8. An air-standard dual cycle has a compression ratio of 14 and a cutoff ratio of 1.2. The pressure ratio during the constant-volume heat addition process is 1.5. The cycle is operated at 80 kPa and 20°C at the beginning of the compression. Determine the followir a. thermal efficiency. 64.59% b. amount of heat added. 556.7054 kJ/kg c. the maximum gas pressure and temperature. 1242.6235°C, 4827.9248 kPa d. Mean effective pressure, 368. 2974 kPa

8. An air-standard dual cycle has a compression ratio of 14 and a cutoff ratio of 1.2. The pressure ratio during the constant-volume heat addition process is 1.5. The cycle is operated at 80 kPa and 20°C at the beginning of the compression. Determine the followir a. thermal efficiency. 64.59% b. amount of heat added. 556.7054 kJ/kg c. the maximum gas pressure and temperature. 1242.6235°C, 4827.9248 kPa d. Mean effective pressure, 368. 2974 kPa

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. What is the specific enthalpy at the outlet of the turbine and compressor in KJ/Kg 2.what is the power output per unit mass flow rate of air of the turbine . 3.what is the rate of heat input per unit mass flow rate of the air during the heat addition process
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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
. An ideal air standard Otto cycle has a compression ratio of 8.5. If the ratio of the specific heats of air (y) is 1.4, what is the thermal efficiency (in percentage) of the Otto cycle? O A. 575 O B. 45.7 O C. 52.5 O D. 95
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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