What are the assumptions needed to produce solar energy?
Question:
Answer:
actually you don't have to assume anything and solar energy is still there.
try physics category?
1. You have a solar cell in your hand
2. The sun is shining
the sun has to shine
Energy from the sun can be used for many practical purposes, including generating electricity and heating water. In fact, using solar energy instead of fossil fuels to meet some of our energy needs reduces emissions of greenhouse gases and other pollutants. These emission savings depend upon many factors, including where you live, the type of solar technology used, and the amount of energy provided by these technologies. You can estimate the emissions benefits of using photovoltaics, solar water heaters and solar heated swimming pools.
When solar energy displaces other energy sources with higher emissions levels, it produces a benefit in the form of reduced emissions of pollutants. Take the case of a solar water heater displacing an electric water heater. In producing the electricity needed to operate an electric water heater, SO2, NOX, and CO2 are emitted.
However, since solar heating creates no emissions,replacing an electric water heater with a solar water heater reduces emissions by the amount that would have been generated in providing power to the electric water heater.
The Solar Power Calculator estimates SO2 and NOX emission reduction benefits using information from the Emissions and Generation Resource Integrated Database (E-GRID), which provides data on actual emissions associated with electric power generated by US utilities. Carbon dioxide emission reductions are based on a model that simulates marginal reductions in electricity use. In the calculator, emission factors (expressed in terms of pounds of pollutant per kWh of electricity) are multiplied by reduced electricity use.
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