cygnusv
Well-Known Member
Thought I'd post here to save time because I'm certain someone here has solved this problem. I'll do the searches if I'm wrong.
Our old engine, 1950 vintage, does not have a thermostat or a 'housing' to fit one like on modern engines. Engine temperature is controlled by the heat exchanger and Jabsco (indirect) raw water pump. This keeps everything happy at between 140 - 180 (max) degrees fahrenheit. However, when we leave our mooring, water circulates through the calorifier coil back to the engine and the heat is lost until the engine temperature replaces the heat. If we idle for any time the engine temperature reduces, and again drags heat from the calorifier.
The feed and return pipes to/from the calorifier / heat exchanger are 1 inch (25mm I.D.)
My idea of a neat solution would be.... A couple of inches from where the heated engine water leaves the cylinder block I've fitted a 'tee'. The straight through part of the 'tee' is a direct line of hot water from the engine to the heat exchanger. The vertical 'stick' of the 'T' takes water to the calorifier. Water is drawn down the 'stick' because I've plumbed the return (from the calorifier) to be pulled by the engine's closed system circulating pump. I'd like to find a hose fitting that is 1 inch 'in' and 1 inch 'out', basically a straight connector with a thermostat in the middle.
This could work if fitted in the hose to the calorifier, by preventing circulation from a cold engine (This would however, require a quite low temperature thermostat as the average engine operating temperature is only 150 - 160 degrees F or 60 -65 degrees celsius and I'm not sure that they are available at these low temps.). Alternatively, if I place the thermostat into the output from the engine, before the 'tee' to the calorifier, this would increase and 'level out' the engine operating temperature possibly making the engine more efficient as well as giving hotter water in the calorifier.
So. I'm looking for a 'straight through' 1 inch (internal diameter) radiator type hose, with a (replaceable) (standard) thermostat in the middle.
If I can find such a beast, I can experiment with where I place it for best effect.
Any thoughts?
Our old engine, 1950 vintage, does not have a thermostat or a 'housing' to fit one like on modern engines. Engine temperature is controlled by the heat exchanger and Jabsco (indirect) raw water pump. This keeps everything happy at between 140 - 180 (max) degrees fahrenheit. However, when we leave our mooring, water circulates through the calorifier coil back to the engine and the heat is lost until the engine temperature replaces the heat. If we idle for any time the engine temperature reduces, and again drags heat from the calorifier.
The feed and return pipes to/from the calorifier / heat exchanger are 1 inch (25mm I.D.)
My idea of a neat solution would be.... A couple of inches from where the heated engine water leaves the cylinder block I've fitted a 'tee'. The straight through part of the 'tee' is a direct line of hot water from the engine to the heat exchanger. The vertical 'stick' of the 'T' takes water to the calorifier. Water is drawn down the 'stick' because I've plumbed the return (from the calorifier) to be pulled by the engine's closed system circulating pump. I'd like to find a hose fitting that is 1 inch 'in' and 1 inch 'out', basically a straight connector with a thermostat in the middle.
This could work if fitted in the hose to the calorifier, by preventing circulation from a cold engine (This would however, require a quite low temperature thermostat as the average engine operating temperature is only 150 - 160 degrees F or 60 -65 degrees celsius and I'm not sure that they are available at these low temps.). Alternatively, if I place the thermostat into the output from the engine, before the 'tee' to the calorifier, this would increase and 'level out' the engine operating temperature possibly making the engine more efficient as well as giving hotter water in the calorifier.
So. I'm looking for a 'straight through' 1 inch (internal diameter) radiator type hose, with a (replaceable) (standard) thermostat in the middle.
If I can find such a beast, I can experiment with where I place it for best effect.
Any thoughts?
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