Which is the wrong assumption for calculation of air standard eff
A. All processes are reversible
B. Specific heat remains constant at all temperatures
C. No account of the mechanism of heat transfer is considered
D. Gases dissociate at higher temperatures
Please scroll down to see the correct answer and solution guide.
Right Answer is: D
SOLUTION
Explanation:
To simplify the analysis, the following assumptions are made for the calculation of air standard efficiency:
1. The working fluid is air, which continuously circulates in a closed loop and always behaves as an ideal gas.
2. All the processes that make up the cycle are internally reversible.
3. The combustion process is replaced by a heat - addition process from an external source.
4. The exhaust process is replaced by a heat - rejection process that restores the working fluid to its initial state.