Quote:
Originally Posted by teoman
The more powerful the heater the less waste you will have.
If you could pump in several kwh quickly, then you would avoid heat loss.
Too quickly can be a problem though. If it is too quick you can get uneven warming.
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Could this be somewhat circumvented by circulating the coolant via a pump and heating the coolant, not the block?
I'm thinking about an electric pump circulating the small coolant cirquit and a heating element dumping a few kW of heat into it untill a sensor detects the coolant reaching near operating temperature.
If the engine is evenly heated by the coolant over a timeframe of roughly 10-20 minutes, uneven temperature distribution would be minimized and heat losses to the enviroment would be reasonably low.
In case of my car, I'd install the required systems inbetween frunk and firewall.
There would be sufficient space and I have access to the plumbing for the heater core.
Maybe running power to the cabin ventilation as well to heat up the cabin as well so it has a comfortable temperature as well as de-iced windows as soon as I get into the car.
Just an idea...