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9. What do the TEG parameters mean?

Thermal resistance of a TEG represents the degree to which a temperature drop will occur across the device when heat flows through it.

When designing a thermal TEG system, this thermal resistance will often be used to select a TEG that thermally “matches” the heat sinks used in the application. VOC, or open circuit voltage, is the maximum voltage the TEG will ever produce.It is important to remember that the TEG voltage during operation will be considerably lower than this value; usually around ½ of VOC.

Efficiency is the ratio of electrical power produced by the TEG to the heat that flows through the TEG.