For a senior project, a student was given the assignment to design a heat exchanger that meets the following specifications: Like many real-world situations, the customer hasn't revealed, or doesn't know, additional requirements that would allow you to proceed directly to a final configuration. At the outset, it is helpful to make a first-cut design based upon simplifying assumptions, which can be evaluated to determine what additional requirements and trade-offs should be considered by the customer.

(a) Design a heat exchanger to meet the foregoing specifications. List and explain your assumptions.

(b) Evaluate your design by identifying what features and configurations could be explored with your customer in order to develop more complete specifications.

in (kg/s) Tm, C) 28 27 T "C) Hot water Cold water 90 60 34 18