TITLE:
The Characteristics of the Evaporator/Evaporator for Direct Expansion Solar Assisted Heat Pump System
AUTHORS:
Mingyan Zhu, Huanrong Xie, Biao Zhang, Xin Guan
KEYWORDS:
Direct Expansion Solar Assisted Heat Pump; Collector/Evaporator; Experimental Research
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.1 No.5,
November
28,
2013
ABSTRACT: Direct expansion solar assisted heat
pump (DX-SAHP) technology is developed by combining solar energy heat utilization
with heat pump energy saving technology. The experimental researches of the
DX-SAHP hot water system are conducted in this paper, and overall performance
of DX-SAHP is analyzed with three different structures of collectors/evaporators,
namely a bare-plate collector, a glass-plate collector and double collectors/evaporators (a bare-plate collector and a
glass-plate collector). The influence factors and overall performance are
studied, which show that the overall performance of the system is mainly
influenced by solar irradiation intensity and the collector area. Comparing
with glass-plate collector in similar conditions, bare-plate collector system
COP is higher. While increasing collector area is conducive to improve the
system COP, but will reduce the collector efficiency and increase the workload
of the compressor by comparing the bare-plate collector with double-plate
collectors.