Standing Column Wells

There are three different types of geothermal loop systems: Standing Column, Closed-loop, and Open-to-recycle. These ground loops, which are bored into the ground below the surface, transfer heat to the ground in summer and absorb heat from the ground in winter.

What is a Standing Column well?

A Standing Column well (SCW) is a traditionally constructed water well with a submersible pump system. SCWs are constructed similar to a standard water supply well. Water is pumped from the well, through the heat pump and is returned to the opposite end of the well. When operating in the heating mode, the heat pump extracts heat energy from the water, reducing its temperature, before returning it to the well. Solar stored heat energy in the ground naturally flows from the bedrock into the water to warm it back up before it is recycled back through the heat pump.

Benefits of a Standing Column Well (SCW)

  • Economy & efficiency: Standing column wells are less expensive and more energy efficient than closed-loop well systems.

The GWW Difference: Yielding Efficiency and Economy for Customers
GWW is the only water well contractor and geo-exchange installer in Maine with the knowledge, skill, and ability to install a Standing Column well and pump system, which will provide geo-exchange for geothermal heating and cooling.

*A borehole is a narrow shaft bored in the ground.

standing column well

Here is a diagram of a typical Standing Column well used for both geothermal heating and cooling. The diagram shows the use of bleed which is optional but helps raise the efficiency of the system.