MAE 336-FE TAKE HOME - Spring 2020
MAE 336- Section 2 – FINAL EXAM - TAKE HOME: PAGE 1
FINAL EXAM – TAKE HOME (PART 1 – 35% of Final Exam Grade)
MAE 336 – Section 2 - Spring 2020
Instructor: Dr. Jalal Torabzadeh
Due: Saturday, May 16, 2020 (by 11:59 PM)
Please submit your .PDF file to the specified Dropbox Folder on BeachBoard
Student Name: _______________________________________________
Last 4 Digits of SID: ___________________________________________
INFORMATION:
Please submit your solution in ONE .PDF file and ensure that all parts (a-g) are
clearly labeled.
Please state any assumptions made.
PROBLEM:
1. In a gas power plant, liquid normal Butane (n-Butane, C4H10) is used as the fuel in the
combustion chamber. The fuel enters the combustion chamber at 25°C and 10 atm at
a rate of 0.7 kg/min. The fuel is burned with 180% excess air that is compressed to 10
atm and preheated to 500 K before entering the combustion chamber. The products of
the combustion are used as the working fluid in a gas power plant and enter the
tu
ine at 1400 K and 10 atm. The gas leaves the tu
ine at 800 K and 1 atm. The
adiabatic efficiency of the tu
ine is 80% and the su
ounding temperature is 25°C.
The combustion process is complete.
Draw a schematic diagram of the system and determine:
a. The ai
fuel ratio.
. The mass flow rate and the volumetric flow rate of air needed for this combustion.
c. The rate of heat transfer from the combustion chamber.
d. The power output of the tu
ine.
e. The rate of entropy generation (the net rate of change of entropy).
f. The rate of i
eversibility (exergy destruction) during the whole process.
g. Show these processes schematically on a T-s diagram.