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A comment on Launch HN: Electric Air (YC W23) – Heat pump sold directly to homeowners.

Re:Launch HN: Electric Air (YC W23) – Heat pump sold directl... by londons_explore on Monday March 13, 2023 @02:00PM (#35139744)
Have you considered doing double-vapor injection?

Ie. have a 2nd injection port on the compressor, and another valve and heat exchanger after the first?

Software could then decide to use none, one, or two, depending on the desired heat output vs efficiency.

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Re:Launch HN: Electric Air (YC W23) – Heat pump sold directl... by cmui on Monday March 13, 2023 @09:34PM (#35146129)
Haven't looked at that. Dictating compressor design requires some massive scale as a business, or taking on the design and manufacture yourself, which I wouldn't recommend to startups. Also, I suspect that increased vapor injection ports has diminishing returns (but I haven't done the calcs on it).
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