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Old 11-10-2011, 04:47   #16
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Re: Heating with Waste Heat from the Engine

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Originally Posted by O.C.Diver View Post
Also consider when doing your install, plumbing the furnace in such a way as it acts as a preheater for your engine. This is common on RV bus conversions in the North. They use a Webasto hydronic heater to heat the bus and also act as an engine preheat.
All I need is the circulation pump in the fresh water circuit, in order to be able to transfer heat in the other direction -- from the Espar to the engine, to preheat it.

It's not a priority for me -- my Yanmar starts without glow plugs even in sub-freezing temperatures, if I so much as squint my eyes at the start button. But I guess it would save some wear on the engine, having it warm before starting it in cold weather.
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Old 11-10-2011, 04:52   #17
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Re: Heating with Waste Heat from the Engine

So a plan is shaping up -- thanks for all the very helpful input.

I will install a water-to-water heat exchanger between engine fresh water cooling circuit and Espar heating system circuit, at the calorifier.

I will install a circulation pump, maybe something like this: Bolin Pump EVP 500

Anybody see anything wrong with this plan? Is it ok to install a circulation pump like that, in my engine's fresh water cooling circuit? Will it screw anything up? One thing I like about the Bolin pump is that when it is switched off, you still have normal flow through it, as if it is not there.
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Old 11-10-2011, 05:18   #18
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Re: Heating with Waste Heat from the Engine

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Originally Posted by S/V Alchemy View Post
Translation to North American: "Calorifier" is "hot water heater"...
In point of fact, shouldn't we be calling it a "cold water heater"?
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Old 11-10-2011, 05:46   #19
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Re: Heating with Waste Heat from the Engine

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In point of fact, shouldn't we be calling it a "cold water heater"?
Sometimes it isn't about the journey but about the destination. I think this would be one of those.
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