So called global warming is just a secret plot by wacko tree huggers to make America energy independent, clean our air and water, improve the fuel efficiency of our vehicles, kick start 21 st century industries and make our cities safer and more livable. Don’t let them get away with it. Chip Giller, Grist.Org
During this seminar we will discuss the design and operational characteristics of a geothermal HVAC system. We will explore the different configurations of a geothermal system including standing column, horizontal loop, vertical loop and pond loop systems. We will compare geothermal HVAC systems with conventional HVAC systems relative to first costs, operating costs, functionality and maintenance focusing on commercial buildings.
Learning Objectives:
-Develop an understanding of how a geothermal heat pump system operates.
-Have the ability to assess if a building is a candidate for a geothermal heat pump system.
-Understand the environmental, operational and cost benefits of a geothermal heat pump system.
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Transcript
So called global warming is just a secret plot by wacko tree huggers to make America energy independent, clean our air and water, improve the fuel efficiency of our vehicles, kick start 21st century industries and make our cities safer and more livable. Don’t let them get away with it.
Chip Giller, Grist.Org
Geothermal Systemsfor
Commercial Buildings
Geothermal Systemsfor
Commercial Buildings
Presenters:
Brian Smith, PE, LEED APPrincipal, Allied Consulting Engineering Services
Steve Sakakeeny, CPG, LSP, CHMM Principal, SAK Environmental
D.J. Quagliaroli President, DRAGIN Geothermal Well Drilling
Allied Consulting Engineering Services, Inc. is a Registered Provider with the American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.
This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing an any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
Copyright Materials
This presentation is protected by US and International copyrightlaws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited.
Develop an understanding of how a geothermal heat pump system operates.Have the ability to assess if a building is a candidate for a geothermal heat pump system, including technical and regulatory obstacles.Understand the environmental, operational and cost benefits of a geothermal heat pump system.
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Loops are installed in trenches 5-10 feet below surface.
Requires 2,500 square feet per ton of cooling.
Generally installed in areas with moist sand or dirt.
Must understand hydrology.
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Boreholes are drilled several hundred feet deep.
Requires 200-250 linear feet per ton of cooling.
Geothermal loop is installed directly into a pond or other body of water near the building.
Size and depth of pond must be analyzed to ensure sufficient capacity.
Man made ponds/lakes are often installed to accommodate a pond loop simultaneously adding to the aesthetics of the property.
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Wells are drilled 1,000 – 1,500 feet deep.
Generally installed in areas with shallow bedrock (within 200’)
Heat transfer medium (water) comes into direct contact with heat sink/source (rock), resulting in higher efficiency than closed systems.
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From a higher temperature to a lower temperature
Heat flows downhill
Let’s take 1 pound of water at 80°F and heat it to 90°F by adding 10 BTU
10 BTU
Now let’s take 1 pound of water at 90°F and let it cool to 80°F and give up 10 BTU
10 BTU
What if we could cool 1 pound of water from 50°F to 40°F?
Heat
We would get 10 BTU.
10 BTU
What happens when we put heat into water at 212°F ?
Heat
Everyone knows Water boils at 212°F.
It takes 970 BTU to change 1 pound of water at 212°F to 1 pound of steam at 212°F.
970 BTU
In Denver, Colorado, water boils at 202°F.
In the olden days, before microwave ovens,
folks used a Pressure Cooker to cook foods faster.
Water boils at 240 °F at 10 PSIG
250 °F at 15 PSIG
In the classic high school physics experiment water can be made to boil at any temperature by reducing the pressure.
This concept is the basis of modern air conditioning.
Except air conditioners don’t use water they use Halogenated Chloro Fluoro Carbons like Chlorodifluoromethane and Zeotropic blends of Fluorinated Halocarbons like difluoromethane and pentafluoroethane.