Mechanical System Design Home Work 2 PISTON DESIGN Q2: Design a cast iron trunk type piston for a single acting four stroke engine developing 75 kW per cylinder when running at 600 r.p.m. The other avialable data is as follows: Maximum gas pressure 4.8 N/mm; Indicated mean effective pressure = 0.65 N/mm'; Mechanical efficiency 95%; Radius of crank = 110 mm; Fuel consumption = 0.3 kg/BP/hr; Calorific value of fuel (higher) = 44 x 103KJ/kg; Difference of temperatures at the centre and edges of the piston head = 200°C; Allowable stress for the material of the piston = 33.5 MPa; Allowable stress for the material of the piston rings and gudgeon pin = 80 MPa; Allowable bearing pressure on the piston barrel = 0.4 N/mm' and allowable bearing pressure on the gudgeon pin= 17 N/mm.

Mechanical System Design Home Work 2 PISTON DESIGN Q2: Design a cast iron trunk type piston for a single acting four stroke engine developing 75 kW per cylinder when running at 600 r.p.m. The other avialable data is as follows: Maximum gas pressure 4.8 N/mm; Indicated mean effective pressure = 0.65 N/mm'; Mechanical efficiency 95%; Radius of crank = 110 mm; Fuel consumption = 0.3 kg/BP/hr; Calorific value of fuel (higher) = 44 x 103KJ/kg; Difference of temperatures at the centre and edges of the piston head = 200°C; Allowable stress for the material of the piston = 33.5 MPa; Allowable stress for the material of the piston rings and gudgeon pin = 80 MPa; Allowable bearing pressure on the piston barrel = 0.4 N/mm' and allowable bearing pressure on the gudgeon pin= 17 N/mm.

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

2. Design a cast iron trunk type piston for a single acting four stroke engine developing 75 kW per cylinder when running at 600 r.p.m. The other avialable data is as follows: Maximum gas pressure = 4.8 N/mm2; Indicated mean effective pressure = 0.65 N/mm?; Mechanical efficiency = 95%; Radius of crank = 110 mm; Fuel consumption = 0.3 kg/BP/hr; Calorific value of fuel (higher) = 44 x 10°KJ/kg; Difference of temperatures at the centre and edges of the piston head = 200°C; Allowable stress for the material of the piston = 33.5 MPa; Allowable stress for the material of the piston rings and gudgeon pin = 80 MPa; Allowable bearing pressure on the piston barrel = 0.4 N/mm2 and allowable bearing pressure on the gudgeon pin = 17 N/mm2.
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 Volumetric efficiency
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%.
02 2. A ix-cylinder, four-stroke cycle, marine oil engine-has cylinder dia méters of 610 mm and a piston troke of 1 25S0 mm. When the engine speod s 2 rev/s it uses 340 kg of fuel oil of calorific value 44 206-Lkg-in one hour. The cooling water amounts to 19200 kg/h, eniering at 15 C and leaving at 63 C The torque transitted at the engine coupling is 108 kN m and the indicaled mean effective pressure is 775 kN/m Determine: ta) the indicated power. ib) the brake power. (c) the percentage of the enerEY Hipplied kg ef fuel lost to the cooling water idi the brake thermal efficiency. jci the brake Hcan eflective pressure: i0 the mechanical efficiency. (g) the brake apecific fuel conumption.
A diesel engine working with cylinder bore of 25 cm and stroke length of 200 mm. the clearance gap beteen TDC and cylinder head is measured as 10 mm. then the compression ratio of the engine will be O b. 22 Oc.21 O d. 200
1. An 11.1 liter, 6 cylinder, 4 stroke engine has a 120 mm bore and 125 mm stroke. If its compressions ratio is 16, what is the clearance volume? What is the engine displacement per minute if it runs at 2,000 rpm? If biogas, with an energy content of 4,500 Kcal/m3 will be fueled into the engine, what would be its power output (in KW) considering a 10% brake thermal efficiency?
1- A four-cylinder, two stroke cycle diesel engine with (10.9 cm) bore and (12.6 cm) stroke produces (88 kW) of brake power at (2000 RPM). Compression ratio is (18:1). Determine: (a) Engine displacement. Ans.: (4700.6 cm³). (b) Brake mean effective pressure. Ans.: (561.7 kPa).
(c) A cast iron piston for a single acting four stroke engine has the following specifications: Cylinder bore 100mm Stroke=125mm Maximum gas pressure = 5 N/mm² Indicated mean effective pressure = 0.75 N/mm² Mechanical Efficiency = 80% Fuel Consumption = 0.15kg per brake power per hour Higher Calorific value of fuel = 42X10³ kJ/kg Speed=2000 r.p.m. Stating any assumptions made, determine the thickness of the piston head Piston Data: Thermal conductivity of cast iron: 46.6W/m/°C Temperature difference between the piston centre and edge: 220°C. Permissible Stress for cast iron: 38N/mm² Take C=0.05.
Q3. Four liter four-stroke Otto cycle. V8 automobile engine has run for several years 220000 km at an average speed of 80 km/hr and an engine speed of 1800 rpm. Calculate for the entire engine: a) How many the pistons have passed the BDC? b) How many spark plug firings have occurred?
The following data refer to a 12-cylinder, single-acting, two-stroke marine diesel engine:Speed: 150 rpmCylinder diameter: 0.8mStroke of piston: 1.2 mArea of indicator diagram: 5.5x 10-4 m2Length of diagram: 0.06 mSpring value: 147 MPa per mFind the net rate of work transfer from the gas to the piston in kW.
For a sprak ignition engine the following readings were observed. cylinder diameter 10 cm, stroke length 10 cm and clearance gap between TDC and cylinder head is 10 mm. for such engine the compression ratio will be а. 11 O b. 10 c. 100 d. 110
5. An engine trom a quary vehicle used in the Buid a Beach program of DEMR has a power requirement of 560 kw. Per hour of its operation. it ejects 234 MJ into its suroundings at 50 °C. If it behaves like a Carnot engine, answer the questions below. a. How much work (MJ) s done by the engine per hour? b. What is the efficiency (%) of the engine? c. What is the temperature ("C) of the hot reservoir?