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http://dx.doi.org/10.7316/KHNES.2021.32.1.77

Exergy and Entransy Performance Characteristics of Cogeneration System in Parallel Circuit Using Low-Grade Heat Source  

KIM, KYOUNG HOON (Department of Mechanical Engineering, Kumoh National Institute of Technology)
KIM, KYOUNGJIN (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
JUNG, YOUNGGUAN (Department of Mechanical Engineering, Kumoh National Institute of Technology)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.32, no.1, 2021 , pp. 77-85 More about this Journal
Abstract
In this paper, entransy analysis is carried out for combined heat and power (CHP) generation system driven by low-grade heat source compared with energy and exergy analyses. The system consists of an organic Rankine cycle (ORC) and an additional process heater in a parallel circuit. Special attention is paid to the effects of the source temperature, turbine inlet pressure, and the working fluid on the thermodynamic performance of the system. Results showed that the work efficiency of entransy is higher than that of energy but lower than that of exergy, wheress the process heat efficiency of entransy is lower than that of energy but higher than that of exergy. Entrancy analysis showed the potential to complement the exergy analysis in the optimal design of the energy system.
Keywords
Combined heat and power(CHP); Organic Rankine cycle(ORC); Low-grade heat source; Exergy; Entransy;
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