The following particulars were obtained in a trial on a four-stroke gas engine:
Duration of trial = 1 hour
Revolutions = 14,000
Number of missed cycles = 500
Net brake load = 1,470 N
Mean effective pressure = 7.5 bar
Gas consumption = 20,000 liters
L.C.V. of gas at supply conditions = 21 KJ/Liter
Cylinder diameter = 250 mm
Stroke = 400 mm
Effective brake circumference = 4 m
Compression ratio = 6.5:1
Calculate:
Indicated power
Brake power
Mechanical efficiency
Indicated thermal efficiency