Multi-parameter optimization of shell-and-tube heat exchanger with helical baffles based on entransy theory

Wen, Jian; Gu, Xin; Wang, Mengmeng; Liu, Yuce; Wang, Simin

doi:10.1016/j.applthermaleng.2017.10.164

Cited by 41 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Because of the continuous helical baffle with an approximately 40° inclined helix angle from the perpendicular to the STHX axis, it can effectively guide the shell side fluid to fit with the arc surface of the baffle. As a result, helical baffles can provide a more uniform flow velocity distribution and can reduce bypass effects [8][9][10] . As for STHX equipped with a continuous helical baffle, the main structure parameter is the baffle pitch p. The numerical simulation was performed when the fluid medium flow rate in the STHX shell side was 2.0 kg/s, the baffle pitch p was from 100 mm to 250 mm (Δp=50 mm).…”

Section: Effect Of the Helical Baffle On Thermo-hydraulic Behaviormentioning

confidence: 99%

Numerical Simulation of Thermo-hydraulic Behaviour of Shell and Tube Heat Exchanger Equipped with Segmental Baffle and Helical Baffle

Hu,

Liu,

Jin

2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The baffle type and structure are critical to enhancing the comprehensive thermo-hydraulic behavior of shell-and-tube heat exchangers (STHX). In the study, Solidworks software was used to establish three-dimensional mesh models of STHX equipped with the segmental baffle and the continuous helical baffle, respectively. ANSYS software was adopted to study the effects of the baffle type and the baffle geometric parameters on the thermo-hydraulic characteristic of STHXs using the pressure drop of the shell side, the coefficient of heat transfer and isobaric JFP factor as the evaluation characteristics. For segmental baffles, better thermo-hydraulic performance could be obtained with a baffle spacing of 200 mm and a gap height of 0.4 D. For helical baffles, an optimized thermo-hydraulic performance could be obtained with a baffle pitch of 150 mm. By comparing the comprehensive thermo-hydraulic performances of STHXs equipped with two different baffles, it could be concluded that the isobaric JFP factor of STHX equipped with the helical baffle was 1.18 times that of STHX equipped with the segmental baffle under the different suitable flow rate.

show abstract

Section: Effect Of the Helical Baffle On Thermo-hydraulic Behaviormentioning

confidence: 99%

Numerical Simulation of Thermo-hydraulic Behaviour of Shell and Tube Heat Exchanger Equipped with Segmental Baffle and Helical Baffle

Hu,

Liu,

Jin

2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…魏曙寰等人 [67] 对多孔介质管壳式换热器进行了积耗散率最小的研究, 发现适当增加换热器内肋片数目有助于提高换热性能. Guo和Xu [68] 发现传热引起的积耗散远大于流体流动引起的积耗散, 采用多目标研究方法有效地解决了这一问题, 优化后管壳式换热器的泵功有效降低. Wen等人 [70] 以当量热阻最小为目标对包含螺旋折流板的管壳式换热器进行了优化, 优化后换热器当量热阻降低了7%, 并发现壳侧流体流速对换热器当量热阻影响最大.…”

Section: 引言unclassified

Constructal optimization for an organic fluid shell-and-tube heat exchanger based on entransy theory

Feng

Xie

et al. 2020

Sci. Sin.-Tech.

View full text Add to dashboard Cite

“…Labbadlia et al (2017) studied the influence of tubes arrangements on the flow distribution in a shell and tube heat exchanger with helical baffles, the obtained results show that the 60° arrangements gives a better uniformity of flow distribution by 21 per cent, and the 45° arrangements gives good uniformity of pressure distribution. Wen et al (2017) studied the effects of helix angle and showed that the dissipation thermal resistance decreased with velocity but increased with the helix angle. Shinde and Chavan (2017) a numerical study of the dynamic and thermal behavior of flow in a shell and tube heat exchanger with continuous helical baffles, their results show that the larger helix angles lower heat transfer and pressure drop, and smaller helix angles higher heat transfer and pressure drop and it can be observed that the k ε realizable turbulence model showed good agreement with the experimental results by average per cent deviation in the range of 8 per cent.…”

Section: Introductionmentioning

confidence: 99%

Turbulent forced convection in a shell and tube heat exchanger equipped with novel design of wing baffles

Youcef

Saïm

Öztop

et al. 2019

HFF

View full text Add to dashboard Cite

Purpose This work presents a numerical study of the dynamic and thermal behavior of a turbulent flow in a shell and tube heat exchanger equipped with a new design of baffle type wing. The implementation of this type of baffle makes it possible to lengthen the path of the fluid in the shell, to increase the heat flux exchanged on the one hand and is to capture the weakness of the shell and tube heat exchanger with segmental baffles on the other hand. Design/methodology/approach This paper aims to analyze numerically the thermo-convective behavior of water using CFD technique by solving the conservation equations of mass, momentum and energy by the finite volume method based on the SIMPLE algorithm for coupling velocity-pressure. To describe the turbulence phenomenon, the Realizable k–ε model is employed. The analysis is done for different mass flow rates. The parameters studied are: the fluid outlet temperature, the average heat transfer coefficient, the pressure drop, the total heat transfer rate, the effect of the geometric shape of the baffle on the thermal behavior. The purpose of this study is to propose a new design of a shell and tube heat exchanger with a high heat transfer coefficient and a lower pressure drop compared to a shell and tube heat exchanger with transverse and segmental baffles. Findings The results showed that the use of the wing baffles enhanced the heat transfer coefficient significantly and reduced the friction coefficient. Compared with segmental baffles, the wing baffles are 11.67, 18.53 and 11.5 per cent lower in the pressure drop and 1.79, 1.9 and 2.39 per cent higher in the Nusselt number for the three mass flow rates 0.5, 1 and 2 kg/s, respectively. Originality/value The originality of this work lies in proposing a three-dimensional analysis for a novel heat exchanger.

show abstract

Multi-parameter optimization of shell-and-tube heat exchanger with helical baffles based on entransy theory

Cited by 41 publications

References 22 publications

Numerical Simulation of Thermo-hydraulic Behaviour of Shell and Tube Heat Exchanger Equipped with Segmental Baffle and Helical Baffle

Numerical Simulation of Thermo-hydraulic Behaviour of Shell and Tube Heat Exchanger Equipped with Segmental Baffle and Helical Baffle

Constructal optimization for an organic fluid shell-and-tube heat exchanger based on entransy theory

Turbulent forced convection in a shell and tube heat exchanger equipped with novel design of wing baffles

Contact Info

Product

Resources

About