Building Energy Software Tools
Formerly hosted by US Dept. of Energy    

GLHEPRO

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GLHEPRO was developed as an aid in the design of vertical borehole-type ground loop heat exchangers used in geothermal heat pump systems. While GLHEPRO may be used for residential system design, it is aimed at commercial systems. The heat exchanger may be composed of any number of boreholes arranged in various configurations.

GLHEPRO performs three different tasks: (1) Simulation (for up to 100 years) of ground loop heat exchangers to determine monthly average and peak heat pump entering and exiting fluid temperatures, as well as power consumption of the heat pump. (2) Determination of the required borehole depth to meet user-specified minimum and maximum heat pump entering fluid temperatures. (3) Sizing of hybrid ground source heat pump (HGSHP) systems by determination of the required borehole depth and necessary supplemental heat rejecter (cooling tower, fluid cooler) or heat extractor (boiler) size.

Expertise Required: 

Basic understanding of building simulation (to obtain the requisite loads), HVAC systems, and ground source heat pump systems is assumed.

Audience: 

Consulting engineers

Input: 

Monthly heating and cooling loads on heat pumps; monthly peak heating and cooling loads on heat pumps; heat pump data; ground thermal properties; borehole configuration; maximum and minimum acceptable heat pump entering fluid temperatures (EFT).

Output: 

Required size of ground heat exchanger corresponding to maximum and minimum acceptable heat pump EFT; required size of supplemental heat source/sink for HGSHP systems; month-end daily average EFT, monthly minimum and maximum heat pump EFT. Also provides input for simulation of ground heat exchangers in EnergyPlus.

Strengths: 

Design of vertical, closed-loop ground heat exchangers.

Country: 
United States
Major Capabilities: 
HVAC System Selection and Sizing
Detailed Component Simulation
Building Type: 
Commercial
Residential
Keywords: 
OpenStudio
Language: 
English
Platform: 
Windows
Last Software Update: 
09 December 2014
Last Entry Update: 
18 July 2018
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