During trail on single cylinder, four stroke oil engine the following observations were recorded:

Bore and stroke: 300mmX450mm,

Duration of trial: 60 min,

Engine speed: 220 RPM,

Fuel consumption: 7kg,

Calorific value of fuel: 45000KJ/kg,

Indicated mean effective pressure: 5.867 bar,

Net brake load: 130 kg,

Brake drum diameter: 1650 mm,

Total weight of jacketed cooling water: 500kg,

Temperature rise of jacket cooling water: 40 degree centigrade,

Temperature of exhaust gases: 300 degree centigrade

Air consumption: 300kg,

Specific heat of exhaust gases: 1.004 KJ/KJK

Room temperature: 25℃,

Determine: Mechanical efficiency, indicated and brake thermal efficiency and heat balance sheet on minute and percentage basis.

Mechanical Efficiency:

$$\eta = \frac{{B.P.}}{{I.P.}}$$

$$B.P. = \frac{{2\pi NT}}{{1000}} = \frac{{2\pi N(mgr)}}{{1000}} = \frac{{2\pi \times 220 \times 130 \times 9.81 \times 825}}{{60 \times 1000}}$$

$$B.P. = 24.24{\text{ KW}}$$

$$IP = \frac{{100 \times {P_m} \times LAn}}{1}$$

$$ = \frac{{100 \times {P_m} \times LAn \times no.{\text{ of cyllinders}}}}{2}$$

$$ = \frac{{100 \times …