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.

Determination of the required borehole depth to meet user-specified minimum and maximum heat pump entering fluid temperatures.

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.

Monthly and monthly peak heating and cooling loads on the heat pumps. These are obtainable from programs such as HVAC Load Calculations for Windows, Trane Systems Analyzer, and other similar programs. GLHEPRO has an interface to the above-named programs which automates the data transfer. For other programs, the loads must be typed in manually.

Ground thermal properties. GLHEPRO has a small database of ground thermal properties for a few different ground types. For larger jobs, an in situ test is recommended, using the in situ methodology developed at Oklahoma State University.

Ground loop heat exchanger information. The user must select a borehole configuration and specify some related additional information - borehole diameter, borehole spacing, grout and piping properties, and fluid type and flow rate. Open and closed rectangle, line, U-shaped, L-shaped, and stacked L-shaped configurations are available; additionally, the Large Rectangle option can be purchased, which provides additional borehole configurations up to 900 boreholes.

Heat pump information. GLHEPRO has a database of heat pump types from most manufacturers. Any models not available in the database may be added by the user using commonly available catalog data.

Capability to model rectangular borefields up to 900 boreholes.

Sizing of ground loop heat exchanger and supplemental heat source/sink as part of a hybrid ground source heat pump system.

More accurate calculation of borehole thermal resistance, including thermal mass effects.

Revamped fluid property routines. The working fluid can now be specified in terms of composition and concentration.

Addition of double U-tube and concentric tube heat exchangers.

Marked improvement of output reporting. Users can specify what information is reported, and have the option of creating a Microsoft Excel-compatible .CSV file.

International ground temperatures are available for several locations, and users may enter additional locations.

Heat pump database has been greatly expanded.

First Class Mail (default). Cost included in purchase price.

First Class Mail International (default). Cost included in purchase price.
Please note that the U.S. Postal Service states that normal transit time for most international destinations is 6-10 days (without any holdup in Customs); however, some packages have taken as long as 23 days. Furthermore, packages sent by the U.S. Postal Service cannot be tracked, so we cannot answer queries regarding the status of your package once it has been mailed.

Fed-Ex International, or current OSU-contracted shipper. The cost is $75 (USD), paid by a US-dollar denominated check. We're sorry, but we are unable to accept payment via credit card or wire transfer for these charges.
Please note that packages sent by Fed-Ex and similar shippers are trackable, so we can check the status of your package in transit.

Download. Cost included in purchase price. Download instructions are sent via email as soon as payment has been verified. The download includes all of the same files (including the manual) as the mailed CD.

James R. Cullin

School of Mechanical and Aerospace Engineering
Oklahoma State University
218 Engineering North
Stillwater, Oklahoma 74078-0545
Phone: (405) 744-7716

email: james.cullin@okstate.edu

For fastest response, email is preferred.