Geothermal Heating And Cooling - Harnessing the Earth's power

Epa - Geothermal Heating And Cooling - Harnessing the Earth's power

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Imagine an Hvac and water heating system that can save 20% to 50% on a building's vigor costs while minimizing Co2 and carbon emissions. Dream a system that is more reliable, is 2.5 to 4 times more efficient, provides the bottom life cycle cost, and a high degree of produce flexibility.

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Where can you find such a system? You need look no added than right under your feet. The earth is a huge vigor warehouse gadget that absorbs 47% of the sun's energy. When combined with the constant upward flow of heat from the earth's red hot interior, the consequent is geothermal energy. Geo = earth, Thermal = heat. This clean, renewable vigor is stored in masses of rock in the upper six miles of the earth's crust. In nearly every state of the Union, there is sufficient geothermal vigor to heat, cool and contribute hot water for all types and sizes of buildings.

Temperatures near the earth's covering remain relatively constant all year round - warmer than covering air in the winter, and cooler than covering air in the summer. Geoexchange systems (or ground coupled heat pumps) passage the earth's heat while the winter and publish it to the building interior. In the summer the process is reversed, drawing the hot air from inside the building and transferring to the earth. Nearly all geoexchange systems on the store can also contribute low cost hot water - added expanding their operational efficiency

According to the Epa and Doe, geoexhange systems are the most vigor efficient, environmentally clean and cost-effective space conditioning systems available. They rate the systems 40% more effective than air source heat pumps 48% greater than gas furnaces and 75% greater than oil furnaces. Though geoexchange units do need a power source, they have a much greater vigor efficiency ratio. In heating mode, the system will move at least three units of solar vigor from the ground for each unit of electricity used.

There are three requisite components in a geoexchange system: The ground loop, the heat pump unit and the heat distribution channel

Ground Loop

For most buildings, the relationship to the geothermal heat source is made via a 'closed' loop configuration. A series of flexible, high-density polyethylene pipes are installed under the ground in horizontal trenches or vertical holes. A fluid (water or a aggregate of water and environmentally benign antifreeze) is circulated through the loops, attractive the earth's heat as it passes through the pipes and transporting it to the geoexchange unit inside the building. In cooling mode, the building's interior hot air is absorbed by the unit, movable back through the loops and absorbed into the surrounding earth. Post-installation the holes or trenches are backfilled, then covered with native landscaping, grass or even parking lots.

Horizontal trenching is usually the most cost effective configuration when sufficient space is ready and trenches are easy to dig Vertical drilling is used when the land area is limited, or where the soil is too shallow for horizontal trenching. The loops should be installed by professionals who consequent procedures established by the International Ground Source Heat Pump relationship (Igshpa), and are either certified by Igshpa or can prove equivalent training by manufacturers or other recognized authorities.

Geoexchange Heat Pump

The most ordinarily used unit is the singular container water-to-air heat pump, which combines heat exchanger, refrigerant piping, operate valve, compressor, air coil, and fan, in one singular enclosure about the size of a small gas furnace. The singular container produce is a major advantage over the "split" system used for air- source heat pumps. There are numerous manufacturers, brands and models of heat pumps available. They are rated by the Air Conditioning and Refrigerant produce according to their respective Coefficient of operation (heating) and vigor Efficiency Ratio (cooling). vigor Star excellent geoexchange pumps consume 40-60 percent less vigor than a accepted heat pump.

Heat Distribution Channel

Conventional ductwork is ordinarily used to distribute heated or cooled air from the geothermal heat pump throughout the building. A well-designed geoexchange system allows building occupants literal, climatic characteristic operate by room or by zone, with ideal humidity levels. The system requires no flue or chimney. There is no rooftop equipment or chilling towers that add weight to the buildings or limit alternative roof styles such as vegetated roofing. Their ageement size requires significantly less interior warehouse space. The heated water coursing through the system can be utilized for added building uses, such as heating swimming pools and spas, melting sidewalk and parking lot ice and snow- even providing water for a car wash!

The largest market geoexchange system in the world is the Waterfront Office and Galt East Hotel complex in Louisville, Kentucky. This 1.7 million plus quadrate foot complex is fitted with a 2,700 ton capacity geoexchange system, at a cost of ,500 per ton. The project boss estimates that a accepted Hvac system with centrifugal chillers, cooling towers and insulated pipes would have cost from ,000 to ,000 per ton. Using Geoexchange technology freed up about 25,000 quadrate feet of added market space that would otherwise have been used for accepted equipment rooms. vigor savings are estimated at ,000 per month while allowing private climatic characteristic operate to each room or suite. Yearly maintenance costs are about 5 cents per quadrate foot versus much higher median costs with accepted Hvac systems.

Best of all, complaints about heating and cooling "have been virtually non-existent, whereas before we had frequent comments about lack of sufficient comfort"

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