GLHEPRO SUpport & FAQs

This is a display problem only and will not affect your calculations. The value you most recently accepted for borehole pipe diameter will be used in the calculations.

Because GLHEPro does not have Administrator rights to save files in Program Files it puts them in a Virtual Store that can be found programmatically in the original save location. If you want to find the files outside GLHEPro go to the 'C:\Users\'YourUserName'\AppData\Local\VirtualStore\Program Files (x86)' file directory.

The current version is 5.04. If you have an earlier version (5.0-5.03), please contact us at glhepro@okstate.edu to obtain the 5.04 install package. If you have Version 4.0 or 4.1, you can order an upgrade through the OSU Marketplace. Follow the links to order a new version.

Yes and No. GLHEPRO V.5 can be set to approximate a standing column well (SCW) without bleed. In many cases, the bleed, by drawing ground water through the surrounding rock, makes a significant contribution to the performance of a standing column well. Even in cases where there is no bleed, buoyancy-driven advection may enhance the heat transfer. The combined heat and mass transfer in the rock under no-bleed conditions cannot be directly modeled by the conduction-only model in GLHEPRO. Some users have heuristic approximations for the effect of bleed, such as increasing the thermal conductivity. We are not in a position to make a recommendation on this.

For using GLHEPRO V.5 to simulate or size a standing column well without bleed, the following procedure is recommended, based on the only in-hole thermal resistance that an SCW has is the convective resistance at the outer wall.

Choose, under "Calculate Borehole Thermal Resistance", the concentric tube option.

Set outer tube inside diameter (D2) to the actual well diameter.

Set outer tube outside diameter (D1) slightly larger, say 0.1 inches larger than D2.

Set borehole diameter (d) another 0.1 inches larger than D1.

Change the outer pipe and grout conductivities and volumetric heat capacities to be the same as the soil.

Set the inner tube dimensions and conductivities corresponding to the dip tube.

Choose Option 2 to calculate the convection coefficient at the borehole wall.

Press the Calculate Borehole Resistance button, then OK to return to the main screen.

The following instructions were provided by one of Dr. Spitler’s former graduate students.

Step 1: Setup an hourly report for building HVAC system cooling and heating loads. An example of eQUEST/DOE-2.2 input file is given in the following:

$ ---------------------------------------------------------

$ Hourly Reporting

$ ---------------------------------------------------------

"Hourly Report Block 1" = REPORT-BLOCK

VARIABLE-TYPE = BUILDING-HVAC

VARIABLE-LIST = ( 1, 2 )

..

"Hourly Report 1" = HOURLY-REPORT

REPORT-SCHEDULE = "Hourly Report Schedule"

REPORT-BLOCK = ( "Hourly Report Block 1" )

..

Step 2: Run eQUEST simulation and export the hourly results to a CSV file with the "Export Hourly Results..." utility provided in the "File" menu of eQUEST.

Step 3: Load the two columns of data: "Building cool load (coils+losses&gains) (Btu/hr)" and "Building heat load (coils+losses&gains) (Btu/hr)", into the "Peak Loads Analysis Tool" of GLHEPRO (V4.0) following the tool instructions, then use the tool to generate the monthly cumulative/peak heat/cool loads. Also, estimate the "duration of peak hours" with the tool.

Step 4. Copy and paste these data into GLHEPro's "Heat Pump Load" table.