A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 10 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...

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... 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...

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... 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...

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... 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...

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... 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...

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... 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...

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... 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...

Ngày tải lên: 07/08/2014, 10:20

... 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...

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... 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...

Ngày tải lên: 07/08/2014, 10:20

... [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 (...

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... 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...

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... quite ac- curate and widely-used, semi-empirical equation for correlating surface 470 Heat transfer in boiling and other phase-change congurations Đ9 .2 Table 9 .2 Selected values of the surface ... 25 8 2. 80 25 5 2. 29 25 3 1.95 Isopropyl alcohol 10 to 100 22 .90 0.0789 Mercury 5 to 20 0 490.60 .20 49 Methane 90 18.877 100 16. 328 115 12. 371 Methyl alcohol 10 to 60 24...

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... 1 29 .3 304.4 1 096 35 0 231 5 895 .2 1 09. 0 112.5 30 4.1 1078 36 0 2 290 824.881. 891 .0 30 3.8 1054 37 3 2257 717.0 30 3 .3 1022 400 21 83 346 .9 30 2.4 94 5 500 1828 299 .2 39 1 600 11 73 295 .9 700 292 .3 T tp 2 73. 16 ... 8 ,95 4 38 4 39 8 11.57 4 83 420 401 39 1 38 9 38 4 37 8 36 6 35 2 33 6 DS-C15715 ∗ 8 ,90 0 38 4 36 5 ≈10.7 36 7 35 5 34 5 33 5 32 0...

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... Ambrazyavichyus (1961), 32 5, 32 6, 33 9 Žukauskas and Šlanciauskas (1987), 32 5, 32 6, 33 9 Žukauskas (1972), 38 2, 38 3, 39 5 Žukauskas (1987), 38 2, 39 6 726 Appendix C: Nomenclature E,E 0 voltage, initial voltage (V) e, ... 10 −24 yocto y 10 21 zetta Z 10 −21 zepto z 10 18 exa E 10 −18 atto a 10 15 peta P 10 −15 femto f 10 12 tera T 10 −12 pico p 10 9 gig...

Ngày tải lên: 07/08/2014, 10:20