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 thevariation of specific heats with temperature. The gas constant of air is R = 0.287 kJ/kg.K.Determine the thermal efficiency. (You must provide an answer before moving on to the next part.)The thermal efficiency is0 %.

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Answered: An ideal Otto cycle has a compression…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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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 the variation of specific heats with temperature. The gas constant of air is R = 0.287 kJ/kg.K. 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.) kPa. The pressure at the end of the heat-addition process is 4568.67 The temperature at the end of the heat-addition process is 1803.425 > K.
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 the variation of specific heats with temperature. The gas constant of air is R = 0.287 kJ/kg.K. 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 The temperature at the end of the heat-addition process is 0 kPa. 이 OK.
Let’s examine the engine of a Honda CB1000RR. But first, some idealizations:we will evaluate the engine using an ideal Otto cycle with variable specific heats.At the start of each cycle, air is at 100 kPa and 298 K, and has a gas constant of around 0.287kJ/kg-K. The maximum temperature at the end of heat addition is assumed to be 2200 K.The Honda CB1000RR has a four-stroke I4 spark-ignition (SI) engine: four cylinders, each with 25 cc (or cm3) of maximum volume. Its compression ratio is 10.8. At our preferred condition, the engine runsat 9,000 revolutions per minute, with two cylinders undergoing a power stroke every revolution.a. Sketch the Pressure (kPa) - volume (cc) and Temperature (K) - entropy (s) diagram of the cycle.For entropy, you may leave it as s1, s2, etc. b. Calculate the specific net work (kJ/kg) and the efficiency (%). c. Calculate the mean effective pressure (kPa) and the power produced by the engine (in kW).
! 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.
An ideal Otto cycle has a compression ratio of 8. At the beginning of thecompression process, air is at 100 kPa and 170C, and 800 kJ/kg of heat is transferredto air during the constant-volume heat-addition process. Accounting for thevariation of specific heats of air with temperature, determine (a) the maximumtemperature 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. (e) Also,determine the power output from the cycle, in kW, for an engine speed of 4000 rpm(rev/min). Assume that this cycle is operated on an engine that has four cylinderswith a total displacement volume of 1.6 L.
! 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.c - Thermal Efficiency in Variable Heat Capacity Ideal Otto Cycle Determine the thermal efficiency. (You must provide an answer before moving on to the next part.) The thermal efficiency is 54.3 %.
A spark ignition engine that operates on Otto cycle has a compression ratio of 10. At the beginningof the compression process, air is at 100 kPa and 25 C. 750 kJ/kg of heat is transferred to air duringthe constant-volume heat-addition process. Solve with given information under cold air standard assumptions, determine the net-work output, and the thermal efficiency of the cycle.
An Otto cycle uses air as its working fluid. The compression ratio of the cycle is 10. 1,800 kJ/kg of heat is added during the heat addition process. If the temperature and pressure at the end of compression are 444C and 2,168Kpa. Assume constant specific heats for the analysis, determine (a) the temperature and pressure at the end of each process, (b) the thermal efficiency of the process (c) the net Work of the cycle (d)mean effective pressure of the cycle.
Let us consider a standard air cycle with variable specific heats, where 0.003 kg of air is added as the working fluid. The complete cycle is composed of:1-2 Addition of heat at v=cte of 95 kPa and 17°C up to 380 kPa.2-3 Isentropic expansion up to 95 kPa.3-1 Heat rejection at P=cte up to the initial state. Determine the net work done by the cycle and the thermal efficiency.
An air-standard cycle with variable specific heats is executed in a closed system with 0.003 kg of air, and it consists of the following three processes: 1-2 Isentropic compression from 3-1 v = constant heat rejection to initial state (a) Show the cycle on P-v and T-s diagrams. (b) Calculate the maximum temperature in the cycle. (c) Determine the thermal efficiency.
A four-cylinder, four-stroke, 2.2-L gasoline engine operates on the Otto cycle with a compression ratio of O. The air is at 100 kPa and 60°C at the beginning of the compression process, and the maximum pressure in the cycle is 8 MPa. The compression and expansion K, determine (a) the processes may be modeled as polytropic with a polytropic constant of 1.3. Using constant specific heats at temperature at the end of the expansion process, (b) the net work output and the thermal efficiency, (c) the mean effective pressure, (d) the engine speed for a net power output of 70 kW, and (e) the specific fuel consumption, in g/kWh, defined as the ratio of the mass of the fuel consumed to the net work produced. The air-fuel ratio, defined as the amount of air divided by the amount of fuel intake, is 16.
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 co air during the constant-volume heat-addition process. Take c,= 1.005 kJ/kg•K, Cx= 0.718 kJ/kg •K for air. Determine: a) Maximum temperature and pressure that occur during the cycle. Te = 665.24 T3=1462.2 Ty= 165,21 b) Net work output. c) Thermal efficiency. d) Mean effective pressure for the cycle. 7 = 56.97% e) Represent the cycle on p-v diagram. Py 219.46

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