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Journal articles on the topic 'Reversible energy flows'

Author: Grafiati

Published: 1 June 2024

Last updated: 31 July 2025

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1

Zhao, Yang, Chi-Chiu Ma, Lai-Ho Wong, et al. "Quasi-Reversible Energy Flows in Carbon-Nanotube Oscillators." Journal of Computational and Theoretical Nanoscience 3, no. 5 (2006): 852–56. http://dx.doi.org/10.1166/jctn.2006.027.

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Devine, Sean. "Algorithmic Entropy and Landauer’s Principle Link Microscopic System Behaviour to the Thermodynamic Entropy." Entropy 20, no. 10 (2018): 798. http://dx.doi.org/10.3390/e20100798.

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Algorithmic information theory in conjunction with Landauer’s principle can quantify the cost of maintaining a reversible real-world computational system distant from equilibrium. As computational bits are conserved in an isolated reversible system, bit flows can be used to track the way a highly improbable configuration trends toward a highly probable equilibrium configuration. In an isolated reversible system, all microstates within a thermodynamic macrostate have the same algorithmic entropy. However, from a thermodynamic perspective, when these bits primarily specify stored energy states,

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3

Cartas-Fuentevilla, R., та A. Olvera-Santamaria. "Deforming the theory λϕ4 along the parameters and fields gradient flows". International Journal of Modern Physics A 30, № 02 (2015): 1550008. http://dx.doi.org/10.1142/s0217751x15500086.

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Considering the action for the theory λϕ4 for a massive scalar bosonic field as an entropy functional on the space of coupling constants and on the space of fields, we determine the gradient flows for the scalar field, the mass and the self-interaction parameter. When the flow parameter is identified with the energy scale, we show that there exist phase transitions between unbroken exact symmetry scenarios and spontaneous symmetry breaking scenarios at increasingly high energies. Since a nonlinear heat equation drives the scalar field through a reaction-diffusion process, in general the flows

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4

Attou, A., and L. Bolle. "Integral formulation of balance equations for two-phase flow through a sudden enlargement Part 1: Basic approach." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 211, no. 5 (1997): 387–97. http://dx.doi.org/10.1243/0954406971522132.

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A general expression of irreversible losses related to two-phase flows through a sudden enlargement is derived from basic balance equations (mass, momentum and energy). The need to take into account void fraction and quality changes is emphasized for some one-fluid flows. From a comparison with several experimental results, it is concluded that a void fraction decrease downstream of the enlargement must be considered in order to predict satisfactorily pressure variations on the basis of the momentum balance procedure. When expressed in the form of a fraction of reversible pressure recovery, di

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Salter, S. H., J. R. M. Taylor, and N. J. Caldwell. "Power conversion mechanisms for wave energy." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 216, no. 1 (2002): 1–27. http://dx.doi.org/10.1243/147509002320382103.

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It is easy to make a device that will respond vigorously to the action of sea waves. Indeed, it is quite hard to make one that will not. However, the conversion of the slow, random, reversing energy flows with very high extreme values into phase-locked synchronous electricity with power quality acceptable to a utility network is very much harder. This paper describes a range of different control strategies of varying degrees of sophistication and then describes possible conversion equipment for high-pressure oil and water and low-pressure air. Like many renewable energy sources, waves would be

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6

Devine, Sean. "Landauer’s Principle a Consequence of Bit Flows, Given Stirling’s Approximation." Entropy 23, no. 10 (2021): 1288. http://dx.doi.org/10.3390/e23101288.

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According to Landauer’s principle, at least kBln2T Joules are needed to erase a bit that stores information in a thermodynamic system at temperature T. However, the arguments for the principle rely on a regime where the equipartition principle holds. This paper, by exploring a simple model of a thermodynamic system using algorithmic information theory, shows the energy cost of transferring a bit, or restoring the original state, is kBln2T Joules for a reversible system. The principle is a direct consequence of the statistics required to allocate energy between stored energy states and thermal

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Oleh, Pihnastyi, Ivanovska Olha, and O. Sobol M. "Synthesis of the algorithm for the flow parameters optimal control of the reversible conveyor." Radio Electronics, Computer Science, Control 2022(2) (July 4, 2022): 210–21. https://doi.org/10.5281/zenodo.6941626.

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Context.  The problem of optimal control of flow parameters of a conveyor-type transport system containing sections with reversible conveyors is considered. The object of the stady was an analytical model of a reversible transport conveyor for synthesizing an algorithm for optimal control of the flow parameters of a reversible transport conveyor.   Objective.  The goal of the work is to develop a synthesis technique for an algorithm for optimal control of the flow parameters of a reversible transport conveyor based on an analytical model of a conveyor section containing a transp

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Glagolev, Vadim V., Viktor V. Kozlov, and Aleksey A. Markin. "Conditions for the reversible deformation of planar bodies weakened by a cut." Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika, no. 94 (2025): 136–48. https://doi.org/10.17223/19988621/94/11.

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The body deformation in terms of a planar layer weakened by a cut is considered. As the radius of curvature of the cut tends to zero at the maximum free-energy point, the cut transforms into a mathematical cut. The use of classical conditions for determining the elastic limit leads to the formation of plastic regions under an arbitrarily small external load. To solve this problem, the free energy flow through a cutout arc section is introduced as the product of the free energy density at the point of its maximum and a linear parameter. The free energy flow is represented by the sum of the volu

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9

Peters, Michael H. "Nonequilibrium Entropy Conservation and the Transport Equations of Mass, Momentum, and Energy." Energies 14, no. 8 (2021): 2196. http://dx.doi.org/10.3390/en14082196.

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Nonequilibrium statistical mechanics or molecular theory has put the transport equations of mass, momentum and energy on a firm or rigorous theoretical foundation that has played a critical role in their use and applications. Here, it is shown that those methods can be extended to nonequilibrium entropy conservation. As already known, the “closure” of the transport equations leads to the theory underlying the phenomenological laws, including Fick’s Law of Diffusion, Newton’s Law of Viscosity, and Fourier’s Law of Heat. In the case of entropy, closure leads to the relationship of entropy flux t

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10

Tiwari, Ravi Nath, Alberto Traverso, and Federico Reggio. "Performance assessment of a reversible Tesla machine." E3S Web of Conferences 414 (2023): 03002. http://dx.doi.org/10.1051/e3sconf/202341403002.

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It is well known that bladeless or Tesla turbomachinery, which was invented by Nikola Tesla in 1913, has several distinct features, such as reversibility of operation, which includes expander as well as compressor operation, just by reversing the rotational speed, provided that the statoric channels are purposely designed. Despite their potential application to a variety of fields, such as energy harvesting, automotive, light aircraft, and food processing, especially for low volumetric flows, Tesla machines have not found yet a specific market niche. In fact, at small size, it is estimated tha

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11

Jesudason, Christopher G. "Simulation Algorithm That Conserves Energy and Momentum for Molecular Dynamics of Systems Driven by Switching Potentials." Mathematical Problems in Engineering 2009 (2009): 1–14. http://dx.doi.org/10.1155/2009/215815.

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Whenever there exists a crossover from one potential to another, computational problems are introduced in Molecular Dynamics (MD) simulation. These problem are overcome here by an algorithm, described in detail. The algorithm is applied to a 2-body particle potential for a hysteresis loop reaction model. Extreme temperature conditions were applied to test for algorithm effectiveness by monitoring global energy, pressure and temperature discrepancies in an equilibrium system. No net rate of energy and other flows within experimental error should be observed, in addition to invariance of tempera

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12

Bratianu, Constantin, and Ruxandra Bejinaru. "The Theory of Knowledge Fields: A Thermodynamics Approach." Systems 7, no. 2 (2019): 20. http://dx.doi.org/10.3390/systems7020020.

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The emergence of knowledge economy and knowledge management revealed the need for reconsidering the concept of knowledge in a larger framework than that created by philosophers from ancient times. While the epistemology as a theory of knowledge and justification considers knowledge as a justified true belief, experts in knowledge management consider knowledge as a strategic resource. The new economic interpretation of knowledge as a strategic resource and a key contributor to achieving a competitive advantage generated a search of new metaphors to supply the attributes needed in constructing t

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VENAYAGAMOORTHY, SUBHAS K., and DEREK D. STRETCH. "On the turbulent Prandtl number in homogeneous stably stratified turbulence." Journal of Fluid Mechanics 644 (February 10, 2010): 359–69. http://dx.doi.org/10.1017/s002211200999293x.

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In this paper, we derive a general relationship for the turbulent Prandtl number Prt for homogeneous stably stratified turbulence from the turbulent kinetic energy and scalar variance equations. A formulation for the turbulent Prandtl number, Prt, is developed in terms of a mixing length scale LM and an overturning length scale LE, the ratio of the mechanical (turbulent kinetic energy) decay time scale TL to scalar decay time scale Tρ and the gradient Richardson number Ri. We show that our formulation for Prt is appropriate even for non-stationary (developing) stratified flows, since it does n

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Abanades, Stéphane. "A Review of Oxygen Carrier Materials and Related Thermochemical Redox Processes for Concentrating Solar Thermal Applications." Materials 16, no. 9 (2023): 3582. http://dx.doi.org/10.3390/ma16093582.

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Redox materials have been investigated for various thermochemical processing applications including solar fuel production (hydrogen, syngas), ammonia synthesis, thermochemical energy storage, and air separation/oxygen pumping, while involving concentrated solar energy as the high-temperature process heat source for solid–gas reactions. Accordingly, these materials can be processed in two-step redox cycles for thermochemical fuel production from H2O and CO2 splitting. In such cycles, the metal oxide is first thermally reduced when heated under concentrated solar energy. Then, the reduced materi

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15

Anokhina, E. А., and А. V. Timoshenko. "SYNTHESIS OF THE THERMALLY COUPLED DISTILLATION SEQUENCES." Fine Chemical Technologies 12, no. 6 (2017): 46–70. http://dx.doi.org/10.32362/2410-6593-2017-12-6-46-70.

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Approaching a hypothetical thermodynamically reversible process is one of the main directions of energy saving in distillation. In practice, this is achieved by the use of systems with coupled thermal and material flows (STMP). Such systems have long been used in the separation of zeotropic mixtures. As follows from the analysis of literature data, they save energy costs by up to 30%. Recently, it has been revealed that the use of such systems is possible, expedient and energetically advantageous for separating the close-boiling and azeotropic mixtures by extractive distillation (ED). The arti

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Prudnikov, Nikita, Sergey Malakhov, Vsevolod Kulagin, et al. "Multi-Terminal Nonwoven Stochastic Memristive Devices Based on Polyamide-6 and Polyaniline for Neuromorphic Computing." Biomimetics 8, no. 2 (2023): 189. http://dx.doi.org/10.3390/biomimetics8020189.

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Reservoir computing systems are promising for application in bio-inspired neuromorphic networks as they allow the considerable reduction of training energy and time costs as well as an overall system complexity. Conductive three-dimensional structures with the ability of reversible resistive switching are intensively developed to be applied in such systems. Nonwoven conductive materials, due to their stochasticity, flexibility and possibility of large-scale production, seem promising for this task. In this work, fabrication of a conductive 3D material by polyaniline synthesis on a polyamide-6

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Serkov, Aleksandr, Vitalii Breslavets, Juliya Breslavets, Igor Yakovenko, and Irina Yatsenko. "INFLUENCE OF PULSE ELECTROMAGNETIC RADIATION ON PERFORMANCE OF ELECTRIC RADIO PRODUCTS." Системи управління, навігації та зв’язку. Збірник наукових праць 1, no. 75 (2024): 201–5. http://dx.doi.org/10.26906/sunz.2024.1.201.

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The subject matter is the processes of analysis of the occurrence of reversible and irreversible failures of semiconductor devices under conditions of exposure to electromagnetic radiation. It is shown that the influence of pulsed electromagnetic radiation is accompanied by the emergence of currents in the conductive elements of products and the emergence of their internal fields. The mechanisms for the occurrence of instabilities of natural oscillations of semiconductor components of electrical and radio products, caused by their interaction with flows of charged particles, have been determin

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18

Diebner, Hans H. "On the Entropy Flow between Parts of Multi-component Systems, Partial Entropies and the Implications for Observations." Zeitschrift für Naturforschung A 55, no. 3-4 (2000): 405–11. http://dx.doi.org/10.1515/zna-2000-3-406.

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Abstract The concept of the time dependent instantaneously occupied phase space volume is applied to multi-component systems. It allows for the investigation of entropy flows betweeen the components of the system and the evaluation of partial entropies assigned to the subsystems. We give numerical examples by means of molecular dynamics simulations of a 100-particle gas. Using a symplectic exactly reversible algorithm, a consistent and reliable evalutation of energy and entropy exchanges as well as the intake of work is achieved. The entropy flow which is related to an information flow is link

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Kagdin, V. N., R. A. Maleyev, A. N. Zimin, S. M. Zuyev, and D. R. Yakhutl'. "Starter-generator sets of modern vehicles." Izvestiya MGTU MAMI 15, no. 4 (2021): 27–32. http://dx.doi.org/10.31992/2074-0530-2021-50-4-27-32.

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This article describes the purpose and applications of the starter generator set. The modes of operation of a starter-generator set are considered both as a sequential excitation direct current electric motor, which rotates the shaft of an internal combustion engine, and as a generator, when an electric machine operates as a direct current source of independent excitation, supplying power to electric control circuits, electric motors of auxiliary electrical equipment, lighting and battery charging. Additional functions of a starter-generator set in the form of a start-stop system, regenerative

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20

Stobart, R. K. "An availability approach to thermal energy recovery in vehicles." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 221, no. 9 (2007): 1107–24. http://dx.doi.org/10.1243/09544070jauto463.

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Availability is a well-established and widely recognized way of describing the work-producing potential of energy systems. A first-law analysis is helpful in setting the energy context and ensuring that energy flows balance, but it is a second-law analysis based on availability that places an upper bound on the potential work output. In this analysis a new approach to thermal management intended for vehicle propulsion is examined and developed. Starting with a simple analysis of the chemical energy flow, a realistic heat exchange performance is introduced to establish a practical architecture.

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Zschunke, F., R. Rivas, and P. O. Brunn. "Temperature Behavior of Magnetorheological Fluids." Applied Rheology 15, no. 2 (2005): 116–21. http://dx.doi.org/10.1515/arh-2005-0007.

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AbstractMagnetorheological fluids (MRFs) show a high but reversible rise of the viscosity upon application of an external magnetic field. This effect can be utilized in controllable friction dampers where the MR fluid flows through a gap with a adjustable magnetic field. The change in the magnitude of the magnetic field leads to a change of the viscosity of the fluid which in turn effects the pressure drop in the system. So the damping force can be controlled by the magnitude of the external magnetic field. This energy dissipation leads to a rise of the damper temperature. For designing those

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Ghalambaz, Mohammad, Seyed Abdollah Mansouri Mehryan, Kasra Ayoubi Ayoubloo, et al. "Thermal Energy Storage and Heat Transfer of Nano-Enhanced Phase Change Material (NePCM) in a Shell and Tube Thermal Energy Storage (TES) Unit with a Partial Layer of Eccentric Copper Foam." Molecules 26, no. 5 (2021): 1491. http://dx.doi.org/10.3390/molecules26051491.

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Thermal energy storage units conventionally have the drawback of slow charging response. Thus, heat transfer enhancement techniques are required to reduce charging time. Using nanoadditives is a promising approach to enhance the heat transfer and energy storage response time of materials that store heat by undergoing a reversible phase change, so-called phase change materials. In the present study, a combination of such materials enhanced with the addition of nanometer-scale graphene oxide particles (called nano-enhanced phase change materials) and a layer of a copper foam is proposed to impro

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Stevanovic, Dragan, Judith Schimmel, Tarek Philippi, Christian Kutter, Goran Jankes, and Vuk Adzic. "Hydrogen production by thermal cracking of natural gas - test facility." Thermal Science, no. 00 (2024): 142. http://dx.doi.org/10.2298/tsci230426142s.

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Hydrogen is an energy carrier which makes a decisive contribution for future energy transition. Over 90% of Hydrogen is produced currently from primary fossil fuels with high CO2-emissions. Methane cracking is intensively developing, as the storage or using of solid carbon is easier and more attractive than Carbon Capture & Storage (CCS). The process without catalysts is simpler, but requires higher temperatures. Main objective of the test was to show the viability for industrial applications. The test facility consists of two columns (for reversible operation) filled with pebble-bed and a

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Schmidt-Böcking, Horst Werner, Gerhard Luther, Michael Düren, et al. "Renewable Electric Energy Storage Systems by Storage Spheres on the Seabed of Deep Lakes or Oceans." Energies 17, no. 1 (2023): 73. http://dx.doi.org/10.3390/en17010073.

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This paper describes a new underwater pumped storage hydropower concept (U.PSH) that can store electric energy by using the high water pressure on the seabed or in deep lakes to accomplish the energy transition from fossil to renewable sources. Conventional PSH basically consists of two storage reservoirs (upper and lower lake) at different topographical heights. It needs special topographic conditions, which are only limitedly available in mountain regions. Furthermore, due to the lack of acceptance and the environmental impact, new conventional PSH projects are very unlikely to be built in l

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Baranchuk, Kyrylo, and Oleksandr Chechuga. "OVERVIEW OF MODERN ARCHITECTURES OF BIDIRECTIONAL HEATING SUBSTATION IN DISTRICT HEATING SYSTEMS ON TRANSPORT INFRASTRUCTURE FACILITIES." Automobile Roads and Road Construction, no. 118.1 (2025): 044–54. https://doi.org/10.33744/0365-8171-2025-117.1-044-054.

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Summary. Modern systems of district heating of the fourth (4GDH) and district heating and cooling of the fifth (5GDHC) generations increasingly integrate renewable energy sources (RES) and waste heat, while changing the role of consumers to active “thermal prosumers”. The key element of such two-way interaction between the network and the building is a bidirectional heating substation, which provides both heat withdrawal from the network and the return of excess energy. The article is devoted to a review of modern architectures of bidirectional heating substation in the context of 4GDH and 5GD

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Nadaždi, Ana, Aleksandra Parezanović, Zorana Petojević, and Zorana Naunović. "Urban mining potential in Serbia: Case study of residential building material stock." Gradjevinski materijali i konstrukcije 65, no. 3 (2022): 85–91. http://dx.doi.org/10.5937/grmk2203085n.

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As governments worldwide attempt to develop sustainable waste management strategies, massive amounts of waste have been accumulating. However, developing an effective waste management strategy requires a thorough understanding of waste types and quantites. The existing efforts to identify waste flows in the built environment are unsuitable for countries with non-reliable statistics as they mostly use location-specific parameters such as data on construction, renovation, demolition activity, and generation rates from the literature. The types and quantities of materials embedded are rarely cons

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Belliardi, Marco, Nerio Cereghetti, Paola Caputo, and Simone Ferrari. "A Method to Analyze the Performance of Geocooling Systems with Borehole Heat Exchangers. Results in a Monitored Residential Building in Southern Alps." Energies 14, no. 21 (2021): 7407. http://dx.doi.org/10.3390/en14217407.

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Geothermal heat is an increasingly adopted source for satisfying all thermal purposes in buildings by reversible heat pumps (HP). However, for residential buildings located in moderate climates, geocooling, that implies the use of geothermal source for cooling buildings without the operation of HP, is an efficient alternative for space cooling not yet explored enough. Geocooling allows two main benefits: to cool the buildings by high energy efficiencies improving summer comfort; to recharge the ground if space heating is provided by HP exploiting the geothermal source (GSHP). In these cases, g

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Saarinen, Ville, Jari Pennanen, Jeremias Hopsu, and Olli Himanen. "Utilization of Hydrogen as an Energy Storage Vector by a Combined Reversible High Temperature Electrolysis and Compressor System Integrated with Upstream Biogas and Downstream E-Fuel Production." ECS Meeting Abstracts MA2025-01, no. 4 (2025): 510. https://doi.org/10.1149/ma2025-014510mtgabs.

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Current predictions towards a hydrogen society and the extensive use of hydrogen as a large-scale energy storage vector are emerging from the intermittent nature of renewable energy sources, especially wind and solar. The key issues to make these new solutions based on clean energy techno-economically viable are versatility, quick response time to changes in the price of electricity and high system efficiency compared to established technologies. Also, options such as the utilization (and capture) of CO2 and biogas would be desirable features to be connected to the future energy systems. When

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Kaganovich, Boris M., Valery A. Stennikov, Maxim S. Zarodnyuk, and Sergey V. Yakshin. "Conventional Hydraulic Circuits in an Analysis of Environmental Issues." E3S Web of Conferences 69 (2018): 02003. http://dx.doi.org/10.1051/e3sconf/20186902003.

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The paper addresses the problems of conventional circuit modeling in an analysis of anthropogenic pollution of nature. A joint use of two types of models is proposed: 1) a model of conventional hydraulic circuits and 2) a model of extreme intermediate states developed by Melentiev Energy Systems Institute. The first model is used to calculate the distribution of pollutants in the atmosphere and their precipitation. The second model is intended for an analysis of the formation of pollutants and their transformations in branches as a result of chemical reactions and phase transitions. The analys

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Pauluis, Olivier. "Sources and Sinks of Available Potential Energy in a Moist Atmosphere." Journal of the Atmospheric Sciences 64, no. 7 (2007): 2627–41. http://dx.doi.org/10.1175/jas3937.1.

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Abstract Available potential energy (APE) is defined as the difference between the total static energy of the atmosphere and that of a reference state that minimizes the total static energy after a sequence of reversible adiabatic transformations. Determining the rate at which APE is generated in the atmosphere allows one to estimate the amount of kinetic energy that can be generated by atmosphere flows. Previous expressions for the sources and sinks of APE rely on a dry framework and are limited by the fact that they require prior knowledge of the distribution of latent heat release by atmosp

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Gavrilyuk, Sergey. "‘Uncertainty’ principle in two fluid–mechanics." ESAIM: Proceedings and Surveys 69 (2020): 47–55. http://dx.doi.org/10.1051/proc/202069047.

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Hamilton’s principle (or principle of stationary action) is one of the basic modelling tools in finite-degree-of-freedom mechanics. It states that the reversible motion of mechanical systems is completely determined by the corresponding Lagrangian which is the difference between kinetic and potential energy of our system. The governing equations are the Euler-Lagrange equations for Hamil- ton’s action. Hamilton’s principle can be naturally extended to both one-velocity and multi-velocity continuum mechanics (infinite-degree-of-freedom systems). In particular, the motion of multi–velocity conti

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Indra, Ida Bagus Puspa, I. Made Anom Adiaksa, and Gusti Ngurah Ardana. "EXPERIMENTAL STUDY OF THE EFFECT OF REACTOR TEMPERATURE RECONSTRUCTION ON FUEL CONSUMPTION AND DISTILLATE QUANTITY." Logic : Jurnal Rancang Bangun dan Teknologi 22, no. 2 (2022): 174–78. http://dx.doi.org/10.31940/logic.v22i2.174-178.

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Temperature is a measure or degree of hotness or coldness of an object or system which is defined as a physical quantity that is divided between two or more objects that are in thermal equilibrium. The second law of thermodynamics states that there is no reversible process in which heat flows naturally from a high-temperature object to a low-temperature object, and not vice versa. Heat is energy that is transferred due to a temperature difference. This heat transfer always occurs and the process stops until thermal equilibrium occurs. In a high temperature distillation column, the distillate f

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Orro, Alfonso, Margarita Novales, Ángel Monteagudo, José-Benito Pérez-López, and Miguel R. Bugarín. "Impact on City Bus Transit Services of the COVID–19 Lockdown and Return to the New Normal: The Case of A Coruña (Spain)." Sustainability 12, no. 17 (2020): 7206. http://dx.doi.org/10.3390/su12177206.

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The COVID–19 pandemic led to restrictions on activities and mobility in many parts of the world. After the main peak of the crisis, restrictions were gradually removed, returning to a new normal situation. This process has impacted urban mobility. The limited information on the new normal situation shows changes that can be permanent or reversible. The impact on the diverse urban transport modes varies. This study analyzes the changes in transit ridership by line, the use of stops, the main origin–destination flows, changes in transit supply, operation time, and reliability of the city bus net

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Banwart, Steven A., Nikolaos P. Nikolaidis, Yong-Guan Zhu, Caroline L. Peacock, and Donald L. Sparks. "Soil Functions: Connecting Earth's Critical Zone." Annual Review of Earth and Planetary Sciences 47, no. 1 (2019): 333–59. http://dx.doi.org/10.1146/annurev-earth-063016-020544.

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Soil is the central interface of Earth's critical zone—the planetary surface layer extending from unaltered bedrock to the vegetation canopy—and is under intense pressure from human demand for biomass, water, and food resources. Soil functions are flows and transformations of mass, energy, and genetic information that connect soil to the wider critical zone, transmitting the impacts of human activity at the land surface and providing a control point for beneficial human intervention. Soil functions are manifest during bedrock weathering and, in fully developed soil profiles, correlate with the

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Nazeer, M., M. I. Khan, S. Kadry, et al. "Regular perturbation solution of Couette flow (non-Newtonian) between two parallel porous plates: a numerical analysis with irreversibility." Applied Mathematics and Mechanics 42, no. 1 (2020): 127–42. http://dx.doi.org/10.1007/s10483-021-2677-9.

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AbstractThe unavailability of wasted energy due to the irreversibility in the process is called the entropy generation. An irreversible process is a process in which the entropy of the system is increased. The second law of thermodynamics is used to define whether the given system is reversible or irreversible. Here, our focus is how to reduce the entropy of the system and maximize the capability of the system. There are many methods for maximizing the capacity of heat transport. The constant pressure gradient or motion of the wall can be used to increase the heat transfer rate and minimize th

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Jimenez-Martín, Gonzalo, Xabier Judez, Mónica Aguado, and Iñigo Garbayo. "Exploring Solid Oxide Electrolysis Cell Design for an Optimal Flow Distribution and Thermal Management." ECS Meeting Abstracts MA2023-01, no. 54 (2023): 167. http://dx.doi.org/10.1149/ma2023-0154167mtgabs.

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Climate crisis and the subsequent increase of fossil fuels prices have encouraged the search for alternative and renewable energy sources. In this scenario, the use of hydrogen as green energy carrier is nowadays regarded as one of the keys to achieve the transition to a fully renewable energy system. Among the existent and commercial technologies to produce green hydrogen, solid oxide electrolysis (SOE) outstands due to their high efficiency and the possibility of operate in reversible mode, i.e on electrolysis mode to produce hydrogen and on fuel cell mode (SOFC) to generate power from store

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Yun, Ariyeong, Seongmo Ahn, and Hye Ryung Byon. "Stepwise Two Electron-Transfer Processes of Naphthalene Diimide As the Soluble Negolyte and Solid Storage in Redox Target Flow Batteries." ECS Meeting Abstracts MA2024-02, no. 9 (2024): 1271. https://doi.org/10.1149/ma2024-0291271mtgabs.

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Organic redox flow batteries (RFBs) have emerged as promising energy storage systems linked to intermittent renewable energy sources. The organic redox-active molecules serve as the negolyte and posolyte (active negative and positive active electrolyte, respectively) and have developed to tune redox potential, capacity, and stability. This RFB offers potentially lower costs than vanadium RFBs due to the rising vanadium expense. Nonetheless, the capacity of organic RFBs has been limited by 0.5~2 M due to the limited solubility of organic molecules and increased viscosity, resulting in restricte

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Thosar, Yug Milind. "Design and FPGA Implementation of a 4-Bit ALU Using Reversible Logic Gates." International Journal for Research in Applied Science and Engineering Technology 13, no. 6 (2025): 1299–306. https://doi.org/10.22214/ijraset.2025.72366.

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Reversible computing offers a promising approach to mitigate the power dissipation challenges inherent in conventional digital systems. In this work, we present the design and analysis of a novel 4-bit reversible Arithmetic Logic Unit (ALU) that leverages reversible logic gates—including Fredkin, Feynman, Universal Reversible Gate (URG), and ThapliyalSrinivas Gate (TSG)—to perform a suite of fundamental arithmetic and logical operations. The ALU is architected to execute operations such as binary addition, subtraction, logical AND, OR, and NOT under a unified reversible computing framework, th

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Yan, Aibin, Runqi Liu, Zhengfeng Huang, Patrick Girard, and Xiaoqing Wen. "Designs of Level-Sensitive T Flip-Flops and Polar Encoders Based on Two XOR/XNOR Gates." Electronics 11, no. 10 (2022): 1658. http://dx.doi.org/10.3390/electronics11101658.

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Quantum-dot cellular automata is a novel nanotechnology that has the advantages of low energy dissipation, easy integration, and high computing speed. It is regarded as one of the powerful alternative technologies for the next generation of integrated circuits because of its unique implementation concept. In this paper, two XOR/XNOR gates are proposed. Level-sensitive T flip-flops, negative edge-trigger T flip-flops, two-to-one multiplexers, reversible gates, and (8, 4) polar encoders are implemented based on these two proposed logic gates. Simulation results show that, compared with the exist

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Esquivel-Sancho, Luis Miguel, Mauricio Muñoz-Arias, Hayden Phillips-Brenes, and Roberto Pereira-Arroyo. "A Reversible Hydropump–Turbine System." Applied Sciences 12, no. 18 (2022): 9086. http://dx.doi.org/10.3390/app12189086.

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Water-pumped storage systems have become an ideal alternative to regulate the intermittent power delivered by renewable energy sources. For small-scale operations, a type of centrifugal pump coupled to asynchronous machines represents an adequate solution due to their techno-economic feasibility in addition to their ability to operate as reversible systems. This work provides a novel port-Hamiltonian modelling approach to an integrated reversible hydropump–turbine system, that can be switched from motor pump to turbine-generator by employing a conventional hydraulic switch. Our modelling strat

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Serkov, А., V. Breslavets, Yu Breslavets, and I. Yakovenko. "INFLUENCE OF ELECTROMAGNETIC RADIATION ON RESISTANCE OF SEMICONDUCTOR DEVICES." Системи управління, навігації та зв’язку. Збірник наукових праць 1, no. 71 (2023): 177–81. http://dx.doi.org/10.26906/sunz.2023.1.177.

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The subject matter is the processes of analysis and mechanisms of appearance of instabilities of natural vibrations of semiconductor structures., due to their interaction with flows of charged particles under the influence of external electromagnetic radiation. It is shown that the influence of pulsed electromagnetic radiation is accompanied by the appearance of currents in the conductive elements of products that are capable of exciting natural oscillations of semiconductor components and are the cause of failures of radio products. The aim is to develop the theory of collisionless damping of

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Vahabi, Mohsen, Pavel Lyakhov, Ali Newaz Bahar, Akira Otsuki, and Khan A. Wahid. "Novel Reversible Comparator Design in Quantum Dot-Cellular Automata with Power Dissipation Analysis." Applied Sciences 12, no. 15 (2022): 7846. http://dx.doi.org/10.3390/app12157846.

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In very large-scale integration (VLSI) circuits, a partial of energy lost leads to information loss in irreversible computing because, in conventional combinatorial circuits, each bit of information generates heat and power consumption, thus resulting in energy dissipation. When information is lost in conventional circuits, it will not be recoverable, as a result, the circuits are provided based on the reversible logic and according to reversible gates for data retrieval. Since comparators are one of the basic building blocks in digital logic design, in which they compare two numbers, the aim

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Mukhopadhyay, Debarka, and Paramartha Dutta. "A study on energy optimized 4 dot 2 electron two dimensional quantum dot cellular automata logical reversible flip-flops." Microelectronics Journal 46, no. 6 (2015): 519–30. http://dx.doi.org/10.1016/j.mejo.2015.03.001.

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Baktiyar, Moch Hanif, Anggita Adiningrum, Fatin Septianingsih, and Bambang Poerwadi. "Utilization of Methylene Blue and Banana Peels as RFB Components (Redox Flow Battery)." Rekayasa Bahan Alam dan Energi Berkelanjutan 5, no. 1 (2021): 10–16. http://dx.doi.org/10.21776/ub.rbaet.2021.005.01.02.

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RFB (Redox Flow Battery) is a secondary battery that provides energy conversion between chemistry and electricity through an alternating redox reaction by 2 pairs of electrons and protons. RFB with active ingredient Vanadium (VRB) is a type of RFB that is widely used and has problems such as the price of Vanadium is expensive, is toxic and the solvent (H2SO4) is corrosive. Therefore, an inexpensive and environmentally friendly organic electrolyte component emerged, namely Methylene Blue and banana peels. Methylene Blue has 2 electron-proton pairs which provide a reversible redox reaction and h

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Navalpotro, Paula, Jesus Palma, Marc Anderson, and Rebeca Marcilla. "A Membrane-Free Redox Flow Battery with Two Immiscible Redox." Angewandte Chemie International Edition 57, no. 15 (2017): 3853. https://doi.org/10.1002/anie.201704318.

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Flexible and scalable energy storage solutions are necessary for mitigating fluctuations of renewable energy sources. The main advantage of redox flow batteries is their ability to decouple power and energy. However, they present some limitations including poor performance, short-lifetimes, and expensive ion-selective membranes as well as high price, toxicity, and scarcity of vanadium compounds. We report a membrane-free battery that relies on the immiscibility of redox electrolytes and where vanadium is replaced by organic molecules. We show that the biphasic system formed by one acidic solut

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Judez, Xabier, Gonzalo Jimenez-Martín, Mónica Aguado, and Iñigo Garbayo. "Approaches for Optimum Thermal Management of SOFC Cells: Fitting Operating Conditions & Smart Cell Design." ECS Meeting Abstracts MA2023-01, no. 54 (2023): 100. http://dx.doi.org/10.1149/ma2023-0154100mtgabs.

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The thrust of green hydrogen as energy vector for the consolidation of a net-zero emitting global energy system implies the necessity of a fast development of high performing and highly efficient fuel cells and electrolyzers. Among the commercial choices, solid oxide cells can be considered as a better performing alternative compared to commercial proton exchange membrane and alkaline technologies. The benefits of this kind of technology arise from their higher operating temperatures of around 700-900 ºC, which results in improved kinetics and favored thermodynamics, allowing to reach unrivale

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Dongellini, Matteo, Christian Natale, Claudia Naldi, Eugenia Rossi di Schio, Paolo Valdiserri, and Gian Luca Morini. "Energy and Environmental Performance Comparison of Heat Pump Systems Working with Alternative Refrigerants." Applied Sciences 13, no. 12 (2023): 7238. http://dx.doi.org/10.3390/app13127238.

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The European Parliament has imposed to reduce by 2030 whole HFC emissions by at least two-thirds with respect to 2014 levels. With the aim of contributing to determine the energy and environmental advantages of refrigerants alternative to R-410A, this paper reports the results of a numerical study focused on an HVAC system coupled to a residential building and based on a reversible electric heat pump. In particular, two heat pump typologies are considered: an air-source and a ground-source heat pump, both operating with the two refrigerants R-410A and R-454B. The environmental performance of t

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Shapoval, O., N. Chepurna, and M. Kirichenko. "An analysis of effectiveness of air heat pump operation dependent on change of external air temperature." Ventilation, Illumination and Heat Gas Supply 37 (April 1, 2021): 24–30. http://dx.doi.org/10.32347/2409-2606.2021.37.24-30.

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Currently, air-to-water heat pumps are more widely used, which due to the high coefficient of performance reduce energy consumption and negative impact on the environment. They decrease the dependency on costs of energy resources. The work is devoted to solving the urgent problem of improving the efficiency of air heat pumps at low temperature of outdoor air in winter. One of the main problems of an air heat pump is the reduction of productivity when the outdoor air temperature decreases in winter. In this paper, the effectiveness of LG Therma V air-to-water heat pump to provide apartments wit

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Zhang, Ping, YiMin Xuan, and Qiang Li. "A high-precision instrumentation of measuring thermal contact resistance using reversible heat flux." Experimental Thermal and Fluid Science 54 (April 2014): 204–11. http://dx.doi.org/10.1016/j.expthermflusci.2013.12.012.

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Zhang, Jingyu, Baolu Wang, Gang Li, and Huilan Huang. "Thermal and electrical performances of PV/T system based on reversible thermochromic coating." Applied Thermal Engineering 234 (November 2023): 121358. http://dx.doi.org/10.1016/j.applthermaleng.2023.121358.

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