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GROUND-SOURCE HEAT PUMPS AND GEOTHERMAL DIRECT USE

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... this ground temperature ... GHP systems take advantage of this resource ... Annotated Geothermal Bibliography GIS Layers - Resource, Land Ownership, Geology, ... – PowerPoint PPT presentation

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Title: GROUND-SOURCE HEAT PUMPS AND GEOTHERMAL DIRECT USE


1
GROUND-SOURCE HEAT PUMPS AND GEOTHERMAL DIRECT USE
  • Workshop
  • March 22 23, 2006
  • Salt Lake City, UT

Utah Geothermal Working Group U.S. DOE
GeoPowering the West Sound Geothermal OIT
Geo-Heat Center
Washington State Univ Energy Prog UU Energy
Geoscience Inst. Utah Geological Survey SEP
2
Ground-Source Heat Pumps (GHP)
  • The shallow Earth maintains a nearly constant
    temperature between 50 and 60F (1016C).
  • Like a cave, this ground temperature is warmer
    than the air above it in the winter and cooler
    than the air in the summer.
  • GHP systems take advantage of this resource to
    heat and cool buildings.

3
GHP Systems
  • Three parts 1. the ground heat exchanger, 2.
    the heat pump unit, and 3. the air delivery
    system (ductwork).
  • The heat exchanger is basically a system of
    pipes called a loop, buried in the shallow ground
    near the building.
  • A fluid (water/antifreeze) circulates through
    the pipes to absorb or relinquish heat within the
    ground, and deliver it to the GHP.
  • Ground-source heat pumps use less energy than
    conventional heating systems, since they draw
    heat from the ground. Affordable? Reliable?
    Convenient?
  • All areas of the United States have nearly
    constant shallow-ground temperatures, which are
    suitable for geothermal heat pumps.

4
Galt House East Hotel - Louisville, KY 750,000 sq
ft, 1,700 ton GHP
5
Canyon View High School Cedar City, Utah
  • GeoExchange System
  • vertical closed loop
  • 300 boreholes _at_ 300 deep
  • 233,199 ft2
  • 550 tons (1,953 kW)

6
Geothermal Direct-Use
  • Geothermal direct use dates back thousands of
    years, when people began using hot springs for
    bathing, cooking food, and loosening feathers and
    skin from game.
  • Today, hot springs are still used as spas. But
    there are now more sophisticated ways of using
    this geothermal resource.

7
Direct-Use Geothermal System
1.A production facility normally a wellto
bring the heated water to the surface. 2.A
mechanical systempiping, heat exchanger,
controlsto deliver the heat to the space or
process. 3.A disposal systeminjection well or
storage pondto receive the cooled geothermal
fluid.
8
Ada County Courthouse, Boise, Idaho
9
Milgro Nurseries
Milgro Nurseries, Newcastle, Utah Geothermal
Space Heating
10
Geothermal Aquaculture Fish Ladder near Twin
Falls, Idaho
11
Empire Energy Onion Processing Empire, NV
12
The Homestead Crater
The Homestead Crater 60 ft Dive Pool
13
GEOTHERMAL RESOURCES OF UTAH - 2004
Compiled by
Robert E. Blackett and Sharon Wakefield
Open-File Report 431 Compact Disk
Utah Geological Survey 2004
14
UGS OFR-431
  • Geology of Geothermal Resource Areas in Utah
  • Thermal Spring and Well Database ( 1,100)
  • Thermal Gradient Boreholes Database ( 980)
  • Annotated Geothermal Bibliography
  • GIS Layers - Resource, Land Ownership, Geology,
    Roads, Power Grid,

or For more information go to http//www.geology
.utah.gov/geothermal/
15
For more information about geothermal resources
in general Geothermal Resources Council P.O.
Box 1350, Davis, CA 95617 Tel (530) 758-2360
Fax (530) 758-2839 http//www.geothermal.org/
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