9 A full load test on a two-stroke engine yielded the following results:speed 440 rpm; brake load 50 kg; imep 3 bar; fuel consumption 5.4kg/h; rise in jacket water temperature 36 °C; jacket water flow 440kg/h; air-fuel ratio by mass 30; temperature of exhaust gas 350 °C;temperature of the test room 17 °C; baromet ric pressure 76 cm of Hg:cylinder diameter 22 cm; stroke 25 cm: brake diameter 1.2 m; calorificvalue of fuel is 43 M.J/kg; proportion of hydrogen by mass in the fuel15%: R0.287 k.J/kg of mean specific heat of dry exhaust gases1 kJ /kg K; specific heat of dry steam 2 kJ/kg K. Assume enthalpy ofsuper heated steam to be 3180 k.J/kg. Determine.(i) the indicated thermal efficiency(ii) the specific fuel consumption in g/kW h(iii) volumetric efficiency based on atmospheric conditionsDraw up a heat balance for the test on the percentage basis indicatingthe balance.the content of cach item

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Answered: 9 A full load test on a two-stroke…

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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During a test on a 5-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 271 mm and 309 mm respectively, running at 507 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.814 m) 221.2 kg Indicated mean effective pressure 321 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the indicator power to 2 decimal places.
As a mechanical engineer, you were asked by your supervisor to monitor the operation of 4-stroke engine; as a result you got the following readings: > Imep = 780 kN/ m2 > Engine speed = 800 rpm > Brake Power 30 kW %3D %3D > nm = 85 % > B/S 0.7 You noticed also, that the inlet valve opens 10° before TDC and closes40° after BDC and it takes 0.0035 second after ignition for the charge to gain maximum pressure. Depending on the above readings, find the following engine parameters: a. The crank angle when the spark occursfor the maximum pressure to be at TDC b. The time period in second of inlet valve opening during one cycle c. The diameter of the engine d. The average piston speed 1 Upload file
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During a test on a five-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 260 mm and 305 mm respectively, running at 503 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.825 m) 221.9 kg Indicated mean effective pressure 400 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the brake power .
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