eCite Digital Repository

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


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


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 (excl. chemical and electrical)
Objective Division:Energy
Objective Group:Energy efficiency
Objective Field:Commercial energy efficiency
UTAS Author:Wang, X (Professor Xiaolin Wang)
ID Code:104271
Year Published:2015
Web of Science® Times Cited:20
Deposited By:Engineering
Deposited On:2015-11-06
Last Modified:2017-11-06

Repository Staff Only: item control page