STEP 3 To review the efficiency of ideal heat engines operating on the Otto and Diesel cycles, you are asked to perform the following branches: • Provide general plot(s) for thermal efficiency, O vs compression ratio, r for ideal Otto and diesel engines and show the typical compressions ratios. Compare your plots in terms of the typical compression ratio values. • Using your plot of the thermal efficiency, O vs compression ratio, r for ideal diesel engine, show how will the thermal efficiency of the diesel engine, O would change with the cut-off ratio values. • Explain mathematically how the thermal efficiency, D of Otto cycle is always higher than diesel cycle if-and-only-if both engines are operated at the same compression ratio, D. • Based on your previous answer, indicate why we use diesel engines. • Conclude your results of step 3 in two sentences.

STEP 3 To review the efficiency of ideal heat engines operating on the Otto and Diesel cycles, you are asked to perform the following branches: • Provide general plot(s) for thermal efficiency, O vs compression ratio, r for ideal Otto and diesel engines and show the typical compressions ratios. Compare your plots in terms of the typical compression ratio values. • Using your plot of the thermal efficiency, O vs compression ratio, r for ideal diesel engine, show how will the thermal efficiency of the diesel engine, O would change with the cut-off ratio values. • Explain mathematically how the thermal efficiency, D of Otto cycle is always higher than diesel cycle if-and-only-if both engines are operated at the same compression ratio, D. • Based on your previous answer, indicate why we use diesel engines. • Conclude your results of step 3 in two sentences.

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: d) Calculate the maximum cycle pressure. Pmaz bar e) Calculate the maximum cycle temperature. Tmaz =…

A: Taken the snip of the diagram given in the question,

Q: The displacement volume of an internal combustion engine is 2.15 liters. The processes within each…

Q: a. State diagrams of the cycles, and b. Sample calculations of the performance of the cycles in…

Q: To review the efficiency of ideal heat engines operating on the Otto and Diesel cycles, you are…

A: The thermal efficiency of the diesel cycle and otto cycle is given as follows,

Q: Having determined the efficiency of different above engines, you should review these efficiencies by…

A: Write the given data. For compression ignition engine,Compression ratio, r=6+φ=6+0.2=6.2Cut off…

Q: A four-cylinder compression-ignition engine with a compression ratio of 18 has pistons with a bore…

Q: GE Y 8.2.1: Evaluating the performance of a piston-cylinder assembly undergoing an air-standard Otto…

A: Step 1: (1). Calculate the temperature at the end of the compression stroke (T2): For an…

Q: Describe in your own words the operation of a petrol engine, and explain how it is estimated by the…

A: A petrol engine is a type of internal combustion engine that runs on gasoline as its fuel. It works…

Q: At the beginning of the compression process of an air standard Otto cycle, p1 =1 bar, T1 = 300 K.…

Q: The following details were noted in a test on a single-cylinder four-stroke oil engine: bore = 150…

Q: Consider an air-standard Diesel cycle. Operating data at principal states in the cycle are given in…

Question

STEP 3
To review the efficiency of ideal heat engines operating on the Otto and Diesel
cycles, you are asked to perform the following branches:
• Provide general plot(s) for thermal efficiency, O vs compression ratio, r
for ideal Otto and diesel engines and show the typical compressions
ratios. Compare your plots in terms of the typical compression ratio
values.
• Using your plot of the thermal efficiency, O vs compression ratio, r for
ideal diesel engine, show how will the thermal efficiency of the diesel
engine, O would change with the cut-off ratio values.
• Explain mathematically how the thermal efficiency, D of Otto cycle is
always higher than diesel cycle if-and-only-if both engines are operated
at the same compression ratio, D.
• Based on your previous answer, indicate why we use diesel engines.
• Conclude your results of step 3 in two sentences.

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

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 2 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

Please do parts A, B and C
Discuss, with the aid of diagrams, the principles of operation of gas turbine plants.
Evaluate the performance of 2 and 4 stroke diesel engines, pay particular attention to fuelconsumption, but do not ignore other parameters such as power and operating characteristics
b) Calculate the maximum compression ratio of an Otto cycle internal combustion engine operating on natural gas, Methane (CH4) which has an auto-ignition temperature 540°C in air given an ambient intake temperature of 30°C.
Please do parts D and E
I need help on this assignment: Exhaust gases from the turbine of a simple Brayton cycle are quite hot and may be used for other thermal purposes. One proposed use is generating saturated steam at 110℃ from water at 30℃ in a boiler. This steam will be distributed to several buildings on a university campus for space heating. A Brayton cycle with a pressure ration of 6 is to be used for this purpose. Plot the following:(a) The mechanical power produced,(b) the flow rate of the produced steam,(c) the maximum cycle temperature, all as functions of the rate at which heat is added to the cycle.
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
please help me with this
2 A six-cylinder, four-stroke, direct-injection oil engine is to deliver 120 kW at 1600 rpm. The fuel to be used has a calorific value of 43 MJ/kg and its percentage composition by mass is carbon 86.0%, hydrogen 13.0%, non combustibles 1.0%. The absolute volumetric efficiency is assumed to 80%, the indicated thermal efficiency 40% and the mechan- ical efficiency 80%. The air consumption to be 110% in excess of that required for theoretically correct combustion. (i) Estimate the volumetric composition of dry exhaust gas (ii) Determine the bore and stroke of the engine, taking a stroke to bore ratio as 1.5. Assume the volume of 1 kg of air at the given conditions as 0.77 m³. Oxygen in air is 23% by mass and 21% by volume.