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Fieldhouse Geothermal Heat Pumps – Effective Concepts LLC
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Apr 112014
 

Thirty years ago I started selling Geothermal Heat Pumps, when I worked at Baker Wholesale in Fargo. We had one customer who was a well driller and he expanded his business into Geothermal. My father helped him design bigger and bigger systems. The bigger the facility the better Geothermal looks. In addition to the greater efficiency, there is also greater flexibility in a multi-zone facility.

In the April 2014 issue of Energy Systems Magazine, Daniel Cohen writes about the Ping Tom Memorial Park Fieldhouse. The field house runs its geothermal heat pumps off of 16) 650-ft-deep vertical wells. This is five times deeper than the well fields we would normally design, but I’m sure they had land use issues so going deep was easier than the drilling more wells.

Ping Tom Memorial Fieldhouse

Chicago’s Ping Tom Memorial Fieldhouse
photo by James Steinkamp/Steinkamp Photography

Environmental Systems Design (ESD) selected Geothermal units for their high energy efficiency ratio (EER) and coefficient of performance (COP). They are estimating a COP of 4 making this heating system 400% more efficient than straight resistant electric heat. In addition they connected modular heat pumps in each zone throughout the field house.

“The heat pumps are independently controlled which allows for energy to be shared and distributed from zone to zone.”

Downsides to Geothermal: it is slightly more expensive to install, but the long term energy profile and operation cost savings makes it the perfect energy source for buildings large and small. Geothermal systems need land to drill the well field, but once it’s in you can use the land for anything you want.

I also like how ESD used CO2 sensors to modulate ventilation airflow based on occupancy. By using VAVs and controlling the ventilation load, the building can retain much of the heat that other buildings vent outside. Add in the Economizer and Energy Recovery system, this building should be inexpensive to operate.

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