Plastic pipe ground loop minimum requirements
The following table assumes that the ground temperature is 45 degrees Fahrenheit. A warmer temperature may produce shorter cycles.
Desuperheater coils
Most heat pump manufacturers offer an additional heat exchanger either as part of the GHP or as an option. The desuperheater coil and pump are plumbed to your hot water tank and operate to provide domestic hot water whenever the heat pump operates. Our Passive cooling “DC” series units provide hot water only in the heating mode.
Performance Comparisons
The performance or COP of all the GHP systems as determined in the US by ARI 325 & 330 standards or in CANADA the CSA 446 M-94 will normally be in the range of 3 to 3.3 and is largely dependent on the Entering Source Water Temperature (ESWT) and the Entering “Sink” Water to the Heat Pump.
Other Factors to consider
Although the COP of a heat pump is a factor in selecting the GHP other factors such as proven durability, quietness, long life compressor, freeze resistant water, coil, and easy accessibility to replacement components are equally important in selecting the manufacturer of your Geothermal Heat Pump.
Pricing a Geothermal Heat Pump
Estimating the price a GHP system can be made relatively simple by breaking the entire system into it’s component parts. Make sure your dealer has sized the heat pump for 100% heating capability using a commercial software program or other acceptable technique. Check with your dealer to make sure you understand exactly what he is quoting on.
Additional information on loops
An open loop well
Water based system has the following subsystem:
- Water Well (can use the same one for drinking water)
- Submersible well pump system
- Heat Pump
- Heat Pump Installation
- Electrical Wiring
- Back-up electrical plenum heater
- Duct system (or) radiant floor heating system
- Return well or disposal field
Closed loop system water based
Closed loop water based system has the following subsystem:- Heat Pump
- Heat Pump Installation
- Electrical Wiring
- Back-up electrical plenum heater
- Duct system (or) radiant floor heating system
- Horizontal or vertical ground loop system
- Loop pump circulator kit
- Antifreeze solution