Development of Nusselt number correlation using dimensional analysis for plate heat exchanger with a carboxymethyl cellulose solution

Dimensional analysis was used on this study with the aim of stablishing a model for prediction of the monoethanolamine heat exchangers output. The passive experimentation method was applied to gather 14 400 data points, since the exchangers are installed in an online amine treating unit. After identification of those parameters having a relevant effect on heat transfer processes, the Buckingham Pi theorem and the method of repeating variables were implemented. Once the dimensionless groups were formulated, the explicit equation was found by means of a least-squares regression analysis. The simulation model was evaluated by comparing predicted results against measured rich amine exit temperatures. In this respect, 98.96 % correlation, 0.023 % mean absolute percentage error and 1.376 K maximum absolute error were achieved. Findings of this research may serve as a shortcut for quick and accurate anticipation of the equipment performance, since the plant is often operated outside design parameters. Despite the above, obtained explicit equation is only valid for the studied set of heat exchangers.

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“…Model verification was carried out by comparing predicted results against measured rich amine outlet temperatures [9][10]16].…”

Section: Methodology Overviewmentioning

confidence: 99%

“…They allow transformation of the system of mass, momentum, energy and species balance equations into non-dimensional forms, thus facilitating generalization of the theoretical and experimental results [7]. Most of the researches aimed to determine empirical heat transfer coefficients are based on this concept [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Monoethanolamine Heat Exchangers Modeling Using the Buckingham Pi Theorem

Escalona¹,

Góngora-Leyva²,

Camaraza-Medina³

2019

MMEP

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“…It was known that plate heat exchanger experience momentous pressure drop for the first ten channels. However this detrimental effect is diminished by increasing number of channels [14]. As PHX-S had number of channels less than 10 and relatively small ports diameter i.e.…”

Section: Critical Heat Exchanger Parameters (Lmtd U0 and Fouling)mentioning

confidence: 97%

“…20 mm as compared to 100 mm in PHX-B, the maldistribution effect was substantial and excessive pressure drop across the PHX-S was inevitable. Combined with end-plate effect [12], this had severely affected heat conduction [14,15] and contributed lowered value of U0 than it was designed for. PHX-S was a brand new plate heat exchanger and unfouled, thus it was expected to have U0 approximately at 1600 J/s.m 2 .K instead of 694 J/s.m 2 .K (Table 1).…”

Section: Critical Heat Exchanger Parameters (Lmtd U0 and Fouling)mentioning

confidence: 99%

“…where Nu is Nusselt number, Pr is Prandtl number, μm is fluid viscosity at bulk fluid temperature, μw is fluid viscosity at heat transfer boundary surface temperature, f is friction factor for turbulence regime as defined from Focke et al [17] and Bobbili et al [14], Re is Reynolds number, and β is chevron angle. Heat transfer dimensionless parameters are tabulated on Table 3.…”

Section: Critical Heat Exchanger Parameters (Lmtd U0 and Fouling)mentioning

confidence: 99%

See 1 more Smart Citation

Rapid Evaluation of Plate Heat Exchanger Performance and Fouling Analysis in Epoxidation of Oleochemical at Pilot Plant Scale

Hazmi¹,

Maurad²,

Pauzi³

et al. 2016

IJHT

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Rapid evaluation for plate heat exchanger is vital in energy-intensive chemical epoxidation as plant shutdown is not always feasible. In this paper, critical parameters for three different sizes of plate heat exchanger were determined based on temperature assessment via infrared thermometer. Extent of fouling was determined based on values of overall heat transfer coefficient, U0. Number of heat transfer unit (NTU) larger than 1.25 and Nusselt (Nu) higher than 50 was found to be efficient and had sufficient degree of convection for epoxidation. Furthermore it was found that NTU had a significant and nonlinear relationship with heat flux, q" and Nusselt, Nu for the duration-sensitive epoxidation. However in this study, LMTD showed insignificant difference with respect to plate heat exchanger performance.

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A cost‐effective approach to generate accurate correlations via analyzing a minimum number of data points; Case study on the convection heat transfer problem

Darbandi

Jalali

2022

Can J Chem Eng

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It is very common in the heat transfer area to analyze and design heat equipment using the past available heat correlations. Basically, demanding higheraccuracy correlations enforces the heat laboratories to test and collect larger banks of laboratory data. However, this conversely affects the laboratory cost.Therefore, it becomes challenging to create new approaches that let the correlation developers use smaller experimental datasets and provide correlations with sufficient accuracies. To surmount this challenge, the present work develops a new approach that benefits from the computational fluid dynamics method as a reliable and cheap tool and adequately enriches the original, insufficient dataset. Then, suitable enhanced correlations are developed using the new enriched experimental-numerical-based dataset. In parallel, the artificial neural network (ANN) is used to enrich the original insufficient dataset separately. Using this experimental-ANN-based dataset, it provides a totally ANN-based correlation. It is shown that the results of enhanced correlations are as accurate as those of the ANN-based correlation. However, the point is that the use of the present approach is about 100 times faster than using the ANN. The typical forced convection heat transfer through a pipe is examined here to show the capabilities of the current approach.

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Development of Nusselt number correlation using dimensional analysis for plate heat exchanger with a carboxymethyl cellulose solution

Cited by 12 publications

References 20 publications

Monoethanolamine Heat Exchangers Modeling Using the Buckingham Pi Theorem

Monoethanolamine Heat Exchangers Modeling Using the Buckingham Pi Theorem

Rapid Evaluation of Plate Heat Exchanger Performance and Fouling Analysis in Epoxidation of Oleochemical at Pilot Plant Scale

A cost‐effective approach to generate accurate correlations via analyzing a minimum number of data points; Case study on the convection heat transfer problem

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