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Experimental study on the performance of a vapor injection high temperature heat pump

Citation

He, Y and Cao, F and Jin, L and Wang, X and Xing, Z, Experimental study on the performance of a vapor injection high temperature heat pump, International Journal of Refrigeration, 60 pp. 1-8. ISSN 0140-7007 (2015) [Refereed Article]

Copyright Statement

2015 Elsevier Ltd and International Institute of Refrigeration

DOI: doi:10.1016/j.ijrefrig.2015.08.012

Abstract

In this study, a vapor injection technique was applied in a high temperature heat pump (HTHP) for providing hot water at temperatures up to 88 C. A prototype HTHP system with economizer vapor injection was developed and its performance was experimentally investigated under various operating conditions. Results showed that the vapor injection pressure had a large effect on heating capacity and on refrigerant temperature at the inlet of the electronic expansion valve (EEV). As the injection pressure increased from 0.82 to 0.98 MPa, the vapor injection flow ratio increased from 7.3% to 22.61% and the heating capacity increased by 7%. The system COP did not show significant change although the COP trend showed an optimal value for the injection pressure. The refrigerant temperature at the EEV inlet showed a subcooling of more than 16 C under all studied conditions, which improved the EEV operating reliability.

Item Details

Item Type:Refereed Article
Keywords:vapor injection, high temperature heat pump, COP, heating capacity
Research Division:Engineering
Research Group:Mechanical Engineering
Research Field:Energy Generation, Conversion and Storage Engineering
Objective Division:Energy
Objective Group:Energy Conservation and Efficiency
Objective Field:Commercial Energy Conservation and Efficiency
Author:Wang, X (Associate Professor Xiaolin Wang)
ID Code:104271
Year Published:2015
Web of Science® Times Cited:2
Deposited By:Engineering
Deposited On:2015-11-06
Last Modified:2017-11-06
Downloads:0

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