University:
Swansea University
Course:
EG-086 | Engineering Science
Academic year:

2023
Views:

65

Pages:

4
Author:

Lloyd R.

Q. An engine develops Petul (5.8 kylhu) Calculat 20 kW of Brake power with rot. mechanical (i) Brate thermal efficiency. (ⅱ) Specific fuel consuption. (ii) Indicated thermal efficiency. if there f = 42,000 Ks/kg Solution: Fuel power mj x cov (1) Brake themal efficieng efficiory 103x42,000 1.611x10 - 67:662 kl 12 Brake power fuer power- 20 29.56% 67662 (ii) specific fuel concuption? Fuel Consumption #gth. Brake power 5.8 -0.29.1kg/kwh 20 BP Mech- BP 20 25 KW Nmer 0.8 (in) Indicated thesal efficiency: Indicated power x100 JRE actuel power = 25 X100 = 36.95% 11 18 KW 64-66 Q. Brake power Stroke of th engine Relative fuel efficiency at 3000 rpm. Dia of cylinder, 95 nom, Clearance volume- = 653 65033 on Brake power basic 50% Calorific value 46,000 and mechanical eftiriony so%. Calural (1) nairstadad (#) MBT (N) SFC to Crod" 4 yue Thic 4-stroke oil erophe Warkes on The Hollowing Area of indicatul ready diagra wed under at full Load 3cm Leyth of indicats dragions spuby Cousteant lo bar/es. 40mm speed of the speed of the engome -400 rpm. Load of the breike- 350 N, T P balance reading = 50N. Spring Dia of brake dran 120 cm. L- fud consumption, 42,000 kolky 28 CV= T-FR (W-w) R Dia of the Stroke of Cylinder - 16 cm. the piston 20 uックコット frod (i) triction power of the orghe Mechanted η. (in mak 429 5 (iv) Brake Mean Effective pressure.