In the course of an experiment, a plate heat exchanger used to transfer heat from a hot to a cold water flow is tested, and the following measurements are taken:

The area of heat transfer is 0.0600m (a) Calculate the rate of heat transfer to the cold water. (b) Calculate the total heat transfer coefficient, c) Determine if the heat exchanger is adiabatic, if it is not, determine the fraction of heat loss and calculate the heat transfer efficiency in this exchanger.

\begin{tabular}{|c|c|c|} \hline & hot fluid & cold fluid \\ \hline Inlet temperature ( "C ) & 40 & 11 \\ \hline Outlet temperature (C) & 25 & 20 \\ \hline Volumetric flow (L/min) & 120 & 180 \\ \hline \end{tabular}