Development of Design and Simulation Tool for Hybrid Geothermal Heat Pump System Geothermal Project

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Last modified on July 22, 2011.

Project Title Development of Design and Simulation Tool for Hybrid Geothermal Heat Pump System
Project Type / Topic 1 Recovery Act – Geothermal Technologies Program: Ground Source Heat Pumps
Project Type / Topic 2 Topic Area 2: Data Gathering and Analysis
Project Description eQUEST is a widely accepted building and HVAC system energy analysis tool (freeware) that is powered with the latest implementation of the DOE-2.2 program. Due to its user-friendly interface and comprehensive capacity for performing building load calculations and HVAC system simulations, eQUEST has been widely used in whole building performance analysis for various purposes, including LEED certification and optimization of building envelop and/or HVAC system designs. In 2006, as a cooperative effort between CM and JJH (the developer of eQUEST), eQUEST capabilities were expanded to include simulation of conventional GHP systems comprised of water-to-air heat pump units, horizontal or vertical ground loop heat exchangers (GLHE), and lakes or wells. However, to date, eQUEST does not model hybrid systems, such as the combination of a fluid cooler in series with a GLHE. Nor is it capable of simulating water-to-water heat pumps coupled to a horizontal or vertical GLHE. As a result, significant opportunities are being missed, as hybrid and/or water-to-water GHP system applications may prove to be a cost effective solution in many situations.
State Oklahoma
Objectives Enhance the simulation capacity of eQUEST and make it a more powerful tool for performing energy analysis and optimizing the design of geothermal heat pump (GHP) systems.
Awardees (Company / Institution) ClimateMaster
Awardee Website
Partner 1 James J. Hirsch and Associates
Partner 2 Oak Ridge National Laboratory

Funding Opportunity Announcement DE-FOA-0000116
DOE Funding Level (total award amount) $233,819.00
Awardee Cost Share $84,500.00
Total Project Cost $318,319.00

Principal Investigator(s) Xiaobing Liu, ClimateMaster, Inc.

Targets / Milestones - Implement the simulation of ground coupled water-to-water heat pump systems into eQUEST

- Implement the improved multi-year simulations for conventional GHP and hybrid GHP systems eQUEST
- Implement the models of common hybrid GHP system configurations eQUEST

Location of Project Oklahoma City, OK

Impacts Enables prospective GHP system customers to analyze the cost/performance of a variety of GHP system applications and a tool for purchase and design decisions.
Funding Source American Recovery and Reinvestment Act of 2009
References EERE Geothermal Technologies Programs[1]


  1. EERE Geothermal Technologies Programs