Prediction of the outlet temperatures in triple concentric—tube heat exchangers in laminar flow regime: case study

Pătrăşcioiu, Cristian; Radulescu, Sinziana

doi:10.1007/s00231-014-1385-2

Cited by 20 publications

(5 citation statements)

References 6 publications

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“…Radulescu et al 25 carried out an analysis of DTHE and TCTHE and discovered that the heat transfer area and the overall heat transfer coefficients for TCTHE are greater than DTHE for the equal length of a heat exchanger. The arithmetic model of TTHE was studied by Patrascioiu and Radulescu 26 examining numerous iterations for expressing fluid outlet temperature and total heat transfer coefficient. Batmaz and Sandeep 27 explored and perceived that the overall heat transfer coefficient values were smaller in the parallel arrangement than in the counter flow arrangement.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer analysis of triple concentric tube heat exchanger using MWCNT/water nanofluids under parallel flow configurations

Hariprasath

Kumar²

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this investigation, heat transfer characteristics of Multi-Walled Carbon Nanotubes/water nanofluids are studied experimentally in a triple concentric tube heat exchanger under parallel flow configurations and compared with water. The Multi-Walled Carbon Nanotubes/water nanofluids are formulated for 0.2, 0.4 and 0.6% nanoparticle volume concentrations using a two-step method by adding sodium dodecylbenzene sulfonate surfactant. At 0.6% particle volume concentration, the Nusselt number is found to be 10% higher compared with water at 7500 Reynolds number. In this experimental investigation, it is found that at Reynolds number 9500, the overall heat transfer coefficient is enhanced by 15% and pressure drop enhanced by 15% compared with water at 6500 Reynolds number and friction factor is enhanced by 16% compared with water at 0.6% Multi-Walled Carbon Nanotubes/water nanofluids concentration.

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Section: Introductionmentioning

confidence: 99%

Heat transfer analysis of triple concentric tube heat exchanger using MWCNT/water nanofluids under parallel flow configurations

Hariprasath

Kumar²

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…A vast amount of works is available on the first group. While some authors performed mathematical modelling of shell-and-tube heat exchangers (Turgut, Turgut & Coban, 2014;Markowski & Trzcinski, 2019; and triple concentrictube heat exchangers (Batmaz & Sandeep, 2005;Patrascioiu & Radulescu, 2015;Radulescu, Negoita & Onutu, 2019), there are other studies related to numerical modelling of these equipment (Rao & Raju, 2016;Bayram & Sevilgen, 2017;Taler, 2019;Xavier-Andrade, Quitiaquez-Sarzosa & Fernando-Toapanta, 2020). In spite of its broader application, the overall heat transfer coefficient entails time-consuming calculations as well as using heat transfer correlations that regularly provides inaccurate results, with errors ranging up to 40 % (Laskowski, 2011;Markowski & Trzcinski, 2019).…”

Section: Introductionmentioning

confidence: 99%

Dimensional analysis applied to jacketed shell and tube heat exchangers modeling

Escalona¹,

Camaraza-Medina

Retirado-Mediaceja³

et al. 2021

Enfoque UTE

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Dimensional analysis was utilized on this research to establish a shortcut model for predicting hydrogen sulphide gas discharge temperature in jacketed shell and tube heat exchangers. Since the equipment belongs to an online industrial facility, the passive experimental method was applied. Selection of the heat transfer process parameters was followed by application of the Buckingham Pi-theorem and the repeating-variables technique. After formulation of the dimensionless groups, approximation of the explicit model equation was carried out through a least-squares multivariate linear regression. The model predictive ability performance was appraised by comparing predictions versus measured discharge temperatures, hence attaining a Pearson correlation of 97.5 %, a mean absolute error of 2.1 K, and 1.7 % maximum deviations. The explicit equation that was obtained is pertinent to studied heat exchangers, when 0.55 ≤ ṁ1 ≤ 0.60, 1.06 ≤ ṁ2 ≤ 1.09, and 0.22 ≤ ṁ3 ≤ 0.24 (fluids flowrate, kg/s). It can be used as an alternative calculation method for quick anticipation of the equipment performance, which overcomes computation of the overall heat transfer coefficients.

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“…Kumar et al [13] carried out the research for purifying milk using TCTHE and generated simulation model to speculate the fouling thickness and milk outlet temperature. Patrascioiu and Radulescu [14] established a mathematical model of the triple tube heat exchanger by considering several assumptions for predicting fluid outlet temperature and overall heat transfer coefficient. Batmaz and Sandeep [15] and Avudaiappan et al [16] found that the overall heat transfer coefficient values of three tubes were higher in the c1ounter flow arrangement than the parallel arrangement.…”

Section: Introductionmentioning

confidence: 99%

Analysis on thermal and flow behavior of triple concentric tube heat exchanger handling MWCNT-water nanofluids

Mukesh¹,

Visvanathan²

2020

THERM SCI

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Design of heat exchangers and heat transfer enhancement methods are struggling to meet out the cooling demand of present scenario. Many researchers suggested that the addition of nanosized solids particles into traditional base fluids resulting the higher heat transfer rate than the existing coolants and named the new fluids as nanofluids. In this investigation, the effect of microwave carbon nanotube (MWCNT)-water nanofluids on heat transfer rate, pressure drop and pumping power of a triple concentric tube heat exchanger are experimentally investigated and compared the results of MWCNT-water nanofluids with water. The MWCNT-water nanofluids were prepared by two step method at the volume concentrations of 0.2%, 0.4%, and 0.6%. The range of target fluid mass-flow rate is in the range of 0.026 to 0.039 kg per second and the constant heat flux condition is considered. On experimentation, it is noted that the effectiveness and pressure drop of 0.6% MWCNT-water based nanofluids are 27% and 21% greater than water at the maximum mass-flow rate. The reason for improved heat transfer rate of nanofluids is because of higher thermal conductivity, Brownian motion, lower boundary-layer thickness, and lower specific heat capacity of nanofluids. Also found that the pumping power increases with increasing volume concentration and pumping power is 25% higher than water at the 0.6% nanofluids. Therefore, the MWCNT-water nanofluids are good choice for replacing water as coolant in triple concentric tube heat exchanger.

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Prediction of the outlet temperatures in triple concentric—tube heat exchangers in laminar flow regime: case study

Cited by 20 publications

References 6 publications

Heat transfer analysis of triple concentric tube heat exchanger using MWCNT/water nanofluids under parallel flow configurations

Heat transfer analysis of triple concentric tube heat exchanger using MWCNT/water nanofluids under parallel flow configurations

Dimensional analysis applied to jacketed shell and tube heat exchangers modeling

Analysis on thermal and flow behavior of triple concentric tube heat exchanger handling MWCNT-water nanofluids

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