Register to reply

AC and Heat Pumps

by Jobrag
Tags: heat, pumps
Share this thread:
Aug27-13, 08:12 AM
P: 477
On a hot day the AC in my car starts working immediately pumping cool air, on a cold day I have to wait till the cooling system heats up before I get warm air. It would be perfectly possible (with the aid of a couple of solenoid valves) for the AC unit to run as a heat pump providing immediate warmth, why don't motor manufactures fit a system like that? Is it just cost?
Phys.Org News Partner Engineering news on
Researchers use 3D printers to create custom medical implants
For secure software: X-rays instead of passport control
Razor-sharp TV pictures
Aug27-13, 09:04 AM
Sci Advisor
PF Gold
dlgoff's Avatar
P: 2,719
So you don't want to use the heat generated by the engine; just loose it?
Aug27-13, 11:29 AM
P: 22,287
It is a big expense for something only used for 5 min per day.

Aug29-13, 11:24 AM
P: 2,509
AC and Heat Pumps

Yeah it's pretty much the same old story. Anything that is physically possible can be done, but at a cost.
Sep4-13, 04:48 AM
P: 44
Simple fix, and it's found in most hybrid cars and some diesels...PTC heater.
Sep10-13, 09:42 AM
P: 143
My son in law in the cold north, uses a remote starter.
Starts his car about 5 min before he gets out of work.
This method also works for cooling the car down in summer.
It does cost some extra fuel, but if it's -20F, it's worth it.
The answer to your original question is Yes it is possible,
but the engine heat is already there, no need to squeeze
your own out of the air.

Register to reply

Related Discussions
Heat pumps Advanced Physics Homework 0
Heat pumps Classical Physics 5
Phase change in heat engines & heat pumps Mechanical Engineering 4
Thermo - Heat Engines, Heat Pumps Introductory Physics Homework 10
Heat Pumps Advanced Physics Homework 2