Ground Source Heat Pumps

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Ground Source Heat Pumps

• August 16, 2008

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While Earth travels through Space
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it Absorbs Energy from the Sun
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This natural Energy Collection and Storage System
captures nearly 50 of the Solar Energy falling
on Earth
thus maintaining a nearly Constant Temperature
throughout the year just below the surface
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Geothermal Heat Pump Systems combine Sun, Earth,
and Water using proven technology
to create the most energy-efficient,
environmentally clean, and cost-effective
space-conditioning system (according to U.S.
EPA 1993)
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Geothermal Heat PumpBasic Principals
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The Earth is the Source of Heat in Winter
Outdoor air design temperature 5F in winter
72F
Insulating layer of earth
50F
A geothermal heat pump takes heat from the
earth during winter and transfers it into the
building
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and an Efficient Place to Reject Heat in Summer
Outdoor air design temperature 100F in summer
74F
Insulating layer of earth
50F
A geothermal heat pump cools the building in
summer by rejecting heat into the earth
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using Heat Pump Technology
A geothermal heat pump is connected to a sealed
water piping loop buried in the earth near the
building
Insulating layer of earth
When water exiting the heat pump is pumped
through the ground loop, it is naturally warmed
(or cooled) by the earth surrounding it
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Geothermal Heat Pump Efficiency
One unit of energy from the grid
Yields 5 units of energy for the building
Plus 4 units of energy from the earth
Up to 500 Efficient
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Heat Pumps Are All Around Us
Air conditioners and air-source heat pumps
transfer heat from inside houses to the air
outside
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B
B
Refrigerators transfer heat from food into the
kitchen
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Residential Site Energy Conventional System
Over 70 of the energy consumed by a typical home
is used for heating, cooling, and water heating
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Natural Gas Prices - Colorado
Source Energy Information Administration
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Energy Cost ComparisonPropane vs. Geothermal
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Pay now or pay later
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Return of Investment

• Savings over 10 years87,459
• Savings over 20 years 321,817
• Savings over 30 years 909,920
• Break-Even 6.8 years
• Return on Investment 18.70

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The Process

• Heat load analysis
• System design and sizing
• Economic analysis (return on investment)
• Team selection
• Loop field installation
• System installation
• System commissioning

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Sample Heat Load
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Vertical Closed-Loop A pair of pipes with a
special U-bend assembly at the bottom is placed
into bore holes from 100 to 400 feet deep
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Horizontal Closed-Loop A piping array is
installed in trenches cut 3 to 5 feet deep and
hundreds of feet in length
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Ground Water Open-Loop Well water from an
underground aquifer is pumped through the
geothermal heat pump and then returned to the
aquifer or discharged to the surface
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Horizontal Loop Field Installation
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System Installation
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Geothermal Heat Pumps are one of the Most
Effective and Deployable
producing the lowest carbon dioxide emissions,
including all source effects, of all available
space-conditioning technologies(EPA, 1993)
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Braxis Energy Overview

• Braxis Energy was formed to bring to market
  sustainable energy solutions to help reduce
  global carbon emissions.

• Services Offered
• Strategic energy management consulting
• Geothermal ground source heat pump system design
  and installation management
• Heat load analysis and consulting
• Natural cooling system design and installation
  management
• Control systems for alternative energy

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Thank You Gordon Heinrich Braxis Energy,
Inc. [phone] gordon_at_braxisenergy.com