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Originally Posted by cRiPpLe_rOoStEr
Makes me wonder how an aviation-inspired air-cycling setup, instead of the more usual vapor-cycling air conditioner, could lead to further improvements to the aerodynamics. Or if that wouldn't be doable at all... AFAIK the only road-going vehicles featuring some sort of air-cycling conditioner are some coaches, due to Covid-related regulations which prompted coachbuilders to resort to this in order to decrease the risk of contamination, yet I'm not sure how effective it is.
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I'm given to understand that, they use air as the working fluid because there's available surplus power from the compressor section of the jet-turbines, and if the system were to somehow spring a leak, only 'air' would contaminate the passenger cabin and cockpit.
Some refrigerants are both flammable, explosive, and toxic, especially in confined spaces, like an aircraft.
