Thread: Peltier coolers in a car?

Umm - what're you running that runs hot enough to need a peliter to cool it with?

A few cars ago I had liquid cooled an old and heavily modified RODEK 2300 pushing 1600Wrms x 2 into a 2 Ohm load by making a thin tank out of the outside of the case/heat sink, running to a auto transmission cooler (about 8”x16”x1.5”) mounted under the rear bumper with a small electric radiator fan that kicked in if the coolant reached 90F, a 12Vdc fish live-well water pump, and a 1/4 gallon tank.

Before this was done the trunk would heat to about 130F and the amp’s heat sink would burn you as well as melting internal solder joints

After the amp never failed again, the trunk stayed cool, and the internal amp temp never broke 100F

Some other pointers:

Have the water pump pull from the bottom of your reservoir feed into the bottom or lowest point of your heat sink(s) drain from the top of your heat sink(s) to the bottom of the radiator and from the top of the radiator to the reservoir.
This keeps air pockets to a minimum and is self-purges any bubbles.

Your reservoir should be the highest point in the loop

Remember this should be coolant (antifreeze) not just water, one cold night and you’ll know why.

All tubing, tanks, pumps should be compatible with coolant.