(C) The following observations were recorded during a trial on a 4-stroke diesel engine : Power absorbed by non-firing engine when driven by an electric motor = engine = 1750 rpm, brake torque 42000 kJ/kg, air supplied temperature of cooling water = temperature = 20.8°C, specific heat of water = 4.19 kJ/kg K, and specific heat of exhaust gase 1.25 kJ/kg K. Determine : a) B.P, b) Mechanical efficiency, c) BSFC, and d) Draw up hea balance sheet on kW basis. 10 kW, speed of the 327.4 Nm, fuel used = 15 kg/hr, calorific value of fuel = = 4.75 kg/min, cooling water circulated 65.8°C, temperature of exhaust gases 16 kg/min, outle 400°C, room !! %3D

(C) The following observations were recorded during a trial on a 4-stroke diesel engine : Power absorbed by non-firing engine when driven by an electric motor = engine = 1750 rpm, brake torque 42000 kJ/kg, air supplied temperature of cooling water = temperature = 20.8°C, specific heat of water = 4.19 kJ/kg K, and specific heat of exhaust gase 1.25 kJ/kg K. Determine : a) B.P, b) Mechanical efficiency, c) BSFC, and d) Draw up hea balance sheet on kW basis. 10 kW, speed of the 327.4 Nm, fuel used = 15 kg/hr, calorific value of fuel = = 4.75 kg/min, cooling water circulated 65.8°C, temperature of exhaust gases 16 kg/min, outle 400°C, room !! %3D

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

See similar textbooks

Similar questions

During testing of single cylinder two-stroke petrol engine following data were obtained. Brake torque = 640 Nm, cylinder diameter 21 cm, speed 350 rpm, stroke length = 28 cm, mean effective pressure = 5.6 bar, oil consumption = 8.16 kg/h, calorific value of the fuel = 42,705 kj/kg. Determine: Srake thermal efficiency
Consider a Brayton cycle shown to the right. Insert a correct sign (>, <, =) for comparison of thermal efficiencies between two cycles: a. 1234 ____ 1’2’34 b. 1234 ____ 123’4’ c. 1’2’3’4’ _____ 1234 Please Explain your reasoning.
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=
An experiment is done on a single cylinder engine whose crankshaft makes two complete revolutions in every cycle and the observation data were recorded for 1 hour duration: Crankshaft revolutions =70000, Indicated mean effective pressure=38*0.7 bar, Engine swept volume=1.1 litres, Brake load on dynamometer=6kg, Brake drum diameter=37*0.8 cm, Fuel used=Diesel, Calorific value of fuel=41*0.75 MJ/kg. What percentage of indicated power is available at the engine output shaft? What will be the Indicated Specific Fuel Consumption (ISFC) in kg/kWh, if the conversion efficiency of heat released in the cylinder to indicated power is [38*0.9] %. If the conversion efficiency is less than or equal to 35%, then use [71]*0.5 % for finding conversion efficiency.
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 .
Energy balance results (in kW) obtained for the same medium speed single cylinder diesel engine are reported in the following table. For case 1, if the coolant temperature is 105 °C at the outlet of the engine and the volumetric flow rate is 0.22*10-3 m3/s, the temperature of the coolant at the inlet is (in °C): (The coolant is considered water with a density 999 kg/m3 and a specific heat 4.2 k/kg.K). Case N (rpm) bmep (bar) W. O ambient Q ahast shaft 2.2 4.2 19.1 60.3 9.90 3.52 1 500 7.1 24.5 23.8 500 6.1 3.6 5.2 400 3.50 4.9 4.1 1.4 Select one: O a. 142.1 O b. 112.7 O c. 97.31 O d. 87.2 O e. 370.31
10. Use the following information for a dual cycle internal combustion engine andfind a) the state parameters (P & T) at stages 1 through 5 shown in the Problem 9figure, b) the expansion work, c) the compression work, d) the net cycle work, andthe cycle efficiency. Data: P1 = 1 bar, T1 = 300 K, rV = 12.7, rP = P3/P2= 1.4, andrc = 1.6, the working fluid is air (cv = 0.72 kJ/kg·C, cp = 1.01 kJ/kg C, R = 287J/kg·C, γ = 1.4). [Ans.: P2 = 35 bar, P3 = 49 bar, P4 = 49 bar, P5 = 2.7 bar, T2 =555 C, T3 = 887 C, T4 = 1585 C, T5 = 535 C)}.
A diesel engine is a type of internal combustion engine that uses compression ignitionto turn energy in diesel fuel to rotary mechanical energy. A four-stroke (i = 0.5 for fourstroke engine, stroke = 150 mm and revolution = 2100 min−1) diesel engine with 6cylinders and an effective specific fuel consumption of 0.23 kg kW−1h−1 has aneffective and indicated mean pressure of 9.2 bar and 6.8 bar, respectively, and acompression ratio of 17. The ambient temperature and pressure of the diesel engineis 30 ℃ and 1.017 bar, respectively, and the temperature of the exhaust gas is 650 ℃.The clearance volume of the cylinder is 107.8 cm3, and the delivery ratio is 0.83. Themass flow rate of fuel for the diesel engine is 5.95 g s−1. Taking the lower heating valueof diesel fuel and specific heat of flue gas to be 42500 kJ kg−1 and 1.08 kJ kg−1K−1,respectively, answer the following: a. Calculate the mass flow rate of air inducted to the engine.b. Based on your answers above, determine the ratios of…
Q#01 An eight-cylinder, four-stroke engine of 9 cm bore and 8 cm stroke with a compressionratio of 7 is tested at 4500 rev/min on a dynamometer which has 54 cm arm. During a 10minutes test the dynamometer scale beam reading was 42 kg and the engine consumed4.4 kg of gasoline having a calorific value of 44000 kJ/kg. Air at 27C and 1 bar wassupplied to the carburettor at the rate of 6 kg/min. Take R for air = 287 kJ/(kg·K). Find:(1) the brake power delivered (bp),(2) the brake mean effective pressure (bmep),(3) the brake specific fuel consumption (bsfc),(4) the brake specific air consumption (bsac),(5) the brake thermal efficiency (b, th),(6) the volumetric efficiency (vol), and(7) the air-fuel ratio (A/F) on mass basis.Draw the simplified schematic diagram of the plant showing all the necessary data displayed on it
Determine nozzle angle, blade angles at inlet and exit for a single stage impulse steam turbine developing 132 kW, speed of 3340 rpm, mean rotor diameter of 1 m, steam flow rate of 2 kg/s, blade velocity coefficient of 0.9, steam leaving nozzle at 400 m/s and steam discharges axially from turbine.
The following are reasons why we use assumptions to represent reciprocating engines as closed system cycles, EXCEPT: a.All statementds are valid b.Reciprocating engines have equivalent thermal efficiencies as their corresponding cycles c.The shape and behavior of reciprocating engines are too complex d.The working fluid for reciprocating engines is an air-fuel mixture, which could be difficult to model
A 4-stroke, 12 square-cylinder piston rotary engine is required for the propulsion of an aircraft cruising at speed of 100 m/s, at an altitude where the ambient conditions are 240 K and 46.6 kPa. The following data can be used: Thrust required5 kN propeller efficiency0.85 Engine brake thermal efficiency 0.35 fuel air ratio0.04 Engine rpm4000 Volumetric efficiency0.871. Calculate the engine brake power, bsfc, displacement volume and cylinder dimensions. 2. Calculate the fuel required to cruise from Jeddah to Dammam (1370 km). kindly, solve all requireds by clear handwritten