80 N 60 4아 Pr= 1.25 1.6 2아1.5. Rep,max = 102 10 14 210 103 2.0 12 104 1.0 2105 1809
80 N 60 4아 Pr= 1.25 1.6 2아1.5. Rep,max = 102 10 14 210 103 2.0 12 104 1.0 2105 1809
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
Topic Video
Question
determine pressure drop

Transcribed Image Text:80
60
40-
Pr= 1.25
1.6
2아1.5.
Repmax = 10²
1.4
2105
10
103
6.
1.2
|2.0
104
10
1.0
102
2105
0.4
0.6 0,8 I
2.
0.8
0.6
0.4
2.5
0.2
Sp = Sr
3.5
0.1
4 6 810! 2 4 68102 2 4 6 810³ 2 4 6 8104 2 4 68 105 2
4 6 8106 2
Rep,max
(b) Staggered arrangement
Friction factor, f

Transcribed Image Text:Required information
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.8-
m-long tubes inside which the refrigerant is evaporating at -20°C. Air approaches the tube bank in the normal direction at
0°C and 1 atm with a mean velocity of 5 m/s. The tubes are arranged staggered with longitudinal and transverse pitches of
SI = ST = 1.5 cm. There are 25 rows in the flow direction with 15 tubes in each row. Assume the mean temperature as
-5°C and the properties of air at this temperature and 1 atm are (Table A-15) k= 0.02326 W/m-K, Cp= 1.006 kJ/kg-K, p=
1.316 kg/m3, Pr = 0.7375, µ = 1.705 × 10-5 kg/m-s, and Prs = Pra Ts =-20°C = 0.7408. Also, the density of air at the inlet
temperature of 0°C (for use in the mass flow rate calculation at the inlet) is pj = 1.292 kg/m³.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
0°C
1 atm
V m/s
0.8 m
Air
Sr= 1.5 cm
0.8 cm
S, = 1.5 cm/
Refrigerant, –20°C
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 7 steps

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