Q4. The following observations refer to trail on a four-stroke dieselengine: IMEP=3 bar, rate of fuel= 8 kg/h, fuel calorific value= 44 MJ/kg,stroke= 50 cm, bore= 20 cm, speed3 300 rpm, brake load%3D1500 N andradius of brake drum= 0.8 m. Determine the following,Indicated powerbrake power, mechanical efficiency and overall efficiency

To find: The indicated power, brake power, mechanical efficiency and overall efficiency. Given: The…

Q4. The following observations refer to trail on a four-stroke diesel engine: IMEP=3 bar, rate of fuel= 8 kg/h, fuel calorific value= 44 MJ/kg, stroke= 50 cm, bore= 20 cm, speed%3 300 rpm, brake load=1500 N and radius of brake drum= 0.8 m. Determine the following,Indicated powe brake power, mechanical efficiency and overall efficiency

Q4. The following observations refer to trail on a four-stroke diesel engine: IMEP=3 bar, rate of fuel= 8 kg/h, fuel calorific value= 44 MJ/kg, stroke= 50 cm, bore= 20 cm, speed%3 300 rpm, brake load=1500 N and radius of brake drum= 0.8 m. Determine the following,Indicated powe brake power, mechanical efficiency and overall efficiency

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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3. The following data were noted for a four-cylinder, four-stroke engine: Diameter = 101 mm, stroke = 114 mm, speed = 1,600 rpm, fuel consumption = 0.204 kg/min, %3D heating value of fuel = 41,800 kJ/kg. Difference in either side of the brake pulley = 378 N, brake circumference = 3.35 m. Assume mechanical efficiency = 83%. Calculate (i) brake thermal efficiency, (ii) indicated thermal efficiency, (iii) mean effective pressure of cylinder, and (iv) fuel consumption per brake power.
1. A four stroke diesel engine gave the following test results at a speed of 450 RPM. Mean effective pressure - 850 kPa Cylinder bore - 22 cm. Stroke - 26 cm. Specific fuel consumption - 0.32 kg/BHP.hr Calorific value of fuel – 45000 kJ/kg. Mechanical Efficiency = 88% Determine the (a) BHP, (b) IHP, (c) Indicated themal efficiency, and (d) Brake thermal efficiency.
The following particulars refer to a 4-cylinder, 4-stroke petrol engine; Bore= 65 mm, Stroke length = 95 mm, Torque developed = 64 Nm when engine turns 3000 rev/min, Clearance volume = 63 cm3 for each cylinder, Relative efficiency = 0.5 and Calorific value of petrol = 42000 kj/kg. Make calculations for brake mean effective pressure and the fuel consumption in kg/hr.
Q9: In a test on a two- stroke, heavy oil, marine engine, the following observations were made, Oil consumption, 4.05 kg; Calorific value of oil, 43000 kj/kg; het brake load 579N; Mean brake diameter, 1 m; mean effective pressure 275 kN/ m2; Cylinder diameter 0.20m; stroke, 0.250m; speed, 360 rpm. Icalculate o @ the mechanical efficiency the indicated thermal efficiency O Ihe brake thermal efficiency and The quantity of jacket water required per minute if 30% of the energy supplied by the fuel is absorbed by this waterPermissible rise in temperature is 20k and specific heat capacity of water=4.1868
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A single cylinder, 4 stroke diesel engine gives the following test results: Load on brake drum 205 N, Radius of brake drum 50 cm, speed 1000 rpm, friction power 1.8 kW, total fuel consumption 1.77 kg/h, calorific value of fuel 42000 kJ/kg. Find the brake thermal efficiency, mechanical efficiency and indicated thermal efficiency. If the brake mean effective pressure is 4.5 bar find the swept volume.
3. A 4-stroke, 8-cylinder, petrol engine, has the following parameters at sea level; fue consumption = 0.75 Itr/min, engine speed = 50 r.p.s., Ap = 60 mm Hg, venturi diameter = 4 cm, atmospheric pressure = 1.03 kg/cm', C, 0.8, air and fuel densities are 1.15 kg/m' and 700 kg/m' respectively. Calculate: AF when the temperature decreases by 10%.
Q1. During a test on a two stroke diesel engine on full load the following observations were recorded: Speed= 350 rpm Net brake load= 590 N Mean effective pressure= 2.8 bar Fuel consumption=4.3 kg/h Jacket cooling water= 500 kg/h Temperature of jacket water at inlet and outlet= 25°C and 509C respectively Air used per kg of fuel= 33kg Temperature of air in test room= 25°C Temperature of exhaust gases= 400°C Cylinder diameter= 220 mm Stroke length= 280 mm Effective brake diameter= 1 m Calorific value= 43900 KI/kg Proportion of hydrogen in fuel= 15% Mean specific heat of dry exhaust gases= 1.0 KI/kg K Specific heat of steam= 2.09 KJ/kg K Calculate: (1) indicated power (2) brake power (3) draw up heat balance sheet on minute basis.
2- Diesel engine, six cylinders is tested at 4750 rpm, the pressure and temperature of the air entering the engine are 1.2bar, and 25 if the bore of cylinder is 80 mm and stroke 120 mm ,take air fuel ratio is 12:1, the specific fuel consumption is 0.52kg/kWh, and the brake power is equal 94 kW find the following: fuel consumption m'f = kg/ sec the air consumption engine capacity.: the flow rate of air intake to cylinder the Volumetric efficiency
Q1. During a test on a two stroke diesel engine on full load the following observations were recorded: Speed= 350 rpm Net brake load= 590 N Mean effective pressure= 2.8 bar Fuel consumption=4.3 kg/h_ Jacket cooling water= 500 kg/h Temperature of jacket water at inlet and outlet=25°C and Soyc respectively Air used per kg of fuel= 33kg Temperature of air in test room= 25°C Temperature of exhaust gases= 400°c Cylinder diameter= 220 mm In solve to find mass of steam in exhaust gases m=(4.3/3600) *0.15 *9 Stroke length= 280 mm want clarification of the value 9 bleas Effective brake diameter= 1 m Calorific value= 43900 KJ/kg Proportion of hydrogen in fuel= 15% Mean specific heat of dry exhaust gases= 1.0 KI/kg K Specific heat of steam= 2.09 KJ/kg K Calculate: (1) indicated power (2) brake power (3) draw up heat balance sheel on minute basis.
A four-stroke, four-cylinder diesel engine running at 2000 rpm develops 60 kW. Brake thermal efficiency is 30% and calorific value of fuel (CV) is 42MJ / k_{g} . Engine has a bore of 120 mm and stroke of 100 mm. Take p_{a} = 1.15 kg / (m ^ 3) air-fuel ratio- 15:1 and eta_{m} = .8 Calculate (i) furl consumption kg/s) : (ii) air consumption (m^ 3/s );(ii) indicated thermal efficiency; (iv) volumetric efficiency: (v) brake mean effective pressure and (vi) mean piston speed.
The following particulars refer to a 4 cylinder, 4 stroke petrol engine; Bore = 65mm Stroke length = 95 mm; Toraue = 64 Nm @ 3000 RPM; Clearance volume = 63 cm3 for each cylinder; Relative efficiency = 0.5 Calorific value of Fuel = 42 MJ/kg. Calculate: (i) Brake mean effective pressure (ii) Fuel consumption in kg/hr.