A two-shell-four-tube-pass heat exchanger has an overall heat exchanger conductance of 350 W/m^2?K and is used to cool 10 kg/s of engine oil from 180ºC to 80ºC. If water at 20ºC is used to cool the oil and the water temperature leaving the heat exchanger is 60ºC, determine (a) mass flow of water required and (b) surface area of the heat exchanger.
What will be an ideal response?
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