Assignment No. 3
Name: ………………………………….…..
ID No. …………………………….
Course: POWER PLANT
Course Code: ME-460
ABET Outcome: a
Topics: Diesel power plant and
economic of power plant
Q1. A four-stroke diesel engine has a piston diameter of 16.5 cm and a stroke of 27 cm. The
compression ratio is 14.3, the cut-off 4.23% of the stroke and the mean effective pressure
4.12 bar. The engine speed is 264 rev/min and the fuel consumption is 1.076 kg of oil per
hour, having a calorific value of 39150 kJ/kg. Calculate the relative efficiency of the engine.
Q2. A diesel engine develops 200 H.P. to overcome friction and delivers 1000 BHP. Air
consumption is 90 kg per minute. The air fuel ratio is.15 to 1. Find the following:
(a) IHP, (b) Mechanical efficiency, (c) Specific fuel consumption.
Q3. Determine the thermal efficiency of steam power plant and its fuel bill per annum using the following
data:
Maximum demand = 24MW
Load Factor =40%
Boiler Efficiency = 90%
Turbine Efficiency = 95%
Fuel Consumption = 0.9 kg/ unit
Fuel Price = SR 0.35/ kg
Q4. The peak load on the power plant is 60 MW. The load having the maximum demand of 30
MW, 20 MW, 10 MW and 14 MW are connected to the plant. The plant having the capacity
of 80 MW and annual load factor 0.5. Estimate
a. Average load on the power plant.
b. Energy supplied per year
c. Demand factor
d. Diversity factor