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Joined 11 months ago
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Cake day: August 11th, 2023

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  • There are currently no production heat pumps using the electrocaloric effect to my knowledge. Stirling engine I doubt as well. Either way still classes as refrigeration. In fact a Stirling engine heat pump/refrigerator would still need refrigerant as it needs a working fluid.

    Edit: also pretty sure a Stirling engine is an implementation of a carnot engine









  • You’re missing something though: phone cell or battery capacity has been getting bigger, not smaller. The issue isn’t the batteries, it’s the other hardware and software needing more and more energy. Modern phones are much faster, have better screens at higher resolution, brightness, even refresh rate. All of this uses energy, even with modern technology being as awesome as it is. Qualcomm, TSMC, ARM, and Apple put quite a bit of work into making these things as efficient as they can be, but we keep demanding more and more from these devices. For many they replaced laptops after all.

    It’s a bit like complaining that your new ultra high performance sports car is getting bad range, and complaining about the fuel tank or battery instead of the engine. The tank has only gotten bigger or at least stayed the same, but the engine has gotten hungrier and hungrier with each generation.



  • areyouevenreal@lemm.eetoMicroblog Memes@lemmy.worldWait, not like that
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    3 days ago

    Actually that’s wrong. When we build food refrigerators using peltier modules, it’s still a refrigerator. The reverse carnot cycle is just one type of refrigeration cycle, reverse rankine and reverse brayton cycles still count.

    Sure you could call them all heat pumps, and you might be technically right. Nobody actually calls them that though. Most people probably haven’t figured out that an AC unit, a heat pump, and a food refrigerator are all actually the same concept in different dressing and sizes.

    It’s only an irrelevant topic if you can actually communicate clearly, which is actually very hard as almost no one understands this stuff. Especially in the UK where this is all viewed as newfangled, expensive, and unreliable technology. To be fair they aren’t wrong in this country: the way we handle, specify, and install ASHPs makes them feel and act inferior to a good old condensing gas boiler. It’s a sad state of affairs.