geothermal heat pumps - johnsonconsults.com · a geothermal heat pump circulates water through a...
TRANSCRIPT
Geothermal Heat Pumps
A Proven Renewable Energy Technology
While Earthtravels through Space…
47% of the solar energy falling on our planetis absorbed by the Earth’s surface…
… maintaining a nearly constant temperaturethroughout the year just below ground
US Deep Ground Temperatures
Geothermal Heat PumpBasic PrinciplesBasic Principles
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
…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
…using Heat Pump Technology
A geothermal heat pumpcirculates water through asealed underground piping loopwhere it is naturally warmed (orcooled) by the earth
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)
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
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
Geothermal Heat Pumps
Self-containedheating, cooling andhot water
Residential Site EnergyGeothermal Heat Pump System
Total site energyTotal site energyconsumption iscut in half
Geothermal Heat PumpInstallation MethodsInstallation Methods
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
Horizontal Closed-Loop
A piping array is installed in trenches cut 3 to 5 feetdeep and hundreds of feet in length
Surface Water Closed-Loop
A piping array is submerged in a pondor lake at least 8 feet deep
Ground WaterOpen-Loop
Well water from an underground aquifer ispumped through the geothermal heatpump and then returned to the aquifer ordischarged to the surface
Geothermal Heat PumpsCase StudiesCase Studies
Geothermal Heat Pumps
Widely used in Homes…
1300 Square Foot Habitat for Humanity Home
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
Geothermal Heat Pumps
and in Commercial Buildings
The Oklahoma State Capitol uses over 600 geothermal heat pumps
Garrett Office BuildingsEdmond, Oklahoma
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
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
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
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