(b) Figure 2.1 shows a double-pipe heat exchanger is constructed of a stainless steel (k =15.1 W/m.°C) inner tube of inner diameter D; = 1.5 cm and outer diameter Do = 1.9 cm and an outer shell of inner diameter 3.2cm. The convection heat transfer coefficient is given to be hi = 800 W/m².°C on the inner surface of the tube and ho = 1200 W/m².°C on the outer surface. For a fouling factor of Rf, i = 0.0004 m².°C/W on the tube side and Rf, 0 = 0.0001 m².°C/W on the shell side. Given the length of the tube is 10 m. [Rajah 5.1 menunjukkan penukar haba dua paip dibina daripada keluli tahan karat (k =15.1 W/m.°C) tiub dalam diameter dalam Dị = 1.5 cm dan diameter luar D, = 1.9 cm dan kelompang luar diameter dalam 3.2 cm. Pekali pemindahan haba perolakan diberi sebagai h; = 800 W/m².°C pada permukaan dalam tiub dan ho = 1200 W/m2-°C pada permukaan luar. Untuk faktor kotoran Rf, i = 0.0004 m².ºC/W pada bahagian tiub dan Rf 0 = 0.0001 m²?.°C/W pada bahagian kelompang. Diberi panjang tiub itu ialah 10 m.] (i) Calculate the lateral surface area of the inner and outer tube. [Kirakan luas permukaan sisi tiub dalam dan luar.] (ii) Determine the thermal resistance of the heat exchanger per unit length. [Tentukan rintangan haba penukar haba per unit panjang.] Cold fluid Cold fluid Hot fluid Outer layer of fouling - Tube wall - Inner layer of fouling Inner surface of tube Hot fluid Outer surface of tube Figure 2.1
(b) Figure 2.1 shows a double-pipe heat exchanger is constructed of a stainless steel (k =15.1 W/m.°C) inner tube of inner diameter D; = 1.5 cm and outer diameter Do = 1.9 cm and an outer shell of inner diameter 3.2cm. The convection heat transfer coefficient is given to be hi = 800 W/m².°C on the inner surface of the tube and ho = 1200 W/m².°C on the outer surface. For a fouling factor of Rf, i = 0.0004 m².°C/W on the tube side and Rf, 0 = 0.0001 m².°C/W on the shell side. Given the length of the tube is 10 m. [Rajah 5.1 menunjukkan penukar haba dua paip dibina daripada keluli tahan karat (k =15.1 W/m.°C) tiub dalam diameter dalam Dị = 1.5 cm dan diameter luar D, = 1.9 cm dan kelompang luar diameter dalam 3.2 cm. Pekali pemindahan haba perolakan diberi sebagai h; = 800 W/m².°C pada permukaan dalam tiub dan ho = 1200 W/m2-°C pada permukaan luar. Untuk faktor kotoran Rf, i = 0.0004 m².ºC/W pada bahagian tiub dan Rf 0 = 0.0001 m²?.°C/W pada bahagian kelompang. Diberi panjang tiub itu ialah 10 m.] (i) Calculate the lateral surface area of the inner and outer tube. [Kirakan luas permukaan sisi tiub dalam dan luar.] (ii) Determine the thermal resistance of the heat exchanger per unit length. [Tentukan rintangan haba penukar haba per unit panjang.] Cold fluid Cold fluid Hot fluid Outer layer of fouling - Tube wall - Inner layer of fouling Inner surface of tube Hot fluid Outer surface of tube Figure 2.1
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
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HEAT TRANSFER SUBJECT
![(b)
Figure 2.1 shows a double-pipe heat exchanger is constructed of a stainless steel (k
=15.1 W/m.°C) inner tube of inner diameter D; = 1.5 cm and outer diameter Do = 1.9
cm and an outer shell of inner diameter 3.2cm. The convection heat transfer coefficient
is given to be h; = 800 W/m².°C on the inner surface of the tube and ho = 1200 W/m²-°C
on the outer surface. For a fouling factor of Rf, i = 0.0004 m?.°C/W on the tube side and
Rf.0 = 0.0001 m².°C/W on the shell side. Given the length of the tube is 10 m.
[Rajah 5.1 menunjukkan penukar haba dua paip dibina daripada keluli tahan karat (k =15.1 W/m.°C)
tiub dalam diameter dalam D; = 1.5 cm dan diameter luar D. = 1.9 cm dan kelompang luar diameter
dalam 3.2 cm. Pekali pemindahan haba perolakan diberi sebagai h; = 800 W/m?.°C pada permukaan
dalam tiub dan ho = 1200 W/m2-°C pada permukaan luar. Untuk faktor kotoran Rf, i = 0.0004 m².ºC/W
pada bahagian tiub dan Rf.0 = 0.0001 m².ºC/W pada bahagian kelompang. Diberi panjang tiub itu ialah
10 m.]
(i) Calculate the lateral surface area of the inner and outer tube.
[Kirakan luas permukaan sisi tiub dalam dan luar.]
(ii) Determine the thermal resistance of the heat exchanger per unit length.
[Tentukan rintangan haba penukar haba per unit panjang.]
Cold fluid
Cold fluid
Hot
Outer layer of fouling
fluid
-Tube wall
Inner layer of fouling
Inner surface of tube
Hot
fluid
Outer surface of tube
Figure 2.1](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdb01d844-fd23-484b-ae0c-8e8c4aa81434%2F4c400876-31a1-4dc7-9927-95626bf0ed10%2Fe30c0ah_processed.png&w=3840&q=75)
Transcribed Image Text:(b)
Figure 2.1 shows a double-pipe heat exchanger is constructed of a stainless steel (k
=15.1 W/m.°C) inner tube of inner diameter D; = 1.5 cm and outer diameter Do = 1.9
cm and an outer shell of inner diameter 3.2cm. The convection heat transfer coefficient
is given to be h; = 800 W/m².°C on the inner surface of the tube and ho = 1200 W/m²-°C
on the outer surface. For a fouling factor of Rf, i = 0.0004 m?.°C/W on the tube side and
Rf.0 = 0.0001 m².°C/W on the shell side. Given the length of the tube is 10 m.
[Rajah 5.1 menunjukkan penukar haba dua paip dibina daripada keluli tahan karat (k =15.1 W/m.°C)
tiub dalam diameter dalam D; = 1.5 cm dan diameter luar D. = 1.9 cm dan kelompang luar diameter
dalam 3.2 cm. Pekali pemindahan haba perolakan diberi sebagai h; = 800 W/m?.°C pada permukaan
dalam tiub dan ho = 1200 W/m2-°C pada permukaan luar. Untuk faktor kotoran Rf, i = 0.0004 m².ºC/W
pada bahagian tiub dan Rf.0 = 0.0001 m².ºC/W pada bahagian kelompang. Diberi panjang tiub itu ialah
10 m.]
(i) Calculate the lateral surface area of the inner and outer tube.
[Kirakan luas permukaan sisi tiub dalam dan luar.]
(ii) Determine the thermal resistance of the heat exchanger per unit length.
[Tentukan rintangan haba penukar haba per unit panjang.]
Cold fluid
Cold fluid
Hot
Outer layer of fouling
fluid
-Tube wall
Inner layer of fouling
Inner surface of tube
Hot
fluid
Outer surface of tube
Figure 2.1
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