Question

(6%) Problem 7: A certain heat engine performs a cycle described by the curve A-BCDA in the p-V diagram shown in the figure. The segments between the designated points are all straight. The values of the pressures and volumes at the designated points are: Р(10° Ра) А РА Рв Randomized Variables VA 0.65 x 10-3 m' В VB 3.7 x 10-3 m3 D PA = 2.65 x 106 N/m2 РD Рс PB 1.92 x 106 N/m2 Pc 0.65 x 106 N/m2 PD 1.46 x 106 N/m2 VA VB V(103m2) В Otheexpertta.com Calculate the net work output of the heat engine, in joules, over a single cycle of operation. Grade Summary W = Deductions 6%

Answer 1

p (10ʻPa) Net work output = area of figure ABCD =PA PB) CVA-VB) + (Po-Po) (VA-VO) + Ź (Po-Pc) CVA-YO) = + (0.73 X10€) 3:05X10-3) +(0.46 X 10^)(3.05 X10-3) + (0.81X106) (3.0581043) = 3.7515 x 103 ñ 3.8 X 103 ] V, V (103 m)