Comment by pyinstallwoes

Thermoelectric generator. Take the differential and output a voltage?

Why hasn't this been done? Why do we go to the steam stage when we could just exploit the termoelectric properties of temperature and current?

1. Thermoelectric generator: https://en.wikipedia.org/wiki/Thermoelectric_generator

2. Thermocouple https://en.wikipedia.org/wiki/Thermocouple

3. https://en.wikipedia.org/wiki/Thermoelectric_effect