Dynamic heat transfer analysis of liquefied natural gas ambient air vaporizer under frost conditions

Liu, Shanshan; Jiao, Wenling; Ren, Lixin; Wang, Haichao; Zhang, Ping

doi:10.1016/j.applthermaleng.2016.09.016

Cited by 38 publications

(10 citation statements)

References 14 publications

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“…temperature, relative humidity and velocity [39]. Among these, surface temperature is the main influence factor [40], which is also demonstrated in the results of the model in examination. The system model considering extra frost layers may reveal the degree of performance degradation after certain time.…”

Section: Frosting Influencementioning

confidence: 63%

See 1 more Smart Citation

A waste cryogenic energy assisted freshwater generator for marine applications

Liu

Tsolakis

et al. 2021

Desalination

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Section: Frosting Influencementioning

confidence: 63%

“…The frost formation on the surface restricts the operation of the heat exchanger, thus several methods are employed to defrost such as switch operation time. A second identical heat exchanger unit is made available to allow the primary unit to defrost for minimum 4 hours [40]. Another method is to change the surface structure.…”

Section: Frosting Influencementioning

confidence: 99%

A waste cryogenic energy assisted freshwater generator for marine applications

Liu

Tsolakis

et al. 2021

Desalination

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“…where C0 is the black body radiation coefficient which value is 5.67 W/(m 2 •K 4 ), ɛ1 is the emissivity of the inner plate which value is 0.8; T1 is the inner wall temperature of the solar wall (K), A0 is the surface area of the AAV (m 2 ), a, b, c is the length, width and height of the AAV, respectively (m), A1 is the surface area of inner wall (m 2 ), l is the height of the solar wall (m) and hs is the composite convective heat transfer coefficient of air jet flow (W/(m 2…”

Section: Heat Transfer Coefficient Of Avcswmentioning

confidence: 99%

“…Unfortunately, ice and frost phenomenon will naturally emerge during the operation of AAV, which worsens its thermal performance. Jiao simulated the formation of frost layer and studied the boiling heat transfer in the pipe of L N G with CFD [2]. Handy Afrianto concluded that the optimization of mass flow was favorable for the vaporization of L N G [3].…”

Section: Introductionmentioning

confidence: 99%

Simulation and Performance Analysis of a Novel LNG Air Vaporizer Coupled with Solar Wall

Shi¹,

Li²,

Wang³

et al. 2017

Proceedings of the 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017)

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This paper presents a novel L N G air vaporizer that evaporates L N G using hot air generated by a solar wall. The simulation results and an overview of the thermal performance assessment are presented in this work. The simulations were made by use of the CFD software FLUENT to investigate the variation of both air temperature and air velocity in the solar wall. The calculations were also performed for a type YGK-350D AAV to predict the thermal performance of the new air vaporizer under different meteorological conditions and various structure parameters. Compared with a conventional AAV, the heat transfer performance of the novel air vaporizer is increased by 1.82 and 3.03 times on a typical day in summer and winter, respectively.

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“…The selected relations of the above parameters were proposed for optimal design of vaporizers. The coupled dynamic model of frost formation and flow boiling heat transfer of LNG was presented in paper [5]. One of the main conclusions of the above study was that the thermal resistance of the frost layer increased with the operation time and is the major factor affecting the temperature of finned tube walls.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fins Number and Frosting on Heat Transfer through Longitudinal Finned Tubes of LNG Ambient Air Vaporizers

Lisowski

2022

Energies

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The use of cryogenic liquefied gasses in industry is constantly increasing both for process purposes and for power supply needs. The liquefied natural gas (LNG) is stored at cryogenic temperature and its immediate use in gaseous form requires its evaporation. The heat needed to cause a phase change is usually delivered by means of vaporizers. This paper presents a numerical analysis of the influence of the fins number and frost accumulated within the fins surface on the heat transferred through the aluminum finned tubes of LNG ambient air vaporizers. The calculations were carried out applying finite element thermal analysis within Ansys software as well as using an analytical approach. As a result, the heat rate per unit length of the finned tube was obtained. The results were compared for different numbers of longitudinal fins both without frost and for total frosting of the tubes.

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Dynamic heat transfer analysis of liquefied natural gas ambient air vaporizer under frost conditions

Cited by 38 publications

References 14 publications

A waste cryogenic energy assisted freshwater generator for marine applications

A waste cryogenic energy assisted freshwater generator for marine applications

Simulation and Performance Analysis of a Novel LNG Air Vaporizer Coupled with Solar Wall

Influence of Fins Number and Frosting on Heat Transfer through Longitudinal Finned Tubes of LNG Ambient Air Vaporizers

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