18.7 21.4 24.4 30.2 37.9 44.5
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
Related questions
Question

Transcribed Image Text:53.1
64.4
68.6
489
523
atio of 3 (i.e 581
613
659
ge turbine
ir is 10 bar
reases its t
which increa
ssure ratio
18.7
21.4
24.4
30.2
37.9
44.5
= 0.287 kJ/k
683
711
744
773
808
er system as foll
re of the air is 4
K.
> first turbine ha
e back up to 90
pic efficiency of
!) in kW:
12
>erfectly isentropic (i.e. T') in K:

Transcribed Image Text:Compressed air with a flowrate of 6 kg/min flows through a two-stage turbine and heat exchanger system as follows:
• At the entrance to the system (point 1), the pressure of the air is 10 bar and the temperature of the air is 459 K.
• From 1-2 the air passes through a heat exchanger which increases its temperature to 902 K.
• From 2-3 the air passes through a turbine, with a pressure ratio of 3 (i.e. P₂/P₂²
p=3). This first turbine has an isentropic efficiency of 65%.
• From 3-4 the air passes through a second heat exchanger, which increases its temperature back up to 902 K.
• From 4-5 the air passes through a second turbine with a pressure ratio of 3 and an isentropic efficiency of 90%.
The properties of air are: cp = 1.005 kJ/kgK, cv = 0.718 kJ/kgK, R = 0.287 kJ/kgK, and y = 1.4.
Select the correct value for each of the following values:
a. The heat transfer to the air in the first heat exchanger (i.e. Q) in kW:
12
b. The temperature of the air leaving the first turbine if it were perfectly isentropic (i.e. T¹_ ) in K:
3
c. The actual temperature of the air leaving the first turbine (i.e. T)in K:
d. The actual temperature of the air leaving the second turbine (i.e. T_¸) in K:
e. The magnitude of the net rate of work transfer from the system in kW:
f. The change in specific entropy of the air between the start and end of the system in J/kgK:
<
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step 1: Write Bartleby QnA Guidelines to post the answer.
VIEWStep 2: Write the given data with suitable variables.
VIEWStep 3: (a) - Determine the value of heat transfer to the air in first heat exchanger.
VIEWStep 4: (b)- Find the value temperature of air leaving the first turbine.
VIEWStep 5: (c) - Determine the value of actual temperature of air leaving the first turbine
VIEWSolution
VIEWStep by step
Solved in 6 steps with 16 images

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.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