n 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 the thermal efficiency. Note: @T = 300K, u = 214.07kJ/kg, v = 621.

n 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 the thermal efficiency. Note: @T = 300K, u = 214.07kJ/kg, v = 621.

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

See similar textbooks

Similar questions

The compression ratio of an ideal Otto cycle is 10. At the beginning of the compression process, the air is at 100 kPa and 18°C. The temperature at the end of the heat-addition process is 1750°C. Under cold-air-standard conditions (R=0.287 kJ/kgK, Cv=0.718 kJ/kg K, Cp=1.005 kJ/kg K), the heat transferred from the air during the heat-rejection process is
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.
Required information 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 790 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Take into account constant specific heats at room temperature. The properties of air at room temperature are cp= 1.005 kJ/kg-K, cv = 0.718 kJ/kg-K, R = 0.287 kJ/kg-K, and k = 1.4. Determine the mean effective pressure for the cycle. The mean effective pressure for the cycle is kPa.
Required information 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 800 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Take into account constant specific heats at room temperature. The properties of air at room temperature are cp = 1.005 kJ/kg-K, cv=0.718 kJ/kg-K, R = 0.287 kJ/kg-K, and k = 1.4. Determine the net work output. The net work output is kJ/kg.
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 99 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. Determine the mean effective pressure. The mean effective pressure is 569.685 kPa.
Required information 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 730 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Take into account constant specific heats at room temperature. The properties of air at room temperature are cp=1.005 kJ/kg-K. cy=0.718 kJ/kg-K, R=0.287 kJ/kg-K, and k=1.4. Determine the net work output. (You must provide an answer before moving on to the next part.) The net work output is kJ/kg.
A 4 stroke spark ignition engine operates on an ideal Otto cycle with a compression ratio of 8.5. This engine compresses the fresh air-fuel mixture from its initial volume to a final volume of 75cm. The air is at 101kPa and 20°C prior to the compression stroke. Temperature at the end of isentropic expansion is 750K. Make air standard assumption to solve this problem. Air properties: cp = 1.005KJ/kg.K; cy = 0.718KJ/kg.K; R = 0.287KJ/kg.K. Determine, • Mass of air in the engine (in kg). (answer to 4 decimals) (Hint: treat air as ideal gas at start of intake stroke - point 1 on P-V diagram) Isentropic Isentropic * Iout BDC TDC
An ideal Otto cycle has a compression ratio of 8. At the beginning of the Compression process, air is at 100 kPa and 17°C, and 800 kJ/kg of heat is Transferred to air during the constant-volume heat-addition process. (a) the maximum temperature and pressure that occur during the cycle, (b) The net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. P. kPa Isentropic 4 in Isentropic 100 Jour V₁ = V₁
Required information 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 790 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Take into account constant specific heats at room temperature. The properties of air at room temperature are cp= 1.005 kJ/kg-K, cy= 0.718 kJ/kg-K, R = 0.287 kJ/kg-K, and k = 1.4. Determine the net work output. (You must provide an answer before moving on to the next part.) The net work output is kJ/kg.
An air standard dual cycle has a compression ratio of 17. At the beginning of compression, p1 = 100 kPa and T1 = 15 o C and volume is 0.5 ft. 3. The pressure doubles during the constant volume heat addition process. For maximum cycle temperature of 1400 o C, determine (a) The heat added, (b) The heat rejected (c) The expansion ratio (d) The cut-off ratio