Experimental study on overall heat transfer coefficient of seawater on three tube arrangements for horizontal-tube falling film evaporator

Mu, Xingsen; Shen, Shengqiang; Yang, Yong; Liang, Gangtao; Xue, Changfeng; Zhang, Jili

doi:10.1080/19443994.2015.1082941

Cited by 10 publications

(4 citation statements)

References 15 publications

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“…At lower spray height, the heat transfer coefficient increases with the increase of tube spacing due to the impact of liquid film. 24 2.2. Liquid Distribution with and without BDS.…”

Section: Balanced Distribution Structurementioning

confidence: 99%

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Improved Heat Transfer Performance of Falling Film Evaporator for Desalination Industry by Balanced Liquid Distribution

Cao

Xie

et al. 2020

Ind. Eng. Chem. Res.

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Horizontal-tube falling film evaporators (HFE) are widely used in the thermal desalination industry due to their increasing advantages. The liquid distribution state of the tube bundle directly affects the heat transfer performance of the evaporator. To improve the uneven liquid distribution among tube rows, a balanced distribution structure (BDS) that can balance the liquid distribution state in the HFE was proposed. A general distributed parameter model was built to describe the steady-state performance of the HFE with and without the BDS, taking into account different liquid distribution of odd and even rows. The model is applied to simulate the multieffect distillation (MED) system of a desalination power plant, and the numerical results show a good arrangement with the operating results. The results indicate that the BDS slightly improves the overall heat transfer performance and the total evaporation rate. This work and the designed BDS certainly could help in the design and optimization of HFE for desalination processes.

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“…At lower spray height, the heat transfer coefficient increases with the increase of tube spacing due to the impact of liquid film. 24 2.2. Liquid Distribution with and without BDS.…”

Section: Balanced Distribution Structurementioning

confidence: 99%

“…Furthermore, the vertical tube spacing of the triangular-pitch arrangement is larger than that of the square-pitch arrangement. At lower spray height, the heat transfer coefficient increases with the increase of tube spacing due to the impact of liquid film …”

Section: Balanced Distribution Structurementioning

confidence: 99%

Improved Heat Transfer Performance of Falling Film Evaporator for Desalination Industry by Balanced Liquid Distribution

Cao

Xie

et al. 2020

Ind. Eng. Chem. Res.

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“…As an application of the Dead Sea water (DSW) experiments, working fluid in the solar collectors will give a better heat efficiency, and transfer, than many other working fluids such as pure water, or hydrocarbons oils because its content of minerals, and its ionic bonds, this research uses the same solar collectors and the working fluid DSW [Al Tarawneh and Abu-Zaid 2019]. In another study, it has been concluded that the heat transfer coefficient is less with salted water than with fresh one [Mu et al 2016].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Potential of Steam Hydro Capacitor – Prototype

Alsaqoor¹,

Sarayreh²,

Andruszkiewicz³

et al. 2022

Ecol. Eng. Environ. Technol.

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Recently, hydropower energy resources become an attractive means of generating electricity for, off-grid networks, especially in rural areas. This work aims to design a suitable prototype of an energy-storing system, which is called a Potential Steam Hydro Capacitor. This system gives a manageable source of electricity, and partially provides drinkable water, at a low cost, as an alternative to comparatively high-cost electrical batteries. The system is composed of two solar collectors, connected in series. The working fluid in the first collector is Dead Sea water, and in the second fresh water, a heat exchanger, a thermosiphon solar water heater connected to a high column to pass the vapor to high altitude, and a condensation unit on the roof of the building. The system succeeds in producing a considerable amount of fresh water at a height of 3.4 m. The potential energy produced, can operate a small turbine. The capability of the system, to convert thermal energy in the freshwater, to potential energy, was high, with an efficiency of 66.7%. adding solar concentrators to the system would increase the water collected.

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“…Mu et al [1,2] and Shen et al [3,4] conducted a comprehensive study on the flow characteristics and heat transfer efficiency of fluids in falling film evaporators. They also studied in detail the various factors affecting heat transfer, such as heat flux density, number of tubes, spray density, evaporation temperature, etc., and studied the difference in heat transfer between seawater and freshwater as experimental fluids.…”

Section: Introductionmentioning

confidence: 99%

Study on liquid film thickness and flow characteristics of falling film outside an elliptical tube

Zhang¹,

Zhu²,

Q³

2019

DWT

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A three-dimensional model is applied to simulate the spreading process and thickness distribution of the liquid film outside an elliptical horizontal tube falling-film heat exchanger. Reynolds number (Re) is 187 and the counter-current air flow rates are 0, 0.1 and 0.5 m/s, respectively. The volume of fluid method is used to trace the gas-liquid interface. It is shown that falling film flow delays and the liquid film thickness increases as the gas flow rate increases. When the counter-current gas flow rate is increased to 0.5 m/s, the falling film distribution becomes uneven and local accumulation occurs. Along the circumferential direction, the liquid film velocity increases as the gas flow rate increases.

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Experimental study on overall heat transfer coefficient of seawater on three tube arrangements for horizontal-tube falling film evaporator

Cited by 10 publications

References 15 publications

Improved Heat Transfer Performance of Falling Film Evaporator for Desalination Industry by Balanced Liquid Distribution

Improved Heat Transfer Performance of Falling Film Evaporator for Desalination Industry by Balanced Liquid Distribution

Investigating the Potential of Steam Hydro Capacitor – Prototype

Study on liquid film thickness and flow characteristics of falling film outside an elliptical tube

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