GeoExchange System

CSU has a strong commitment to energy efficiency and is headed in the direction of being a net-zero carbon emitter.  To reach this goal and provide overall cost savings, CSU has transferred the Moby Gym and Fum McGraw buildings from the outdated central steam system to a new geothermal (GeoX) well field installed under the current recreation fields south of Moby Gym.  “GeoX” refers to a geothermal energy exchange system that provides building heating and cooling – reducing energy consumption, costs, and greenhouse gas emissions.

Below a portion of these intramural fields are 342 wells that extend 550 feet deep. This well-field equates to 80 miles of closed-loop piping. GeoX takes advantage of the constant temperature of the earth by pumping liquid through these pipes to be heated or cooled. 

This GeoX system, installed in 2020, provides heating and cooling to 380,000 square feet of building space in the Moby Complex. GeoX replaced the 1960s era systems, dramatically improving overall energy efficiency and helping CSU move toward carbon reduction goals. This system is one of the largest geothermal projects west of the Mississippi River. 

Diagram that shows how the heating and cooling works through the Geo X system, depending on the season. In summer, heat from the heating and cooling (HVAC) system in Moby is sent to the well-field where it transfers that heat to the ground, returning cooler temps to Moby. In winter, heat is transferred from the ground to the liquid in the well-field pipes and returned to Moby.