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>The heat pump itself is >100% efficient Are you sure you aren't confusing the coefficient of performance with the efficiency? If a heat pump was >100% efficie
by bumby 5y ago
>The heat pump itself is >100% efficient
Are you sure you aren't confusing the coefficient of performance with the efficiency? If a heat pump was >100% efficient, I could cool my house by leaving my refrigerator door open.
- hnuser123456 5y agoIf you pipe the heat from the compressor directly outside instead of venting it into the same room, that would work.
- bumby 5y agoCorrect, that's what refrigerated air conditioners do. But that's really just playing a trick with the system boundary in the problem; it doesn't mean the global efficiency has exceeded 100%.
- cormacrelf 5y agoYes, it's an imprecise term.
- bumby 5y agoTo be clear, I don't think the term is imprecise. Efficiency is always (work out)/(work in). The numbers get wonky when we aren't fully accounting for the "work in". In the case of refrigeration, we have to account for the work it takes to compress the fluid and the resulting waste heat.