Academics – Applied Heat : 2017/OCT/02
Question
Q2. The air standard efficiency of Otto cycle is 68.73 % and the indicated mean effective pressure is 5 bar.
The minimum pressure and temperature in the cycle are 1.05 bar and 30℃respectively.
(a) Sketch The cycle on pressure-Volume and Temperature-specific entropy diagrams (2)
(b) Calculate EACH of the following:
(i) The volume compression ratio; (2)
(ii) The specific work output; (4)
(iii) The maximum cycle temperature; (6)
(iv) The maximum cycle pressures. (2)
Note: for air, γ = 1.4 and cv = 718 J⁄(kg K) .
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