Geothermal Heat Pumps - johnsonconsults.com · A geothermal heat pump circulates water through a...
Transcript of Geothermal Heat Pumps - johnsonconsults.com · A geothermal heat pump circulates water through a...
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Geothermal Heat Pumps
A Proven Renewable Energy Technology
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While Earthtravels through Space…
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47% of the solar energy falling on our planetis absorbed by the Earth’s surface…
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… maintaining a nearly constant temperaturethroughout the year just below ground
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US Deep Ground Temperatures
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Geothermal Heat PumpBasic PrinciplesBasic Principles
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The Earth is the Source ofHeat in Winter…
Outdoor airdesign temperature:-5°F72°F72°F
50°F
A geothermal heat pump transfers undergroundheat into the building to provide heating
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…and an Efficient Place toReject Heat in Summer…
Outdoor airdesign temperature:95°F74°F74°F
50°F
A geothermal heat pump transfers heat fromthe building into the ground to provide cooling
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…using Heat Pump Technology
A geothermal heat pumpcirculates water through asealed underground piping loopwhere it is naturally warmed (orcooled) by the earth
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Geothermal Heat Pump Efficiency
1 kWh of energyfrom the grid Yields:
4-6 kWh of energyfor the building
Plus:3-5 kWh of energy
from the earth
for the building
400-600% Efficient(COP of 4-6)
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Geothermal Heat PumpsExchange Heat between Air and Water
$1 Worth of Electricity toOperate the Compressorand Fan
$4$4$5$5
Air Out100 F
WaterOut40 F
WaterIn
45 F
FanPump
Moves $4 Worth of Heatfrom the Water
Delivering $5 Worth ofHeat into the Air
Heating Mode Shown
Heat can be “pumped uphill”meaning delivered at a highertemperature than the source
$1$1
Air In70 F
Compressor
WaterCoil
Air Coil
Revers ingValve
Expans ionValve
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Geothermal Heat PumpsHeat or Cool on Demand and also
Produce Hot WaterAir Out
58 F
WaterOut85 F
WaterIn
75 F
Fan
Air Coil
Operates on the SamePrinciple as a Refrigerator
Cooling Mode Shown
160F
Hot water is producedwhenever the unit is operating Air In
80 F
Compressor
WaterCoil
Revers ingValve
Expans ionValve
HWIn
90 F
HWOut
120 F
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Geothermal Heat Pumps
Self-containedheating, cooling andhot water
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Residential Site EnergyGeothermal Heat Pump System
Total site energyTotal site energyconsumption iscut in half
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Geothermal Heat PumpInstallation MethodsInstallation Methods
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Vertical Closed-Loop
A pair of pipes with a special U-bend assembly at thebottom 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 feetdeep and hundreds of feet in length
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Surface Water Closed-Loop
A piping array is submerged in a pondor lake at least 8 feet deep
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Ground WaterOpen-Loop
Well water from an underground aquifer ispumped through the geothermal heatpump and then returned to the aquifer ordischarged to the surface
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Geothermal Heat PumpsCase StudiesCase Studies
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Geothermal Heat Pumps
Widely used in Homes…
1300 Square Foot Habitat for Humanity Home
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Habitat for HumanityHabitat for HumanityAverage of 16 HomesAverage of 16 Homes -- Total Site Energy Use in 2007Total Site Energy Use in 2007
47% Site Energy Savings47% Site Energy Savings
25.00
30.00
35.00
40.00
kW
hp
er
M2
50% Site Energy Savings50% Site Energy Savings
-
5.00
10.00
15.00
20.00
kW
hp
er
M
Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07
Geothermal Gas Furnace w A/C
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Geothermal Heat Pumps
and in Commercial Buildings
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The Oklahoma State Capitol uses over 600 geothermal heat pumps
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Garrett Office BuildingsEdmond, Oklahoma
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Garrett Office BuildingsGarrett Office BuildingsAnnual Energy Use 2006Annual Energy Use 2006--20072007
60
70
80
90
kB
tup
er
Sq
uare
Fo
ot
47% Site Energy Savings47% Site Energy Savings
-
10
20
30
40
50
kB
tup
er
Sq
uare
Fo
ot
VAV System Geothermal
Total
Electricity
Gas
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Garrett Office BuildingsGarrett Office BuildingsAnnual COAnnual CO22 Emissions 2006Emissions 2006--20072007
40
45
50
Eq
uiv
ale
nt
per
Sq
uare
Fo
ot
28% Carbon Emissions Reduction28% Carbon Emissions Reduction
20
25
30
35
Lb
s.C
O2
Eq
uiv
ale
nt
per
Sq
uare
Fo
ot
VAV System Geothermal
Gas
Electricity
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4.0
4.5
5.0
5.5
6.0
Watt
sp
er
Sq
uare
Fo
ot
VAV System
Geothermal
Garrett Office BuildingsMonthly Peak Demand
35% Peak Demand Reduction35% Peak Demand Reduction
2.0
2.5
3.0
3.5
Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07
Watt
sp
er
Sq
uare
Fo
ot
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Thank You!
John Dibble
P.O. Box 1613Sandpoint, Idaho 83864
Ph. 208-255-7660Fax 208-255-7670
ClimateMaster, Inc.7300 S.W. 44th St.
Oklahoma City, OK 73179
A subsidiary of LSB Industries, Inc.AMEX symbol: LXU
www.climatemaster.com