[Unklejoe]

Does the same go for Peltier plates and thermocouples?

[jbay808]

Yes, thermocouples can work as heat pumps, and Peltier elements can work as thermocouples.

[iancmceachern]

There are actually flow meters that make use of this. They heat the thermocouple using itself, then switch back to using it as a thermocouple and measure the rate of heat dissipation and correlate that to flow rate.