Heat-pipe enhanced solar-assisted heat pump water heater
Journal
Solar Energy
Journal Volume
78
Journal Issue
3
Pages
375-381
Date Issued
2005
Author(s)
Abstract
A heat-pipe enhanced solar-assisted heat pump water heater (HPSAHP) is studied. HPSAHP is a heat pump with dual heat sources that combines the performance of conventional heat pump and solar heat pipe collector. HPSAHP operates in heat-pump mode when solar radiation is low and in heat-pipe mode without electricity consumption when solar radiation is high. HPSAHP can thus achieve high energy efficiency. A prototype was designed and built in the present study. An outdoor test for a HPSAHP in the present study has shown that COP of the hybrid-mode operation can reach 3.32, an increase of 28.7% as compared to the heat-pump mode COP (2.58). © 2004 Elsevier Ltd. All rights reserved.
Subjects
Heat pump; Solar heat pump; Solar thermal; Solar water heater
SDGs
Other Subjects
Electricity; Energy efficiency; Heat pipes; Heat pump systems; Solar collectors; Solar radiation; Electricity consumption; Heat pump modes; Heat pump water heaters (HPSAHP); Solar heat pipe collectors; Solar water heaters; heat pipe; heat pump; heating; solar power
Type
journal article