Commercial Geothermal Cooling and Heating

A-1 Refrigeration is leading the way to helping Commercial clients install the latest technology like: Ground Source Heat Pumps (GSHPs) that are extremely cost effective, energy efficient, and the most environmentally friendly way of heating and cooling buildings. GSHPs are highly endorsed by the Department of Energy and the Environmental Protection Agency. GSHPs always deliver amazing quality air-conditioning and heating, on demand, in every season. GSHPs are extremely suitable for new construction as well as retrofits for older buildings. Their flexible design requirements make them a good choice for schools, high-rises, government buildings, apartments, and restaurants - almost any commercial property. Lower operating and maintenance costs, durability, and energy conservation make Ground Source Heat Pumps the smart choice for commercial applications.

Great Benefits

  • Simultaneously heat & cool different parts of the same building
  • Very quiet-users do not know when the system is operating
  • Multiple zone capabilities, with each zone having individual room control
  • Greater freedoms in building design due to 50-80% less mechanical room space
  • No outside equipment to hide, eliminating vandalism and roof top units
  • Earth Loop piping have a 50-year life expectancy
  • All electric, which eliminates multiple utility services
  • Ground heat exchanger is maintenance free

Great Savings

  • Very competitive on initial costs and lower lifecycle costs than most HVAC systems.
  • Savings of 25-50% on energy consumption
  • Higher efficiencies means lower peak demands, lowering your operating costs
  • Water heated with waste heat from air conditioning at no cost in the summer and at a substantial savings in the winter
  • Some utilities offer rebates or incentives to their customers who purchase GSHPs.

Environmentally Friendly

  • Conserve natural resources by providing efficient climate control and thus lowering emissions
  • Minimize ozone layer destruction by using sealed refrigeration systems, which seldom or never have to be recharged
  • Use underground loops to transfer heat, with no external venting and no air pollution
  • Very energy efficient, with the earth providing over 70% of the energy required to heat and cool

Types of Geothermal Ground Loops


Closed Loop Systems

Closed loop systems are becoming the most common type of loops. When properly installed, they are economical, efficient, and reliable. Water is circulated through a continuous buried pipe. The closed loop system is environmentally friendly because water in the loop prevents contamination to the external environment. The length of loop piping varies depending on ground temperature, thermal conductivity of the ground, soil moisture, and system design.

Horizontal

Generally the most cost-effective for small installations, horizontal closed loop works best particularly in new construction where sufficient land area is available. This type of geothermal heat installation involves burying pipe in trenches dug with backhoes or chain trenchers. Up to six pipes, usually in parallel connections, are buried in each trench, with minimum separations of a foot between pipes and ten to fifteen feet between trenches.


Vertical

Vertical closed loops are the preferred geothermal heat system for many situations. Vertical loops are used when the soil is too shallow for trenching and to minimize the disturbance to existing landscaping. For vertical closed loop systems, a U-tube (and, rarely, two U-tubes) is installed in a well drilled 100 to 400 feet deep. Because conditions in the ground may vary greatly, loop lengths can range from 130 to 300 feet per ton of heat exchange. Multiple drill holes are required for most installations, where the pipes are generally joined in parallel or series-parallel configurations.


Pond Loop System

A pond closed loop is a special kind of closed loop system. Where there is a pond or stream that is deep enough and with enough flow, closed loop coils can be placed on the pond bottom. Fluid is pumped in the same manner as a conventional closed loop ground system where conditions are suitable. The economics of this geothermal heat method are very attractive, and no aquatic system impacts have been shown.


Open Loop System

Open loop systems draw ground water from an aquifer through one well, passes through the heat pump's heat exchanger, and is discharged to the same aquifer through a second well at a distance from the first. Generally, two to three gallons per minute per ton of capacity are necessary for effective heat exchange. Since the temperature of groundwater is nearly constant throughout the year, open loops are a popular option in areas where they are permitted.

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