Approaches of finite-time thermodynamics in conceptual design of heat exchange systems
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Ivan Sukin
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Alexandr Mazikov
Abstract
Authors give a review of the methods of finite-time thermodynamics in problems of obtaining the limiting capabilities of two- and multi-flow heat exchange systems. The boundaries of their physical reachability are constructed. The case of flows with changing heat capacity and, in particular, flows with a change in phase state is considered. The conditions for minimum heat exchange dissipation are obtained for different kinetics at fixed heat transfer coefficient and heat load. The concept of thermodynamically equivalent heat exchange systems is introduced and a method for transition from a multi-flow system to an equivalent two-flow heat exchanger in which heat capacities of the flows depend on temperature is proposed. Based on the obtained results, an algorithm for synthesis of multi-flow heat exchange systems is proposed. The synthesis takes into account the limitations on the temperatures of all or part of the flows. The synthesis of the system involves the calculation and minimization of the number of two-flow heat exchangers and the selection of the contact structure, the values of flow parameters, the distribution of contact surfaces and heat loads between two-flow heat exchange cells. In the design procedure the limitations on the temperatures of all or part of the flows are taken into account. Using thermodynamic criteria instead of technical and economic ones allows us to radically simplify the problem of designin the system.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: Not applicable.
References
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Articles in the same Issue
- Frontmatter
- Original Research Articles
- Heat transfer at nano-scale and boundary conditions: a comparison between the Guyer-Krumhansl model and the Thermomass theory
- Exergy-based efficient ecological-function optimization for endoreversible Carnot refrigerators
- Effect of depositional nanoparticles on heat transfer at the solid–liquid interface using molecular dynamics simulations
- Optimization of injection parameters, and ethanol shares for cottonseed biodiesel fuel in diesel engine utilizing artificial neural network (ANN) and taguchi grey relation analysis (GRA)
- A general relativistic kinetic theory approach to linear transport in generic hydrodynamic frame
- Asymmetric quantum harmonic Otto engine under hot squeezed thermal reservoir
- Approaches of finite-time thermodynamics in conceptual design of heat exchange systems
- Thermal transport in a silicon/diamond micro-flake with quantum dots inserts
- Finite element analysis on generalized piezothermoelastic interactions in an unbounded piezoelectric medium containing a spherical cavity
