(a) Explanation The p − v diagram for the diesel cycle is shown below. Figure-(1) The T − s diagram for the diesel cycle is shown below. Figure-(2) Write the expression for relation between, temperature and compression ratio for process 1-2. T 2 T 1 = ( r c ) γ − 1 (I) Here, the temperature at compressor outlet is T 2 , the compressor inlet is T 1 and the compression ratio is r c . Write the expression for expansion ratio for process 3-4. ε = r c ⋅ T 2 T 3 (II) Here, the compression ratio is r c and temperature at point 2 is T 2 and at point 3 is T 3 . Write the expression for relation between, temperature and expansion ratio for process 3-4. T 4 T 3 = ( 1 ε ) γ − 1 (III) Here, the temperature at the end of expansion process is T 4 , the temperature at the starting of the expansion is T 3 and the expansion ratio is ε . Write the expression for the heat addition in process 2-3. Q 23 = m c p ( T 3 − T 2 ) (IV) Here, the specific heat at constant process is c p and mass of the air is m . Conclusion: Refer to table A-20E “ideal gas Specific Heats of Some Common Gases” to obtain the specific heat of air at constant pressure and at constant volume and at temperature T 1 = 520 ° R as 0.240 Btu / lb ⋅ ° R and 0.171 Btu / lb ⋅ ° R respectively. Substitute 520 ° R for T 1 , 1.4 for γ and 17 for r c in Equation (I). T 2 520 ° R = ( 17 ) 1 (c) To determine The thermal efficiency of the cycle. (c) To determine The cutoff ratio.

Fundamentals of Engineering Thermodynamics

8th Edition

ISBN: 9781118832301

Author: SHAPIRO

Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT

See similar textbooks

Question

Chapter 9.14, Problem 23P

(a)

To determine

The heat addition.

(c)

To determine

The thermal efficiency of the cycle.

(c)

To determine

The cutoff ratio.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 9.14, Problem 22P

Chapter 9.14, Problem 24P

Students have asked these similar questions

This is an old practice exam. The answers are OAB = 19.10 ksi OBC = 2.228 ksi OCD = −2.865 ksi v = 0.2792delta Ltot = 0.01585 in (increase) but why

A random poly(styrene-butadiene) copoly- mer has a number-average molecular weight of 350,000 g/mol and a degree of polymerization of 5000. Compute the fraction of styrene and buta- diene repeat units in this copolymer. H H | | -C-C- 방 H

Design and assemble on the fluidsim (or a draft) the Hydraulic Drive Circuit, with the following characteristics: (a) Sequential operation, pressure, for the advance and return of the cylinders (according to the proper operation for the device) controlled by a directional 4x3 way, closed center; (b) Speed control for the cylinders, according to the load signal; (c) Pressure counterbalance for cylinder A, in order to compensate for the weight of the assembly.

Chapter 9 Solutions

Fundamentals of Engineering Thermodynamics

Ch. 9.14 - Prob. 1E Ch. 9.14 - Prob. 2E Ch. 9.14 - Prob. 3E Ch. 9.14 - Prob. 4E Ch. 9.14 - Prob. 5E Ch. 9.14 - 6. What is the purpose of a rear diffuser on a...Ch. 9.14 - 7. What is the meaning of the octane rating that...Ch. 9.14 - Prob. 8E Ch. 9.14 - Prob. 9E Ch. 9.14 - 10. What is the purpose of the gas turbine–powered...

Knowledge Booster