22 May 2008

ENHANCED DESIGN AND ENERGY ANALYSIS TOOL FOR GEOTHERMAL WATER LOOP HEAT PUMP SYSTEMS


Because of the outstanding energy saving potential and flexible control capability,
geothermal water loop heat pump system (GWLHP) has attracted more and more attention.
In order to mostly realize the energy saving potential of the GWLHP system, proper system
design is essential. In addition, to get the deserved energy efficiency incentives or LEED
points for applying GWLHP system, it is usually required to compare the performance and
energy consumption between GWLHP system and a standard HVAC system. It is thus highly
desired to have a tool that is able to calculate the building heating and cooling loads, design
ground heat exchanger, and predict the performance and energy consumption of the
GWLHP system. For this purpose, an integrated building and HVAC system simulation tool
has been enhanced recently to facilitate the design and energy analysis of the GWLHP
systems. This paper gives an overview of the enhancements, verification of the new
enhancements, and example applications of the enhanced design and simulation tool.