Alcohol enters the inner tube of a double-pipe heat exchanger (.. = 0.0874 , . . = 0.1096 ) at 2000 and exits at 100. This is cooled by water flowing inside the jacket at an average temperature of 60. Use a basis of a unit length of each pipe for the calculation process.

1. If the mass flow rate of the alcohol is 10,000 / and its specific heat = 0.60 / , find the constant rate of heat transfer () from the alcohol to the cooling water.

2. Compute the heat exchanger area 0, the basis for the overall heat transfer coefficient 0 = 200 / 2 .

3. Determine the temperature of the inner surface of the inner tube 1, given the following individual heat transfer coefficient: = 200/ 2 , = 50 / 2 , and = 500 / 2 .

4. Find the temperature of the outer surface of the inner tube. Use = 26/ , the thermal conductivity of steel.

5. If the individual resistance to heat flow to the outer fluid does not involve radiation or fouling, calculate this resistance based on the outer surface area of the inner tube. Use = 250/ 2 .