Closed vs Open Loop Geothermal Heating Systems

Description of GHP systems

Geothermal heat pumps (GHPs) for Closed & open loop geothermal heating, also classified as heat pumps from the ground source, are able to heat, cool down and also provide a house with hot water by transferring heat from or to the land, For more than 50 years, this system has held customers happy and can reduce their energy bills by up to 65% compared with conventional HVAC systems.

Due to the constant underground temperature of the earth (from 45 ° to 75 ° F depending on the location), geothermal energy heat pumps can work in any environment, whether cold or dry. Indeed, millions of GHP devices already include all 50 United States States, heating and cooling homes and businesses worldwide.

A GHP system takes ground water from a well and uses it as a heat source or sink to a heat pump (or indirect heat exchanger). One that design uses a central heat exchanger from water to surface between groundwater and a closed water circuit.

connected with the building’s water-to-air heat pumps. A second option is to use a heat recovery chiller for the diffusion of ground water and to heat and cool a hydro-loop.

As owners of homes and businesses, we also try strategies to save electricity and operating costs. One of the easiest ways to achieve that is to insure the heating and cooling device is the most effective of resources available. There is no competition here: geothermal systems are “the most energy-efficient, safe and economical systems available today for space conditioning.”

Geothermal systems are the most effective heating and cooling systems available for residential and commercial use. In the winter, they use the constant surface temperature as a heat source and in the summer, they use a heat exchanger. The stable ground temperature offers a secure constant that is acceptable for heating applications and low enough for heat absorption for cooling applications.

Therefore, geothermal heating systems have to be configured so that they are reliably worked, depending on the size, distance, form of insulation and a number of other factors.

Closed & open loop geothermal

You can certainly start to see the terms ‘ closed & open loop geothermal ‘ as you begin to study geothermal systems for your home or business. Geothermal energy for heating and cooling applications falling into two separate categories was used in many different ways: open loop geothermal systems and closed loop geothermal systems.

We are here to help you understand the distinction between closed & open loop geothermal!

Closed Loop Geothermal

A closed loop system comprises of deep continuous pipe loops filled with liquid that keeps the ground temperature from moving to the geothermal heat pump, A closed loop system, depending on your ground capacity, can be mounted vertically or horizontally:


Horizontal: Geothermal horizontal loop systems are systems that use horizontally installed piping using geothermal floor heating. Such structures can space considerably as the loops operate longitudinally.

Vertical: Other form of geothermal loop system is the geothermal loop system with a vertical loop. The pipelines are vertically positioned between 100 and 400 meters deep in a variety of wells and attached at the bottom by a U-bend rather than flowing horizontally.

Open Loop Systems

An open loop system uses groundwater from both a traditional supply and a winter heat source and a summer heat sink The air is extracted by the heat pump and either the electricity is collected (in winter) or discharged (in summer), Then the water is properly disposed – typically through so-called ‘ open discharge ‘ where the water is discharged into a tile of streams, rivers, reservoirs, wetlands, ditches or drainages. Another method for water recycling is to return far back to the soil groundwater.

One of the potential problems with an open loop system is the poor quality of the water. The water source must be tested for hardness, acidity and iron content before an open loop system is installed. Geothermal open loop systems are an excellent performance option. Open loop geothermal systems can be built to use water from a stream or drain, a dam or pond or a sink or a spring and a pond or pool, the prices, the room required and the reliability of the system are determined by different factors on each project.

Geothermal heat systems can dispose of water in a variety of ways. One is a water drainage system which collects the water in a low area, like a pond or canal. Re-injection is also an alternative method of ridding water.

It is important to know whether the well contains water enough to fuel the geothermal heat pump before installing an open loop device. Even if the water needed for your geothermal pump is stored in a well, it could also deplete a neighbor’s well source.

Which to Choose?

The question now is what is the better from closed & open loop geothermal? In most situations, because the constant temperature of the groundwater and the incredible In most instances, geothermal open loop systems are less costly and more effective than closed loop geothermal systems because of the constant groundwater temperature and their extreme conductivity compared with the anti-freeze system in a geothermal closed loop system, which absorbs and releases heat through a polyethylene tube, But, open loop systems are not feasible in many cases either because there is no groundwater source available, the groundwater has too much iron or because municipal law can prohibit open loop systems.

Benefits of GHP:

  • Ghp reduce peak electricity demands and greenhouse gas emissions

As already described, GHPs are more energy efficient than conventional HVAC systems and can help to lighten the electricity grid load, especially in the summer months. Additionally, due to their high performance, they can help to reduce carbon emissions.

  • Geothermal heat pumps create u.s. jobs

The U.S. energy sector has also been improved by GHP initiatives. Almost all parts are made in the United States (ground heat exchangers, heat pumps, etc.), however GHPs can not never be moved. It leads to improving local economies by hiring local contractors to dig hole and mount single GHP system.

·         Operating Cost

The low energy required to operate a geothermal heat pump results in significantly lower energy costs in installed homes. Better yet the system does not require any exhalation because geothermal does not need combustion to generate heat.


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