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3. A diesel engine operates with a compression ratio of 20 and a cutoff ratio of 2. Air enters the engine at 80°F and 14.7 psi. Assume an Air-Standard analysis in the calculations to follow. (a) (10 points) Find the conversion efficiency of the engine. (b) (10 points) Find the specific net work of each cycle in BTU/lbm (c) (5 points) Find the volume of the cylinder if 0.03 Ibm of air is drawn in each cycle at bottom dead center

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p:20 PI Qin T, :80%; 300K Pups wout Wnet linde TDC BDC 丨-2 Ise topic Compsession 2-3 Constant Pressuse heat oddition 3-u Tsen(20). 300 : 300 Fos 2-3, B= T2 T3 V33 132 ·13 = 1988472k4 mx 1.005. x (488.672-994.336) a 2-3 ะ 1000 k70 OY L129 ,923 BTU İbm 2-3 wneth-3 뷰 0.646x 429.923 brom,0,03 l bm 13,6 x10% 6.78S9 x 106 (2%-V2)v,= o.oo2.x 20 Volume d cid Vi-V 0 038 m3- An s

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