Performance analysis of a dual ejector enhanced vapor injection high-temperature heat pump

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-21 DOI:10.1016/j.ijrefrig.2025.05.015

Yuefen Gao , Wenjie Yang , Yiying Zhang , Zexian An , Minli Yan

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Abstract

The traditional vapor injection high-temperature heat pump cycle (VIHPC) has the shortcomings of high compression ratio and limited make-up gas volume for vapor injection, in order to make up for this shortcoming, this paper proposes a dual ejector enhanced vapor injection high temperature heat pump cycle (DEHPC), in which dual ejectors are used, in which the function of ejector 1 is to enhance the refrigerant pressure at the compressor inlet, while the function of ejector 2 is to enhance the make-up gas volume for vapor injection. R1233zd(E) was used as the working fluid for energy analysis and exergy analysis of the two heat pump cycles. The simulation results show that the heating coefficient of performance (COP_h), exergy efficiency (η_ex), and make-up gas volume for vapor injection (m_i) of DEHPC are better than those of VIHPC. Specifically, the COP_h, η_ex, and mi of DEHPC are improved by 8.8 %-13.4 %, 8.5 %-13.6 %, and 50 %-74.5 %, respectively, compared with VIHPC. In this paper, the performance of VIHPC is enhanced by the reasonable arrangement of double ejectors in the heat pump, which provides a new idea for the research of heat pump system and proposes a novel and efficient high-temperature heat pump system for factories that need high-temperature heat source.

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双喷射器增强型蒸汽喷射高温热泵性能分析

传统的注汽高温热泵循环（VIHPC）存在压缩比高、注汽补充气量有限的缺点，为了弥补这一缺点，本文提出了一种双喷射器增强型注汽高温热泵循环（DEHPC），采用双喷射器，其中喷射器1的作用是提高压缩机进口冷媒压力；而喷射器2的作用是增加补气量以供蒸汽喷射。采用R1233zd(E)作为工质进行两个热泵循环的能量分析和用能分析。仿真结果表明，DEHPC的热力性能系数（COPh）、火用效率（ηex）和注汽补充气量（mi）均优于VIHPC。具体来说，与VIHPC相比，DEHPC的COPh、ηex和mi分别提高了8.8% ~ 13.4%、8.5% ~ 13.6%和50% ~ 74.5%。本文通过在热泵中合理布置双喷射器，提高了VIHPC的性能，为热泵系统的研究提供了新的思路，为需要高温热源的工厂提出了一种新型高效的高温热泵系统。

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

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.