Cooling water from a river flows through the condenser (the low-temperature heat exchanger) at the rate of (?
The transferred amount of heat Q equals the mass flow rate m kg/h times the specific heat c kJ/kgK and the temperature raise of the cooling water deltaT K. So Q = m*c*deltaT or m = Q/c*deltaT. deltaT is regulated by environmental laws, because the live of plants and fishes in the river allows only a certain deltaT.
