Water (cp = 4182 J/Kg.K) at a flow rate of 45500 Kg/hr is heated from 80oC to150oC in a shell and tube heat exchanger having two-shell-passes and eight-tubepasses with a total outside heat transfer surface area of 925 m2. Hot exhaust gaseshaving approximately cp as air (cp = 1050 J/Kg.K) enter at 350oC and exit at175oC. Determine the overall heat transfer coefficient based on the outside surface area of the heat exchanger.

A shell and tube heat exchanger is designed as a counter flow type. Water (cp = 4182 J/kg.oC) enters the shell side at 30 oC with a mass flow rate of 12.5 kg/s. A mass flow rate of 19.5 kg/s of engine oil (cp = 1060 J/kg.o C), enters the tube side at 300 oC. Each tube is having an inner diameter of 36 mm and a wall thickness of 2 mm, and a length of 3 m. If the heat exchanger effectiveness is 60 %, calculate the following:1. The heat transfer rate,2. The exit temperature for each fluid,