5.)(II) The idealized air-standard Diesel cycle is shown inFig. 21.26. Air enters the combustion chamber in an intakestroke (not shown). It is adiabatically compressed from a tob. At b fuel enters the system and starts to burn, essentiallyat constant pressure. This process continues until point c,when the gas expands adiabatically to point d. This is thepower stroke. In the exhaust stroke, the combustion prod-ucts cool at constant volume from d back to the initial pointa. Show that the efficiency is1 (Ta- Tay Te The = 1.1-4-FIGURE 21.26 Problem 5V

Answered: Image /qna-images/answer/bf539583-89e4-4ff3-b6f4-acf76dd6125e.jpg

Answered: 5. (II) The idealized air-standard…

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

Similar questions

Sketch the Brayton cycle . Air enters the compressor of the cycle at 1 bar and 25 °C. Pressure after compression is 3 bar. Temperature at turbine inlet is 650 °C. Determine per kg of air a. Cycle efficiency, b. Heat supplied to air c) Work available,
In actual 4 stroke engine cycle, combustion chamber pressure at the end of exhauststroke is greater than the atmospheric pressure and the pressure of the intake port onaverage is less than the atmospheric pressure. In theory, early opening of the intakevalve before the TDC should not result with fresh air getting inside the combustionchamber. However in actual applications,intake valve is opened 20 ~ 40 ᵒ CA beforethe TDC (Intake valve opening advance), inorder to increase the fresh air transfer intothe combustion chamber. Explain howintake valve opening advance increasesfresh air transfer into the combustionchamber.
1. In an ideal air-standard Otto cycle, the initial conditions are 1 bar and 300 K. The compression ratio is 12:1, and the maximum cycle temperature is 2500 K. Assuming cp = 1.004 kJ/kg-K & k = 1.4, find: (a) show the cycle in both P-v and T-s diagrams. Clearly label all states and energy transfers. (b) temperature at the end of compression, T₂ in K. (c) heat added during the combustion process in kJ/kg. (d) thermal efficiency of the cycle. (e) net work output from the cycle in kJ/kg.
The pressure and temperature at the beginning of compression of a cold air-standard Diesel cycle are 90 kPa and 300 K, respectively. At the end of the heat addition, the pressure is 7.2 MPa and the temperature is 2050 K. Assume constant specific heats evaluated at 300 K.Determine:(a) the compression ratio.(b) the cutoff ratio.(c) the percent thermal efficiency of the cycle.(d) the mean effective pressure, in kPa.
3) Combined Cycle (CC) Natural Gas Power: Cheap natural gas (mostly fromfracking and similar extraction techniques) and CC gas plants are one of theprimary reasons that US carbon emissions peaked in ∼2010 and has been declining. Here, natural gas powers a Brayton cycle turbine, and the exhaustfrom that turbine is then fed into a steam generator to run a Rankine cycleturbine.a) The high temperature in the Brayton cycle turbine is 1500K. The exhaust for the Braytoncycle exits at about 850K. What is the maximum efficiency that you could expect from aheat engine operating between these two temperature extremes? b) A heat exchanger is able to deliver the Brayton cycle exhaust to a Rankine (steam) cycle.The the final outgoing temperature from this steam cycle is 325K. What is the maximumefficiency that you could expect to achieve operating between the high temperature fromthe Brayton cycle and the low temperature from the Rankine cycle? (That is, what is thetheoretical max efficiency of the…
The pressure and temperature at the beginning of compression of an air-standard Diesel cycle are 90 kPa and 300 K, respectively. At the end of the heat addition, the pressure is 6821 kPa and the temperature is 1950 K. Determine: (a) the compression ratio, r. (b) the cutoff ratio, rc. (c) the thermal efficiency of the cycle, ?th (%). (d) the mean effective pressure, mep (kPa).
A gas turbine power plant operates on a simple thermodynamic cycle. The ambient conditions are 100 kPa and 24 °C. The air at this condition enters the engine at 150 m whose diameter is 0.5 m. The pressure ratio across the compressor is 13, and the temperature at the turbine inlet is 1400 K. Assuming ideal operation for all components and specific heats for air and products separately. In addition, neglect the mass of fuel burned. Do the followings: d. Determine the pressure and the temperature at the turbine exit, e. Compute the power produced by the turbine f. Available specific work g. The thermal efficiency.
Air enters the compressor of a cold air-standard Brayton cycle with regeneration at 90 kPa, 293 K, with a mass flow rate of 6 kg/s. The compressor pressure ratio is 10, and the turbine inlet temperature is 1300 K. The turbine and the compressor each have isentropic efficiencies of 85% and the regenerator effectiveness is 85%. Assume constant specific heats, take k = 1.4 and CP = 1.005 kJ/kgK. 3.2.1 Represent the cycle on a T – s diagram. Calculate: 3.2.2 the thermal efficiency of the cycle, 3.2.3 the back work ratio, and 3.2.4 the net power developed, in kW.
A gas turbine power plant operates on a simple thermodynamic cycle. The ambient conditions are 100 kPa and 24 °C. The air at this condition enters the engine at 150 m whose diameter is 0.5 m. The pressure ratio across the compressor is 13, and the temperature at the turbine inlet is 1400 K. Assuming ideal operation for all components and specific heats for air and products separately. In addition, neglect the mass of fuel burned. Do the followings: a. Choose the suitable thermodynamic cycle b. Draw pv and Ts diagram and label it c. Calculate the power required by the compressor d. Determine the pressure and the temperature at the turbine exit, e. Compute the power produced by the turbine f. Available specific work g. The thermal efficiency.
Given a Brayton cycle, with a pressure ratio equivalent to 12, as shown in the figure, determine its thermal efficiency, in %. Use Standard Cold Air Assumption Method (constant specific heats at room temperature, 25ºC).
Provide complete solution and diagram for this problem. In a Brayton cycle, the compression ratio of compressor is 8. Find the cycle efficiency of thecycle. A. 56.47% B. 50.34% C. 45.34% D. 65.34% Answer: A
Give the design formulae of a dry liner in an internal combustion engine.?

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS