Re ECF Project: 2007-09

Project Title: Enhancement of integrated heat pumps for energy savings in hot water and air-conditioning at home

Applicant: Dr. Michael K.H. LEUNG of the University of Hong Kong

Total Approved Grant: $149,647.49 (ECF & WWGF: 50/50)

Duration: 01/06/2008 to 31/12/2008

Project Status/Remarks: Completed

The objective of this research is to develop compact, energy-efficient integrated heat pumps for domestic hot water and air-conditioning.

Summary of the Findings/Outcomes:
The domestic integrated heat pump water heater/air-conditioner was successfully designed and built. The experimental test results show that the typical heating coefficient of performance (COP) and cooling COP are 3.46 and 2.90, respectively; hence, the overall COP is 6.36. The energy efficiency is high. The system can run smoothly in different modes of operation in response to the user's demand. The performance implies that the system can effectively supply for the dynamic water heating and space cooling requirement.

The prototype has been used for demonstration of the technology in different occasions: (1) HKU Building Services Engineering Laboratory, ICAE 2009 Conference and HOFEX 2009 Exhibition. The press is also interested in the energy-efficient heat pump technology and newspaper articles have been published to introduce the technology. Professionals as well as the general public are aware of this energy-efficient product becoming available in the market.