Constructal thermodynamic optimization theory for energy utilization systems:its research progress and preliminary exploration for application in solar-driven polygeneration systems combining heating,power,cooling and hydrogen production
Firstly,this paper introduces the origin and recent research progress of new thermal optimization theories such as finite time thermodynamics,constructal design and constructal thermodynamic optimization.Secondly,the applications and research progress of these new theories in performance optimizations for thermodynamic cycles and thermal components are introduced.Then,based on the efficient cascade utilization of energy,this paper proposes an energy supply method based on solar energy and fuel replenishment,integrates gas turbine cycle,supercritical carbon dioxide Brayton cycle,organic Rankine cycle,absorption refrigeration cycle and hydrogen production process,and establishes a new configuration of solar-driven polygeneration system combining heating,power,cooling and hydrogen production.Finally,constructal thermodynamic optimization for the new configuration of polygeneration system is discussed preliminarily.The core is to focus on three key scientific issues,including the"heating-power-cooling-hydrogen production"coordinative optimization mechanism and regulation mechanism of polygeneration system,the coupling evolution law of"flow-structure-performance"and the enhancement mechanism of heat transfer and thermal and work conversion of thermal components,as well as the efficient cascade utilization of energy and multi-parameter constructal thermodynamic optimizations for the polygeneration systems.Considering the series/parallel/series-parallel coupling modes of sub-cycles,finite time thermodynamic optimizations for the polygeneration systems,the constructal designs for thermal components,the constructal thermodynamic optimizations for the polygeneration systems,and the comprehensive comparisons of the optimization results for the three polygeneration systems will be carried out by means of theoretical analyses,numerical calculations and experimental verification.The integrated global performance optimizations of thermal components and thermodynamic cycles for the polygeneration systems will be achieved.The formation of the idea and framework of energy cascade utilization optimization theory for polygeneration total energy systems will be promoted to serve the"double carbon"strategy.
constructal designfinite time thermodynamicsconstructal thermodynamic optimizationsolar energypolygeneration system
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