???????: Show full caption A torque of 200 ft-lb is developed by a diesel engine whenrunning at 1200 rpm and using 20lbs of fuel per hour. Theheating value of the fuel is 19,000 BTU/lb. The engine is of4-stroke cycle and has 4 cylinders. The bore equals tostroke. The engine takes in 25lbs of air per lb of fuel. Thevolumetric efficiency is 80%, T-60°C. Calculate the brakethermal efficiency and the bore in inches. Assume that it isoperated at standard condition.

To determine:1) Bore diameter.2) brake thermal efficiency.Given:torque developed is the speed of the…

Answered: A torque of 200 ft-lb is developed by a…

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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1 MPa and 350C, the compression ration is eight heat supplied is 2100 KJ/Kg calculate the maximum pressure and temperature of the cycle, cycle efficiency and mean effective pressure
An ideal Brayton eycle has a net work outnut of 150 Jkg and a backwork rato o 0.4. Now, considering that both the turbine and the compressor have an sentro efficiency of 85%, calculate a. The work of each of the turbine and compressor for the ideal case D. The work of cach of the turbine and compressor for the non-ideal case. c. the net work output of the actual cycle
A 4 cylinder 4-stroke S.I square engine has a compression ratio of (8), and bore (100 mm). The volumetric efficiency of each cylinder is (75%). The engine operates at a speed of (4800 rpm) with air to fuel ratio of (15).given the calorific value of fuel is (42 MJ/kg), atmospheric air density is (1.12 kg/ m3), mean pressure in the cylinder (10 bar) and mechanical eff (80%). Determine indicated thermal eff and brake power. [answer: 42.5% , 100.48 kw] Jo 10:42
b- A 4-stroke diesel engine is to be designed to operate with the following characteristics at sea level, where the ambient conditions are 103 kPa and 10°C. b.p=260 kW, s.f.c=0.244 kg/kW.h, Speed = 1500 rpm, volumetric efficiency = 0.78, A/F ratio = 17:1. Calculate the required engine capacity and the anticipated bmep. The engine is fitted with a supercharger so that it may be operated at an altitude of 2700 m where the atmospheric pressure is 73 kPa. The power taken by the supercharger is 8% of the total power produced by the engine and the temperature of the air leaving the supercharger is 32°C. The A/F ratio and thermal efficiency remain the same, so as the nv Calculate the increase of pressure at the supercharger to maintain the same net power output. Take R = 0.287 kJ/kg.K.
An engine operates at 1,942 RPM with a compression ratio of 21.3:1, a crank offset of 9cm, and a rod length of 50cm. Combustion ends at 32° ATDC. Find the cycle cut-off ratio.
An engine operating on the air standard Diesel cycle has a compression ratio of 17/1 and the maximum and minimum cycle temperatures are 16200C and 48oC respectively. If the maximum cycle pressure is 55 bar, calculate the temp. and press. at the end of the expansion stroke the volume ratio of combustion the thermal efficiency of the cycle and mean effective pressure
An ideal diesel cycle has a compression ratio of 30 and a shear ratio of 2. If this cycle produces 300 hp, what is the maximum cycle temperature and heat input. Speed 1500 rpm, atmospheric conditions 100 kPa, 300 K.
A compression-ignition engine with compression ratio of 14 is being designed. Pressureand temperature at the bottom dead centre are 1.3 bar and 400K. The engine operatesaccording to the standard Diesel cycle. Assume polytrophic index to be 1.33. Computepressure and temperature at the top dead centre
3. A 2-stroke, double-acting, 2L engine is run at speed of 4200 rpm. The volume displacement is, a 0.25 b 0.28 c 0.35 d 0.42
A spark ignition engine based on Otto cycle has a working temperature range of 25.0 °C and 700.0 °C and its output power is 200 kW. The efficiency of this engine is found to be 56.5%. a. Calculate the compression ratio (r). b. Calculate the input power. c. Calculate the mass flow rate (kg/sec) of air. d. Consider reducing the air emission by 10% while keeping the same materials for key components of the engine, maximum engine temperature of 700.0 °C and input power obtained from part (b). Propose modification and analysis the possible impact on other physical properties. [for air cp = 1.003; c, = 0.717 J/kg-K]
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A power generator with two-cylinder, four-stroke gas engine has a bore of480 mm and a stroke of 585 mm. At 300 rev/min the torque developed is10 kNm. The generator is supplied with a mixture of gas and air in theproportion of 1 to 8 by volume. The estimated volumetric efficiency is 80% and the net calorific values of the fuel is 48.6 MJ/m3. Calculate: 1. the swept volume in m3/min, 2. the volume of mixture induced in m3/min 3. the gas flow to engine m3/min4. the energy supplied by gas5. the brake thermal efficiency

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