Numerical Simulation of Heat and Moisture Transfer in Deep Air Buried

Yuan, Lei; Liu, Shunbo; Zhang, Haiding

doi:10.1016/j.proeng.2017.10.296

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…The governing equations for the solution of the current problem can be expressed as follows in Equations ( 1)-( 7) [42][43][44]. These equations will be solved using Ansys Fluent 2017, a computational fluid dynamics software.…”

Section: Governing Equationsmentioning

confidence: 99%

A Study on the Conditions of Fog Generation and the Change Rule of Fog Zone Length in Air Intake Roadway

Wu,

Zhu,

Zhang

et al. 2024

Sustainability

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Fog in mine air intake roadways is a non-negligible disaster that seriously reduces the visibility of the roadway, affects vehicle transportation and the safe passage of personnel, and jeopardizes the safe production of the mine. This paper applies both field testing and numerical simulation to explore fog formation conditions and the effects of inlet air temperature and humidity on the fog zone length within the Wangjialing Mine’s air intake roadway in Shanxi, China. First, based on the consideration of the relationship between the moisture gain of surrounding rock and the temperature with humidity of the air flow, the fog generation and distribution law model of the air intake roadway was established. Based on this model, the critical inlet air temperature and the critical inlet air relative humidity for fogging in the Wangjialing Mine air intake roadway were determined. In addition, we found that the fogging point inside the roadway shifted forward continuously with the increase in inlet air temperature and inlet air relative humidity, and the length of the fog zone expands parabolically in response to these rising conditions.

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Section: Governing Equationsmentioning

confidence: 99%

A Study on the Conditions of Fog Generation and the Change Rule of Fog Zone Length in Air Intake Roadway

Wu,

Zhu,

Zhang

et al. 2024

Sustainability

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“…Mass transfer is influenced by both moisture diffusion and thermal diffusion. Heat transfer and moisture transfer in underground ducts are a coupled unstable process, which is influenced by time, space, inlet state and other factors together [22]. A numerical model was developed to describe simultaneous heat transfer between air and tunnel surfaces while accounting for condensation inside the tunnel [23].…”

Section: Moisture Transfermentioning

confidence: 99%

A Review of Ventilation and Environmental Control of Underground Spaces

2022

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Because of rapid urbanization, traffic problems, and other factors, underground spaces have been used more in the twenty-first century. Large underground spaces are required for underground city, metro, tunnel, mine, industrial and agricultural engineering, and civil air defense engineering. Underground spaces with varying thermal, ventilation, and lighting environments can face problems of comfort, health, and safety. High temperatures, high humidity, difficulty in flue gas emission, harmful microorganisms, radon, and physical and psychological problems are examples of issues. Air quality control technologies for underground spaces, such as ventilation, dehumidification, natural energy utilization, smoke extraction, and ventilation resistance reduction, are discussed. Ventilation for smoke-proofing/evacuation is also extensively addressed.

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“…A numerical and experimental study was performed by Lecoq et al [6] on the evaporation rate in a cold chamber, and in a recent study, the application of CFD modelling to predict the air circulation in an evaporator of a large-scale heat pump was studied by Rogié et al [7] using Ansys Fluent. Yuan Liu et al [8] were able to obtain good agreement between theoretical and numerical simulations, which coupled heat and moisture, but the data were not verified experimentally. In another study, Vojkuvkova et al [9] used CFD modelling to investigate the condensation and freezing of water vapour in a mixing chamber.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Thermofluidic Performance of Climatic Chambers: Numerical and Experimental Studies

Ramezani

Tadeu

Jesus

et al. 2021

Fluids

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Climatic chambers are highly important in research and industrial applications and are used to examine manufactured samples, specimens, or components in controlled environment conditions. Despite the growing industrial demand for climatic chambers, only a few published studies have specifically concentrated on performance analysis and functional improvements through numerical and experimental studies. In this study, a 3D computational fluid dynamics (CFD) model of a climatic chamber was developed using Ansys Fluent to simulate the fluid flow, heat, and mass transfer to obtain the velocity, temperature, and relative humidity fields in the interior box of a 1200 L climatic chamber. The results were then validated with experimental data from a prototype. Finally, the heat losses of the surrounding components of the chamber were calculated, and the relationship between the inside temperature and the overall thermal loss was modelled. This validated numerical model provides the possibility of optimising the performance of climate chambers by reducing the thermal loss from the walls and modifying the air flow pattern inside the chamber.

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Numerical Simulation of Heat and Moisture Transfer in Deep Air Buried

Cited by 7 publications

References 4 publications

A Study on the Conditions of Fog Generation and the Change Rule of Fog Zone Length in Air Intake Roadway

A Study on the Conditions of Fog Generation and the Change Rule of Fog Zone Length in Air Intake Roadway

A Review of Ventilation and Environmental Control of Underground Spaces

Evaluation of the Thermofluidic Performance of Climatic Chambers: Numerical and Experimental Studies

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