What are the optimal dimensions of box solar cookers?

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Jignesh Rajnikant Mehta

It would depend upon the capacity needed. There could be some standardized dimensions and designs in literature like the box type solar cooker with four pots for a three-four member family.

Sachin Muralee Krishna

The following article may be helpful to you.

http://www.sciencedirect.com/science/article/pii/S0038092X15004612

Hamit Can

https://www.solarcookers.org/files/1314/2427/8672/THERMAL_TEST_PROCEDURE_FOR_BOX-TYPE_SOLAR_cookers.pdf