this post was submitted on 03 Sep 2023
794 points (93.5% liked)
memes
9838 readers
3727 users here now
Community rules
1. Be civil
No trolling, bigotry or other insulting / annoying behaviour
2. No politics
This is non-politics community. For political memes please go to [email protected]
3. No recent reposts
Check for reposts when posting a meme, you can only repost after 1 month
4. No bots
No bots without the express approval of the mods or the admins
5. No Spam/Ads
No advertisements or spam. This is an instance rule and the only way to live.
Sister communities
- [email protected] : Star Trek memes, chat and shitposts
- [email protected] : Lemmy Shitposts, anything and everything goes.
- [email protected] : Linux themed memes
- [email protected] : for those who love comic stories.
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
It's another one of those weird non-metric units. In the world of air conditioning (or cooling in general), a "ton" is the amount of cooling you'd get from melting a ton (a short ton - that is 2000 pounds) of ice that's already near its melting point. Air conditioners are usually rated in tons per day, with 1-5 tons about right for a typical apartment or house, depending on things like square footage and climate.
I'm the kind of person to argue the merits of the imperial system, and even I think that's bonkers.
What do you think the metric system is based on? It's the exact same thing.
0c is the temperature of water freezing (at sea level, etc.etc.)
100c is the temperature that water boils.
1 kilocalorie is the energy needed to raise the temperature of 1kg of water one degree.
You have to define energy in some way, and almost all of it is related to how it affects water.
Fingers.
Calories are not metric. And there are even two calories. Not as bad as 10 different inches, but use Joule(metric unit, Newton*meter) instead.
Wut? I though it was unit of power per mass of machine. Why, just why?
(side note, thank you for the explanation)
Ffs USA. YOU'RE ALREADY USING kW, JUST GO FULL METRIC ON POWER. Please I'm begging you.
COP = heat moved / power input
kW_out / kW_in = dimensionless value
An air-conditioner with a COP of 2 moves 2 kW of heat for every 1 kW of electrical power you put in.
This hurts so much to find out because the US is already using BTU/hr 🤢. What do you need yet another unit for power for?
You're using W, BTU/hr and ton/day?
Like. Why are you doing this?
😭 look what they did to my boy (units)
That makes sense actually. Thanks!