As shown in (a) P-v diagram and (b) T-s diagram, an ideal diesel engine has a compression ratioof 20 and uses air as the working fluid. The state of air at the beginning of the compressionprocess is P1 = 95 kPa and T1 = 20°C. If the maximum temperature in the cycle is not to exceedT3 = 2200 K, determine (be noted with the formula below):9inFinP = constantIsentropicYoutIsentropicV = constant(a) P-v diagram(b) T-s diagram(a) the temperature T2 after the compression (K).(b) the temperature T4 after the expansion (K). (hint: 3 = V2V2 V4V4(c) the thermal efficiency of the cycle (%).**********************O ideal gas equation of state:Pv = RT, PV = mRT,T2P2V2T1k-12 ideal gas undergoing an isentropic process:%3D3 constant specific heats and gas constant:kJ= 1.005kg · K'kJCy = 0.718-kg · K'kJR = 0.287Cp =k = 1.4,kg · K4 efficiency of diesel engineT4 – T1k(T3 – T2)n = 1–**********************************************

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As shown in (a) P-v diagram and (b) T-s diagram, an ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is P1 = 95 kPa and T1 = 20°C. If the maximum temperature in the cycle is not to exceed T3 = 2200 K, determine (be noted with the formula below): %3! %3D %3D

As shown in (a) P-v diagram and (b) T-s diagram, an ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is P1 = 95 kPa and T1 = 20°C. If the maximum temperature in the cycle is not to exceed T3 = 2200 K, determine (be noted with the formula below): %3! %3D %3D

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 an ideal Brayton cycle using air as the working fluid, operating with a pressure ratio of 17. Air at 50 kg/s enters the compressor at 150 kPa and 700 K. The air then enters the turbine at 3000 K. Assume gas constant and specific heats at room temperature. Apply the ideal gas equation of state and isentropic relationships of ideal gas appropriately. (а) Analyse all pressures and temperatures in the cycle (b) Using values of Qin, Qout and Wnet in MW, determine the thermal efficiency of the суcle. (c) Illustrate proper P - v and T –s diagrams for the cycle, indicating all pressures and temperatures obtained in (a).
In an air standard diesel cycle, compression starts at 100 kPa and 303 K. The compression ratio is 20 to 1. The maximum cycle temperature is 2,200 K. Determine the thermal efficiency.
An ideal diesel cycle powered by air has a compression ratio of 20. At the beginning of the compression process, the pressure of the air is 100 kPa, the temperature is 20°C, and it is desired that the highest temperature of the cycle should not exceed 2250 K. Show the cycle in the P-v diagram. Assume the specific heats are constant at room temperature. k=1.4 CP=1.005kJ/kgK CV=0.718 kJ/kgK R=0.287kJ/kgK a) Calculate the heat entering and leaving the cycle, the thermal efficiency of the cycle, b) Calculate the average effective pressure of the cycle.
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In an ideal diesel cycle the pressure and temperature at the beginning of the adiabatic compression are 98.5kN/m^3 and 60°c, respectively.themaximum pressure attained during the cycle is 4.5MN/m^3 and the heat received during the cycle is 580kJ/kg gas.Determine for the cycle a) the volume ratio of compression b) the temperature at the end of compression c) the temperature at the end of heat reception d) the temperature at the end of adiabatic expansion e) the net work done/kg of gas f) the thermal efficiency g) the work ratio h) the mean effective pressure I) the Carnot efficiency within the cycle temperature limits.
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