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 ...
52. Q ::. Average heat transfer rate QL ... Local heat transfer rate ql'1 :: Rate of mechanical heat input qNET :: Net heat tra.11.sfer rate through heat transfer s'tlrface :: Rate of heat input to batch :: Radius of vessel :: Radius of bob :: Radius of cup ~ :: Pulley radius (Dynrunometer) :t'R .,. Sum of all heat transfer resistances except batch resistance I:;Rc :: Sum of all heat transfer resistances except batch resistance in cooling cycle :: Sura of all heat transfer resista.nces except batch r r ~~ .. ~(~Cr S S T ~~ T" Tb Ts Ts :: :: ::: ... "" :: :: = :: :: resistance in heatine; cycle Value of radical coordinates Dliuensionless radius defined by eq. 3-38 Dlffiensionless radius defined by eq. 3-10 Dynamometer scale reading (lbs) Ratio of cup radius to bob radius, Rc/Rb Temperature at any point Dimensionless temperat'tITe defined by eq. 3-16 Temperature in bulk of fluid Torque Hall surface temperature
5..3 T,.J = Tempera tUre ax thermocouple .6T o ::: Temperature driving force betHeen batch and heat transfer mediu:m hTs-b = Temperature drop be~~een wall surface and batch A T w _ b ::: Temperature drop bet1rJeen measured point in wall and the batch l) T\:Ar_s = Temperature drop bet"reen measured point in ",raIl and wall surface ~Tl_2::: Change in temperature of batch over time interval 1-2 t " t'~ ~ U V V Vb Ve Vr Vr *. ·~,~it- Vr V z .. ~~ .. V z H 1'1' 'a T.:Jb = Time ::: Dliaensionless time defined eq. 3-15 ::: Terminal blend time (seconds) = Overall heat transfer coefficient = Average velocity in pipe or tube = Characteristic velocity = 11])& ::: Linear velocity of bob = Velocity in angular direction ::: Velocity in radial direction ::: Dimensionless Vr defined by eq. 3-39 = DL~ensionless Vr defined by eq. 3-12 ::: Velocity in vertical direction = Dimensionless V z defined by eq. 3-13 = Height of batch = Width of agitator = Width of baffles
- 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 .,;' : :: :::: : ~ !~. , " . .'
- Page 148 and 149: T." ••••••• ,_ .....
- Page 150 and 151: 38 the cooling of nitration liquors
- Page 152 and 153: 140 The average deviation of the me
- Page 154 and 155: 42 tween 0.25 and 0.58. L~~l had re
- Page 156 and 157: 144 transfer coefficients to non-Ne
- Page 158 and 159: 16 of fit and it may t...herefore b
- Page 160 and 161: 148 'tvas insufficient data to eval
- Page 162 and 163: 50 A ::: Apr ... B ::: C p ::: CPr
- Page 166 and 167: Xc = Function of Reynolds nL:l.m.be
- Page 168 and 169: IS6 G REE:>{ ALPHABET 0 ::: Value o
- Page 170 and 171: 158 coefficient. Thus, for the wate
- Page 172 and 173: 160 , ., I .. : I :. '. • • !.
- Page 174 and 175: 162 I , . I . "I '1 I i I 1 I 1· '
- Page 176 and 177: 64 ncr --~iIluto e torque of the in
- Page 178 and 179: 166 rive different temperatures; ab
- Page 180 and 181: 168 TABLE A-4. SLOPE OF "LOG SHEAR
- Page 182 and 183: TABLE 11.-5 RHEOLOGICAL DATA FOR CA
- Page 184 and 185: TABLE A-5 (eollt. ) /12 o . 24;;& C
- Page 186 and 187: '11 The flow behavior index and flu
- Page 188 and 189: i .f.C ·F s o 6 1 6 I
- Page 190 and 191: · . . . " , · . :::11" ': "'" ~ .
- Page 192 and 193: 180 Tke thermal e€l1'!ciluetlvity
- Page 194 and 195: 182 Heat capacity data for 100% gly
- Page 196 and 197: IB4- wkiek ex~resses the aensity e
- Page 198 and 199: 186 Ts - Torque X :: Peree~t 0~ ful
- Page 200 and 201: Phase I Calcu13tiJ~ of Slope of !oG
- Page 202 and 203: 3 REAL). N. ti •• D 4 cN=N E'I'
- Page 204 and 205: ~~-- ~---- --~--~ ~~~--------------
- Page 206 and 207: Phase IV Correlation of Flow Behavi
- Page 208 and 209: 96 HEAT TRANSFER DATA FOR WA'fER US
- Page 210 and 211: DATA /98 Batch \'ieight '" 94 •.
- Page 212 and 213: zoo Run Center Dia!!1ec;er Ri'M Are
52.<br />
Q ::. Average <strong>heat</strong> <strong>transfer</strong> rate<br />
QL ... Local <strong>heat</strong> <strong>transfer</strong> rate<br />
ql'1 :: Rate <strong>of</strong> mechanical <strong>heat</strong> input<br />
qNET :: Net <strong>heat</strong> tra.11.sfer rate through <strong>heat</strong> <strong>transfer</strong><br />
s'tlrface<br />
:: Rate <strong>of</strong> <strong>heat</strong> input to <strong>batch</strong><br />
:: Radius <strong>of</strong> vessel<br />
:: Radius <strong>of</strong> bob<br />
:: Radius <strong>of</strong> cup<br />
~ :: Pulley radius (Dynrunometer)<br />
:t'R .,. Sum <strong>of</strong> all <strong>heat</strong> <strong>transfer</strong> resistances except<br />
<strong>batch</strong> resistance<br />
I:;Rc :: Sum <strong>of</strong> all <strong>heat</strong> <strong>transfer</strong> resistances except <strong>batch</strong><br />
resistance in cooling cycle<br />
::<br />
Sura <strong>of</strong> all <strong>heat</strong> <strong>transfer</strong> resista.nces except <strong>batch</strong><br />
r<br />
r ~~<br />
.. ~(~Cr<br />
S<br />
S<br />
T<br />
~~<br />
T"<br />
Tb<br />
Ts<br />
Ts<br />
::<br />
::<br />
:::<br />
...<br />
""<br />
::<br />
::<br />
=<br />
::<br />
::<br />
resistance in <strong>heat</strong>ine; cycle<br />
Value <strong>of</strong> radical coordinates<br />
Dliuensionless radius defined by eq. 3-38<br />
Dlffiensionless radius defined by eq. 3-10<br />
Dynamometer scale reading (lbs)<br />
Ratio <strong>of</strong> cup radius to bob radius, Rc/Rb<br />
Temperature at any point<br />
Dimensionless temperat'tITe defined by eq. 3-16<br />
Temperature in bulk <strong>of</strong> fluid<br />
Torque<br />
Hall surface temperature
Change language