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'94 115 Johnson starts in driveway but not in the ocean?
"A prudent man foresees the difficulties ahead and prepares for them; the simpleton goes blindly on and suffers the consequences." - Proverbs 22:3 Reply: The idea is to get the exhaust temp down, so less heat is lost in the engine cycle, so your observation is only indirectly helpful. Sorry. Thanks. For the previous haranguer: I can't drink caffeinated beverages, due to pancreatitis. I used to drink 10 -15 cups a day, but had to quit. Part of the problem is that all that caffeine causes dehydration, and thirst, which is only made worse by caffeine, which being a stimulant also causes spasms in the pancreatic duct sphincter, I figure. I'm always this hyper, sometimes called enthusiastic. To continue, the boiling temperature will be affected by cylinder pressure, and it may be that it won't work for that reason. A thermodynamacist might be able to say. Where's all the big mouth mathemeaticians that regularly abuse each other around here? Yes timing is important. The small, lean fuel explosion must be quick and complete, so the water injection can have some time to do it's magic. The preheated water idea seems relevant, if you can preheat the water somewhat before injecting it, so the internal combustion steam engine would still want some external combustion happening, but the actual amount of water might be really small. How come some research body doesn't offer a little of the essential data, as they MUST have tried this? I can't find any data on the net. Maybe this really is is my idea? Terry K |
#2
posted to rec.boats.building
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'94 115 Johnson starts in driveway but not in the ocean?
Terry K wrote:
"A prudent man foresees the difficulties ahead and prepares for them; the simpleton goes blindly on and suffers the consequences." - Proverbs 22:3 Reply: The idea is to get the exhaust temp down, so less heat is lost in the engine cycle, so your observation is only indirectly helpful. Sorry. Thanks. Except that you cannot have condensation in the cylinder, or you'll waste energy pumping it out (and you'll never get it all out, and eventually raise the compression due to the water in the cylinder, and either break a rod or wrist pin or blow the head gasket.) Water isn't compressible. You'd have to keep the cylinder temp above the condensation point. If you use this exhaust heat to preheat the incoming water, you'll not waste it. Otherwise you have to use the heat of combustion to heat the incoming water charge to get it to turn to steam. Save the BTU's! For the previous haranguer: I can't drink caffeinated beverages, due to pancreatitis. I used to drink 10 -15 cups a day, but had to quit. Part of the problem is that all that caffeine causes dehydration, and thirst, which is only made worse by caffeine, which being a stimulant also causes spasms in the pancreatic duct sphincter, I figure. I'm always this hyper, sometimes called enthusiastic. To continue, the boiling temperature will be affected by cylinder pressure, and it may be that it won't work for that reason. A thermodynamacist might be able to say. Where's all the big mouth mathemeaticians that regularly abuse each other around here? Yes timing is important. The small, lean fuel explosion must be quick and complete, so the water injection can have some time to do it's magic. The preheated water idea seems relevant, if you can preheat the water somewhat before injecting it, so the internal combustion steam engine would still want some external combustion happening, but the actual amount of water might be really small. How come some research body doesn't offer a little of the essential data, as they MUST have tried this? I can't find any data on the net. Maybe this really is is my idea? It's actually a good idea, and it would be (probably) fairly efficient, but you'll have issues with erosion of the cylinder and other metal parts. Perhaps ceramic coating?? Terry K -- "A prudent man foresees the difficulties ahead and prepares for them; the simpleton goes blindly on and suffers the consequences." - Proverbs 22:3 |
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