How Geo Thermo Heating Works And What Influences Its Efficiency

At a depth of about four feet below the surface of the Earth, the temperature of the Earth is a remarkably constant 45 to 58 degrees Fahrenheit, no matter where on this planet you check this. This fact is utilized in geo thermo heating systems to advantage for heating buildings cost effectively during winter. Secondly, the heat energy available from the Earth is abundant and renewable. Thirdly, the Earth stays cooler than the surrounding air in summer and warmer than the air in winter.

A geo thermo heating system utilizes all of the above to effect much more savings in energy usage costs in winter when compared with air conditioning systems. It does so with the inclusion of a geosource heat pump. The heat pump is called so because it uses the Earth as a source of heat. It is a compressor which uses a closed loop refrigerant to transfer heat from and to its surroundings.

In geo thermo heating during winter, the colder refrigerant takes heat through a heat exchanger from the antifreeze water circulating through piping buried in the warmer Earth. It then transfers it through the heat pump to the colder air circulating the home. The compressor keeps the refrigerant in circulation in the piping connected to it. It forms the central part of any geothermal heating system. It increases the temperature and pressure of the refrigerant and reduces its volume to move it through the piping.

Part of the antifreeze water circulating piping is buried below ground level. The water piping above ground level is insulated to prevent the leakage of heat. The piping insulation influences the efficiency of the heating system to a significant extent.

The heat pump coefficient of performance (COP) decides the energy efficiency of the heat transfer. The COP is the ratio of the heating provided to the electrical energy consumed under designated operating conditions. The higher the COP of the heat pump, the higher is the system efficiency. The efficiency of the system is also influenced by cycling losses. These are imposed due to start-up or shut-down losses. To keep these losses to the minimum means never oversizing the heating system.

The geothermal heating system also includes a condenser (a heat exchanger) through which the hot compressed gaseous refrigerant is condensed by transferring the heat from it to the air circulating the home or building.

The pros and cons of geothermal heating systems are influenced primarily by the efficiency and quality of the equipment sourced from geo thermo companies and piping insulation requirements. These depend whether the equipment has been procured from reputed geothermal climate system manufacturers or not. Geo thermo heating systems provide free heat energy taken from the Earth and therein lie their energy cost benefits.

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