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![Page 1: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/1.jpg)
www.americansolar.com
Solar Energy Technologyfor Commercial Facilities
John ArchibaldAmerican Solar, Inc.
Association of Energy EngineersBaltimore Chapter
March 2002
![Page 2: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/2.jpg)
www.americansolar.com
What do solar energy systems offer?
• Energy savings• Cost savings• Reduced maintenance• Improved reliability• Improved operability• Improved environment for workforce
![Page 3: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/3.jpg)
www.americansolar.com
What types of solar energy systems are available?
• Solar Electric– Photovoltaics (Electricity from solar cells)
– Solar thermal electric (Focussed heat for steam turbine electricity)
• Active Thermal Systems pump air or water– Air heating up to 190 deg.F
– Mid temperature water heating 110-180deg.F
– Low temperature pool heating < 110 deg. F
• Passive Thermal Systems heat without fans or pumps
![Page 4: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/4.jpg)
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Where should solar electricsystems be deployed?
• Photovoltaics– Remote applications with complex fuel/electricity delivery– Small local applications with high cost power line installation– Security lighting, sensors, and radio/call boxes– Lighting for critical operations
• Solar Thermal Electric– High cost electricity with concurrent heating needs– Combined heating, absorption cooling, and power
applications – Energy Savings Performance Contracts for solar heat
![Page 5: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/5.jpg)
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Where should water heating systems be deployed?
• Mid temperature water heating– Displace high cost electric resistance domestic water
heating– Large volume water preheating for labs, medical, or
equipment washdown– Water tube radiant floor space heating
• Swimming pool heating– Almost all heated outdoor pools– Heated indoor pools without heat recovery from
dehumidification– Heated indoor pools with high cost electric dehumidification
![Page 6: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/6.jpg)
www.americansolar.com
Where should solar air heating systems be deployed?
• Low temperature air - less than 110 deg.F– Ventilation preheating in cold climates– High volume low temperature drying applications
• Mid temperature air 110 - 190 deg.F– Emergency generator standby heating all climates– Boiler air pre-heating all climates– Ventilation air heating and preheating– Heat pump pre-heating– Hot water heating with air to water heat exchanger– Air radiant floor and under floor ventilation
![Page 7: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/7.jpg)
www.americansolar.com
What makes a good solar application?
• Year round load, year round load, year round load– Make the system repay investment every day the sun shines
• Don’t try to make solar meet 100% of the peak energy needs for large systems– Use solar to cut “annual” costs of large energy systems
• Displace electric, propane, oil heat with solar heat • Avoid conversion from the original solar energy for
use or storage – no AC inverter, no batteries, no thermal storage tank, no grid
connection
![Page 8: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/8.jpg)
www.americansolar.com
What makes a good solar application?
• Low installed cost – under $25/sq ft
• High solar efficiency – 10 to 30 units of solar energy gathered for every unit of energy
used to run fans or pumps– greater than 20% of available solar energy converted to heat or
electricity
• Building integrated – makes building walls or roof do double duty (weather envelope
and energy production) for no extra cost
• Buy the energy not the system, if capital funds are not available but operating funds for energy bills are
![Page 9: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/9.jpg)
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Standby heating of emergency generators
• Electric heaters keep engine jacket water at 130 deg F all year
• 2-8 KW typical load • Solar heated air floods
generator enclosure, reduces electric heating
• Warm air keeps engine ready to start
• Payback period well under 10 years
• ‘Free’ storage building
New Federal Application
![Page 10: Www.americansolar.com Solar Energy Technology for Commercial Facilities John Archibald American Solar, Inc. Association of Energy Engineers Baltimore Chapter.](https://reader036.fdocuments.net/reader036/viewer/2022083004/56649d975503460f94a80b90/html5/thumbnails/10.jpg)
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Solar energy looks better and does more than ever before!
• New aesthetics with building integrated technologies– New solar roofs – New solar walls
• New solar applications– EDGs, boiler air, heat pump
preheat, ventilation air
• Lower installed costs• Higher energy delivery• Attractive economics