1. IMPROVING THE EFFICIENCY GEOTHERMAL or GROUND SOURCE HEAT PUMPS

3. Geothermal heat pump collects the Earth's natural heat through pipes, called a loop, installed below the surface of the ground or submersed in a pond or lake. Fluid circulates through the loop. Compressor and a heat exchanger concentrate the Earth's energy and release. Ductwork distributes the heat to different rooms.

4. GEOTHERMAL or GROUND SOURCE HEAT PUMPS All heat pumps have an outdoor unit (called a condenser) and an indoor unit (an evaporator coil). A refrigerant carries the heat from one area to another. Compressed-high temperature- high-pressure liquid. Allowed to expand, it turns into a low temperature, low pressure gas. The gas then absorbs heat.

5. GEOTHERMAL or GROUND SOURCE HEAT PUMPS Heat pump system extracts heat from outdoor air and circulates that air through your home's ductwork by a fan. Geothermal heat pumps - similar to ordinary heat pumps They rely on the stable, even heat of the earth to provide heating. In summer the process is reversed for air conditioning.

6. GEOTHERMAL or GROUND SOURCE HEAT PUMPS Very efficient with a efficiency of 5 to 6.5 which can equate to [Heat Load x Operating Hrs. x $ per unit] / [3,400 x efficiency ] = cost Therefore approximately 70 percent of the energy used in a geothermal heat pump system is renewable energy ie the ground. Mother nature’s constant temperature is what makes geothermal heat pumps efficient.

7. Mother Nature

8. GEOTHERMAL or GROUND SOURCE HEAT PUMPS Mother Nature

9. GEOTHERMAL or GROUND SOURCE HEAT PUMPS Types of Loops: Geothermal heat pump Not do-it-yourself projects. International Ground Source Heat Pump Association (IGSHPA). Designing the length of the loop depends upon a number of factors: Loop configuration based on  heating and air conditioning load;  local soil conditions and landscaping;  and the severity of your climate.

10. GEOTHERMAL or GROUND SOURCE HEAT PUMPS Horizontal Ground Closed Loops  Most cost effective if excavation is easy and adequate space requirements  3’ to 6’ cover  Lay a series of parallel plastic pipes.  400’ to 600’ feet for each ton of heating and cooling.  Fluid runs through the pipe in a closed system.

11. GEOTHERMAL or GROUND SOURCE HEAT PUMPS

13. Vertical Ground Closed Loops  Used where there is not adequate space  Vertical holes 150’ to 450’ deep ie wells  Single loop of pipe with a U-bend at the bottom is inserted before the hole is backfilled.  Pipe is connected to a horizontal underground pipe to and from the indoor exchange unit.

14. GEOTHERMAL or GROUND SOURCE HEAT PUMPS Pond Closed Loops  Most economical when near a body of water shallow pond, lake or stream.  Fluid circulates underwater through polyethylene piping in a closed system,  Pipes can be coiled in a slinky shape to fit more of it into a given amount of space.  In a few places, developers have installed large community loops.

15. GEOTHERMAL or GROUND SOURCE HEAT PUMPS Ground Source Heat Pumps offer great benefits:  Simultaneously heat & cool different parts of the same building  Very quiet  Can be set up in multiple zones, with each zone having an individual room control  Greater freedoms in building design due to 50-80% less mechanical room space  No outside equipment to hide  Pipes have 50-year life expectancy  All electric, which eliminates multiple utility services  Expel boiler and chiller maintenance  Ground heat exchanger is maintenance free and will last 40+ years