Consider a Diesel cycle that starts (at point a in Fig. 20.7) with air at temperature Ta.

Question:

Consider a Diesel cycle that starts (at point a in Fig. 20.7) with air at temperature Ta. The air may be treated as an ideal gas.
(a) If the temperature at point c is Tc derive an expression for the efficiency of the cycle in terms of the compression ratio r.
(b) What is the efficiency if Ta = 300 K, Tc = 950 K, Y = 1.40, and r = 21.0?