ST Alpha - "STIS is it easier to cool humid air or dry air? or is it the same? -- nm" (Reading a Post)

SlickerTalk
Search Archives
The Leaderboard
The FAQ

Login
Create Account

Search Dr. S. Talk
TT/ST Wiki
How Well Do You Know ...

RSS Feed

Hosting by DigitalOcean

Support ST on Ko-Fi

Down to Post

Backboards:

Posts: 153

STIS is it easier to cool humid air or dry air? or is it the same? -- nm

Posted by Pippy (aka Epiphany) Jul 2 '12, 14:41

(No message)

Responses:

get central ai rconditioning -- nm - peglegpete Jul 2, 15:22 1
- we got it, we also got a portable a/c unit this weekend for the side of the house that faces the Sun. -- nm - Pippy Jul 2, 15:32
We need Troy Barnes! -- nm - Guigue Jul 2, 15:07
well, air conditioning generally works either by vapour compression or evaporation, so I'm guessing that having water on hand makes cooling air easier - mafic Jul 2, 15:01 6
- but it also takes quite a lot of energy to change the temperature of water, so if you have a cooling system on hand, dry air would be easier to cool, - mafic Jul 2, 15:08 4
  - isnt an evaporator cooler used in dry, not humid, areas? -- nm - tRuMaN Jul 2, 15:23 1
    - Yup. But that takes advantage of the energy lost by the hot, dry air to evaporate the water with the end result being cooler more humid air - JD Jul 2, 15:30
  - short answer: humid air: difficult to cool, stays cool longer, dry air: easy to cool, heats up quicker. -- nm - mafic Jul 2, 15:10 1
    - wow, did not know this. -- nm - loosilu Jul 2, 15:33
- But the compression cycle is a closed loop of another stuff that runs independent of the air to be cooled -- nm - JD Jul 2, 15:06
I would think it might be easier for humid, since it's less dense than dry; but there may be something else in the mix. (nub.? reagen? bueller?) -- nm - b. Jul 2, 14:48 4
- This. Sort of. If you were to reverse it. The higher the humidity, the more dense. More humidity = more water vapor so there's more stuff in the air - JD Jul 2, 15:04 3
  - butbutbut I actually googled to make sure I had them the correct way! - b. Jul 2, 15:08 2
    - Ummm. Stupid intuition. H2O mol weight = 18 vs N2 mol weight = 28. H2O vapor displace N2 so indeed lighter for given volume. - JD Jul 2, 15:34
    - here's the link for that. nm but: -- (link) - b. Jul 2, 15:09
Hi Pippy:) -- nm - eag Jul 2, 14:46 2
- Hi! - Pippy Jul 2, 14:47 1
  - It will on both counts -- nm - eag Jul 2, 14:50
I don't know, but my coin flip says dry. -- nm - loosilu Jul 2, 14:42

Post a message top

Replies are disabled on threads older than 7 days.