DSK
New Member
Hello All,
I am new to this forum and also just traded up in size to a bigger boat.
The engine is a BUKH 20, which I think was originally raw water cooled, and at some point, converted to an indirect cooled system with an external heat exchanger, in turn, cooled by raw water.
It has a calorifer alreadey fitted. But to "activate" it requires swapping over 4 valves. 2 of which blank coolant water to/from the heat exchanger, and the other 2 blank coolant water to/from the calorifier coil. So the operation to heat the calorifier is to close the valves to the heat exchanger, and open the valves to the calorifier. The coolant from the engine is therefore either going to the heat exchanger, OR to the calorifier.
This seems strange to me, and I was thinking that it would be better if the calorifier and the heat exchanger were connected in series permanently. So that hot coolant exits the engine into the calorifier, then out of the calorifier and into the heat exchanger before being returned to the engine.
Does that sound sensible, and indeed how calorifiers should be installed on indirect cooled engines?
Thanks
DSK
I am new to this forum and also just traded up in size to a bigger boat.
The engine is a BUKH 20, which I think was originally raw water cooled, and at some point, converted to an indirect cooled system with an external heat exchanger, in turn, cooled by raw water.
It has a calorifer alreadey fitted. But to "activate" it requires swapping over 4 valves. 2 of which blank coolant water to/from the heat exchanger, and the other 2 blank coolant water to/from the calorifier coil. So the operation to heat the calorifier is to close the valves to the heat exchanger, and open the valves to the calorifier. The coolant from the engine is therefore either going to the heat exchanger, OR to the calorifier.
This seems strange to me, and I was thinking that it would be better if the calorifier and the heat exchanger were connected in series permanently. So that hot coolant exits the engine into the calorifier, then out of the calorifier and into the heat exchanger before being returned to the engine.
Does that sound sensible, and indeed how calorifiers should be installed on indirect cooled engines?
Thanks
DSK
