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Citations:  Bibtex RefMan EndNOte GB/T7714

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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.11 P.1678~1682

doi: 10.1631/jzus.A0920116


Experimental investigation of an adjustable ejector for CO2 heat pump water heaters


Author(s):  Guang-ming CHEN, Li-xia LIANG, Li-ming TANG, Xiao-xiao XU, Zhi-jiang ZHU, Qi CHEN

Affiliation(s):  1.State Key Laboratory of Clean Energy Utilization, Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):  lmtangzju@zju.edu.cn

Key Words:  Adjustable ejector, System performance, CO2 heat pump water heater (HPWH), Entrainment ratio


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Guang-ming CHEN, Li-xia LIANG, Li-ming TANG, Xiao-xiao XU, Zhi-jiang ZHU, Qi CHEN. Experimental investigation of an adjustable ejector for CO2 heat pump water heaters[J]. Journal of Zhejiang University Science A, 2009, 17(10): 1678~1682.

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A1 - Guang-ming CHEN
A1 - Li-xia LIANG
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A1 - Xiao-xiao XU
A1 - Zhi-jiang ZHU
A1 - Qi CHEN
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Abstract: 
An adjustable ejector expansion device for a CO2 heat pump water heater (HPWP) is proposed to improve the system performance. It has been designed to investigate experimentally the effects of the motive nozzle throat area of the ejector, entrained flow pressure, back pressure and primary flow pressure on the entrainment ratio. Experiments based on different motive nozzle throat areas were conducted and the results of the prototype ejector using CO2 as working fluid are presented. The results show that an adjustable ejector can achieve high performance and work well in a wide range of working conditions.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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