Honeywell has developed a new air conditioning system for urban air mobility (UAM) and electric aircraft. The first to be equipped with the new oil-free Micro Vapor Cycle System (MicroVCS) will be Eviation’s in-development Alice conventional takeoff and landing electric commuter airplane.
MicroVCS saves on weight by eliminating oil used for lubrication, which Honeywell said will also reduce maintenance costs. The vapor-cycle system’s refrigerant is Honeywell’s Solstice R1233zd, a low-pressure, non-flammable, “environmentally-conscious” hydrofluoroolefin. Cooling capacity is about 1,130 BTU/min (20 kW) at typical hot-day ground conditions, according to Honeywell. System weight, including a structural frame, is about 140 pounds for an aircraft of Alice’s size.
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