Heat pumps

Heat pump basics – learn about heat pump principals:

Ground source (geothermal) heat pumps are electrically powered systems that can provide cooling, heating and hot water much more efficiently and less expensively than conventional heating and air-conditioning technologies using ground’s relatively constant temperature. There are two main categories of ground source heat pumps – open loop, and close loop, but major part of all household installations is the closed loop system. The closed loop geothermal heating system circulates the water-based antifreeze solution through a series of pipes buried in the ground, transferring heat to or from the ground, depending on the mode heat pump is working in.

During the summer season heat pump functions as air conditioner extracting the heat from the air inside the building, then transferring it to the antifreeze in the pipes and then dumping it to the relatively cooler earth. During the winter season this process is reversed – the heat pump extracts heat from relatively warmer earth, transfers it to the antifreeze in the pipes and rejects it to the air inside the building. Excessive heat extracted from the air inside the building in the cooling mode during the summer can be used to produce domestic hot water.

For larger residential building or houses a multiple heat pump systems can be used creating a possibility for a multiple heating/cooling zones.

One of the most important characteristics of the geothermal heat pump in terms of the residential heating and cooling is that the efficiency of the heat pump and the energy amount it consumes are directly related to the temperatures between which it operates. The difference between the temperature where the heat is absorbed (the source) and the temperature where the heat is rejected (the sink) is called the lift. The bigger the lift, the more input power is required by the pump. This form the basis of efficiency advantage of the geothermal heat pump (ground source) and the air source heat pump. The air source heat pump must extract the heat from cold outside air during the heating season and reject the heat to the hot outside air during the cooling season. Geothermal ground source heat pump extracts heat from relatively warm ground during winter, and rejects hot air to the relatively cool ground during summer. So the geothermal heat pump works in smaller lift or temperature range than the air source heat pump thus being more efficient and requiring less energy to operate.

Learn more on how geothermal heat pump works.

This entry was posted on Tuesday, December 7th, 2010 at and is filed under Geothermal Heating and Cooling. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

2 Responses to “Heat pumps”

  1. Geothermal Equipment Says:

    […] 1. Heat Pump […]

  2. Geothermal heat exchanger Says:

    […] Geothermal Heat Pump – the ground source heat exchanger and the heat pump need each other to operate, as one will be useless without the other. […]

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