyudi, Andi, Pratondo Busono, Yaya Suryana, Anwar Mujadin, and Dwi Astharini. "Design and Implementation of Electronic Control System of Blood Pump for Hemodialysis Machine." JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI 3, no. 3 (2017): 150. http://dx.doi.org/10.36722/sst.v3i3.221.

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<p><em>A</em><em>bstract<strong> </strong></em><em>– </em><strong>t</strong><strong>here are three methods of renal therapies, hemodialysis is the primary choise. This is because of the cheaper price compared to the CAPD. In addition, people in indonesia are still not understand the CAPD method. However, there are still many problems in the therapy using hemodialysis machine. This research aims to develop and to know the performance of the electronic control system for blood pump to match the ideal flowrate that will be us

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