this post was submitted on 11 Sep 2023
22 points (100.0% liked)

Technology

37719 readers
114 users here now

A nice place to discuss rumors, happenings, innovations, and challenges in the technology sphere. We also welcome discussions on the intersections of technology and society. If it’s technological news or discussion of technology, it probably belongs here.

Remember the overriding ethos on Beehaw: Be(e) Nice. Each user you encounter here is a person, and should be treated with kindness (even if they’re wrong, or use a Linux distro you don’t like). Personal attacks will not be tolerated.

Subcommunities on Beehaw:

This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.

founded 2 years ago
MODERATORS
alyaza@beehaw.org
TheRtRevKaiser@beehaw.org
gyrfalcon@beehaw.org
rs5th@beehaw.org
coldredlight@beehaw.org
Los@beehaw.org
SemioticStandard@beehaw.org
TheRtRevKaiser@kbin.social
remington@beehaw.org
22
Would it be possible (at some point) cool aur by pulling heatenergy from it? (discuss.tchncs.de)
submitted 1 year ago by Haui@discuss.tchncs.de to c/technology@beehaw.org
37 comments fedilink hide all child comments
 

I recently had a discussion about ACs and how they heat up cities.

Then I found an article about theoretical increase of efficiency of acs by using the heat pulled from a room to run a thermoelectric device and getting some of the energy back that was used in the ac.

I‘ve had this downstream thought many times already: since hot air is basically just energy stored. Could we theoretically pull (all?) the energy from the air (depending on desired temp) to cool it and casually fuel our society’s energy needs?

you are viewing a single comment's thread
view the rest of the comments
[–] sanzky@beehaw.org 3 points 1 year ago* (last edited 1 year ago) (2 children)

some AC/ heat pump models pull the heat in the air and put it into water. those have existed for quite some time. look for “air to water heat pump”.

of course, there is some residual heat from the operation of the machine itself. and once the water is hot enough it will continue to release the heat into the air, but they do release way less heat into the air than regular AC units.

[–] fckgwrhqq2yxrkt@beehaw.org 2 points 1 year ago (2 children)

Could we run a water line through it from the water heater and use it as a supplemental water heater? At least we would be using that energy for something then.

[–] sanzky@beehaw.org 1 points 1 year ago

they already sell appliances that do that. Daikin Altherma line, for example, can combine A/C, sanitary hot water and home heating.

In summer it takes heat from the inside of your house an puts it in the water tank. In winter, it takes heat from the air in the atmosphere and puts it both inside your home and water tank.

[–] avidamoeba@lemmy.ca 1 points 1 year ago* (last edited 1 year ago)

So we can attach a steam turbine that's driven by the water loop and connect that to the grid. Then we can keep pumping heat into the water loop. Right? 😂