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Comment on Your future air conditioner might act like a battery

DrunkenPirate@feddit.org ⁨1⁩ ⁨month⁩ ago

Call me naive but I thought that one needs cooling when its hot and the sun burns outside. At that time there‘s plenty of PV energy available. No need for storage, just take it directly.

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beeng@discuss.tchncs.de ⁨1⁩ ⁨month⁩ ago
Brick and concrete holds heat for hours.

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- DrunkenPirate@feddit.org ⁨1⁩ ⁨month⁩ ago
  Oh, that‘s it. I remember my good old tile stove.
  
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evasive_chimpanzee@lemmy.world ⁨1⁩ ⁨month⁩ ago
In plenty of places, the wet bulb temperature is high 24 hours a day. At night, the temperature goes down, but relative humidity goes up, so you feel cooler, but also worse. You still need AC during that time, but mainly to dehumidify.

Also, in many places, peak demand is actually in the early evenings because people let their houses get hot while they are at work, but turn the AC on when they get home.

Any way you can store energy for even a few hours is really nice, and these kind of solutions could help adjust the daily demand curve to meet the supply curve.

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activistPnk@slrpnk.net ⁨1⁩ ⁨month⁩ ago
Consider this excerpt:

When the grid is extremely stressed, utility companies are sometimes forced to shut off electricity supply to some areas, leaving people there without power when they need it most. Technologies that can adjust to meet the grid’s needs could help reduce reliance on these rolling blackouts.

So grid-powered a/c can give the grid relief at peak times with this tech.

But indeed this tech on a PV-powered compressor seems sketchy. There are probably moments when the sun is hitting hard but the temp has not climbed up yet (sunrise) in which case it would be useful to store the energy. But I’m struggling to understand how the complexity of the system would be justified considering the overall efficiency is reduced as well.

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- DrunkenPirate@feddit.org ⁨1⁩ ⁨month⁩ ago
  If you have a PV upon your house, the most effective power storage option will be a general power storage, not storing power within the aircon. Doing so, it‘s just accessible by one single device. Instead of all electric devices in the house.
  
  I assume this aircon is targeting apartments in a residential block. But even here, I assume it makes more sense to run a small battery storage such as a camping storage for your apartment and offer power for all your devices, not just a single one.
  
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  - activistPnk@slrpnk.net ⁨1⁩ ⁨month⁩ ago
    Well that depends on how equipped you are. One cool thing about compressors is you can straight up connect a PV directly to a compressor with no voltage regulators or anything. So if you have a simple setup like that, I can see cost effectiveness in storing ice. But if you already have batteries, and thus voltage regulators and all the intermediate components to make that possible, then I would agree… I might rather store it in lead acid batteries as that would be more versatile.
    
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