Geo-Heat Center Software

Geo-Heat Center Software

This disk contains 6 spreadsheets and 2 programs along with the instructions for their basic operation. These tools were originally developed by GHC staff for in house use. As a result, use of the spreadsheets and programs assumes a comprehensive knowledge of the principles and processes addressed in the calculations. In some cases, GHC publications related to the software are referenced in the instructions if the user requires some additional background in that particular topic. Generally, these tools are intended for use by engineers or others with a strong background in geothermal direct use project design and calculations. The GHC does not provide support for the software included on this disk. All of these tools were developed for use in conjunction with geothermal direct use systems. None are intended for use in the design or analysis of geothermal heat pump systems.

Included in the package are the following items:


HEATOOLS - Includes several useful calculations in the area of heat transfer from bare plastic tubes to air, (internal Reynolds number, internal and external film coefficients, overall heat transfer, delta T) typical of the application in which small diameter tubes are used for providing heat to a greenhouse. A second portion of the spreadsheet addresses heat transfer from bodies of water to the air tailored to the typical aquaculture pond or pool application. Calculations include four modes of heat transfer - conduction to the ground along with radiant, convective and evaporative losses to the air. English Units. Documentation

RETROFIT - Includes calculations related to the economics of retrofitting small buildings (<20,000 sq ft) for connection to low temperature geothermal district heating systems. The spreadsheet calculates a retrofit cost for the building, estimates savings and provides a simple payback. English units. Documentation

COST - Includes calculations related to the economics of using geothermal compared to natural gas for a user defined heating load. This is a tool that is best used to evaluate the feasibility of using geothermal to supply an industrial process or a large space heating load. The spreadsheet calculates the cost of a geothermal well (or wells) to serve the application along with all of the related equipment to supply water to a load (well pump, surface piping, fittings, injection well etc) and the same costs for an equivalently sized boiler and its related components. Annual O&M costs for both the geothermal and boiler are developed and along with the annual energy to be supplied, used to determine the energy cost per million Btu. This is also a useful tool for estimating well costs for direct use applications. English units. Documentation

GHPEAK - Includes calculations for the determination of the relative contributions of a geothermal base load and conventional fuel peak load heating systems serving a single facility (based on a greenhouse application). Though rarely practiced in the US, base load/peak load design is a common practice in large district heating systems in Europe. It is a strategy that permits a downsized (relative to the peak load) heating system to capture the majority of the annual heating requirements of a structure. English units. Documentation

GHS - Allows the user to compare the performance of several types of greenhouse heating equipment under the same temperature and flow conditions. With a user defined greenhouse, geothermal resource temperature, and Delta T, the spreadsheet looks at the number of unit heaters, fan coil units, low temperature unit heaters, length of finned pipe and the length of base plastic tubing required to meet the load. In addition, propane fired unit heaters can also be evaluated. Because different types of heating equipment is more cost effective than other types at certain water temperatures, this tool allows the user to select the equipment that best fits the application. English units. Documentation

HTX - Allows the user to evaluate the performance of a heat exchanger at other flows and temperatures than that for which it was designed. Based on the performance of plate and frame type heat exchangers, the spreadsheet allows the input of entering temperatures and flows into the heat exchanger along with overall heat transfer coefficient. Output is exit temperatures and overall heat transfer in Btu/hr. English units. Documentation


QPIPE - Includes calculations related to the heat loss (or gain) from a buried pipeline. User defined, pipe, insulation, soil conductivity, flow rate size and burial depth are combined to calculate heat transfer to the ground. English units. Documentation

DHE - Includes calculations for the heat output of a downhole heat exchanger (DHE) in a well where convective, steady-state heat transfer is predominant. The program is capable of considering one of two configurations: perforated casing (the common construction in Klamath Falls, OR) or perforated flow promoter pipe inside a blank casing (the common construction in New Zealand). SI units. Documentation


To order the Software CD online go to the Geo-Heat Center Store

For questions about the software programs contact the Geo-Heat Center at (541) 885-1750 or send an E-mail to

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Geo-Heat Center
3201 Campus Drive
Klamath Falls, OR 97601
Phone: (541) 885-1750
Fax: (541) 885-1754

This page was last updated on January 1, 2012 by the Geo-Heat Center
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