TITLE:
Comprehensive Benefit Analysis of Direct Expansion Ground Source Heat Pump System
AUTHORS:
Yuefen Gao, Yingxin Peng, Juanjuan Liu
KEYWORDS:
Direct Expansion Ground Source Heat Pump; Economic Benefit; Environmental Benefit
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.2A,
April
30,
2013
ABSTRACT: Direct Expansion Ground Source Heat Pump (DXGSHP) system directly extracts
heat or cold energy from ground by consuming electricity to provide for space
conditioning. Compared with the currently widely-used secondary loop Ground
Couple Heat Pump (GCHP) system, it has higher energy efficiency, lower
operating costs, and less environmental impact. A case study is carried out in
this paper. The subject is a residential building located in Beijing, China. It
is assumed that the building adopts the DXGSHP system and the GCHP system
respectively. Annual loads and energy consumption are simulated and computed.
Then the initial cost, operating cost and CO2 emission are calculated.
The economic benefit is analyzed with the Payback Time method and the Dynamic
Annual Cost Value method. The environmental benefit is discussed mainly by
comparing the CO2 emission savings. The results show that the DXGSHP
system has higher initial costs, but lower operating costs, and less greenhouse
gas emissions. The DXGSHP system has better comprehensive benefits than the
GCHP system.