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## Conversion of ZT of a Thermoelectric to Refrigeration COP

The tool uses the following formula for the ZT to COP (refrigeration) conversion:

$COP_R = \left( \frac{T_c}{T_h - T_c} \right)\left( \frac{\sqrt{1 + ZT_m} - T_h/T_c}{\sqrt{1 + ZT_m} + 1} \right)$

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