geothermal heat pumps
Post on 30-Dec-2015
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Geothermal Heat Pumps
A Proven Renewable Energy Technology
While Earth travels through Space…
…it Absorbs Energy from the Sun
This natural Energy Collection and Storage System captures nearly half of the Solar
Energy falling on Earth…
…thus maintaining a nearly Constant Temperature throughout the year just below the surface
Water is an incredibly efficient medium for transporting Thermal Energy
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)
Geothermal Heat PumpBasic Principles
The Earth is the Source of Heat in Winter…
Outdoor air design temperature:10°F in winter
72°F
60°F
Insulating layer of earth
A geothermal heat pump takes heat from the earth during winter and transfers it into the building
…and an Efficient Place to Reject Heat in Summer…
Outdoor air design temperature:100°F in summer
72°F
60°F
Insulating layer of earth
A geothermal heat pump cools the building in summer by rejecting heat into the earth
A geothermal heat pump is connected to a sealed water piping loop buried in the earth near the building
When the warm or cold water exiting the heat pump is pumped through the loop, it is naturally cooled or warmed by the earth surrounding it
60°F
Insulating layer of earth
…using Heat Pump Technology
Geothermal Heat Pump Efficiency
One unit of energy from the grid
Plus:3-5 units of energy
from the earth
Yields:4-6 units of energy
for the building
400-600% Efficient
Heat Pumps Are All Around Us…
Air conditioners and air-source heat pumps transfer heat from inside houses to the air outside.
Refrigerators transfer heat from food into the kitchen.
HEAT
BB
B
HEAT
Residential Site EnergyConventional System
Over 70% of the energy consumed by a typical home is used for heating, cooling, and water heating
Residential Site EnergyGeothermal Heat Pump System
Total site energy consumption is reduced by 50%
Geothermal Heat Pumpsare the Most Efficient way to convert
Green Energy into Heating, Cooling and Water Heating
Making the most effective use of this precious resource
Geothermal Systems can be Classified as:
SolarGeothermalRenewableAlternative
Demand-SideConservation
Energy-EfficiencyZero-Ozone Depleting
Environmentally Responsible
Geothermal Heat PumpInstallation Methods
Vertical Closed-LoopA pair of pipes with a special U-bend assembly at the bottom is placed into bore holes from 150 to 400 feet deep
Horizontal Closed-Loop A piping array is installed in trenches cut 3 to 5 feet deep and hundreds of feet in length
Surface Water Closed-LoopA piping array is submerged in a pond or lake at least 8 feet deep
Ground WaterOpen-LoopWell water from an underground aquifer is pumped through the geothermal heat pump and then returned to the aquifer or discharged to the surface
Vertical Closed-Loop Installation
DrillingPipe LoopInsertion Fusing
Piping LoopsReady forUnit
InstalledHeat Pump
Geothermal Heat Pump Operation
Air In70 F
Air Out100 F
WaterOut54 F
WaterIn
60 F
Compressor
Fan
WaterCoil
Air Coil
ReversingValve
ExpansionValve
Geothermal Heat Pumps Exchange Heat between Air and Water
$1 Worth of Electricity to Operate the Compressor and Fan
Moves $4 Worth of Heat from the Water
Delivering $5 Worth of Heat into the Air
Heating Mode Shown
$5$5$4$4
$1$1Heat can be “pumped uphill”meaning delivered at a highertemperature than the source
Air In80 F
Air Out58 F
WaterOut95 F
WaterIn
85 F
Compressor
Fan
WaterCoil
Air Coil
ReversingValve
ExpansionValve
Geothermal Heat PumpsHeat or Cool on Demand and also
Produce Hot Water
Operates on the Same Principle as a Refrigerator
Cooling Mode Shown
Proven Technology •Millions of units installed world-wide in commercial and residential applications
Most Energy-Efficient and EnvironmentallyFriendly HVAC System Widely Available
•Water is a better heat transfer medium than air•Heat exchange loops tap the renewable energy of the Earth
Whole House Comfort•Heats or cools on demand•Better Comfort and humidity control•Easily adapted to zoned systems
Produces “Free” Hot Water
Uses EarthPure™ Refrigerant (ozone safe)
No Fossil Fuel•Improves safety•Eliminates service lines, flues, outside air intakes•No site emissions
No Outdoor Units•Better aesthetics•No noise•No vandalism or theft concerns
Long Equipment Life•Factory sealed systems•Indoor installation – no exposure to the elements•Moderate compressor loading vs. air-source systems
Self Contained Compact Units•Hidden within attics or installed in closets•Upflow, horizontal, or downflow single-package units•Split system and water-to-water units available
Geothermal systems are at work in thousands of buildings throughout the world
The Oklahoma State Capitol uses over 600 geothermal heat pumps
Our Planet Is Under AssaultFrom Many Forces
Our Planet is under Assault
from many Forces
Buildings are the Major Contributor
Industry377 MMTC
(25%)
Transportation482 MMTC
(32%)
Buildings658 MMTC(43%)
43% of U.S. Carbon Emissions 39% of U.S. Primary Energy Consumption
71% of U.S. Electricity
Global Pressures
53% of U.S. Natural Gas
1970-2020 (Exxon Mobile Projection)
There Are Many Solutions
There are Many Solutions
Geothermal Heat Pumpsare one of the Most Effective
and Deployableand…
… produce the lowest carbon dioxide emissions, including all source effects, of all available space-conditioning technologies
(EPA, 1993)
Using a Single Geothermal Heat Pump is Equivalent to
Planting an Acre of Trees
Using A Single Geothermal Heat Pump Is Equivalent to
Taking Two Cars off the Road
Since their introduction in the 1980’s, nearly 1 million
Geothermal Heat Pumps have been installed in the United States
This is the equivalent to planting 1 million acres of trees,
and of taking Two Millioncars off the road
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