Review of experimentation and modeling of heat and mass transfer performance of fin-and-tube heat exchangers with dehumidification

Zhang, Guohui; Wang, Baolong; Li, Xianting; Shi, Wenxing; Cao, Yang

doi:10.1016/j.applthermaleng.2018.10.032

Cited by 45 publications

(7 citation statements)

References 75 publications

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“…The most interesting articles presents the results of studying the processes of heat and mass transfer of two-phase flows in heat exchangers with a finned surface. The main purpose of researching [7,8] was to improve the characteristics of the equipment in different ways. The ways to increase the coefficients of heat exchange a and mass exchange b [9], to optimise the fin design and to increase the efficiency coefficient E, to reduce the hydraulic resistance DP were determined.…”

Section: Features Of Heat Exchange Of Wet Steam By Forced Convection ...mentioning

confidence: 99%

Heat exchange under the longitudinal movement of wet steam in finning heat exchangers

Tu,

Lebed,

Kulesh

2024

Nauk. visn. nat. hirn. univ.

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The paper is devoted to the study on hydrodynamics and heat exchange of two-phase medium. While designing technological equipment, when the wet steam is used as the operating medium, the features of the interaction between liquid drops and the heat exchange surface are not considered in most cases. In full, this applies to steam turbines operating on the wet steam whose moisture content depends on the primary and secondary removal of liquid drops from the separation blocks. Purpose. Improving the method of calculation of recuperative heat exchangers, if wet steam is used as the operating medium. Methodology. It is based on the analysis of the physical model of moving the two-phase medium in the heat and mass exchange conditions, considering the design characteristics of the heat transfer surface. Findings. The correlation of critical values of two-phase flow parameters was obtained to determine the lower boundary of the process of plucking the drops from the liquid film depending on the irrigation density, geometric characteristics of the channel and physical properties of the liquid and gas. Correlations were obtained for pipes with longitudinal finning as the Π-shaped profile, based on which we recommend optimizing the geometric characteristics of longitudinal finning. Originality. Determining the limit modes of secondary removal formation during the movement of a two-phase medium in separation devices and the features of heat and mass transfer of wet steam in finning recuperative heat exchangers. Practical value. The presented results make it possible to optimize the design of recuperative heat exchangers with longitudinal Π-shaped finning.

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Section: Features Of Heat Exchange Of Wet Steam By Forced Convection ...mentioning

confidence: 99%

Heat exchange under the longitudinal movement of wet steam in finning heat exchangers

Tu,

Lebed,

Kulesh

2024

Nauk. visn. nat. hirn. univ.

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“…1a and Fig. 1b are those usually adopted in the standard design procedure of recuperative heat exchangers in general and of continuous fin-and-tube units in particular [32,26]:…”

Section: Problem Statementmentioning

confidence: 99%

A novel one-dimensional model to predict fin efficiency of continuous fin-tube heat exchangers

Suárez

Keegan

Mariani

et al. 2019

Applied Thermal Engineering

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“…In addition, with valid CFD modeling, analysis becomes more flexible and enable us to obtain a very specific data. With precision simulation, the optimization of heat exchanger design can be done in depth [8,9].…”

Section: Introductionmentioning

confidence: 99%

CFD Air Flow Evaluation of Finned Tube Evaporator for Refrigerated Display Cabinet Application

I Dewa Made Cipta Santosa,

I Gede Nyoman Suta Waisnawa,

Putu Wijaya Sunu

et al. 2024

CFDL

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This study is aimed to develop a simulation to improve the performance of the finned tube evaporator which is applied to the refrigerated display cabinet. CFD model was developed to be able to analyse the characteristics of air flow inside the fin gap and air side heat transfer coefficient. Geometry of the model of overall finned tube evaporator is considered covering two aluminium wavy fins with an air flow in between, combination of staggered cooper tubes with refrigerant flow inside. Fin gap is designed 4 mm to anticipate frost on the fin surface that can block air flow. Turbulence models used in the study is the realizable k-ε turbulence which had the best performance turbulence model and it was validated with secondary data from previous studies and shows the lowest error only 5.9 %. The use of CFD was found to be sufficiently representative of the heat transfer characteristics of evaporators, and acted as an effective simulation tool to determine the heat transfer coefficient in order to improve efficiency in terms of improved design. The characteristics of air flow between the fin gap and around the tube was obtained various and complex. In the case study the entry velocity of 1.7 m /s at the highest turbulence condition of the first row can reach speeds of 2.75 m/s. Hight turbulence regime in flow can indicate higher the heat transfer coefficient of the evaporator.

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Review of experimentation and modeling of heat and mass transfer performance of fin-and-tube heat exchangers with dehumidification

Cited by 45 publications

References 75 publications

Heat exchange under the longitudinal movement of wet steam in finning heat exchangers

Heat exchange under the longitudinal movement of wet steam in finning heat exchangers

A novel one-dimensional model to predict fin efficiency of continuous fin-tube heat exchangers

CFD Air Flow Evaluation of Finned Tube Evaporator for Refrigerated Display Cabinet Application

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