... 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...
... 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...
... transitional
value.
Problems 335
6.31 A thin metal sheet separates air at 44
◦
C, flowing at 48 m/s,
from water at 4
◦
C, flowing at 0.2m/s. Both fluids start at a
leading edge and move in the same ... at 25
◦
C flows at 0.7m/s over a 4 cm-long flat heater
at 60
◦
C. Find h, τ
w
, h(x = 0. 04 m), and δ(x = 0. 04 m).
6 .20 A large plate is at rest in water at 15
◦
C. The plate i...
... and J. P. Hart-
nett, editors, Advances in Heat Transfer, volume 6, pages 50 4 56 4.
Academic Press, Inc., New York, 1970.
[6.14] A. A. Žukauskas and A. B. Ambrazyavichyus. Heat transfer from
a ... that of predicting
laminar convection in a pipe.
7 .2 Heat transfer to and from laminar flows in pipes
Not many industrial pipe flows are laminar, but laminar heating and cool-
in...
... fins of a heat exchanger may form a rect-
angular passage through which air flows. Sometimes, the passage cross-
section is very irregular, as might happen when fluid passes through a
clearance between ... situations, but all must be viewed critically.
Many are based on limited data, and many incorporate systematic errors
of one kind or another.
In the face of a heat transfer situa...
... 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]...
... on
natural convection heat transfer from a horizontal plates. Int. J.
Heat Mass Transfer, 17(1):135–1 42, 197 4.
458 Heat transfer in boiling and other phase-change congurations 9. 1
Figure 9. 1 ... Natural convection heat transfer from a
plate with arbitrary inclination. Int. J. Heat Mass Transfer, 15(4):
755–767, 19 72.
[8.17] G. C. Vliet. Natural convection local...
... Int. J. Heat Mass Transfer, 13: 1 425 –1 439 ,
1970.
[9. 23 ] J. S. Ded and J. H. Lienhard. The peak pool boiling heat flux from
a sphere. AIChE J., 18 (2) :33 7 34 2, 19 72.
[9 .24 ] A. L. Bromley. Heat transfer ... correlation for saturated two-phase flow
boiling heat transfer inside horizontal and vertical tubes. J. Heat
Transfer, 1 12( 1) :21 9 22 8, 1990.
§10 .3 Radi...