Q₁) In an ideal otto cycle engine, the temperatureand Pressure at the beginning of Compression are 43 C100 kpa respectively and the temperature at the endof adiabatic Compression is 323%. if the temperature.at the end of Gnstant Volume heat addition is 1500°Ccalculate: (a) the Compression ratio, (b) the air-standard efficiency, (c) the temperature and pressureat the end of adiabatic expansion. Assume Yas 1.4 Por2

In this problem, we will determine the Otto cycle compression ratio, air standard efficiency, and…

Answered: Q₁) In an ideal otto cycle engine, the…

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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A diesel engine takes in air at 0.95 bar and 21 o C and operates on the dual combustioncycle. Calculate the air standard thermal efficiency if the compression ratio is 19/1 andthe maximum cycle pressure is 68 bar. Assume that 40% of the total heat supplied isadded at constant volume and the remaining 60% at constant pressure.
3. An ideal air-powered Otto cycle has a compression ratio of 8. Lowest and highest of the cycle temperatures are 300 K and 1340 K, respectively. Taking into account the variation of specific heats with temperature, a) The heat entering the cycle, b) The thermal efficiency of the cycle, c) Calculate the thermal efficiency of the Carnot cycle operating between the same temperature limits.
In a standard Diesel cycle, compression starts at the final ambient conditions of the addition of heat, conditions are 5.0MPA for pressure and 1750 ° C for temperature. Using with specific heats evaluated at 300K. Determine: a) The mean effective pressure, in kPa. b) The thermal efficiency of the cycle. c) The cut-off ratio. d) The compression ratio.
A 2-stroke engine that works based on the diesel cycle admits air conditioning 100kPa and 280K. The compression ratio is 20:1 and the fuel-air ratio is 7.5x10^-3 kg fuel/kg air. If the calorific value of the fuel is 42750 KJ/kg, the displacement volume is 0.8L (with a diameter equal to 1.1 the stroke of the piston) The engine is 6-cylinder and rotates at 3600 rpm, use air tables and tables of combustion products with 200% excess air to determine: a) The cycle in a pressure-volume diagram with its corresponding numbering. b) The maximum temperature of the cycle, in K c) The cutoff ratio d) The temperature of the combustion gases at the engine outlet, in K e) The cooling water mass flow, in kg/s f) The motor power, in kW g) The mean effective pressure, in kPa h) Thermal efficiency, in %
For an ideal Otto engine operating on air, the temperature at the end of isentropic compression is 452 and at the end of expansion is 1347 ° C. The compression ratio is 7.5. Using gas tables find the cycle work and (Ans. 979.4 kJ / kg: 47.69 efficiency.
B1
An ideal otto engine , operating on the hot air standard with k= 1.3, has a compression ratio of 6.At the beginning of the compression the volume is 0.1982 cubic meter , the pressure is 15 psia and the temperature is 560 R .During the constant volume heating , 259 Btu are added per cycle . Find (a) c,(b) t3 ,(c) p3 ,(d) e, and (e) pm?
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An ideal Diesel engine uses air initially at 20°C and 90 kPa at the beginning of the compression process. If the compression ratio is 15 and the maximum temperature in the cycle is 2000ºC, determine the following: .net work (kJ) produced a. 812 b. 930 c. 1010 d. 1414 mean effective pressure (kPa) a. 812 b. 930 cut-off ratio a. 1.3 b. 2.8 c. 1010 d. 1414 c. 2.6 d. 5.7

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