Experimental study of falling film flow characteristics outside shaped tubes related to a spiral‐wound heat exchanger

Liu, Liang; Sun, Chongzheng; Li, Yuxing; Han, Hwataik; Gu, Xingyuan; Guocong, Wang; Zhou, Hui

doi:10.1002/apj.2347

Cited by 5 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Owing to the small transfer resistance and high transfer efficiency, the falling film has attracted more attention for applications such as desalination, gas treatment, air separation, refrigeration systems, and distillation 1–5 . To guarantee heat and mass transfer efficiency, the surface must be wetted entirely.…”

Section: Introductionmentioning

confidence: 99%

“…The falling film outside the sinusoidal corrugated tube and the square‐corrugated tube were measured using n‐pentane as the testing fluid. It showed that the tube shape has a great influence on the flow regime transition 3 . Ebanesar and Mani 31,32 discovered that corrugated plates of the sinusoidal type contribute to the film heat transfer under the phase change condition.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

Wan

2021

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

In this study, 2D and 3D models of corrugated plates using the volume of fluid (VOF) model were set up to simulate the influence of corrugated structure on the wettability and heat transfer. The results show that compared with the triangular corrugation, the rectangular corrugation has a slower growth rate of wetting ratio (WR) as the Weber number (We) increases under the same corrugation length Le and corrugation depth De. The average WR of the triangular corrugation is 2.8% less than that of the smooth plate. For the triangular corrugation, the higher Le contributes to improving wettability, but the average heat transfer coefficient havg first decreases to the minimum at Le = 5 mm and then increases 8% to 9% to a steady value until Le = 8 mm. WR decreases with De at We ≤ 0.76. A WR correlation considering the corrugation steepness St (St = De/Le) and a critical Re correlation corresponding to the minimum wetting rate were fitted for the liquid oxygen. As the inclination angle ϕ increases, the average film thickness decreases and havg increases until ϕ = 75°, while the variation rate slows down afterwards. At Re = 1200, havg has a decreasing trend at St ≤ 0.13, increases at St ≥ 0.14 and reaches a plateau after St = 0.24 as St increases. It increases by 30.6%, 47.4%, and 44.4% for the inclination angle ϕ = 30°, 60°, 90° cases from St = 0.14 to 0.24. The enhancement is caused by the vortices existing at St ≥ 0.14.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

Wan

2021

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

“…The accuracy of the heat transfer correlation was verified using a parallel-tube heat transfer test bench with air as the working fluid. Liu et al [ 6 ] proposed a mathematical model for a double-layer spiral-wound heat exchanger and experimentally verified the accuracy of the theoretical model. Neeraas et al [ 7 ] conducted an experimental analysis of the falling-film characteristics of the shell side of a tubular heat exchanger, and compared the results with the calculation method for the heat transfer coefficient proposed by Bays and McAdams [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of heat transfer performance of spiral wound heat exchanger under sloshing condition

Dong,

2023

PLoS ONE

View full text Add to dashboard Cite

LNG floating production storage and offloading (FPSO) unit is a new type of floating production unit developed for offshore natural gas fields. It performs the functions of natural gas extraction, pretreatment, liquefaction, and storage. In this study, the heat transfer characteristics of a spiral-wound heat exchanger were studied using numerical simulations, which provides a basis for equipment selection and structural optimization of spiral-wound heat exchangers. The main research contents and conclusions are as follows. Under land-based simulation conditions, the heat transfer coefficient of the shell side of the spiral-wound heat exchanger decreases with an increase in the winding angle of the heat exchange tube, decreases with an increase in the spacing of the heat exchange tube, and increases with an increase in the outer diameter of the heat exchange tube. When the winding angle increased from 5° to 8°, the heat transfer coefficient decreased by 6.70%. The heat transfer coefficient of the shell side decreased by 13.21% when the heat exchange tube spacing increased from 14 to 17 mm. The heat transfer coefficient of the shell side increased by 22.89% when the outer diameter of the heat exchange tube increased from 9 to 12 mm. When the sloshing angle is constant, the heat transfer coefficient of the spiral-wound heat exchanger decreases with an increase in the winding angle and spacing of the heat exchange tubes, and increases with an increase in the outer diameter of the heat exchange tubes. When the structural parameters of the heat exchanger are constant, the heat transfer coefficient decreases as the sloshing angle increases. When the sloshing angle was less than 3°, the sloshing promoted heat transfer on the shell side. When the sloshing angle was higher than 7°, the heat transfer effect of the shell side deteriorated considerably, which weakened the heat transfer performance of the heat exchanger. When the sloshing period is constant, the heat transfer coefficient of the wound heat exchanger decreases with an increase in the winding angle and spacing of the heat exchange tubes, and increases with an increase in the outer diameter of the heat exchange tubes. When the structural parameters of the heat exchanger are constant, the heat transfer coefficient increases with sloshing period. When the sloshing period was greater than 15 s, the influence of sloshing on the heat transfer on the shell side of the heat exchanger was relatively weak.

show abstract

Heat transfer enhancement in falling liquid films on an array of horizontal tubes with plasma spray porous coating

Pecherkin,

Volodin,

Das

et al. 2025

Applied Thermal Engineering

View full text Add to dashboard Cite

Experimental study of falling film flow characteristics outside shaped tubes related to a spiral‐wound heat exchanger

Cited by 5 publications

References 20 publications

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

Numerical simulation of heat transfer performance of spiral wound heat exchanger under sloshing condition

Heat transfer enhancement in falling liquid films on an array of horizontal tubes with plasma spray porous coating

Contact Info

Product

Resources

About