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Geothermal heat pumps are like to normal heat pumps, but use the ground as a replacement for of outside air to provide heating, air conditioning and, in most suitcases, hot water. Because they use the earth’s natural heat, they are among the most efficient and comfortable heating and cooling technologies currently unfilled.

Ground sourced heat pumps simply go energy from one place to another.

Geothermal Basics: Ground source heat pumps (GSHPs) are electrically powered systems that tap the stored energy of the greatest solar collector in the earth. These systems use the earth’s relatively constant temperature to provide heating, cooling, and hot water for homes and commercial building.

How Geothermal Energy works

The heat pump system uses solar energy stored in the earths crust. Energy is transferred to and from the earths surface by solar radiation, wind and rainfall. As a consequence of this solar energy, the earths temperature at depths greater than 10 meters remains constant, and is comparable to the annual average air temperature. Between the surface and a depth of 2.5 meters (maximum depth for a horizontal loop) the ground temperature will swing above and below the annual average air temperature , depending on the geographic place, soil type an moisture levels.

Because of its own insulation, the earth’s soil temperature is more moderate year round than outside air.

Ground sourced heat pumps simply go energy from one place to another. The process of which is clarified on the image below:

An Evaporator (ground loop heat exchanger) transfers the heat from the ground into the fluid circulating in the loop. At this point the energy in the ground loop transfers through the evaporator within the heat pump and into a CFC free refrigerant. A compressor increases the pressure of the working fluid, which causes the temperature to rise. This energy is transferred over the condenser and into the distribution circuits, where hot water is circulated through the under floor circuits and in turn heating the property. The refrigerant now passes through an expansion valve and the process starts again

Types of Ground Loop

Ground source heat pumps can be categorized as having closed or open loops, and persons loops can be installed in three ways: horizontally, vertically, or in a pond/lake. The type chosen depends on the unfilled land areas and the soil and rock type at the installation site. These factors will help establish the most economical choice for installation of the ground loop.

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Autumn is approaching and that means colder days ahead. But, Australia is blessed with an amazingly moderate climate where even our coldest days are nothing compared to other regions in the world. This means that Australian residents can take advantage of all natural low emissions heating in their green home.

As well as insulation and energy efficiency, there are other innovative heating thoughts to keep your home toasty warm for the winter.

Eco Home Tip #31 – Seal up draughts – Place snakes under door jambs, get weather stripping for your windows. Heavy curtains also help keep in the heat and keep out the cold. You’ll be amazed at how cosy a room can be without any heating at all.

Eco Home Tip #32 – Look beneath your feet – the soil beneath you home acts as a natural insulator, keeping the ground warm all year round. By employing a geothermal heat pump, your home can be take advantage of this natural heat all through the colder months. In a geothermal system, liquid is circulated in pupes that run beneath your home. As the liquid gets warmer, it is pumped up to a heat condensor where the heat is released into your inner heating system.

Eco Home Tip #33 – Keep it low – Switch your thermostat down a single degree. When we come in from the cold, we’re very likely to crank the termostat up much privileged than necessary. Remember that every degree lower on your thermostat can potentially save up to 10 per cent on your heating. Throw on a long jumper as a replacement for.

Eco Home Tip #34 – Cut your system down to size – as with air conditioning, don’t go overboard with your heating. You’ll be amazed at what a single space heater will do.

Eco Home Tip #35 – Look for the Energy Star – As with all appliances, energy star ratings give a excellent suggestion of the energy efficiency of the appliance. Energy star rates furnaces, boilers and heat pumps for inner heating in your home.

For more green thoughts for your eco home, visit the Green Pages at www.thegreenpages.com.au