it has not been practical to enhance the performance of silicon photovoltaic cells by using lenses with high concentration ratios because.a) the extreme magnification makes the sun's image too large to match the surface of the solar cell.b) the Carnot efficiency cannot exceed the maximumc) the solar cell efficiency is reduced at the resulting high temperaturesd) the lenses are more expensive per square centimeter than are the silicon solar cellsExplain.
The best answer is: c) the solar cell efficiency is reduced at the resulting high temperatures Most concentrating pv systems require coolingPassive Cooling: Here, the cell is placed on a cladded cermaic substrate with high thermal conductivityThe ceramic also provides electrical isolationActive Cooling: Typically, liquid metal is used as a cooling fluid, capable of cooling from 1,700°C to 100°C(Quoted from source)
put a cover on the ones that you don,t use
