The closed loop system is becoming the preferred method of geothermal energy capture, as this system is not dependent on water quality or quantity. In this system a single or series of vertical holes are drilled (typically 200 ft). Each bore hole is between 5 and 6 inches in diameter. Inserted into each bore is a length of polyethylene pipe, between 3/4 and 1 inch in diameter. The remainder of the bore hole is filled with bentonite clay, which will enhance ground temperature transfer. Each polyethylene pipe (loop) is filled with a water/antifreeze solution. This solution will then circulate through the loops, to the heat pump located in your home or business, and then back to the underground loops. The number and depth of holes required is specific to each project and should be determined by your heating and cooling specialist. Designed to work with Ground Source Heat Pump.
In an open-loop system the process uses underground water to pass through your heat pump, this method is also known as a pump and dump system. The underground water stays at a very constant rate (56 degrees in Kansas) year round; therefore, a very efficient way to heat and cool a home. The water is removed from a well then passes through the heat pump and discharges back into a well, lake, river, or any number of ways as to not cause surface pooling. Typically this method is more efficient and the initial cost is lower. The downside of this system is having water quantity, quality, and a good discharge location. We can properly fit you with a geothermal system that is cost effective and long lasting.