PowerCold Evaporative Fluid Coolers

The additional cost of a geothermal system is one of the most significant barriers for many potential geothermal system owners. The operating cost, reduction of greenhouse gas emissions and lower maintenance costs are all very attractive to the people paying the energy bills, but the upfront capital cost stops many in their tracks.

Many commercial buildings, even in northern climates, are often air conditioning whenever the building is occupied. As soon as the sun rises and people arrive at work, they turn on the lights, computers and other office equipment and begin heating the building. A heavily occupied building with a lot of elecctrical loads will need air conditioning even when the outdoor temperature is -20 deg. F (-28 deg. C)

The earth loop for a building like this will operate at high temperatures all winter long. There are several solutions:

• Use more heat in other nearby buildings that aren't as cooling dominant (makes the system more efficient, but there are not always other uses for the heat)
• Install more earth loop (makes the system more efficient, but expensive to install)
• Get rid of excess heat

Evaporative fluid coolers are used to exhaust heat from a warm ground loop.  Their operation can be optimized to provide cooling when the outdoor temperature is considerably less than the ground loop temperature, which means less water and energy is consumed to reject the heat.