Nusselt number correlation for compact heat exchangers in transition regimes

Mortean, M.V.V.; Mantelli, Marcia

doi:10.1016/j.applthermaleng.2019.02.017

Cited by 22 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They have found that the vortex-generator has the significant increase of the heat transfer. Mortean and Mantelli [3] suggested new correlation for estimating the Nusselt number correlations of the plate heat exchanger in transitional flow regimes with the good agreement between the experimental and numerical results. Churchill [4] suggested friction-factor equation as a function of Reynolds number, surface roughness, and pipe diameter and provided unique values for all fluid flow regimes.…”

Section: Introductionmentioning

confidence: 78%

Numerical and Experimental Study of Air-to-Air Plate Heat Exchangers with Plain and Offset Strip Fin Shapes

Kim¹,

Lee²,

Jeong

et al. 2020

Energies

View full text Add to dashboard Cite

This study evaluates the performance of a plate heat exchanger numerically and experimentally. The predictive model for estimating the heat transfer and frictional pressure drop across the plain and offset strip fins is compared with the experimental results with the parameters of Reynolds number and fin pitch. The heat transfer of the offset fin shape is 13.4% higher than that of the plain fin in the experiment in the case of Re = 6112 for the hot airflow and Re = 2257 for the cold airflow. A predictive model uses the effectiveness-Number of Transfer Units (NTU) method with the discretization in the segments divided into small control volumes in the heat exchanger. The difference of heat transfer and pressure drop for the plain fin between the numerical and the experimental results are approximately 1.9% and 5.9%, respectively. Thus, the results indicate that the predictive model for estimating the heat transfer is useful for evaluating the performance of the plate heat exchanger in the laminar-to-transition regions.

show abstract

Section: Introductionmentioning

confidence: 78%

Numerical and Experimental Study of Air-to-Air Plate Heat Exchangers with Plain and Offset Strip Fin Shapes

Kim¹,

Lee²,

Jeong

et al. 2020

Energies

View full text Add to dashboard Cite

show abstract

“…Several studies on the design of heat exchangers have been conducted [17][18][19][20][21][22][23][24][25][26][27][28]. In contrast to the studies mentioned, we analyze and evaluate the processes.…”

Section: Introductionmentioning

confidence: 99%

DESIGN OF HEAT EXCHANGER FOR THE PRODUCTION OF SYNTHESIS PbO PARTICLES

Vena,

Nandiyanto,

Ragadhita

et al. 2023

Flash

View full text Add to dashboard Cite

This study aims to develop and analyze the design of heat exchangers (HE) in the synthesis of PbO particles using a single precursor method. This type of HE shell and tube one-pass is designed to be simple. The specifications of HE equipment are shell length 1.5200 m, shell diameter 0.1361 m, outer tube diameter 0.0334 m, and thickness 0.0243 m. Then the calculation is done manually using the Microsoft Excel application. The results showed that the HE shell and tube design with the one pass type has a laminar flow, with an effective value of 84.66%. Therefore, this heat exchanger with shell and tube one meets the requirements and standards based on effectiveness, but without considering the fouling factor. The results of this analysis can be used as a learning medium in the design process, analysis of heat exchanger performance, and operating mechanisms.

show abstract

The potential of thermally conductive polymer composites regarding crystallization fouling mitigation

et al. 2023

View full text Add to dashboard Cite

The fouling kinetics and amount of calcium sulfate and calcium carbonate, respectively, on different polypropylene/graphite composites in a flat plate heat exchanger are determined and compared to the reference material stainless-steel. For a straight evaluation of the fouling susceptibility of the materials the formation of bubbles on the materials is considered by optical imaging or excluded by a degasser. The results are interpreted using surface free energy and roughness of the surfaces.The results show that when bubble formation is avoided, the polymer composites have a very low fouling tendency compared to stainless steel. This is particularly the case when turbulent flows are present or when sandblasted specimen are used. Sandblasting also continues to increase heat transfer compared to untreated samples by increasing thermal conductivity and creating local turbulences. Depending on the test conditions, the fouling resistance formed on the stainless-steel surface is an order of magnitude greater than on the polymer composites. In addition, the fouling layers adhere only weakly to the composites, which indicates an easy cleaning in place after the formation of deposits.

show abstract

Nusselt number correlation for compact heat exchangers in transition regimes

Cited by 22 publications

References 34 publications

Numerical and Experimental Study of Air-to-Air Plate Heat Exchangers with Plain and Offset Strip Fin Shapes

Numerical and Experimental Study of Air-to-Air Plate Heat Exchangers with Plain and Offset Strip Fin Shapes

DESIGN OF HEAT EXCHANGER FOR THE PRODUCTION OF SYNTHESIS PbO PARTICLES

The potential of thermally conductive polymer composites regarding crystallization fouling mitigation

Contact Info

Product

Resources

About