A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 8 pps
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 1 pdf
... 627
11 .6 Mass transfer at low rates 635
11 .7 Steady mass transfer with counterdiffusion 648
11 .8 Mass transfer coefficients at high rates of mass transfer . 654
11 .9 Simultaneous heat and mass transfer ... the right pass
x Contents
IV Thermal Radiation Heat Transfer 523
10 Radiative heat transfer 525
10 .1 The problem of radiative exchange 525
10 .2 Kirchhoff’s la...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 3 pptx
... parallel, black, opaque plates transfer heat by
radiation, as shown in Fig. 1. 18. Find T
2
.
1. 15 Four infinite, parallel, black, opaque plates transfer heat by
radiation, as shown in Fig. 1. 19. ... electrical resistance heater,
releasing 10 00 W/m
2
. Calculate (a) the heater temperature, (b)
the heat transfer from the methanol to the heater, and (c) the
heat transfer f...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 4 potx
... with weather data to estimate heating and cooling loads [2.5].
78 Heat conduction, thermal resistance, and the overall heat transfer coecient Đ2 .4
transfer coecient h
e
= h + h
rad
= 18 .44 W/m
2
K. ... =
∆T
R
t
total
=
T
∞
1
−T
∞
r
1
hA
+
1
k
p
A
p
L
+
k
s
A
s
L
+
1
hA
and
U =
Q
A T
=
1
2
h
+
1
k
p
L
A
p
A
+
k
s
L
A
s
A
The approach illustrated in...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 5 doc
... with, we take U to be a constant value. This is fairly reasonable
in compact single-phase heat exchangers. In larger exchangers, particu-
larly in shell-and-tube configurations and large condensers, ... conguration. Figure 3 .5 shows the U-tubes of
a two-tube-pass, one-shell-pass exchanger being installed in the
99
Figure 3 .5 Typical commercial one-shell-pass, two-tube-pass
heat ex...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 6 ppt
... multipass shell-
and-tube heat exchangers and one-pass cross-flow exchangers.
11 9
a. F for a one-shell-pass, four, six-, tube-pass exchanger.
b. F for a two-shell-pass, four or more tube-pass exchanger.
Figure ... (Data provided by A. D. Krauss.)
12 4
Problems 13 1
3 .13 Air at 2 kg/s and 27
◦
C and a stream of water at 1. 5 kg/s and
60
◦
C each enter a heat exchanger. E...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 7 pot
... 0
(4.9)
16 0 Analysis of heat conduction and some steady one-dimensional problems §4.4
Figure 4.5 Heat conduction through a heat- generating slab
with asymmetric boundary conditions.
Example 4 .7
A slab ... gravitational forces. Fr is about 10 00 for a pitched baseball,
and it is between 1 and 10 for the water flowing over the spillway of
a dam.
4
One can always divide any...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 8 pps
... section.
18 2
17 8 Analysis of heat conduction and some steady one-dimensional problems §4.5
where
R
t
fin
=
1
kAhP tanh mL
for a straight fin (4. 58)
In general, for a fin of any shape, fin thermal resistance ... It
hasa2cmO.D. and a 1. 88 cm I.D. The material is type 304
stainless steel. Assume that the fluid is steam at 260
◦
C and
that the heat transfer coefficient betwe...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 9 ppt
... briefly at the dimensional analysis of transient con-
duction in general and of lumped-capacity systems in particular.
Dimensional analysis of transient heat conduction
We first consider a fairly ... t/T can be viewed as
t
T
=
hk(V /A) t
ρc(V /A)
2
k
=
h(V /A)
k
·
αt
(V /A)
2
= Bi Fo (5.7)
Electrical and mechanical analogies to the
lumped-thermal-capacity problem
The term capacitance is...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 10 pdf
... 0.7 910 3 1. 1 016 0.9903 1. 14897 1. 1724 0.9893 1. 43203 1. 2236 0.9904
0.90 0.82740 1. 110 7 0.9882 1. 20484 1. 1902 0.9869 1. 50442 1. 2488 0.9880
1. 00 0.86033 1. 119 1 0.98 61 1.25578 1. 20 71 0.9843 1. 57080 1. 2732 ... 0.94077 1. 114 3 0.9954 1. 16556 1. 14 41 0.9960
0.60 0.70507 1. 0 814 0.9940 1. 018 44 1. 1345 0.9936 1. 26440 1. 1 713 0.9944
0.70 0.75056...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 1 doc
... [5.6]
13 . Isothermal ellipsoid of semimajor
axis b and semiminor axes a
conducts heat into an infinite
medium at T
∞
; b> ;a( see 4)
4πb
1 a
2
b
2
tanh
1
1 a
2
b
2
meter [5 .16 ]
24 6
26 2 ... 5 .1 0a
Φ
1
(
Fo
1
= 0.565, Bi
1
= 0 . 21 05
)
= 0 .10
Φ
2
(
Fo
2
= 0.565, Bi
2
= 0 . 21 05
)
= 0 .10
and, with eqn. (5.7 3a) ,
Φ = Φ
1
+Φ
2
(...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 8 docx
... by Fujii and Imura [8. 16], Vliet [8. 17], Pera and
Gebhart [8. 18] , and Al-Arabi and El-Riedy [8. 19], among others.
8. 5 Film condensation 431
on the same basis. The integration of eqn. (8. 47) subject ... 434 Natural convection in single-phase fluids and during film condensation 8. 5
Figure 8. 12 Results of the exact b.l. analysis of laminar film
condensation on a vertical plate [8. 36]...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 1 potx
... R -1 2 5 1. 10
R -1 2 1. 50 R- 13 4a 1. 63
R-22 2.20 R -1 5 2a 1. 10
R -3 2 1. 20 R- 41 0a 1. 72
so that
h
fb
h
lo
= fn
(
Bo, Co
)
(9.49)
When the convection number is large (Co 1) , as for low quality,
nucleate boiling ... 30 5.6kg/m
2
s
and
Re
lo
=
GD
à
f
=
(30 5.6)(0.05)
1. 297 × 10
−4
= 1. 178 × 10
5
From eqns. (7.42) and (7. 43) :
f =
1
1. 82 log
10
(1. 178...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 8 pps
... tempera-
ture. We may evaluate h
∗
and g
∗
m,i
in the same way when heat and mass
transfer occur simultaneously. If composition variations are not large,
as in many low-rate problems, it may be adequate to ... when
more than one species is transferred?
§11.9 Simultaneous heat and mass transfer 667
Stagnant film model of heat transfer at high mass transfer rates
The multicomponen...
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