How to model the radiative cooling of solar cells in COMSOL?

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I am working within the heat transfer module in COMSOL 5.4. I need to determine the temperature variation in the vertical direction within a silicon solar cell, which has a radiative cooler (RC) placed on top of the cell. What this means is that: 1. RC fully transmits light in the PV band (0.3-1.1 um) so that the cell receives all light and can generate electricity. 2. RC reflects light in the Vain band (1.1-4 um) so that the cell does not receive low bandgap energy which heats up the cell. 3. RC emits thermal radiation in the atmospheric band (4-25 um) so that all excess heat from the cell gets radiated to the outer space and the cell cools. I am using the heat transfer with the surface to surface radiation multiphysics node. The sun has been modeled using external radiation source. I'm a bit confused about the boundary conditions that need to be set. I need to set a value for the transmittance of the RC but I can't do that since the option is not available in COMSOL if I use external radiation source as the sun. Also, how can I set the transmittance of the sky so that heat can be radiated out into space? Any help will be appreciated. Thanks.

0 Replies Last Post 5 Apr 2020, 00:44 GMT-4
COMSOL Moderator

Hello Salman Ahmed

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