Heat transfer coefficients in coiled stirred‐tank systems

Aksan, Devlet; Borak, Fahir; Önsan, Z. İlsen

doi:10.1002/cjce.5450650618

Cited by 4 publications

(6 citation statements)

References 4 publications

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“…(A) Parity plot of experimental heat transfer coefficient versus predicted heat transfer coefficient using correlation given by Aksan et al 13 for the correlation

\frac{h_{c} T}{k} = 1.4 R^{0.62} \Pr^{0.33} {(\frac{µ}{µ_{w}})}^{0.14}

for flat blade paddle . (B) Parity plot of experimental heat transfer coefficient vs predicted heat transfer coefficient using correlation given by Appleton and Brennan 9 for the correlation

\frac{h_{c} d}{k} = 0.60 R^{0.58} \Pr^{0.37} {(\frac{D}{T})}^{0.1} {(\frac{d}{T})}^{0.5}

for pitched blade turbine downflow (PBTD).…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Parity plot of experimental heat transfer coefficient versus predicted heat transfer coefficient using correlation given by Aksan et al 13 for the correlation ( ) cannot account for the complex interaction of all the affecting parameters and the experimental conditions in any single investigation do not cover the entire input data range.…”

Section: Comparison Between Classical Correlations and Ai Methodsmentioning

confidence: 99%

“…They explained that this modified Reynolds number is useful for the development of empirical correlations. Aksan et al 13 (six‐blade paddle and water as fluid). Kizilcec et al 14 determined the HTC for a finned‐coil stirred tank (six blade paddle and water).…”

Section: Previous Workmentioning

confidence: 99%

“…Effect of Reynold's number on heat transfer coefficient, experimental and RFC predictions for Aksan et al13 flat blade paddle, D/T = 0.4, C/T = 0.33, D c /T = 0.8, d/T = 0.03, Re = 20,000-80,000, Pr = 6 F I G U R E 1 2 Effect of Re on heat transfer coefficient, experimental and RF predictions for baffled systems Appleton and Brennan 9 and unbafled systems 6 for flat bladed paddle, Pr = 6, D/T = 0.33-0.6, d/T = 0.04, D c /T = 0.66-0.81, C/T = 0.33…”

mentioning

confidence: 99%

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Artificial intelligence‐based correlation: Process side heat transfer coefficient for helical coils in stirred tank reactors

Moholkar

Vala²,

Mathpati

et al. 2021

Heat Trans

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Stirred tank reactor systems often employ jackets/ limpets, single/multiple internal coils for heat transfer. Internal coils are used for heat removal in the case of exothermic reaction systems. The desired heat transfer area can be accurately estimated based on the overall heat transfer coefficient (HTC) considering the process side, utility side, and wall conduction resistance. For estimation of process side HTC, a large number of empirical/semi-empirical correlations are available in the published literature. These correlations account for impeller Reynolds number, fluid Prandtl number, viscosity ratio, dimensionless geometric factors, and so forth. However, all the factors over the entire range of industrial operation do not get covered in a single study, hence the predictions may involve significant errors for industrial cases. The advanced artificial intelligence-based techniques can provide unified correlation based on the experimental data set extracted from various investigations and the predictions can be accurate and

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“…(A) Parity plot of experimental heat transfer coefficient versus predicted heat transfer coefficient using correlation given by Aksan et al 13 for the correlation

\frac{h_{c} T}{k} = 1.4 R^{0.62} \Pr^{0.33} {(\frac{µ}{µ_{w}})}^{0.14}

for flat blade paddle . (B) Parity plot of experimental heat transfer coefficient vs predicted heat transfer coefficient using correlation given by Appleton and Brennan 9 for the correlation

\frac{h_{c} d}{k} = 0.60 R^{0.58} \Pr^{0.37} {(\frac{D}{T})}^{0.1} {(\frac{d}{T})}^{0.5}

for pitched blade turbine downflow (PBTD).…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Comparison Between Classical Correlations and Ai Methodsmentioning

confidence: 99%

Section: Previous Workmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Artificial intelligence‐based correlation: Process side heat transfer coefficient for helical coils in stirred tank reactors

Moholkar

Vala²,

Mathpati

et al. 2021

Heat Trans

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Heat transfer coefficients in finned‐coil stirred‐tank systems

1990

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Steady-state and transient heat transfer coefficients were determined for a finned-coil, stirred-tank system using tlatblade turbine impellers in water. Fin spacing, flowrate, hot water temperature and agitator speed were varied for Re between 20 000 -110 000 for the agitated side.Individual transfer coefficients were calculated from the experimental overall coefficients. The correlation developed for predicting external transfer coefficients in agitated systems with finned-tube coils was tested against transient data.On a determink des coefficients de transfert de matiere en rCgime permanent ou transitoire pour des systkmes B reservoir agitC avec des serpentins B ailettes en utilisant des turbines a lames plates dans I'eau. On a fait varier I'espacement des ailettes, le debit, la temperature de I'eau chaude et la vitesse de I'agitateur, Re itant compris entre 20 OOO et 1 10 O00 pour la zone agitee.Des coefficients de transfert individuels ont ete calcules h partir des coefficients experimentaux globaux. La correlation etablie pour la prediction des coefficients de transfert externe dans les systkmes agites munis de serpentins a ailettes a ete comparCe aux donnies en regime transitoire.~ ~~

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