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The cycle in the figure has been explained during the lectures. It shows the route to convert the hydrogen produced by water splitting into natural gas.The following efficiencies are considered:Based on the above given conversion efficiencies, calculate the efficiency of the complete process in %: ______
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The world electricity consumption is roughly \(20300 TWh\) per year. We want to cover the total electricity demand of the world by installing solar thermal power in the Sahara desert, where the average solar insolation is: \(6.3 kWh/m^2day\). Assuming that the overall effciency of a solar thermal power plant is 20%, how much area in \( km^2\) will be needed to cover the world electricity demand?If the area of the Sahara desert is \(9,400,000 km^2\), how much percentage of the Sahara desert area would that cover? ______
The world electricity consumption is roughly \(20300 TWh\) per year. We want to cover the total electricity demand of the world by installing solar thermal power in the Sahara desert, where the average solar insolation is: \(6.3 kWh/m^2day\). Assuming that the overall effciency of a solar thermal power plant is 20%, how much area in \( km^2\) will be needed to cover the world electricity demand? ______
Solar simulators are used to study the performance of solar cells in the lab. In the figure below (left picture), the spectral power density of a solar simulator is shown with the blue line. The spectral power density of this solar simulator is given by: \(P(\lambda) = 7.5*10^{15} \lambda - 2.25*10^9~[Wm^{-2}m^{-1}]\) for \(300 nm \lt \lambda \lt 500 nm\) \(P(\lambda) = 2.25*10^9 - 1.5*10^{15} \lambda~[Wm^{-2}m^{-1}]\) for \(500 nm \lt \lambda \lt 1500 nm\) Where the wavelength \( \lambda\) is expressed in meters. Calculate the irradiation \( I\) of the solar simulator (in \(Wm^{-2}\) ) ______
On the left-hand side of the figure below a III-V triple junction solar cell is shown. On the right-hand side, the J-V curves of the individual component cells and the multi-junction solar cell are shown.Which junction corresponds to sub cell 3?
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