Thermodynamic and thermo-economic analysis and optimization of performance of irreversible four-temperature-level absorption refrigeration

Thermoelectric generator for industrial gas phase waste heat recovery

This paper presents a developed ecological function for absorption refrigerators with four-temperature-level. Moreover, aforementioned absorption refrigerator is optimized by implementing ecological function. With the aim of the first and second laws of thermodynamics, an equivalent system is initially determined. To reach the addressed goal of this research, two objective functions: the coefficient of performance (COP ) and the ecological function (E ) have been involved in optimization process simultaneously. The first aforementioned objective function has to maximize the rest objective functions, on the other hand, have to maximize in parallel optimization process. Developed multi objective evolutionary approaches (MOEAs) on the basis of NSGA-II method are implemented throughout this work.

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Thermodynamic analysis and evolutionary algorithm based on multi-objective optimization of performance for irreversible four-temperature-level refrigeration

Exergoeconomic multi objective optimization and sensitivity analysis of a regenerative Brayton cycle

Application of exergetic sustainability index to a nano-scale irreversible Brayton cycle operating with ideal Bose and Fermi gasses

In this study, a modified ecological function is presented for four-temperature-level absorption refrigerators, and an absorption refrigerator has been optimized using this function An equivalent system was initially identified, followed by the application of the first and second laws of thermodynamics Next, the optimization results were interpreted The results of the optimization process, optimum point of xH, xR, aH, and aR, were defined as 087, 058, 241, 025, respectively In addition to that, the effects of xH, xR, aH, aR, Ta, Tc, Te, and Tg were shown according to exergy destruction, ecological function, coefficient of performance, and cooling load As a result, it was understood that especially the xH, parameter, and the generator temperatures are the variables of the system that require special attention because, at some points, they cause that generator and absorber transfer heat in the opposite direction they need to do

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Emin Acikkalp

Papers

Modified thermo-ecological optimization for refrigeration systems and an application for irreversible four-temperature-level absorption refrigerator