Originally Posted by hpeer
I have a wee Volvo MD7A, runs a champ. Never seen an engine so willing to start and run. I'd like to keep it forever. Any good way to convert it to fresh water cooling? Seems like I could just add a heat exchanger and pump, but what size?
And another clarification.....on this engine the water circuit runs first through the transmission
, then to the water pump on the engine, and then things get normal.
Is this a car or a boat? Is your plan to use your car engine in a boat?
If the latter, it would make sense to convert the boat's engine cooling from raw to fresh.
Heat exchangers--- I can only offer suggestions. You must know the fuel
consumption/hour along with the raw water
temperatures expected. Now at this point I am guessing that heat exchangers are rated in BTU/hr with certain raw water flow rates at temperatures. From that you should be able to make a sensible guess on the size needed.
For example, the flow rate under various head
pressures are given for most pumps. Next, a gallon of home heating oil
contains... if I remember correctly about 144,000 BTUs. If you then know the fuel consumption
, you know how many BTUs need to be transferred via the heat exchanger.
Yes, I know some of the fuel's energy is converted to mechanical energy but I am trying to keep it simple.