Heat storage device for car cabin heater Answered
I want to increase the heat storage capacity of the existing car heater so that I can run the heater (just the fan and a liquid pump) while the engine is off and so I can have a warm car as soon as I start on a cold day. The current heat storage is the coolant circulating in the engine. I want to increase the capacity of that.
Instead of simply attaching a liquid reservoir to the heater circuit (to increase the coolant volume), I was considering using a picnic cooler (insulated) box with a coper tube coiled in it. The box would be filled with oil and paraffin. Paraffin melts ≈ 40° C and I can take advantage of the latent heat of fusion when the paraffin changes phase. The oil is a medium to suspend the paraffin.
I need a recommendation of an electric 12 volt pump to circulate the fluid.
I request any other thoughts or criticisms.