Q13: In an ideal Otto cycle the air at the beginning of isentropic compression is at(1 bar) and (15 °C). The ratio of compression is (8). If the heat added during theconstant volume process is (1050 KJ/Kg), determine (a) the maximum temperature inthe cycle. (b) the air standard efficiency. (c) the work done per Kg of air. (d) the heatrejected. Take Cv. 0.714 Kj/Kg.K and y = 1.4.Answers: (a) T3-2132.23K (b) 56.47 % (c) 592.935 Kj/Kg (d) 457 KJ/Kg

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Answered: Q13: In an ideal Otto cycle the air at…

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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At the beginning of the compression process of a standard cold air Otto cycle, the air is at 100 kPa, 25 ° C and 1200 kJ / kg of heat is added during the constant volume heat addition process. If the compression ratio is 7.5, determine the following: a) The maximum temperature and pressure of the cycle. b) The net output work. c) Thermal efficiency and mean effective pressure.
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
! 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.
The intake air to an ideal Otto cycle has a maximum volume of 0.004 m3 at 27 o C and 101 kPa. If the displacement volume is 0.0035 m3 and the heat rejected from the cycle is 605 J, run an analysis to determine the following; 1- All volumes, pressures, and temperatures for all states. 2- The total heat added to the cycle, Qin 3- The total heat rejected from the cycle, Qrej 4- The total work done by the cycle, Wnet 5- The thermal efficiency of the cycle, ηth
What is/are the thermodynamics cycles involved in a vapor compression cycle? Describe each cycle. And give some example in each.
In an Otto cycle, the volume at the beginning of the isentropic compression is 0.74 L. If the displaced volume of the cycle is 0.68 L. the specific heat ratio is y=1.3 and the heat rejected is 405 kJ/kg, the work done in kj per kg of air is: Select one: O a. 521.4 O b. 455.6 Oc. 705.2 O d. 124.5
! 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, cv=0.718 kJ/kg-K, and k=1.4. Problem 09.015.a - P-v and T-s Diagrams for Constant Heat Capacity Air-Standard Cycle Show the cycle on P-v and T-s diagrams. (Please upload your response/solution using the controls provided below.) (You must provide an answer before moving on to the next part.) upload a response file (15MB max) Browse... No file selected. save
3
An air-standard Otto Cycle with a compression ratio of 9.0 has air entering at 101 kPa and 27 deg C. There is an input of 1 800 kJ/kg of heat during the heat addition process. Determine maximum temperature in Fahrenheit, thermal efficiency and net work (k]/kg).
Consider an air standard Brayton cycle. Air enters the compressor at 100 kPa, 300 K. At the cycle, pressure ratio is 9 and rejected heat (qout) is 450 kJ/kg. Determine the work output (wnet) in kJ/kg applying the cold-air-standard assumptions. (for air c,-0.718 kJ/kg.K, Cp 1.005 kJ/kg.K, k-1.4)
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 09.015 - 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, cv=0.718 kJ/kg-K, and k=1.4. Problem 09.015.c - Cycle Efficiency for Constant Heat Capacity Air-Standard Cycle Determine the thermal efficiency. The thermal efficiency is %.

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