geothermal exchange heat pumps
DESCRIPTION
Geothermal Exchange Heat Pumps. Jordan Harris 4M-C. Objectives. What is a HEAT PUMP? What is Geothermal exchange? Air vs. water Closed vs. open system Heating and cooling mode Sources. What is a heat pump. Moves heat rather than burning a fuel Opposite of Air conditioning - PowerPoint PPT PresentationTRANSCRIPT
Geothermal Exchange Heat Pumps
Jordan Harris
4M-C
Objectives
• What is a HEAT PUMP?
• What is Geothermal exchange?
• Air vs. water
• Closed vs. open system
• Heating and cooling mode
• Sources
What is a heat pump
• Moves heat rather than burning a fuel
• Opposite of Air conditioning
• Removes heat from source to deliver to desired heating area
• Fluid expanded, forcibly condensed to release heat, gains more
What is Geothermal Exchange
• Using the Earth as a heat source or a heat sink
• Consists of a loop of pipe, a compressor, and a pump
• Pipe is installed below the frost line• Ideal, temperatures below ground are
fairly constant• 70% of energy used is renewable energy
from the ground
Air vs. Water
• Traditional air conditioning uses air as a medium• Geothermal exchange pumps use water • Water can store 3472 times more heat than air• Water requires less energy to move,
One cubic foot of water
3472 cubic feet of air
Open vs. Closed Loops
• Open– Loop between a water
source and a discharge area
– Higher performance– Water needs to be
analyzed and treated (for corrosives, acid, abrasives)
– Cost of pumping is higher
Open vs. Closed Loops
• Closed – Water is re-circulated– No new water is
introduced– Heat is transferred
through the walls of pipe
– High installation cost, low pumping cost
Heating and Cooling
• Heating– Fluid is drawn from the
earth - is expanded to vapour in heat exchanger – forced to compress in compressor releases heat – returned to earth
• Cooling– Opposite.
Sources
• http://www.geothermalheatpump.com/how.htm
• http://en.wikipedia.org/wiki/Geothermal_exchange_heat_pump
• http://home.howstuffworks.com/question49.htm
• http://home.howstuffworks.com/ac.htm