The engineering to figure this out is beyond me!
I have a freshwater hot water tank that holds 30 liters of water. It is heated by hot water (coolant) running through an internal pipe (the heat exchanger). The heat exchanger pipe is 304SS, 17mm diameter and is 850mm long.
Based in input temperature of 10°C and output temperature of 60°C and assuming that the 75°C coolant is flowing through the heat exchanger pipe at 24 liters per minute, how long will it take to heat the entire tank of water?
The tank is sort of like this cut-away image (the heat exchanger pipe is the lower pipe, ignore the electrical element protruding from the middle of the tank).
If someone can give me an idea of heat rise rate or where/how to figure it out, would be appreciated.
Actually this is in relation to an upgrade we are planning for our sailboat to figure out if upgrading our hot water heating system is a worthwhile investment.