Q14 An air standard Otto cycle has a compression ratio of (8), temperature andpressure at the beginning of compression are (20 °C) and (1 bar) respectively. Theconstant volume heat addition is (1800 Kj/Kg). Calculate the maximum temperatureand pressure for the cycle and the temperature at the end of the expansion process.What is the efficiency and mean effective pressure of the cycle? Take Cv = 0.7288Kj/Kg.K and y=1.41.Answers: T3-3156.8K, P3-8622.6 KN/m², T4=1345.8K, 57.36 %, 1348.9 KN/m²

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Answered: Q14 An air standard Otto cycle has a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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The compression ratio in an air standard Otto cycle is 9. At the beginning of the compression stroke, the pressure is 0.1 MPa and the temperature is 21 C. The heat transfer to the air per cycle is 2000 kJ/kg. Use the PG model for air. I am trying to find the Mean Effective Pressure from this information
Q7 The initial condition for an air-standard Otto cycle operating with acompression ratio of (8:1) are (0.95bar) and (17 °C). At the beginning of the compression stroke, the Cylinder volume is (3.8 103 m³) and (7.5Kj) of heat are added to the gas. Calculate the Pressure and temperature at the end of each process and determine the thermal efficiency and mean effective pressure of the cycle.
In a C.I. engine working on the dual combustion cycle the compression ratio is 12.5:1. Air at 101.3kPa and 35°C is compressed adiabatically. Fuel is then added until the pressure reaches 4000kPa, then at constant pressure to a temperature of 1425°C. After adiabatic expansion to the initial volume exhaust takes place. Calculate: (a). work done/kg air (b). thermal efficiency
An ideal Brayton cycle has a pressure ratio of 8. At the beginning of the compression process, air is at 300 K. If Tmax in the cycle is 1200 K, determine the temperature of air, in K, at the beginning of heat exchange processes.determine the back-work ratio,determine the thermal efficiency of the cycle (Apply air-standard assumptions: variable specific heat)
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An ideal Brayton cycle has a pressure ratio of 8. At the beginning of the compression process, air is at 300 K. If Tmax in the cycle is 1200 K, determine the temperature of air, in K, at the beginning of heat exchange processes. (Apply air-standard assumptions: variable specific heat)
Determine the mean effective pressure in kPa to an air standard diesel cycle has a compression ratio of 18 and the heat transferred is 1800 KJ/kg. At the beginning of the compression process the pressure is 100 KPa and the temperature is 15C for 1kg of air.
1. Cylinder conditions at the start of compression in an SI engine operating at WOT on an air-standard Otto cycle are 60°C and 98 kPa. The engine has a compression ratio of 9.5:1 and uses gasoline with AF = 15.5. Combustion efficiency is 96%, and it can be assumed that there is no exhaust residual. Heating value of the fuel is about 44MJ/kg. Calculate: (a) Temperature at all states in the cycle. [°C] (b) Pressure at all states in the cycle. [kpa] (c) Specific work done during power stroke. [kJ/kg] (d) Heat added during combustion. [kJ/kg] (e) Net specific work done. [kJ/kg] (f) Indicated thermal efficiency. [%]
Q3: An Otto cycle has a compression ratio of (8.5) at the beginning of the com. Press ion stroke, the temperature is (300K) and the pressure is (90KPa). If the heat input is (800Kj) and the maximum temperature in the cycle is 1100K, determine (a) The mass of air in the cycle. (b)The heat rejection. (c) thermal efficiency. (d) The mean effective pressure.
Required information Problem 09.052 - Ideal Diesel Cycle with Variable Specific Heats - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS 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 103 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. Problem 09.052.b - Thermal Efficiency in Variable Heat Capacity Diesel Cycle Determine the thermal efficiency. (You must provide an answer before moving on to the next part.) The thermal efficiency is 59.38 %.
please use international values
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