Q13: In an ideal Otto cycle the air at the beginning of isentropic compression is at(1 bar) and (15 °C). The ratio of compression is (8). If the heat added during theconstant volume process is (1050 KJ/Kg), determine (a) the maximum temperature inthe cycle. (b) the air standard efficiency. (c) the work done per Kg of air. (d) the heatrejected. Take Cv. 0.714 Kj/Kg.K and y = 1.4.Answers: (a) T3-2132.23K (b) 56.47 % (c) 592.935 Kj/Kg (d) 457 KJ/Kg

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Answered: Q13: In an ideal Otto cycle the air at…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Consider an air-standard Otto cycle. At the beginning of the compression process, the pressure and temperature are 100 kPa and 300 K. The displacement volume is 2 liters, compression ratio is 10 and the pressure at the end of the combustion is 4 times the pressure at the end of the compression.Use cold-air standard calculations and determine: a) the pressure, temperature and volume at each state and fill in the below table: b) the net work per cycle, in kJ c) the thermal efficiency of the cycle.
Consider a modification of the cold air-standard Otto cycle in which the isentropic compression and expansion processes are each replaced with polytropic processes having n = 1.3. The compression ratio is 12 for the modified cycle. At the beginning of compression, p1 = 1 bar and T1 = 300 K and V1 = 2270 cm3. The maximum temperature during the cycle is 2000 K. Determine the work output in kJ, for the modified cycle. A) 2.28 B) 1.89 C) 2.22 D) 1.99
! Required information Problem 09.034 - Ideal Otto Cycle with Variable Specific Heats - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kPa and 27°C, and 760 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Take into account the variation of specific heats with temperature. The gas constant of air is R = 0.287 kJ/kg-K. Problem 09.034.a - State After Heat Addition in Variable Heat Capacity Ideal Otto Cycle Determine the pressure and temperature at the end of the heat-addition process. (You must provide an answer before moving on to the next part.) The pressure at the end of the heat-addition process is 3915.8 kPa. The temperature at the end of the heat-addition process is 1647.7 K.
Consider a modification of the cold air-standard Otto cycle in which the isentropic compression and expansion processes are each replaced with polytropic processes having n = 1.3. The compression ratio is 12 for the modified cycle. At the beginning of compression, p1 = 1 bar and T1 = 300 K and V1 = 2270 cm3. The maximum temperature during the cycle is 2000 K. Determine the work input in kJ, for the modified cycle. A) 0.630 (B) 0.566 C) 0.590 D) 0.531
The intake air to an ideal Otto cycle has a maximum volume of 0.004 m3 at 27 o C and 101 kPa. If the displacement volume is 0.0035 m3 and the heat rejected from the cycle is 605 J, run an analysis to determine the following; 1- All volumes, pressures, and temperatures for all states. 2- The total heat added to the cycle, Qin 3- The total heat rejected from the cycle, Qrej 4- The total work done by the cycle, Wnet 5- The thermal efficiency of the cycle, ηth
What is/are the thermodynamics cycles involved in a vapor compression cycle? Describe each cycle. And give some example in each.
An air-standard Otto Cycle with a compression ratio of 9.0 has air entering at 101 kPa and 27 deg C. There is an input of 1 800 kJ/kg of heat during the heat addition process. Determine maximum temperature in Fahrenheit, thermal efficiency and net work (k]/kg).
An air standard Diesel cycle has 100 kPa of pressure and 300 K of temperature at the beginning of the compression process. At the end of heat addition process, pressure is 4.5 MPa. At the cycle, cutoff ratio is 1.9 and at the end of expansion process, the pressure is 220 kPa. Determine the work output (wnet) in kJ/kg applying the cold-air- standard assumptions. (for air cy=0.718 kJ/kg.K, cp=1.005 kJ/kg.K, k=1.4)
Consider an air-standard Otto cycle that has a compression ratio of 8 and a heat addition of 1330 kJ/kg. If the pressure and temperature at the beginning of the compression process are 0.1 MPa and 70 °C, determine Match each item to a choice: Q the maximum pressure for the cycle, the net work output, in kJ/kg, the maximum temperature for the cycle the mean effective pressure,
At the beginning of the compression process of an air standard dual cycle with a compression ratio of 18, p = 100 kPa and T = 300 K. The pressure ratio for the constant volume part of the heating process is 1.5 and the volume ratio of the constant pressure part is 1.2.Determine (a) PVT relations(b) the thermal efficiency and (c) the MEP.
Consider a modification of the cold air-standard Otto cycle in which the isentropic compression and expansion processes are each replaced with polytropic processes having n = 1.3. The compression ratio is 12 for the modified cycle. At the beginning of compression, p1 = 1 bar and T1 = 300 K and V1 = 2270 cm3. The maximum temperature during the cycle is 2000 K. Determine the heat rejected in KJ, for the modified cycle. (A) 1.324 B) 1.336 (C) 1.230 D 1.010
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