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混合工质内置热泵有机朗肯循环冷热电联供系统性能研究

DOI: 10.13334/j.0258-8013.pcsee.2015.19.015, PP. 4972-4980

Keywords: 有机朗肯循环,热泵,热电冷联供,性能系数,?效率

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Abstract:

提出了一种使用非共沸混合工质的内置热泵的有机朗肯循环冷、热、电联供系统。与前人提出的纯工质系统不同,该系统将工质的冷凝过程分为高温段和低温段。在高温冷凝器后,将气、液两态的工质分离,使接下来的2种流程中的工质浓度产生差异。在热、电联供和冷、热、电联供2种运行模式下,分别计算不同引射系数时该系统(使用混合工质R245fa/R134a,75:25)和纯工质系统(分别使用R245fa和R134a)的发电效率、性能系数、?效率、经济热效率和制冷热效率,并将2种系统进行对比。混合工质系统在2种运行模式下的性能系数分别达到了1.35和1.39,明显高于纯工质系统。

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