3. An air-standard Diesel cycle has a compression ratio of 16 and a cutoff ratio of 2. At the beginning ofthe compression process, air is at 95 kPa and 27 °C. Accounting for the variation of specific heats withtemperature, determine (a) the temperature after the heat addition process, (b) the thermal efficiency.and (c) the mean effective pressure.T, Kh, kJ/kg Pru, kJ/kg300300.191.3860 214.07 621.257.60 624.95 41.85840866.08860 888.27 63.09641.40 39.12880 910.56 68.98657.95 36.61900 932.93 75.29 674.58 34.311700 1880.1 1025 1392.7 4.7611750 1941.6 1161 1439.8 4.328sº, kJ/(kg-K)1.702032.771702.797832.823442.848563.59793.6336

Given: The compression ratio is r=16. The cut off ratio is rc=2. The pressure at the beginning of…

Answered: 3. An air-standard Diesel cycle has a…

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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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.
Required information Problem 09.015 - 3-Step Air-Standard Cycle with Constant Specific Heats - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS An air-standard cycle with constant specific heats at room temperature is executed in a closed system with 0.003 kg of air and consists of the following three processes: 1-2 v= Constant heat addition from 95 kPa and 17°C to 380 kPa 2-3 Isentropic expansion to 95 kPa 3-1 P = Constant heat rejection to initial state The properties of air at room temperature are cp = 1.005 kJ/kg-K, cy= 0.718 kJ/kg-K, and k = 1.4. Problem 09.015.b - Net Work for Constant Heat Capacity Air-Standard Cycle Calculate the net work per cycle, in kJ. (You must provide an answer before moving on to the next part.) The net work per cycle is kJ.
! 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.
Assuming a compression ignition engine having a cut-off ratio of 2 and a compression ratio of 20. Before the compression stroke, air is at 100kPa, 20°C and a volume of 500 cm³. Determine (in kPa) the mean effective pressure of the cycle
Temperature after the heat addition process = K Thermal efficiency =% Mean effective pressure = kpa

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