this post was submitted on 05 Jul 2023
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DMT Dank Microwave Taco

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cross-posted from: https://exploding-heads.com/post/176493

cross-posted from: https://exploding-heads.com/post/176492

https://mistcooling.com/cool-energy-ac-mister.html

https://www.kickstarter.com/projects/19381/mistbox-energy-saving-device-proven-to-cut-ac-bill

Review of Mistbox with commentary: https://www.allhomerobotics.com/mistbox-review/

I guess the idea is to use evaporative cooling to keep HVAC units cool when it's hot?

Do these kinds of things work or is there a way to make them work?

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[–] Scruffy_Nerfherder@exploding-heads.com 2 points 2 years ago (1 children)

I have always wondered about that.

[–] squashkin@exploding-heads.com 2 points 2 years ago* (last edited 2 years ago) (1 children)

I began this thought today as I thought I stumbled upon a figure that A/C in cars can use about 10% of the gas in the tank

I couldn't find a figure for that but did find this:

“Air conditioning of a car consumes between 0.2 and 1 litre of petrol at 100 km.”

https://www.endesa.com/en/blogs/endesa-s-blog/air-conditioning/heating-air-conditioning-car

100 km to miles is 62 miles, so .2-1 liter / 62 miles. a liter to gallon is about 1/4 gallon. so .25 gallon / 62 miles on high end. If a car is 30 mpg let's say, that's 12.5% of fuel per gallon on the high end. .2 liter is a 1/5 of that, so a fifth of 12.5% I'll put at 2%. So that site sounds about similar, between 2%-10% (probably depends on how hot it is).

I've also been interested in this in the case of energy blackouts where people don't have access to electricity or as much

edit: another source says

For example, in a recent study from Consumer Reports, they found that running the AC will cost you between one and four miles per gallon of gasoline.

https://www.ridester.com/does-ac-use-gas/

4 miles of 40 mpg is 1/10 or 10% on the high end (more or less depending on how hot and how good of fuel efficiency you have)

I don't know how you could apply that to cars. It could work very well for buildings. In very dry climates I could see it being very effective.