Prediction of batch heat transfer coefficients for pseudoplastic fluids ...
Prediction of batch heat transfer coefficients for pseudoplastic fluids ... Prediction of batch heat transfer coefficients for pseudoplastic fluids ...
86 TABLE 4.-3 IHPELIJER DI1'lENSIONS __ '* 1 Diameter ~inches) \vidth or hei&h.t (inches) Anchor Disk ~Dd (6 bladed) Vane Ttu~bine 9.0 L~ .. 0 5.0 6 .. 0 7.0 Open straight blade turbine 4.0 Open reversing blade turbine 4.0 Open retreating blade turbine 4.0 Paddles 4.0 l~. 0 5.0 5.0 5.0 6.0 6.0 7.0 7,,0 7.0 8.0 8 .. 0 8.0 6 0.75 1.0 1.25 1 .. 375 0.75 0.50 0.50 1.0 2 .. 0 1 .. 0 1 .. 5 2.0 1.0 2 .. 0 1.0 2.0 3 .. 0 1.0 2.0 4-.0 Reverse pitch paddle 9.0 0.7 Propellers 4.1 } 5.2"'
11 Wa.ll (Mi€1dl~) Same as #5 81 12 Bateh. (Middle) Same as #0 The ahove €o~diti0~S a~~ly t@ all tke water rtlns. Whe~ usimg m0re viSCGUS flui€is seme vaFiati0nl im '!;,Jall temperat1ltre was Boted and tke tkermocouple panel was modified so that the taree wall therm.oeouples were eenneeted. Thus fer all runs after run number 185 the ten~erature points 3, 5, 9 ane! 11 record the average of' the three wall temperatures lIDO. :not the mdividual posi tioRs as give~ abcnre .. Before the therr~oeouples were metalled they were connected to 'the recorder and calibrated. They were placed in iee water; a 25°c co~stant tem~erature bath, and boilimg water. At all three temperatures the system reeorded the exaet temperature, pr0vided the recorder was 1tJarrl1ed up for f'ifteen m±nutes prior to measuring the temperature. I~ all the heat transf'er runs the reeoraer was therefore wa~led up f'ar thirty minutes before data was takem. The chart speed used was 0.5 mcnes per winute although 1, 2, 4 and 5 inches per minute were also available at the flick of a switch. The three wall-temperature ther.mocouples gave sligatly tiiifferent temperatures at the Glifferent l@catiems. It was found that the vertical loeation of the impeller was a large faetor in the matnitude of the deviati6ns. T.me impeller p0sitiens listed in Table 5-1 were exper~entally determ~e~
- Page 47 and 48: JS Thermometers or thermocouples ar
- Page 49 and 50: .37 2: a in in heat cQ@tent of the
- Page 51 and 52: J9 cooling mediu..:m side, the heat
- Page 53 and 54: 41 ports a value of 3/4-.. He then
- Page 55 and 56: 43 find the effects of one or two o
- Page 57 and 58: 45 The group to the left of the equ
- Page 59 and 60: 47 the highest heat tra...nsfer coe
- Page 61 and 62: 49 A pitched blade turbine gave coe
- Page 63 and 64: SI done on the correlation of heat
- Page 65 and 66: 5J evaluated at the wall temperatur
- Page 67 and 68: ss to (2-46 where ill is the consis
- Page 69 and 70: CHAPTER .2 DEVELOPMENT OF CORRELATI
- Page 71 and 72: momentum" mass" and energy may be ~
- Page 73 and 74: 61 Vr;> Jt.- ,,"Ii'\... ..", ::: (V
- Page 75 and 76: 63 Substitution of these dimensionl
- Page 77 and 78: l/(R + 1) and was able t@ elim.iE.a
- Page 79 and 80: 67 All of the variables and differe
- Page 81 and 82: 69 The average heat transfer coeffi
- Page 83 and 84: N"v = C Iv''' (;';~-"')&'i'~ (%t-n,
- Page 85 and 86: 73 Semi-Empirical Correlation i ..,
- Page 87 and 88: 75 7I1C1?/lfOCOUPLc .JuNe T/ON IMBE
- Page 89 and 90: 77 _I"---- / SCALE I ~~, .5 j t /Z.
- Page 91 and 92: also cop~ected to the pipes leading
- Page 93 and 94: 81 Ve8sel :J all th:l c]me 8 8 .) '
- Page 95 and 96: 83 potentiometer for varing the mot
- Page 97: 85 MATERIAL 7:0 STAIIJLESS STEEL /
- Page 101 and 102: 89 shea.r ra.tes, tl?1ey a.re unaff
- Page 103: and if' lO"V'l$' a sm.all amount of
- Page 106 and 107: 94- was about 40-45 ndmutes .. Tke
- Page 108 and 109: 96 vThere N is in rev./sec .. and S
- Page 110 and 111: 88 ql\fETI A = 6 T \--T -s L/kw (1+
- Page 112 and 113: I {)D The generalized Reynolds n~mb
- Page 114 and 115: 02. CHAPTER !2. RESUI,TS Many heat
- Page 116 and 117: 01 TABLE 5-2 sutn~U{Y OF ADDITIONAL
- Page 118 and 119: 108 the batch than the other ticJO
- Page 120 and 121: 108 optimum impeller heights were u
- Page 122 and 123: 10 I r "'" , •• ,'., "",' """",
- Page 124 and 125: 112 correlations for the prediction
- Page 126 and 127: TABLE 5 - 4 Correlation Constants A
- Page 128 and 129: 1/6 Table 5-5 and 5-6. A measure of
- Page 130 and 131: TABLE S - 6 IMPELLER Correlation Co
- Page 132 and 133: 120 greater than 2.0. In this case
- Page 134 and 135: 12.2
- Page 136 and 137: TABLE 5 - 9 CORRELATION E t (a/n +1
- Page 138 and 139: TABLE 5 - 10 IMPELLER Correlation C
- Page 140 and 141: TABLE 5 - 11 CORRELATION G (1.30/61
- Page 142 and 143: 1.30 of the substantial improvement
- Page 144 and 145: 1.3 2. The probable error in the ca
- Page 146 and 147: 134 .,;' : :: :::: : ~ !~. , " . .'
86<br />
TABLE 4.-3<br />
IHPELIJER DI1'lENSIONS<br />
__ '* 1<br />
Diameter<br />
~inches)<br />
\vidth or hei&h.t<br />
(inches)<br />
Anchor<br />
Disk ~Dd<br />
(6 bladed)<br />
Vane Ttu~bine<br />
9.0<br />
L~ .. 0<br />
5.0<br />
6 .. 0<br />
7.0<br />
Open straight blade turbine 4.0<br />
Open reversing blade turbine 4.0<br />
Open retreating blade turbine 4.0<br />
Paddles 4.0<br />
l~. 0<br />
5.0<br />
5.0<br />
5.0<br />
6.0<br />
6.0<br />
7.0<br />
7,,0<br />
7.0<br />
8.0<br />
8 .. 0<br />
8.0<br />
6<br />
0.75<br />
1.0<br />
1.25<br />
1 .. 375<br />
0.75<br />
0.50<br />
0.50<br />
1.0<br />
2 .. 0<br />
1 .. 0<br />
1 .. 5<br />
2.0<br />
1.0<br />
2 .. 0<br />
1.0<br />
2.0<br />
3 .. 0<br />
1.0<br />
2.0<br />
4-.0<br />
Reverse pitch paddle 9.0 0.7<br />
Propellers<br />
4.1 }<br />
5.2"'
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