混合室直径对带喷射器的跨临界CO2热泵性能影响

doi:10.11949/j.issn.0438-1157.20151268

化工学报 ›› 2016, Vol. 67 ›› Issue (5): 1719-1724.DOI: 10.11949/j.issn.0438-1157.20151268

混合室直径对带喷射器的跨临界CO₂热泵性能影响

魏晋, 唐黎明, 亓海明, 陈琪, 陈光明

浙江大学制冷与低温研究所, 浙江杭州 310027

收稿日期:2015-08-07 修回日期:2016-01-06 出版日期:2016-05-05 发布日期:2016-05-05
通讯作者: 陈琪
基金资助:
国家自然科学基金项目(51376156)。

Effect of mixing chamber diameter on performance of transcritical CO₂ heat pump system with ejector

WEI Jin, TANG Liming, QI Haiming, CHEN Qi, CHEN Guangming

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

Received:2015-08-07 Revised:2016-01-06 Online:2016-05-05 Published:2016-05-05
Supported by:
supported by the National Natural Science Foundation of China (51376156).

摘要/Abstract

摘要：

通过在跨临界CO₂系统中引入喷射器是回收系统节流损失的有效手段。实验研究了混合室直径分别为1.2、1.4、1.6 mm时,对带喷射器的跨临界CO₂热泵整体性能以及喷射器自身性能的影响。整个实验中热水进口温度、蒸发温度不变,热水出口温度作为比较基准,在实验中为变量。结果表明,混合室直径对压缩机排气温度影响较小,而其对压缩机排气压力影响较大,当混合室直径为1.6 mm时,压缩机排气压力最小;当混合室直径为1.6 mm时,系统制热系数最高。

关键词: 二氧化碳, 热泵, 回收, 跨临界, 喷射器, 混合室直径, 系统性能

Abstract:

The use of ejectors is one of the most promising methods to recover the throttling loss of transcritical CO₂ heat pump systems. Experimental investigation on the effect of mixing chamber diameter on the performance of transcritical CO₂ heat pump system with ejector was carried out. The mixing chamber diameter was 1.2, 1.4 and 1.6 mm, respectively. The hot water inlet temperature, as well as the evaporating temperature was kept constant in all experiments. Hot water outlet temperature as a variable was chosen to be the comparison reference of the experiments. The results showed that the effect of the mixing chamber diameter on the compressor exhaust temperature was relatively small. However, the diameter has a significant effect on the compressor exhaust pressure. The system with 1.6 mm mixing chamber diameter had the lowest compressor exhaust pressure and the highest heating coefficient of performance (COP). Moreover, for the performance of the ejector, the mixing chamber diameter had a greater effect on the entrainment ratio than the pressure lift ratio.

Key words: carbon dioxide, heat pump, recovery, transcritical, ejector, mixing chamber diameter, system performance

中图分类号:

TB61

魏晋, 唐黎明, 亓海明, 陈琪, 陈光明. 混合室直径对带喷射器的跨临界CO₂热泵性能影响[J]. 化工学报, 2016, 67(5): 1719-1724.

WEI Jin, TANG Liming, QI Haiming, CHEN Qi, CHEN Guangming. Effect of mixing chamber diameter on performance of transcritical CO₂ heat pump system with ejector[J]. CIESC Journal, 2016, 67(5): 1719-1724.

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混合室直径对带喷射器的跨临界CO₂热泵性能影响

Effect of mixing chamber diameter on performance of transcritical CO₂ heat pump system with ejector

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