A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 4 potx

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 ContentsIV Thermal Radiation Heat Transfer 523 10 Radiative heat transfer 525 10 .1 The problem of radiative exchange 525 10 .2 Kirchhoff’s law 533 10 .3 Radiant heat exchange between ... LienhardPhlogiston Press ISBN 0-9 713 83 5-0 -2 PSB 0 1- 0 4-0 249 A HEAT TRANSFER TEXTBOOK THIRD EDITION John H. Lienhard IV / John H. Lienhard V A Heat Transfer Textbook Lienhard& Lienhard A...

A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 3 pptx

... parallel, black, opaque plates transfer heat byradiation, as shown in Fig. 1. 18. Find T2. 1. 15 Four inﬁnite, parallel, black, opaque plates transfer heat byradiation, as shown in Fig. 1. 19. ... electrical resistance heater,releasing 10 00 W/m2. Calculate (a) the heater temperature, (b)the heat transfer from the methanol to the heater, and (c) the heat transfer from the heater to the air. 1. 34 ... issued as class notes at the University of California atBerkeley between 19 32 and 19 41. [1. 3] M. Jakob. Heat Transfer. John Wiley & Sons, New York, 19 49. [1. 4] W. H. McAdams. Heat Transmission....

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 he= h + hrad= 18 .44 W/m2K. ... =∆TRttotal=T∞ 1 −T∞r 1 hA+ 1 kp A pL+ks A sL+ 1 hAandU =Q A T= 1 2h+ 1 kpL A p A +ksL A s A The approach illustrated in this example is very widely used in calcu-lating U values ... thetwo parallel resistances as follows: 1 Rtequiv= 1 Rtrad+ 1 Rtconv= Ahrad+Ah = A hrad+hThus,Requiv= 1 A hrad+h A calculation shows A = 13 3 mm2= 1. 33 ì 10 4 m2for...

A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 1 Part 5 doc

... with, we take U to be a constant value. This is fairly reasonablein 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 the99 Figure 3 .5 Typical commercial one-shell-pass, two-tube-pass heat exchangers. 10 4 ... a tube bundle. The plate-and-fin configura-tion (Fig. 3.6b) is such a cross-flow heat exchanger.In all of these heat exchanger arrangements, it becomes clear that a dramatic investment of human...

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 13 .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. Evaluate the exit tempera-tures if A ... The heat exchange surface for a steam genera-tor. This PFT-type integral-furnace boiler, with a surface areaof 4 560 m2, is not particularly large. About 88% of the areais in the furnace...

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 §4.4Figure 4.5 Heat conduction through a heat- generating slabwith 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.4One can always divide any variable by a conversion factor ... 14 8 Analysis of heat conduction and some steady one-dimensional problems §4.2Figure 4.3 A two-dimensional slab maintained at a constanttemperature on the sides and subjected to a sinusoidal varia-tion...

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 §4.5whereRtfin= 1 kAhP tanh mLfor a straight fin (4. 58) In general, for a fin of any shape, fin thermal resistance ... Ithasa2cmO.D. and a 1. 88 cm I.D. The material is type 304stainless steel. Assume that the fluid is steam at 260◦C andthat the heat transfer coefficient between the steam and thetube wall is ... Problems 18 3Problems4 .1 Make a table listing the general solutions of all steady, unidi-mensional constant-properties heat conduction problemns inCartesian, cylindrical and spherical coordinates,...

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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 conductionWe first consider a fairly ... t/T can be viewed astT=hk(V /A) tρc(V /A) 2k=h(V /A) k·αt(V /A) 2= Bi Fo (5.7)Electrical and mechanical analogies to thelumped-thermal-capacity problemThe term capacitance is adapted ... our attention, first, to an analysis of unsteady heat transfer, beginning with a more detailed consideration of the lumped-capacity system that we looked at in Section 1. 3.5.2 Lumped-capacity...

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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 0.99040.90 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 0.99600.60 0.70507 1. 0 814 0.9940 1. 018 44 1. 1345 0.9936 1. 26440 1. 1 713 0.99440.70 0.75056 1. 0 918 0.9922 1. 08725 1. 1539 0.9 916 1. 35252 1. 1978 0.99250.80 0.7 910 3 ... 0.9855 1. 10 0.89035 1. 1270 0.9839 1. 302 51 1.2232 0.9 815 1. 6 319 9 1. 2970 0.9828 1. 20 0. 917 85 1. 1344 0.9 817 1. 34558 1. 2387 0.9787 1. 68868 1. 32 01 0.9800 1. 30 0.94 316 1. 1 412 0.9794 1. 38543 1. 2533...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 1 doc

... [5.6] 13 . Isothermal ellipsoid of semimajoraxis b and semiminor axes a conducts heat into an infinitemedium 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 ( 1 − Φ 1 )= 0 .19 The mean temperature isΘ =T 20 10 0 − 20 = 1 −Φ = 0. 81 soT ... medium atT∞(see items 4 and 7)4πR 1 +R/2hmeter [5 .18 ]9. Parallel cylinders exchange heat inan infinite conducting medium 2 cosh 1 L 2 −R 2 1 −R 2 22R 1 R 2 none [5.6] 10 . Same as 9,...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 4 ppt

... transitionalvalue. Problems 3356.31 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 heaterat 60◦C. Find h, τw, 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 is suddenlytranslated ... W/m 2 ) were instead fixed at its average value of 76◦C, whatwould the average wall heat flux be?6 .26 A cold, 20 mph westerly wind at 20 ◦F cools a rectangular build-ing, 35 ft by 35 ft by 22 ...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 1 potx

... R -1 2 5 1. 10R -1 2 1. 50 R- 13 4a 1. 63 R-22 2.20 R -1 5 2a 1. 10R -3 2 1. 20 R- 41 0a 1. 72so thathfbhlo= fn(Bo, Co)(9.49)When the convection number is large (Co  1) , as for low quality,nucleate boiling ... 30 5.6kg/m2sandRelo=GDàf= (30 5.6)(0.05) 1. 297 × 10 −4= 1. 178 × 10 5From eqns. (7.42) and (7. 43) :f = 1  1. 82 log 10 (1. 178 ì 10 5) 1. 642= 0. 01 736 NuD=(0. 01 736 /8) 1. 178 ì 10 5 10 00(0.892) 1 + 12 .70. 01 736 /8(0.892)2 /3 1 = ... 5 01 Table 9.4 Fluid-dependent parameter F in the Kandlikar cor-relation for copper tubing. Additional values are given in [9.47].Fluid F Fluid FWater 1. 0 R -1 2 4 1. 90Propane 2 .15 R -1 2 5 1. 10R -1 2 ...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 2 potx

... 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 flowboiling heat transfer inside horizontal and vertical tubes. J. Heat Transfer, 1 12( 1) :21 9 22 8, 1990. §10 .3 Radiant heat exchange between two finite black ... Chen. A correlation for boiling heat transfer to saturatedfluids in convective flow. ASME Prepr. 6 3- HT -3 4 , 5th ASME-AIChE Heat Transfer Conf. Boston, August 19 63. [9.45] S. G. Kandlikar. A general...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 4 potx

... Thegeometrical mean beam length is defined asL0≡ 4 (volume of gas)boundary area that is irradiated(10. 54) Thus, for two infinite parallel plates a distance  apart, L0= 4A / 2A =2. Some other values ... net heat transfer is calculated using the surface area ofthe wall:Qnetg-w= A wgT 4 ggT 4 w= (0 .4) (5.67 ì 108)(0.098)( 14 73) 4 (0.12)(5 73) 4 = 32 kW/mTotal emissivity charts and ... Solar radiation usually arrives at an angleof less than 90◦to the surface because the sun is rarely directly overhead.We have seen that a radiant heat flux arriving at an angle less than 90◦is...

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