A process fluid having a specific heat of 3500 J/kg ∙ K and flowing at 2 kg/s is to be cooled from 80°C to 50°C with chilled water, which is supplied at a temperature of 15°C and a flow rate of 2.5 kg/so Assuming an overall heat transfer coefficient of 2000 W/m² ∙ K, calculate the required heat transfer areas for the following exchanger configurations:

(a) Parallel flow,

(b) Counter flow,

(c) Shell-and-tube, one shell pass and 2 tube passes, and

(d) Cross-flow, single pass, both fluids unmixed. Compare the results of your analysis. Your work can be reduced by using the Tools/Heat Exchanger models of IHT.