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Imagine an HVAC and water heating system that can save twenty% to 50% on a building’s energy costs while minimizing CO2 and carbon emissions. Imagine a system that is a lot of reliable, is 2.five to 4 times more economical, provides the bottom life cycle value, and a high degree of design flexibility.

Where will you discover such a system? You wish look no further than right beneath your feet. The planet is a huge energy storage device that absorbs 47% of the sun’s energy. When combined with the constant upward flow of heat from the planet’s red hot interior, the result is geothermal energy. Geo = earth, Thermal = heat. This clean, renewable energy is stored in masses of rock in the upper six miles of the planet’s crust. In nearly every state of the Union, there’s sufficient geothermal energy to heat, cool and provide hot water for all types and sizes of buildings.

Temperatures near the planet’s surface remain relatively constant all year spherical – hotter than outside air within the winter, and cooler than outside air in the summer. Geoexchange systems (or ground coupled heat pumps) extract the planet’s heat throughout the winter and unleash it to the building interior. Within the summer the method is reversed, drawing the new air from inside the building and transferring to the earth. Nearly all geoexchange systems on the market can additionally give low price hot water – further increasing their operational potency

According to the EPA and DOE, geoexhange systems are the foremost energy economical, environmentally clean and cost-effective house conditioning systems available. They rate the systems forty% additional efficient than air source heat pumps forty eight% bigger than gas furnaces and seventy five% larger than oil furnaces. Though geoexchange units do require an influence supply, they have a a lot of bigger energy efficiency ratio. In heating mode, the system can move a minimum of 3 units of solar energy from the bottom for each unit of electricity used.

There are three principal components in an exceedingly geoexchange system: The bottom loop, the warmth pump unit and the warmth distribution channel

Ground Loop

For many buildings, the connection to the geothermal heat supply is made via a ‘closed’ loop configuration. A series of flexible, high-density polyethylene pipes are put in beneath the bottom in horizontal trenches or vertical holes. A fluid (water or a mix of water and environmentally benign antifreeze) is circulated through the loops, absorbing 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, transported back through the loops and absorbed into the encircling earth. Post-installation the holes or trenches are backfilled, then lined with native landscaping, grass or even parking lots.

Horizontal trenching is usually the most cost effective configuration when adequate area is obtainable and trenches are easy to dig Vertical drilling is employed when the land area is limited, or where the soil is too shallow for horizontal trenching. The loops ought to be installed by professionals who follow procedures established by the International Ground Supply Heat Pump Association (IGSHPA), and are either certified by IGSHPA or can prove equivalent coaching by manufacturers or other recognized authorities.

Geoexchange Heat Pump

The most commonly used unit is the one package water-to-air heat pump, which combines heat exchanger, refrigerant piping, management valve, compressor, air coil, and fan, in one single enclosure about the dimensions of a small gas furnace. The one package style could be a major advantage over the “split” system used for air- supply heat pumps. There are many makers, brands and models of warmth pumps available. They are rated by the Air Conditioning and Refrigerant Institute in line with their respective Coefficient of Performance (heating) and Energy Efficiency Ratio (cooling). ENERGY STAR qualified geoexchange pumps consume 40-60 percent less energy than a customary heat pump.

Heat Distribution Channel

Typical ductwork is generally used to distribute heated or cooled air from the geothermal heat pump throughout the building. A well-designed geoexchange system permits building occupants precise temperature management by space or by zone, with ideal humidity levels. The system requires no flue or chimney. There’s no rooftop equipment or chilling towers that add weight to the structure or limit alternative roof designs like vegetated roofing. Their compact size needs significantly less interior storage space. The heated water coursing through the system will be utilized for extra building uses, like heating swimming pools and spas, melting sidewalk and parking heap ice and snow- even providing water for a automotive wash!

The most important commercial geoexchange system in the planet is that the Waterfront Workplace and Galt East Hotel complex in Louisville, Kentucky. This 1.7 million plus sq. foot advanced is fitted with a 2,700 ton capacity geoexchange system, at a value of $one,500 per ton. The project manager estimates that a typical HVAC system with centrifugal chillers, cooling towers and insulated pipes would have price from $a pair of,000 to $three,000 per ton. Using Geoexchange technology freed up about 25,000 sq. feet of additional commercial area that will otherwise are used for typical equipment rooms. Energy savings are estimated at $twenty five,000 per month while allowing individual temperature management to every room or suite. Annual maintenance costs are regarding 5 cents per square foot versus a lot of higher average prices with normal HVAC systems.

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