Hybrid Car – More Fun with Less Gas

what is the use of the water cooling in this honda generator? - Page 5

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Posted by Bob F on November 1, 2009, 9:09 pm

Bruce in alaska wrote:

How does this heat exchanger affect stovepipe cleaning? Is creosote buildup on
the exchanger a big problem?

Do you electrically insulate the copper from the stainless to avoid corrosion?

Posted by Bruce in alaska on November 2, 2009, 6:08 pm

Since this Stovepipe connects to a Metal-Bestous Chimney we take the
uninsulated sections out while cleaning the chimney, which necessitates
the disconnection of the Heating Coil. Usually we just bang on the
outside of these sections to knock all the soot off the insides while
cleaning. Not really much buildup other that LampBlack Soot....

Nope, never had a significant problem in the 2 decades the coil has been
in use.  Biggest problem we have seen is we have to replace the coil
every ten years or so due to Calcite buildup inside, caused by hard

Bruce in alaska
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Posted by Bruce in alaska on October 30, 2009, 7:39 pm

In article

It would seem that your figures above, are a bit suspect. Where do they
come from? The Rule of Thumb, for Diesel Engines, has always been the
1/3, 1/3, 1/3 Rule. 33% of the fuel BTU's goes arf1656331a13ae out the
Crankshaft, 33% of the BTU's goes out the Cooling System, and 33% of the
BTU's go up the Stack. 75-85% of the Cooling BTU's are recoverable in a
Liquid Cooled engine, and about 50% of the Exhaust BTU's are Recoverable
when using a Marine type Water Jacketed Exhaust Manifold. This makes, on
average, between 70-80% of the Fuel BTU's useful in an efficiently
designed Co-Gen operation using a Liquid Cooled Diesel Genset. I find in
practice that these are fairly close to real world numbers.

Bruce in alaska
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Posted by harry on November 1, 2009, 8:05 pm


This would be the upper limit, not achievable in practice.
Bit here on the topic about the maximum theoretical efficiency of heat

Posted by Bruce in alaska on October 25, 2009, 8:40 pm

Water cooling tends to keep the engine temps more stable and uniform
across the entire Block, where as Air Cooling will tend to have Hot
Spots, which can cause wear problems. also as Vaughn states, Water
Cooling gives the operator more opportunities for co-Genertion.

Bruce in alaska
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