Q In a test on a two.. strok, heavy oil, marine engine, the following observations weremade: Oil consumption, 4.05 kg/h; Calorific value of oil, 43000kj/kg; het brakeload 579N; Mean brake diameter, 1m; mean effective pressure 275 kN/m²; cylinder diameter0.20m; stroke, 0.250m; speed, 360 rpm.Calculatethe mechanical efficiency the indicated thermal efficiency YThe brake thermal efficiency and the quantity of jacket water required perمسموح بهامتصتminute if 30% of the energy supplied by the fuel is absorbed by this water.Permissible rise in temperature is 20k and specific heat capacity of water-4.1868 kjAnswers [84.2%, 26-8%, 22.6%, 8.33 kg/min]kg.kعماد داود عبود

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Answered: Q In a test on a two.. strok, heavy…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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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.
Engine Type Four cylinder Four stroke Diesel engine, Bore: 0.073m, Stroke: 0.0889m Capacity: 1489cc, Power: 36 H.P. at 4000 rpm, Torque : 8.5 kg.m at 2250 rpm and Compression Ratio :17.3:1 Explain how to measure the :- (i) Fuel consumption. (ii) (iii) RPM, power output etc. (iv) Study of various components of diesel engine. Manometer readings for air flow.
The following data were obtained during a test of six cylinder otto cycle engine. Speed 2000 rpm, bore 3.5 in stroke 3.75 in, specific fuel consumption base on brake hp.66 lbs. / bhp-hr, brake arm 1.05 ft. HHV of fuel 20000 Btu/lb, Brake Torque 133 ft-lb, friction torque 40 ft-lb room temperature 90 F. barometric pressure 14.7 psia Find:a.) BHP=b.) BMEP=c.) IMEP=d.) IHP=e.) BRAKE THERMAL EFFICIENCY=f.) INDICATED THERMAL 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 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.
Q3: You are designing a four-stroke cycle diesel engine to provide a brake power of 300 kW naturally aspirated at its maximum rated speed. Based on typical values for bmep and maximum mean piston speed, estimate the required engine displacement, bore and stroke for sensible cylinder geometry, also find the number of engine cylinders. What is the maximum rated engine speed (rev/min) for your design? What would be the brake torque (N-m) and the fuel flow rate (g/hr) at this maximum speed? Assume a maximum mean piston speed of 12 m/s is typical of good engine designs.
confused with answer 60% and 69% Please do it correctly or skip if you are unsure. [within 30minutes]
A 1500cm³, four-stroke, four cylinder CI engine operating at 3000rpm produces 48kW of brake power. Volumetric efficiency is 0.92 and air-fuel ratio AF=21:1 Calculate: (Show your solution) a. Rate of air flow into the engine (kg/sec) b. Break specific fuel consumption (gm/kW-hr) c. Break output per displacement (kW/I)
solve the following explaining the steps please
During a 60–minute trial of a single cylinder four-stroke oil engine, the following observations were made. Engine dimension = 0.3 m bore X 0.45 m stroke, Fuel consumption 11.4 kg, Calorific value of fuel = 40 MJ/kg, IMEP = 6 bar, Net load on brakes = 1652 N , Speed = 300 rpm, Brake drum diameter = 1.8 m, Brake rope diameter = 20 mm, Quantity of jacket cooling water = 600 kg, Temperature rise of cooling water = 55°C, Quantity of air as measured = 250 kg, Exhaust gas temperature = 420°C, Specific heat of exhaust gas = 1.0 kJ/kg K, Ambient temperature = 20°C. Draw up an energy balance sheet of the engine and calculate for: Qw = energy loss due to cooling water, in kJQe = energy loss due to exhaust gas, in kJQu = unaccounted energy loss due to convection, radiation, etc. , in kJ
please explain how to solve this
Q20 An engine using fuel of calorific value 42000 kj/kg has abrake thermal efficiency of 30%. Find its brake specific fuel consumption in gram Answer [ 285.71 gm/kw_hr] 9.1 b-p-hr

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