# Tag Info

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The U.S. National Renewable Energy Lab did a study of solar installations in the U.S. in 2013 and determined that for large-scale solar PV systems, 7.9 acres (31,970 $m^2$) of land are required on average for 1 $MW_{ac}$ of power capacity (from Table ES-1). This is based on analysis of 72% of existing installations in the country, so this is a good real-...

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This was my senior team project in engineering school, in 1974. Here were our findings: The power needed to run a small absorption refrigerator can be supplied by a solar collector of about 32 square feet, but the temperature required to boil the ammonia out of the water requires a concentrating collector (not a flat plate)- and hence requires an aiming ...

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It is a lot more efficient to convert the solar to electricity and run a decent heat pump for AC and normal refrigeration. Absorption refrigeration is expensive, bulky, not terribly versatile, and has poor thermal efficiency. The Coefficient of Performance of a large single stage absorption chiller is about 0.7. The conversion efficiency of solar electric vs ...

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the monocrystalline cells are thinly sliced off cylindrically-grown single crystals that look like logs. Each wafer thus produced is hence a circular disc. To make the resulting solar cell function properly, its active area must be square so the rounded edges of the wafer get sawn off so the wafers can be packed together as closely as possible during bulk ...

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Solar heating systems have been designed with many different fluids depending on the ambient temperatures and max desired temperature. The ambient temperature is because the night-time temperature or even no sun temperature will affect the performance of the fluid. Some systems are designed to be above the boiling point of water so the system pressure is ...

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There are many ways to use the solar energy and depending on the scale they could use water in small home rooftop collectors to combination of sodium and molten salts in big solar towers. See this link. Quote from Wikipedia: Early designs used these focused rays to heat water, and used the resulting steam to power a turbine. Newer designs using liquid ...

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Been done with a polycarbonate type sheet. Actually I bought a solar collector with this type of cover. The sheet was formed with “pillow” type bulges to prevent sagging. About 5mm thick and strong enough to withstand hail etc as well as the high temperature from a panel heated when it has no water in it. Btw, don’t need the ordinary glass that is just a ...

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Yes, the actual light sensor in any CCD or CMOS imaging device is an ordinary silicon photodiode. However, there's just one silicon crystal (wafer), not an "array of silica crystals". Silica is silicon dioxide, which is an insulator, not a semiconductor. The difference is that in a solar cell, you make one big diode that covers the entire chip/...

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That is indeed the essence of it. CCD's either generate tiny charges upon being hit with light, or otherwise alter the accumulation of charges by the effects of light hitting them. They are made so small, so numerous, and so closely packed together that they can be used to reconstruct a fine-grained light image of an object by reading those charges off them ...

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I believe what this sentence is trying to convey is that all circuit components have a small resistance associated with them if you look at them in enough detail. For example a transformer circuit can be viewed as (this is from electrical academia website: The reason that the resistance is there is because there are wires in the system (unless of course you ...

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Diode Like you assumed Panels: These are the PV panenls that produce current. They produce DC current I and DC voltage V Inverter: the inverter converts the DC current and Voltage from the panels to AC voltage and current, which is in sync with the Grid. This part is responsible for converting the energy from the panels into the energy that the grid can ...

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