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18 Cards in this Set
- Front
- Back
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charge controller |
Electronic device that regulates the amount of current going to the batteries in a battery stack to prevent overcharging |
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A type of solar water heating system that uses a pump to circulate the heat transfer fluid |
Active |
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The type of solar collector composed of double glass tubes |
Evacuated tube collectors |
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the intensity of solar radiation striking the Earth surface is increased when it passes through a thick layer of atmosphere and when it strikes at an angle rather than vertically |
False |
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Low ceilings and heating cooling zones that are separated from one another by close to ours are most efficient for heating a home in a cold climate |
true |
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Residential solar water heating installation must be passive |
False |
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Silicon is the most popular semiconductor material for solar cells |
True |
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PB models range in output from 10 to / 300 watts |
True |
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Solar radiation that reaches the surface without being diffused is called direct beam solar radiation |
True |
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Of all the energy we use in our daily lives only wind energy is not a form of sun energy |
False |
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If sunlight cannot be kept off some parts of the building make sure those surfaces are reflective as possible so that the least amount of heat is absorbed |
true |
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Passive residential solar water heating systems rely on municipal water pressure and motor pump to circulate the HTF |
False |
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Generating electricity directly from the sun's radiation is known as photovoltaic power generation |
True |
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Passive use of solar energy consists of using the sun rays to provide heat when it is beneficial to the homes environment and conversely preventing the sun's Rays from adding heat to the home's environment when it is not wanted. Positive methods of utilizing or blocking the sun's Rays involve the placement of Windows door openings awnings Shades trees and plants and usually izing insulation |
True |
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BHP teas to transfer heat to the working fluid. He hpt's are composed of double glass tubes one within the other with the space between the tubes evacuated to reduce heat transfer. The inner tube of each efpt contains in absorber plate fuse to a heat pipe. The heat from the hot end of the heat pipes is transferred to the working fluid and a heat exchanger called a manifold. The manifold is insulated and then case and Sheet Metal or plastic to protect it from the elements |
True |
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when semiconductor material absorbs sunlight the solar energy knocks electrons loose from the atoms to make up the material. This phenomenon is called the photoelectric effect. These free electrons flow into a circuit build into the solar cell from an electric current. Only some light from a certain wavelength work sufficiently to create electricity through the photoelectric effect. For this reason PV systems can still produce electricity on cloudy days but not as much as on sunny days |
True |
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Polycrystalline solar cells are made of layers of semiconductor materials only a few micrometers thick. Polycrystalline solar cell technology has made it possible for solar cells to be combined in various non-crystalline materials to form dual-function building components including rooftop or solar shingles, roof tiles, building facades, and glazing for skylights or a tree up. These materials form a part of a home structure and are capable of electric power generation. In addition to the dual function they are attractive and durable but also present a lower in photovoltaic efficiency and more expensive than in an equal capacity or small solar Electric System |
False |
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Most home owners prefer a grid-connected system to a standalone system because the grid system allows the solar panels to generate some or all of the home's electricity when sunlight is adequate to do so but also permits electricity to be fed into the homes from the municipal electric grid whenever solar power alone is not sufficient to meet current needs. Any excess electricity produced by the solar system is fed back into the grid |
True |
