Draw heat balance sheet on the basis of kJ/min.

Question

During a test on a two stroke engine on full load, the following observations were recorded:

Speed = 350 rpm

Net brake load = 590 N

Mean effective pressure = 2.8 bar

Fuel oil consumption = 4.3 kg/h

Cooling water required = 500 kg/h

Rise in cooling water temperature = 25⁰C

Air used per kg of fuel = 33 kg

Room temperature = 25⁰C

Exhaust gas temperature = 400⁰C

Cylinder diameter = 220 mm

Stroke length = 280 mm

Effective brake diameter = 1 m

C.V. of fuel oil = 43900 kJ/kg

Proportion of hydrogen in fuel = 15%

Mean specific heat of exhaust gases = 1.0 kJ/kg-K

Specific heat of steam = 2.09 kJ/kg-K

Calculate the following:

1. Indicated power
2. Brake power

Draw heat balance sheet on the basis of kJ/min.