Study on the Upper Flange Width on Grinding Worktable and Its Ergonomics Evaluation

Chen, Jianwu; Sun, Yanqiu; Zhang, Xiaolei; Chen, Zhenfang; Yang, Bin; Liu, Weijiang

doi:10.1007/978-981-13-8779-1_94

Cited by 8 publications

(2 citation statements)

References 6 publications

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“…As the surface of the lower exhaust hood is close to contaminants, the collection efficiency is higher than that of other types of exhaust hoods, especially when the contaminant density is higher than that of air, and there is no heat source. Accordingly, the lower exhaust workbench has a wide range of applications, such as the purification of vaccines and polishing [ 4 ]. If the lower uniform air–exhaust hood is combined with a uniform air supply hood to create parallel push–pull ventilation, this has a better contamination control effect and a wider range of applications [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Internal Structure Type of a Large-Area Lower Exhaust Workbench on Its Surface Air Distribution

Chen

Jin

Yang

et al. 2022

IJERPH

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Local exhaust ventilation is an important method of contamination control, and the type of exhaust hood and the air distribution at the hood face have an important influence on the contamination control effect. When the hood face is large, it is difficult to create a uniform airflow distribution at the hood face, which if achieved, could improve the effect of contamination control. To that end, the large-area workbench used in the process of vaccine purification was taken as the research subject prototype for this study. According to the methods for generating a uniform airflow distribution at the hood face, the lower exhaust workbenches of four structures were established using CAD and simulated using Ansys Fluent. The best uniformity of workbench surface air distribution was with Structure-4, while the worst was with Structure-1. The workbench surface airflow distribution could not achieve uniformity when only an inclined bottom was used for the large-area lower exhaust workbench with one side outlet. The more internal slits there were, the greater the air distribution area and the more uniform the air distribution. The width of the area of workbench surface airflow distribution was determined by the width of the slits. The numerical simulation results were verified by experiments, which showed them to be credible.

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Section: Introductionmentioning

confidence: 99%

Influence of the Internal Structure Type of a Large-Area Lower Exhaust Workbench on Its Surface Air Distribution

Chen

Jin

Yang

et al. 2022

IJERPH

Self Cite

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show abstract

“…Ventilation is an important methods to control contaminants in workplaces [ 1 , 2 ]. Compared with local exhaust ventilation, push-pull ventilation has better contaminants control due to increased air supply [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Changing Patterns of the Flow Ratio with the Distance of Exhaust and Supply Hood in a Parallel Square Push-Pull Ventilation

Chen

2022

IJERPH

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The method of flow ratio k is often used for designing parallel push-pull ventilation. The k value is mostly selected empirically and is difficult to determine accurately, resulting in an imprecise design of the push-pull ventilation system. Therefore, parallel push-pull ventilation was taken as the research object in this paper. The push-pull ventilation studied consists of a square uniform supply hood and a square uniform exhaust hood, and the side length of pull hood and pull hood was same. A workbench was set between the push hood and pull hood, and the source of toluene pollutions was set in the center of the worktable surface. The optimal k values for different distances between push hood and pull hood were studied by numerical simulation using Ansys Fluent, which were obtained base on the distribution of wind speed and toluene concentration. The results showed that parallel push-pull ventilation is not suitable for applications when L/a ≥ 6. The changing patterns of k value with L/a is proposed in the range of 1.5 ≤ L/a ≤ 5 for the parallel square push-pull ventilation, which can be used to estimate k value relatively accurately under the condition that L/a is known, so as to guide the determination of the exhaust air volume of the parallel push-pull ventilation system.

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Research on the Uniform Air Supply Technology of the Static Pressure Chamber in a Spray Room

Chen

Bai

Yang

et al. 2020

Man-Machine-Environment System Engineering

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Study on the Upper Flange Width on Grinding Worktable and Its Ergonomics Evaluation

Cited by 8 publications

References 6 publications

Influence of the Internal Structure Type of a Large-Area Lower Exhaust Workbench on Its Surface Air Distribution

Influence of the Internal Structure Type of a Large-Area Lower Exhaust Workbench on Its Surface Air Distribution

Changing Patterns of the Flow Ratio with the Distance of Exhaust and Supply Hood in a Parallel Square Push-Pull Ventilation

Research on the Uniform Air Supply Technology of the Static Pressure Chamber in a Spray Room

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