Exergy maximization in cryogenic regenerators

Entropy generation analysis as a design tool—A review

“…Similar studies were performed by other researchers: Krane [56] considered the optimization of a complete charge and discharge process, while a series of storage elements were investigated by Sekulic et al [57]. Sahoo and Das [58] obtained similar results for optimal charging time and storage capacity of thermal regenerators. Latent heat thermal energy storage (LHTES) with phase change materials (PCM) is another unsteady system that has been investigated using EGA.…”

“…Iyengar and Bar-Cohen [47] Heat sink with plate fins Optimal design found minimizing entropy generation and amount of material Mishra et al [38] Plate-fin HEX Full optimization combining genetic algorithm and entropy generation Guo et al [39] Shell-and-tube HEX Full optimization combining genetic algorithm and entropy generation Poulikakos and Bejan [42] Extended surfaces (fins) Optimal configuration of radial, triangular and pin fins through EGM Lin and Lee [43][44][45] Finned HEX Optimal design/operating condition identified using EGM Rao and Patel [31] Cross-flow finned HEX Particle-swarm algorithm used to optimize the design Zhang et al [48] Finned HEX GA algorithm used to optimize the system on the basis of EGM Sahoo and Das [58] Cryogenic regenerators Optimal charging time and storage capacity by irreversibility minimization Kousksou et al [63] Energy storage for solar system Optimal arrangement of PCMs with different melting temperature Jegadheeswaran et al [64] Latent heat storage system Second-law performance evaluation ad effect of operating condition theoretical framework called Constructal Theory has been proposed and extensively illustrated in various reviews available in the literature but extraneous to the scope of the present paper [53,54]. The vast majority of entropy generation analyses available in the literature involves engineering systems that operate at steadystate condition.…”

Entropy generation minimization: The new thermodynamics of finite-size devices and finite-time processes

“…The minimization of entropy generation in periodic-flow regenerative heat exchangers was studied also by Hutchinson and Lyke, 103 Shen and Worek, 132 Mathiprakasam and Beeson, 133 Das and Sahoo, 134 and Sahoo and Das. 135 The thermodynamic arguments of this section were combined with overall cost minimization arguments into a thermoeconomics extension of the sensible heat storage process by Badar et al 136 and Kotas and Jassim. 137 An overview of the thermodynamic optimization of sensible heat storage methods was presented by Rosen et al 138 Treated were the individual storage and removal processes as well as the complete cycle.…”