AC Peoples...

olds

Elite Member
Mar 3, 2000
50,124
779
126
I don't remember what this principle is called. Enlighten me.
The outside air temp is 56 degrees Fahrenheit. The AC inside will only go down to 66 degrees Fahrenheit. Why won't the inside temp go lower?
When it's 90 out, it gets down to 62 easily.

EDIT
Super cooling?


truckac.JPG
 
Last edited:

BurnItDwn

Lifer
Oct 10, 1999
26,353
1,862
126
It's called "whe the fvck sets their Ac below 66" ?


That said, I would set it to like 45, just to make my passengers angry.
 

olds

Elite Member
Mar 3, 2000
50,124
779
126
It's called "whe the fvck sets their Ac below 66" ?


That said, I would set it to like 45, just to make my passengers angry.
There's 17 computers and 4 driving simulators inside the trailer. We have to keep it cool or the computers heat it up and people start getting "car sick".
We try to keep it around 62.
 

dud

Diamond Member
Feb 18, 2001
7,635
73
91
It's called "whe the fvck sets their Ac below 66" ?




The very best engineering answer I've heard in a long time.

One of the most difficult things that engineers do is try to explain highly complex technical issues in street language, so the rest of the world can understand. I should use this type of answer at work. That's about as much street language you can fit in one sentence.


Bravo!
 

ElFenix

Elite Member
Super Moderator
Mar 20, 2000
102,402
8,574
126
they regulate the minimum temp to keep ice from forming.
 

Lifted

Diamond Member
Nov 30, 2004
5,748
2
0
Easy. Just buy a refrigerator, place it in the back of the truck, and keep the fridge and freezer doors open.
 

CrackRabbit

Lifer
Mar 30, 2001
16,642
62
91
A: You are using the wrong type of trailer. You need a freezer trailer if you want the bodies to keep long enough for you to dump them without suspicion.
 

grrl

Diamond Member
Jun 21, 2001
6,204
1
0
I believe super cooling is the term, but we need someone like Seamoose to confirm it.
 

Kadarin

Lifer
Nov 23, 2001
44,296
16
81
If you don't get a good enough answer from the AC people, try asking the DC people.
 

Rubycon

Madame President
Aug 10, 2005
17,768
485
126
The term is subcooling although that's not really the reason why it isn't getting colder. Most trucks use refrigeration - not air conditioning. ;)
 

Toastedlightly

Diamond Member
Aug 7, 2004
7,214
6
81
Its most likely because the design pressure of the refrigerant only cools the coils to 66 F. Do you know what kind of refrigerant is being used in the system and pressure... ?
 

grrl

Diamond Member
Jun 21, 2001
6,204
1
0
Its most likely because the design pressure of the refrigerant only cools the coils to 66 F. Do you know what kind of refrigerant is being used in the system and pressure... ?

That's much too warm for any kind of cooling or even dehumidification. You need a TD of at least 15-20 degrees to get any significant cooling effect.