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49 Cards in this Set
- Front
- Back
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What's the best use for solar air systems? |
Daytime space heating |
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Second best use for solar air systems? |
Domestic hot water |
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What's the cost of solar air systems? |
Least expensive. A panel os around $1500.00. |
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What size are collectors for solar air systems? |
4 x 8 for 400 ft2 |
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Where do you mount solar air collectors? |
Ground mount is preferred. |
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What is roof mounting good for with solar air systems? |
It's good for air distribution when there is attic ducting. |
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What size duct is used for solar air systems? |
6 inch. But when there are 2 combined use 8 inch. |
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What type of energy is a solar air system? |
Active |
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What's the best use for solar hot water systems? |
Domestic hot water |
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What's the second best use for solar hot water systems? |
Storage and space heating |
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What's the cost of solar hot water systems? |
Low to moderate |
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How many and what size collectors are recommended for solar hot water systems? |
Minimum of 2 collectors that are 4 x 8 with 60 - 80 gallon tank for closed loop or drainback system. For storage and space heating you need a minimum of 4 collectors. |
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Where are solar hot water systems mounted? |
On the roof |
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What kind of energy is a solar hot water system? |
Active |
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What is the best use for solar electric systems? |
Lighting, electronics, remote applications, grid-tie |
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What is the second best use for solar electric systems? |
Stand alone |
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What is a solar electric system recommended for |
Running solar components like a controller, blower or pump for stand alone systems. Remote lighting and water pumping where getting to a site is cost prohibitive. Agricultural uses like irrigation, dryers, shops |
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What kind of energy is a solar electric system? |
Active |
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What's the Nebraska net metering? |
25 kW |
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How is a solar electric system ideally used for non-grid connected homes or buildings? |
In combination with other power or heating sources. |
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What is a controller? |
The component that automatically turns on the blower or pump when the heat in the collector is greater than the temperature inside the house or water tank. |
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Where are the sensors located for the controller? |
Outside on the collector and inside the house. |
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What does a blower do? |
Pushes air through the insulated, flexible duct work to the solar air collector and back into the house. |
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What kind of blower is the best? |
Wheel or squirrel cage type. |
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What does the pump do? |
Pushes water though the pipes to the solar water collector and back into the water heater or storage tank. |
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What are the two types of solar energy systems? |
Thermal or electric. |
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What's a solar thermal collector made of? |
Aluminum, hardened solar glass and rigid insulation. They are 4 x 8 and weigh 80-100 pounds. |
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What are the two types of solar thermal collectors? |
Air or liquid. |
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What's inside an air collector? |
Nothing. It's hollow? |
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What's inside a solar electric collector? |
Silicon wafers with very tiny wires that collect electricity. |
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How are solar electric collectors sized? |
By watts. They range from 25-125 watts. |
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What sizes are typical for solar electric collectors? |
Smaller ones are about 2 feet. Bigger ones are about 3x5 feet. They weigh 5-30 pounds. |
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What does solar storage refer to? |
Hot water systems where heat from a collector is transferred to an insulated water tank for storage |
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What type of solar system uses a heat exchanger? |
Hot water systems |
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What's water-to-water heat exchange? |
A heat exchanger has heated water from the solar and it passes by cooler water from the tank and they exchange energy. |
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What's water-to-air heat exchange? |
A heat exchanger has heated water from the tank and it passes through a coil with air blowing over it. |
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What is radiant floor heating? |
Tubing is placed in a concrete floor and water running through it is heated by solar. |
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Why is radiant flooring a good type of heating? |
It's even, steady and eliminates drafts. The floor both distributes and stores heat. |
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Define "solar system" |
The components necessary to collect energy from the sun and transfer that energy to another media or area. |
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What are the components of a solar air system? |
A controller, collector, blower and duct work. |
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What are the components of a solar hot water system? |
A controller, collector, pump, heat exchanger and pipes |
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What are the components of a solar electric system? |
Controller, collector, battery charger, and batteries. Can also have an inverter that flips solar from DC to household AC. |
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What is insolation? |
The rate of delivery of solar radiation per unit of horizontal surface. |
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What is Nebraska's insolation? |
3.5 to 4. Ranks 8th best nationally. |
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When do most solar units pay for them selves? |
5-10 years |
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Where are good places to install solar hot water systems? |
Home, office, shop, green houses, driveways |
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Where are good places to install solar electric? |
Home, office, shop, remote fields. |
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Where is solar electric installed? |
Ground, side of wall or roof. |
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The blower comes on when |
The circuit closes |
