Evolving from a company established to produce MEMS-based energy harvesters, Micropelt incorporated its tiny thermogenerators into a self-powered iTRV thermostatic radiator valve actuator. Using the temperature difference between the radiator and the ambient room temperature to provide electrical energy, other circuitry provides power management including energy storage to drive an actuator as well as provide wireless communication with the thermostat. The thermogenerator starts to produce usable power at temperature differences from as little as 4 K, and eliminates the need for batteries or wiring. With its MEMS technology more than 100 leg pairs of thermogenerators are possible on a square millimeter.
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