Evaporating Heat Exchanger

The evaporating tank is a constant pressure heat exchanger operating on the low pressure side of the system. In this heat exchanger, a low temperature, two phase mixture of freon liquid and vapor adsorbs heat from the water and the liquid evaporates and the vapor then is heated to approximately room temperature.

The heat adsorbed by the freon can be measured from a knowledge of the water flow through the tank together with its inlet and outlet temperature. This heat adsorption should be compared to the estimated heat required to cause the freon phase change and heat the vapor to its final temperature.

Apply energy balance considerations to this heat exchange process. Do you get the result that you expect?