2nd-Law Analysis of Otto Cycles Consider an engine operating on the ideal Otto cycle with a compression ratio of 8. At the beginning of the compression process, air is at 100 kPa and 17°C. During the constant-volume heat-addition process, 800 kJ/kg of heat is transferred to air from a source at 1700 K and waste heat is rejected to the surroundings at 290 K. Accounting for the variation of specific heats of air with temperature, determine (a) the exergy destruction associated with each of the four processes and the cycle and (b) the second-law efficiency of this cycle. P. kPa

2nd-Law Analysis of Otto Cycles Consider an engine operating on the ideal Otto cycle with a compression ratio of 8. At the beginning of the compression process, air is at 100 kPa and 17°C. During the constant-volume heat-addition process, 800 kJ/kg of heat is transferred to air from a source at 1700 K and waste heat is rejected to the surroundings at 290 K. Accounting for the variation of specific heats of air with temperature, determine (a) the exergy destruction associated with each of the four processes and the cycle and (b) the second-law efficiency of this cycle. P. 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

See similar textbooks

Related questions

Q: An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air…

Q: A spark-ignition engine operates on the ideal Otto cycle. The air enters the engine at 101 kPa and…

A: initial pressure (P1 ) = 101 kPa initial temperature (T1 ) = 32 °C = 32 + 273 = 305 K temperature…

Q: An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air…

A: Given:To find:Thermal efficiency.

Q: An ideal Otto cycle has a compression ratio of 6. At the beginning of the compression process, air…

Q: In ideal constant volume cycle, the pressure and temperature at the beginning of compression are 97…

A: Ideal gas equation relates the temperature, volume and pressure of an ideal gas. It is given as…

Q: Determine: the temperature and pressure at the end of each process of the cycle Determine: the…

Q: An engine, operating on an Otto cycle, has a compression ratio of 10/1. The pressure and temperature…

Q: Someone has suggested that the air-standard Otto cycle is more accurate if the two polytropic…

Q: In an ideal Diesel cycle, the pressure and temperature the the beginning of the adiabatic…

Q: In a cold-air standard diesel cycle, the volume of the cylinder amounts to 85 cm3 at the beginning…

Q: Soru 1 2The compression ratio of an ideal Otto cycle is 8. At the beginning of the compression…

A: Given: The compression ratio of the ideal Otto cycle is, r=8. The initial temperature of the air…

Q: Consider a regenerative gas-turbine power plant with two stages of compression and two stages of…

A: Data given- Pressure ratio = 9 T1 = 300 K T5 = 1200 K Pnet = 110 MW

Q: ON TWO A gas-turbine power plant operating on the simple Brayton cycle has a pressure ratio of 7.…

Q: An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air…

A: Given:Find:The net work output of the cycle.

Q: A gas-turbine power plant operating on an ideal Brayton cycle with a pressure ratio of 10 takes in…

Q: In an ideal Otto cycle, air is compressed from a volume of 2.5 L to 0.21 L at a temperature of 20°C.…

Q: At the beginning of the compression process of an ideal Diesel cycle, air is at 95 kPa and 22°C, and…

Q: An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air…

A: Given, Compression ratio (r) =V1V2= 8 P1 = 100 kPa T1 = 17°C=17+273=290 K Q = 800 kJ/kg T2= ? P2 =?…

Q: 16-5M An air-standard Carnot cycle rejects 100 kJ/kg to a sink at 300 K. The minimum and maxi- mum…

A: This question is based on the concept of Carnot cycle.

Q: al cycle has an initial temperature of 30°C. The compression ratio is 6 and the heat addition at…

A: Solution is attached below

Q: In an internal combustion engine, 2/3 of the heat supply takes place at constant volume and 1/3 at…

Q: For Otto cycle, what is the impact of the inlet properties on its efficiency? And for real car…

A: Otto cycle is an internal combustion engine cycle. Both the heat addition and the heat rejection…

Q: 3. An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process,…

A: Note: As per Expert Guidelines we are supposed to answer only the first three parts of the given…

Q: An ideal otto cycle has a compression ratio of 8(10.8). At the beginning of the Compression process,…

Q: Question 1 Consider an engine operating on the ideal Otto cycle with a compression ratio of 9.5. At…

Q: A gas-turbine engine operates with 2-stage compression and 2-stage expansion. It receives incoming…

Q: the béginning of An ideal Diesel cycle has a compression ratio of 16.6. process, air is at 540 R and…

Q: An ideal gas turbine cycle consisting of 2 stages of compression and 2 stages of expansion has an…

A: Since we answer only upto three subparts, we will solve the first three. Please resubmit the…

Q: At the beginning of the compression process of an ideal Diesel cycle, air is at 95 kPa and 27°C, and…

A: Solution:

Q: An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air…

Q: Consider a modification of the cold air-standard Otto cycle in which the isentropic compression and…

Concept explainers

IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.

Question

2nd-Law Analysis of Otto Cycles
Consider an engine operating on the ideal Otto cycle with a compression ratio of
8. At the beginning of the compression process, air is at 100 kPa and 17°C. During
the constant-volume heat-addition process, 800 kJ/kg of heat is transferred to air
from a source at 1700 K and waste heat is rejected to the surroundings at 290 K.
Accounting for the variation of specific heats of air with temperature, determine
(a) the exergy destruction associated with each of the four processes and the
cycle and (b) the second-law efficiency of this cycle.
P. kPa
Isentropic
in
Jout
Isentropic
100
38
V = V =
V = V4

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

An ideal gas turbine cycle consisting of 2 stages of compression and 2 stages of expansion has an overall pressure ratio of 9. Air enters the compressors at the temperature of 320 K while, being intercooled between the stages. Air enters the first compressor at 100 kPa and the pressure ratio of each of the compressors are selected in a way that minimizes the total power input for the compressors. The high-pressure turbine (First one) drives the compressors and the low-pressure one produces power output. The compressors and both the high-pressure and low-pressure turbines can be assumed ideal. To increase the efficiency of the cycle a regenerator with effectiveness of 85% is used to recover some heat from the exhaust of the second turbine. In this cycle, air with the temperature of 1400 K enters the first turbine. After expansion in the first turbine, air is reheated to the same temperature at the inlet of the first turbine (1400 K). You can consider constant specific heats of c,1.005…
A power cycle operates between two thermal reservoirs at 300 K and 800 K. The working fluid of the cycle is air, which can be considered to be an ideal gas. Specific heats are not assumed to be constant. An inventor claims that for a heat input of 250 kJ, the net work from the cycle is 80 kJ. The work generating component in the cycle is a reversible, steady state turbine. The inlet pressure and temperature are 1000 kPa and 600 K and the exit temperature is 550 K. The turbine receives 150 kJ/kg of heat from the high temperature reservoir and loses 10 kJ/kg of heat to the ambient at 298 K. (a) Prove whether or not the overall cycle is possible using second law arguments. (b) determine the work done by the turbine [kJ/kg]
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 mean effective pressure for the cycle. The mean effective pressure for the cycle is 0 kPa.
In an ideal diesel cycle the pressure and temperature at the beginning of the adiabatic compression are 98.5kN/m squared and 60 degrees c respectively.The maximum pressure attained during the cycle is 4.5MN/m squared and the heat received during the cycle is 580kJ/kg gas.Determine ,for the cycle, (a) the volume ratio of compression (b) the temperature at the end of compression (c) the temperature at the end of heat reception (d)the temperature at the end od adiabatic expansion
plementary Exam (1 x php?attempt=D176481 At the beginning of the compression process of an ideal Diesel cycle, air is at 95 kPa and 25°C, and 640 kJ/kg of heat is transferred to air during the heat-addition process. At the end of isentropic expansion process, air is at 265 kPa and 607°C. Taking into account the variation of specific heats with temperature, the thermal efficiency of the cycle is Lütfen birini seçin: а. 30.4% b. 27.5% c. 41.2% d. 37.3% e. 43.7% Sonraki sayfa
A Carnot engine using 1lbm air has the following conditions: heat addition beginning at 2200 psia and 22000R and continuing until the pressure is 1400 psia; isothermal compression from 14.7 psia and 5400R and continuing until the pressure is 23.1 psia. Determine (a) the heat transfer into the cycle; (b) the heat transfer from the cycle; (c) the work for each of the processes; and (d) the cycle efficiency.
Thermodynamics
Hello Sir,Good Night.I have a question in my homework related thermodynamics lesson.The following below is my question. Please advice, thank you
An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 103 kPa and 27°C, and 1850 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Accounting for the variation of specific heats of air with temperature, determine (a) The maximum temperature and pressure that occur during the cycle (b) The net work output (c) The thermal efficiency