ARE 346P/CE 389H
Homework Assignment 3 February 10, 2009
DUE: February 24, 2009 80 pts total
1. Problem 7.1 - 10 pts
2. Problem 7.21 - 5 pts
3. Problem 7.3 - 5 pts
4. Problem 7.4 - 5 pts
5. Problem 7.27 - 10 pts
6. Problem 8.5a,b,d - 15 pts
7. Problem 8.17 - 15 pts
8. Problem 8.20 - 15 pts
Hints/Answers:
1. a) 68.4 °F b) 0.679 c) 13.929 ft3/lbmad) 35.658 BTU/lbma
3. a) Ws = 0.01576 lbmw/lbma νs = 13.70 ft3/lbma
4. What is critical condition for condensation?
5. a)Difficult to read protractor. Try calculating Δh/ΔW instead. SHR = 0.8h/Δh/ΔW instead. SHR = 0.8W instead. SHR = 0.8
7. and 8. Both of these problems are similar to logic puzzles. Look at each individual process
and there will be one process that will only have one unknown. One you solve for this unknown,
the other processes can then found one at a time.