Patent ID: 8581090

Claim:
Apparatus comprising: a compact power supply further comprising: a housing, a combustion air fan connected to the housing, a combustion air inlet connected to the combustion air fan, a mixing tube connected to the combustion air inlet, a fuel supply tube connected to the mixing tube in the housing, a combustion chamber connected to the mixing tube in the housing, an infrared emitter assembly surrounding the combustion chamber, an exhaust chamber surrounding the infrared emitter assembly, an outer infrared transmitting tube surrounding the exhaust chamber, thermophotovoltaic cells surrounding the outer infrared transmitting tube, an Omega-shaped recuperator connected to the exhaust chamber, a cooling chamber surrounding the thermophotovoltaic cells and the recuperator, a cooling air fan blowing cooling air through the cooling chamber, across the thermophotovoltaic cells, and through the recuperator, an exhaust outlet connected to the recuperator and the cooling chamber, combined cooling air and exhaust outlets connected to the cooling chamber and the housing, wherein the infrared emitter assembly comprises an annular array of adjacent infrared emitter posts, wherein the infrared emitter posts are separated by narrow slits, and wherein the infrared emitter posts are tilted outwardly and the slits are wider in a first direction toward the cooling air fan and the slits are narrower in a second direction toward the combustion air fan.