Vignesh Viky
Vignesh Viky
Electronic
29 Nov 2017

Can we separate light and heat from solar rays?

The efficiency of solar power output depends upon the temperature, right? So, if we can separate the heat from solar rays we could produce improved efficiency by allowing only light to fall on the panel. Is there a filter or any methods to do that?
29 Nov 2017
Cold mirrors actually separate large portion of heat from light. I believe you'd just be looking at offsetting the IR part of the spectrum; which mostly is heat.
Vignesh Viky

Vignesh Viky

Electronic
03 Dec 2017
Thank you, Sir. By offsetting IR rays, does the intensity of light reduce? Does it reduce the solar power output? Also, can we use a thermoelectric generator to generate additional small power from the IR rays?
06 Dec 2017
Look at it this way: The total energy reaching the panel with the sun directly above the panel is a mixture of x% heat and (100 - x)% light. Even assuming a perfect heat blocking filter, still the light energy reaching the panel is (100 - x)% whether the filter is there or not.

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