Ejector used in transcritical CO2 heat pump system

doi:10.3969/j.issn.0438-1157.2012.z2.031

CIESC Journal ›› 2012, Vol. 63 ›› Issue (S2): 166-169.DOI: 10.3969/j.issn.0438-1157.2012.z2.031

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Ejector used in transcritical CO₂ heat pump system

CHEN Qi, LÜ Yujie, TONG Yang, LI Tao, CHEN Guangming, TANG Liming

Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2012-09-23 Revised:2012-09-28 Online:2012-12-28 Published:2012-12-28
Supported by:
supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry(20111568)and the Zhejiang Qianjiang Talent Project (2012R10030).

跨临界CO₂热泵系统的喷射器特性

陈琪, 吕宇捷, 佟杨, 李涛, 陈光明, 唐黎明

浙江大学制冷与低温研究所, 浙江杭州 310027

通讯作者: 陈琪
作者简介:陈琪(1973-),男,博士,副教授。
基金资助:
教育部留学回国人员科研启动基金项目(教外司留20111568号);浙江省钱江人才计划项目(2012R10030)。

Abstract

Abstract: An experimental transcritical CO₂ heat pump water heater system was designed,and the measurement and control system for testing was developed.The flow rate,entrainment ratio,compression ratio and efficiency of ejector were investigated.The experimental results showed that:the increase of both primary fluid pressure and entrained fluid pressure can improve the performance of the ejector,the decrease of primary fluid pressure or the increase of entrained fluid pressure can improve the ejector working perfection.Development of high efficient ejector was a critical factor on optimizing transcritical CO₂ heat pump system.

Key words: ejector, CO₂, transcritical cycle, efficiency, ejection coefficient, compression ratio

摘要： 在自行研制的跨临界CO₂热泵热水器实验台上,通过调节系统中阀门开度控制喷射器的进出口压力和温度,研究喷射器的流量、喷射系数、压缩比和效率的变化规律。实验结果表明:同时增大工作流体压力和引射流体压力可以提高喷射器的工作性能,减小工作流体压力或者增大引射流体压力可以提高喷射器的工作完善度。高效率喷射器的研制是优化跨临界CO₂热泵系统的关键要素。

关键词: 喷射器, CO₂, 跨临界循环, 效率, 喷射系数, 压缩比

CLC Number:

TB61

CHEN Qi, LÜ Yujie, TONG Yang, LI Tao, CHEN Guangming, TANG Liming. Ejector used in transcritical CO₂ heat pump system[J]. CIESC Journal, 2012, 63(S2): 166-169.

陈琪, 吕宇捷, 佟杨, 李涛, 陈光明, 唐黎明. 跨临界CO₂热泵系统的喷射器特性[J]. 化工学报, 2012, 63(S2): 166-169.

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Ejector used in transcritical CO₂ heat pump system

跨临界CO₂热泵系统的喷射器特性

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