where Tc = cold side temperature (in Kelvin)
Th = hot side temperature (in Kelvin)
Tm = 1/2 * (Th + Tc) (in Kelvin)
Z = figure of merit of both n and p type thermoelectric material.
Rama Venkatasubramanian has developed a p type material with a figure of merit of 2.4 (current values are ~1.0) and an n-type material with a figure of merit of ~1.4. I'm not sure what overall figure of merit this will give but it will be better than the current value of ~ 1.0 and hence this material can be used to make a more efficient peltier heat pump.
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The max co-efficient of performance of a thermoelectric heat pump can be calculated using the formula:
COP (max) = Tc((1+ZTm)^1/2 - (Th/Tc)) / (Th - Tc)*((1+ZTm)^1/2 +1)
where Tc = cold side temperature (in Kelvin)
Th = hot side temperature (in Kelvin)
Tm = 1/2 * (Th + Tc) (in Kelvin)
Z = figure of merit of both n and p type thermoelectric material.
Rama Venkatasubramanian has developed a p type material with a figure of merit of 2.4 (current values are ~1.0) and an n-type material with a figure of merit of ~1.4. I'm not sure what overall figure of merit this will give but it will be better than the current value of ~ 1.0 and hence this material can be used to make a more efficient peltier heat pump.
Hope this info is of use.