Q10 An air standard Otto cycle has a compression ratio of (8), at the start of thecompression process, the temperature is (300K), and the pressure is (100KP). If themaximum temperature is (1200K), determine(a) The heat supplied per Kg of air.(b) The net work done per Kg of air.(c) Thermal efficiency of the cycle(d) Mean effective pressure.Answer: 366.74 Kj/KgAnswer: 206.97 Kj/KgAnswer: 56.4 %Answer: 274.5 KN/m²JSPعماد داود عبود

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Answered: Q10 An air standard Otto cycle has a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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An ideal Brayton cycle has a pressure ratio of 8. At the beginning of the compression process, air is at 300 K. If Tmax in the cycle is 1200 K, determine the temperature of air, in K, at the beginning of heat exchange processes.determine the back-work ratio,determine the thermal efficiency of the cycle (Apply air-standard assumptions: variable specific heat)
An ideal Brayton cycle has a pressure ratio of 8. At the beginning of the compression process, air is at 300 K. If Tmax in the cycle is 1200 K, determine the temperature of air, in K, at the beginning of heat exchange processes. (Apply air-standard assumptions: variable specific heat)
In a C.I. engine working on the dual combustion cycle the compression ratio is 12.5:1. Air at 101.3kPa and 35°C is compressed adiabatically. Fuel is then added until the pressure reaches 4000kPa, then at constant pressure to a temperature of 1425°C. After adiabatic expansion to the initial volume exhaust takes place. Calculate: (a). work done/kg air (b). thermal efficiency
In an air-standard Carnot cycle heat is transferred to the working fluid at 1100 K, and heat is rejected at 300 K . The heat transfer to the working fluid is 100 kj /kg. The minimum pressure in the cycle is 0.1 MPa. Assuming constant specific heat of air, determine the efficincy of the cycle the pressure and specific volumes at each state.and the mean offective pressure Pm the compresion ratio ,the cut off ratio ,the expansion ratio finally calculate the work and heat for each process then determain the net heat and net work .disscuss the result
In an air standard Otto cycle, the clearance volume is 12 % of the displacement volume. What is the thermal efficiency?
Q4 An air standard Otto cycle has a compression ratio of (8),at the start of compression stroke, the temperature is (300K) and the pressure is (100KPa), if the maximum pressure in the cycle is (3MPa) determine (a) the heat input per Kg. (b) The cycle efficiency. (c) The mean effective pressure.
A compression ignition engine has a compression ratio of 16:1, and at the beginning of the isentropic compression, the temperature is 15o C and the pressure is 0.1 MPa. Heat is added until the temperature at the end of the constant pressure process is 1480o C. a.)Determine the cycle efficiency (in %) b.)Calculate for the mean effective pressure (in kPa) c.) Determine the heat added per kg of air.
3. Draw the graph of Otto air standard cycle and prove that the thermal efficiency is equal to:notto = 1-1/r^y-1 for the range of r=8-12, y=1.5. where r is the compression ratio and y is the specific heat ratio.
2-Air enters the compressor of a cold-air-standard Brayton cycle with regeneration, intercooling and reheating at 100kPa, 300K, with a mass flow rate of 6kg/s. The compressor pressure ratio are the same across each compressor stage. Overall compression ratio of the system is 10. The intercooler and reheater both operate at the same pressure. The temperature at the inlet to the second compressor stage is 300K. The temperature at the inlet of both turbine is 1400K. The compressor and turbine stages each have isentropic efficiencies of 80% and the regenerator effectiveness is 80%. For k=1.4, calculate: A) the thermal efficiency of the cycle, the back work ratioand the net power developed, in kW.
Answer carefully please. Step by step solution. Determine: (a) the compression ratio. (b) the cutoff ratio. (c) the percent thermal efficiency of the cycle. (d) the mean effective pressure, in kPa.
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