A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 5 pot

... 1.42×10 5 air-ethanol 31 3 1. 45 air-helium 276 6.24 air-napthalene 30 3 0.86 air-water 31 3 2.88 argon-helium 2 95 8 .3 628 32 .1 1068 81.0 (dilute solute, 1 )-( liquid solvent, 2) T (K) D 12 (m 2 /s) ethanol-benzene ... D 12 (m 2 /s) ethanol-benzene 288 2. 25 10 −9 benzene-ethanol 298 1.81 water-ethanol 298 1.24 carbon dioxide-water 298 2.00 ethanol-water 288 1.00 methane-water 2...

Ngày tải lên: 07/08/2014, 10:20

... tubing. Additional values are given in [9.47]. Fluid F Fluid F Water 1.0 R-124 1.90 Propane 2. 15 R-1 25 1.10 R-12 1 .50 R- 13 4a 1. 63 R-22 2.20 R- 15 2a 1.10 R -3 2 1.20 R-41 0a 1.72 so that h fb h lo = ... slug flow and annular flow (D, E, and F) the heat transfer mechanism changes substantially. Nucleation is increasingly suppressed, and vapor- ization takes place mainly at the...

Ngày tải lên: 07/08/2014, 10:20

... Chen. A correlation for boiling heat transfer to saturated fluids 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 ... 9.3d. 9 .30 Water at 47 ◦ C flows through a 13 cm diameter thin-walled tube at8m/s. Saturated water vapor, at 1 atm, flows across the tube at 50 m/s. Evaluate T tube , U, an...

Ngày tải lên: 07/08/2014, 10:20

... properties. 57 8 Radiative heat transfer §10.6 Table 10.4 Solar absorptance and infrared emittance for sev- eral surfaces near 30 0 K [10.4, 10. 15] . Surface α solar ε IR Aluminum, pure 0.09 0.1 Carbon black ... with an inside diameter of 5 cm, has a black cap on one end and a cap with 57 6 Radiative heat transfer §10.6 45% reaches the earth’s surface 45% is transmitted...

Ngày tải lên: 07/08/2014, 10:20

... body exchange, 53 4 – 53 6 electrical analogy, 54 9 55 9 with a specified wall flux, 55 6 with an adiabatic surface, 55 6 infrared radiation, 27–28 intensity, 53 1 – 53 3 Kirchhoff’s law, 53 3 – 53 6 monochromatic ... velocity, 34 3 entry length laminar hydrodynamic, 34 7 laminar thermal, 35 1 35 2 turbulent, 35 5 35 6 friction factor laminar flow, 35 9 turbulent flow, 35 8 36 4 f...

Ngày tải lên: 07/08/2014, 10:20

... radiation — a black body. Figure 10.9 The view factors for configurations shown in Table 10 .3 54 5 §10 .5 Gaseous radiation 5 63 = (0 .5)  0. 15 0. 85  (5. 67 ×10 −8 ) ×  (37 3) 4 −0. 232 (37 3) 4 +0 .31 9(7 73) 4 −0.447(7 73) 4  W/m =− 154 .3W/m The ... 10.2 A heater (h) as shown in Fig. 10.11 radiates to the partially conical shield (s) that surrounds it. If the heater...

Ngày tải lên: 07/08/2014, 10:20

... 1 .32 0 1. 452 4 .50 0.8610 0.9464 1. 25 1.296 1.424 4.60 0. 856 8 0.9422 1 .30 1.2 73 1 .39 9 4.70 0.8 53 0 0. 938 2 1 . 35 1.2 53 1 .37 5 4.80 0.8492 0. 934 3 1.40 1. 233 1 . 35 3 4.90 0.8 456 0. 930 5 1. 45 1.2 15 1 .33 3 5. 00 ... H 2 2.827 59 .72.016 Air 3. 711 78.628.96 H 2 O2. 655 a 36 3 a 18.02 Ar 3. 54 2 93. 339 . 95 H 2 O2.641 b 809.1 b Br 2 4.296 50 7.9 159 .8H...

Ngày tải lên: 07/08/2014, 10:20

... the analogy between heat transfer and low-rate mass transfer may be used directly to adapt natural convection heat transfer predictions to natural convection mass transfer. As before, we replace ... possi- bilities in turn. Heat transfer at low rates of mass transfer One very common case of low-rate heat and mass transfer is the evapora- tion of water into air at low or m...

Ngày tải lên: 07/08/2014, 10:20

... balances in simultaneous heat and mass transfer Transpiration cooling. To calculate simultaneous heat and mass trans- fer rates, one must generally look at the energy balance below the wall as well ... 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,...

Ngày tải lên: 07/08/2014, 10:20

... 1010 †† 7, 830 434 64 1.88 70 65 61 55 50 45 36 29 0 .5% carbon 7, 833 4 65 54 1.47 55 52 48 45 42 35 31 29 1.0% carbon 7,801 4 73 43 1.17 43 43 42 40 36 33 29 28 1 .5% carbon 7,7 53 486 36 0.97 36 36 36 35 33 ... 8, 954 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-C 157 15 ∗ 8,900 38 4 36 5 ≈10.7 36 7 35 5 34 5 33 5 32 0...

Ngày tải lên: 07/08/2014, 10:20