Geothermal Exchange Heat Pumps

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Geothermal Exchange Heat Pumps

• Jordan Harris
• 4M-C

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Objectives

• What is a HEAT PUMP?
• What is Geothermal exchange?
• Air vs. water
• Closed vs. open system
• Heating and cooling mode
• Sources

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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

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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

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Air vs. Water
One cubic foot of water
3472 cubic feet of air

• 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,

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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

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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

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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.

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Sources

• http//www.geothermalheatpump.com/how.htm
• http//en.wikipedia.org/wiki/Geothermal_exchange_h
  eat_pump
• http//home.howstuffworks.com/question49.htm
• http//home.howstuffworks.com/ac.htm