16-16M Consider an air-standard Otto cycle that has a compression ratio of 8.3 and a heat addition of1456 kJ/kg of air. If the pressure and temperature at the beginning of the compression process are 0.95bar and 7°C, determine (a) the maximum pressure and temperature for the cycle, (b) the thermalefficiency, and (c) the mean effective pressure, on the basis of Table A-SM.16 11nir stand

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Answered: 16-16M Consider an air-standard Otto…

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) A four-cylinder engine has a compression ratio of 8, and cach cylinder has a maximum volume of 0.6 L. At the beginning of the compression process, the air is at 98 kPa and 17°C, and the maximum temperature in the cycle is 1800 K., dctermine (a) the amount of heat supplied per cylinder. (b) the thermal efficiency, and (c) the number of revolutions per minute rcquired for a net power output of 60 kW. Study the effect of varying the compression ratio from 5 to 11 on the network done and the efficiency of the cycle. Plot the P-v and T-s diagrams for the cycle, and discuss the results.
The pressure and temperature at the beginning of compression of an air-standard Diesel cycle are 80 kPa and 300 K, respectively. At the end of the heat addition, the pressure is 6821 kPa and the temperature is 1950 K. Step 1 Determine the compression ratio. r = i Save for Later Attempts: 0 of 3 used Submit Answer Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above. Ston 3
just answer part d please, thank you 9-34 An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kg and 27°C, and 750 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Taking into account the variation of specific heats with temperature, determine (a) the pressure and temperature at the end of the heat-addition process. (b) the net work output. (c) the thermal efficiency. and (d) the mean effective pressure for the cycle.
An air standard Otto cycle at the start of the isentropic compression has P₁ = 100 kPa and T₁ = 27°C. The compression ratio is 10 and during the heat addition process 1000 kJ/kg are supplied. Using the cold air standard analysis method, the net work for this cycle is most nearly equal to: A. 960 kJ/kg B. 900 kJ/kg C. 602 kJ/kg D. 333 kJ/kg E. Cannot be determined with the given information
THERMODYNAMICS Consider an air-standard Otto cycle with a heat addition of 800 Btu/bm of air, a compression ratio of 7, and a pressure and temperature at the start of the compression process of 13 lbf/in2, 50 F to simulate an actual spark-ignition engine. Determine the maximum pressure and temperature of the cycle, the thermal efficiency of the cycle, and the mean effective pressure assuming the variation of specific heat with the value from table A-19E Show Complete solution on a paper.
Consider a Diesel cycle with cold-air-standard assumptions, and compression ratio of 21. The temperature and pressure at the beginning of the compression process are 320K and 120kPa respectively. The cutoff ratio for this cycle is 1.8. The isentropic efficiency of the compression and expansion process are 85%. Determine the temperature and pressure at the end of each process of the cycle, the heat transfer per unit mass in and out of the air; qin and qout, thermal efficiency of the cycle, and the mean effective pressure of the cycle.
3. An air-standard Diesel cycle has a compression ratio of 16 and a cutoff ratio of 2. At the beginning of the compression process, air is at 95 kPa and 27 °C. Accounting for the variation of specific heats with temperature, determine (a) the temperature after the heat addition process, (b) the thermal efficiency. and (c) the mean effective pressure. T, K h, kJ/kg Pr u, kJ/kg 300 300.19 1.3860 214.07 621.2 57.60 624.95 41.85 840 866.08 860 888.27 63.09 641.40 39.12 880 910.56 68.98 657.95 36.61 900 932.93 75.29 674.58 34.31 1700 1880.1 1025 1392.7 4.761 1750 1941.6 1161 1439.8 4.328 sº, kJ/(kg-K) 1.70203 2.77170 2.79783 2.82344 2.84856 3.5979 3.6336
H.W2: An air-standard Carnot cycle is executed in a closed system between the temperature limits of 350 and 1200 K. The pressures before and after the isothermal compression are 150 and 300 kPa, respectively. If the net work output per cycle is 0.5 kJ, determine (a) the maximum pressure in the cycle, (b) the heat transfer to air, and (c) the mass of air. Assume variable specific heats for air. Answers: (a) 30,013 kPa, (b) 0.706 kJ, (c) 0.00296 kg
A gas turbine cycle with two stage of compression and two stage of expansion, the overall pressure ratio is 9, air enters each stage of compression at 298 K and each stage of turbine at 1200 K. Determine the thermal efficiency of the cycle under the following conditions:- 1- no heat exchanger is used. 2- ideal regenerator is used
! 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.
An engine operates with air on the cycle shown with isentropic processes 1- 2 and 3 - 4, and constant volume processes at 2 - 3 and 4 - 1. If the compression ratio (r) is 12, the minimum pressure is 200 kPa, and the maximum pressure is 10 MPa, determine the mean effective pressure. (Note:r = V1/V2 = V4/V3). TDC BDC v = const. МЕР: v = const.
Required information Problem 09.052 - Ideal Diesel Cycle with Variable Specific Heats - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS An air-standard Diesel cycle has a compression ratio of 16 and a cutoff ratio of 2. At the beginning of the compression process, air is at 103 kPa and 27°C. Account for the variation of specific heats with temperature. The gas constant of air is R= 0.287 kJ/kg-K. Problem 09.052.b - Thermal Efficiency in Variable Heat Capacity Diesel Cycle Determine the thermal efficiency. (You must provide an answer before moving on to the next part.) The thermal efficiency is 59.38 %.

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