Performance analysis of a new ORC-VCC system with mechanical overheating and correlation fitting of most important system parameter

IF 1.6 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Thermal Science and Engineering Applications Pub Date : 2023-10-11 DOI:10.1115/1.4063733

Dahan Sun, Zhongyan Liu, Hao Zhang, Jiang Qin

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引用次数: 0

Abstract

Abstract This paper proposes a new ORC-VCC(Organic Rankine Cycle+Vapor compression cycle) system(with mechanical overheating refrigeration cycle), and this system can not only reduce the heat absorption of the ORC evaporator, but also increase the refrigeration capacity of the system. Simulations were conducted to analyze the thermal efficiency and performance of the new system, and compare it with the system of ORC-VCC(with regenerator). The results show that the ηth, ηsys and COPsys(coefficient of performance) of new system are higher than the system of ORC-VCC(with regenerator), ηth, ηsys and COPsys of new system increased by up to 31.6%, 6.48%, 10.63% respectively. And the influence of superheat on both systems is stronger than other factors, the influence of superheat on the new system is obviously stronger than those of the system of ORC-VCC(with regenerator), and the influence of superheat on R245fa and Butane is stronger than those of other working fluids. In addition, ηth, ηsys, COPsys and ηex of system increase with the increase of Te-mech and decrease with the increase of Tg-mech. Finally, the correlation of δTmax with the change of ηexp and Te-orc is fitted, the results will provide some reference for the development of the ORC-VCC system in the future.

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一种具有机械过热的新型ORC-VCC系统的性能分析及主要系统参数的相关拟合

摘要本文提出了一种新的ORC- vcc(有机朗肯循环+蒸汽压缩循环)系统(带机械过热制冷循环)，该系统既可以减少ORC蒸发器的吸热，又可以提高系统的制冷能力。通过仿真分析了新系统的热效率和性能，并与ORC-VCC(带蓄热器)系统进行了比较。结果表明，新体系的ηth、ηsys和COPsys(性能系数)均高于ORC-VCC(带蓄热器)体系，新体系的ηth、ηsys和COPsys分别提高了31.6%、6.48%和10.63%。过热度对两种体系的影响均强于其他因素，且对新体系的影响明显强于ORC-VCC(带蓄热器)体系，对R245fa和丁烷的影响强于其他工质。体系的ηth、ηsys、COPsys和ηex随Te-mech的增大而增大，随Tg-mech的增大而减小。最后，拟合了δTmax与ηexp和Te-orc变化的相关关系，为今后ORC-VCC体系的发展提供参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Thermal Science and Engineering Applications THERMODYNAMICSENGINEERING, MECHANICAL -ENGINEERING, MECHANICAL

CiteScore

3.60

自引率

9.50%

发文量

120

期刊介绍： Applications in: Aerospace systems; Gas turbines; Biotechnology; Defense systems; Electronic and photonic equipment; Energy systems; Manufacturing; Refrigeration and air conditioning; Homeland security systems; Micro- and nanoscale devices; Petrochemical processing; Medical systems; Energy efficiency; Sustainability; Solar systems; Combustion systems