A. Brine Source Heat Pump: ground heat as the heat source
B. Air Source Heat Pump: air as the heat source-air /water heat pump
External installation Internal installation
C. Water Source Heat Pump: ground water as the heat source–water/water heat pump
- What is Geothermal Energy?
Temperature of Shallow Crust (upper 10ft.) 55-75 F
Up to 14,400 F (8,000 C) at Molten Core
(approximate 4000 meter to center of core)
- Brief History of Geothermal Energy
Use by Romans-
Hot Spas; Hot Running Water
Early 1800s – Yellowstone hot Spring
and Hot Spring Alkansas
1830 1st Commercial Use; Asa Thompson bath in Wooden Tub for $1
- Geothermal Potentials
Seasonal variations measurable until 10-15 depth
At 10 meters depth the ground is approximately 1K warmer than the yearly
than the yearly average ambient temperature
In high depth the temperature rises 2.5-4K each 100meter
For passive cooling depths of 30-100 meters are suitable
A heat pump is an electrical device that extracts heat from one place and transfers it to another. The heat pump is not a new technology; it has been used around the world for decades. Refrigerators and air conditioners are both common examples of this technology.
The heat pump cycle is fully reversible, and heat pumps can provide year-round climate control for your home – heating in winter and cooling and dehumidifying in summer. Since the ground and air outside always contain some heat, a heat pump can supply heat to a house even on cold winter days.
An air-source heat pump absorbs heat from the outdoor air in winter and rejects heat into outdoor air in summer. It is the most common type of heat pump found in homes at this time. However, ground-source (also called earth-energy, geothermal, geoexchange) heat pumps, which draw heat from the ground or ground water, are becoming more widely used.