Geothermal Heat Pump Review
A Geothermal Heat Pump is a pump which uses all natural resources to heat and cool a house
. The difference between a Geothermal Heat Pump and an actual heater is a Geothermal Heat Pump draws its source of heat from the ground, while an actual heater creates heat from utilizing electricity which can be costly.
Geothermal Heat Pumps can also be found under the names of; Geo exchange, Earth coupled, or Water Source Heat Pumps.
How does a Geothermal Heat Pump get the heat from the ground?
The heat pump utilizes a loop of refrigerant sucked through a vapor compressed refrigeration cycle moving heat either in or out. The source of heat is actually much more stable and continuing then air based heat which tends to be less controlled. The other benefit is that Geothermal Heat pumps can also be used to pump the heat out of your house for instant cooling during hot weather.
Geothermal Heat Pumps are also more economically friendly and can reduce the effects of pollution, electricity, and global warming.
What are the different kinds of Geothermal Heat Pumps?
So far some of the different types of geothermal heat pumps in existence are; Ground Exchange, Direct Exchange, closed loop, vertical, horizontal, pond, open loop, and finally standing column well.
Ground Exchange This type of heat pump uses the grounds current heat and exchanges it with the temperatures in your home. If you plan to have a ground sourced heat pump then you will need a heat exchanger which sits against either ground or ground water to make the pump function properly.
Direct Exchange Instead of using a circulating refrigerant the direct exchange geothermal heat pump works by using a SINGLE loop refrigerant in direct thermal contact with the ground.
Closed loop The typical system uses two loops on the ground side and one loop located in the appliance cabinet which exchanges temperatures with the loop which is pulling the temperatures from the ground. Closed loop systems have much longer and larger pipes implemented into the ground for better accuracy and also have an extra loop located in between the refrigerant loop and the water loop, pumping in both loops. Closed loops come in two different types themselves one being the vertical closed loop and the other is the horizontal closed loop. The difference between the two being the vertical closed pump has pipes which run vertical through the ground while the horizontal closed loops have pipes running horizontally through the ground.
Pond Pond based heat pumps are not commonly used due to the need to be close to an external source of water. Pond based heat pumps are more preferred and recommended for people who want to use a pump but have bad quality water, or a low heat source currently containable by a standard heat pump. The Pond based heat pump gets its name from the fact that the loop dragging in the heat is located underneath a large body of water, for example a pond.
Open Loop An open loop is a heat pump which draws in water from an external source stores it in the main refrigerant where heat is extracted from the water source and the water is then returned to the external source.
Standing column well A standing column well heat pump is much like an open loop heat pump except it is designed to pull in water from deep within a well and exchange it for heat in the main refrigerant where it is then returned back into the well while traveling down it exchanges heat with the bedrock.
How does a geothermal heat pump work in large buildings?
A geothermal heat pump works in all different ways each make varying depending on its best function for what it is replacing. For example a heat pump moves anywhere in between three and five times faster than the heat or electricity in which it consumes it is actually outputting more energy than it is inputting this causes the efficiency of thermals to exceed anywhere between 100 and 200 percent. While your average electric device will typically never exceed 100%. This proving that a geothermal heat pump will always exceed the performance of the electric device it is equivalently designed against for a specific building or structures size.
What is the environmental impact of geothermal heat pumps?
The impact is to be frank very positive, producing less greenhouse gases, and built to be biodegradable and non toxic in the external sources. But the negative side is that the refrigerant system uses a type of refrigerant which is actually a cause of depleting the ozone layer. This refrigerant is called chlorodiflouromethane, it is harmless when used properly but leaks can cause the ozone layer to deplete. But dont worry this product has been favored out and is being replaced with a more environmentally safe product.
by: v.Owen
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