During an experiment, a plate heat exchanger that is used to transfer heat from a hot-water stream to a cold-water stream is tested, and the following measurements are taken:

The heat transfer area is calculated to be 0.0400 m².
(a) Calculate the rate of heat transfer to the cold water.
(b) Calculate the overall heat transfer coefficient.
(c) Determine if the heat exchanger is truly adiabatic. If not, determine the fraction of heat loss and calculate the heat transfer efficiency.
(d) Determine the effectiveness and the NTU values of the heat exchanger. Also, discuss if the measured values are reasonable.

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Inlet temperature, °C Outlet temperature, °C Volume flow rate, L/min Hot water stream 38.9 27.0 2.5 Cold water stream 14.3 19.8 4.5