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> Peltier systems require more energy input than comparable compressor-based systems. However, while heat is emitted from Peltier systems, it is comparatively l
by derkades 4y ago
> Peltier systems require more energy input than comparable compressor-based systems. However, while heat is emitted from Peltier systems, it is comparatively less than in compressor-based systems.
How is it possible to use more energy, but produce less heat? Are they comparing a tiny peltier cooling box to a full sized refrigerator?
EDIT: I guess you could argue it produces less heat if it moves less heat from inside the refrigerator, but that's not really an upside
- StingyJelly 4y agoYea, that was weirdly worded sentence. Peltier cooling can probably be more efficient (not clear) when there's low temperature difference so if one wants slightly colder drinks than the room temperature there's an advantage. E: As someone here mentioned, wine fridge seems to be that perfect application.
- londons_explore 4y agoEven with a low temperature difference, gas compressors still win. I'm not aware of any point in the input/output temperature chart where peltier wins on efficiency.
- toast0 4y agoIt's hard to separate the heat generated by the equipment from the heat transferred from the conditioned space to the unconditioned space when talking about the heat produced. So I'm guessing, they're effectively saying the peltier system uses more energy while transferring less heat. It makes sense for some applications where noise and vibration are important or required capacity is low or compressors are otherwise unsuitable, but compression based refrigeration is usually the default.
- samatman 4y agoSomeone wanted to add an "on the bright side!" to a sentence which wanted to be "Peltier coolers are less efficient, and also less powerful: they will burn more electricity while moving less heat".