Nit: Stirling cryocoolers, not Stirling engines. Thermodynamically, it's just reversed. You're driving mechanical/electrical power in to get a thermal differe

Nit: Stirling cryocoolers, not Stirling engines. Thermodynamically, it's just reversed. You're driving mechanical/electrical power in to get a thermal difference, not dissipating a thermal difference to get mechanical work/electrical power out.