• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.215-215
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• 2007

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.28 no.6
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• pp.433-442
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• 1999

기원전 27세기경, 고대 이집트의 피라미드건설을 위해 앗시리아 지방에서 나일강변으로 이주한 기술자들의 집합주택에는 거의 환기구가 설치되어 있었다는 기록이 있다. 이 환기방법은 실내와 실외의 기온차에 의한 공기의 부력을 이용한 중력환기로 생각된다. 중력환기는 지금도 주물공장 등의 고온, 발열을 수반하는 작업장에서 적용되고 있으며, 이와 같이 자연력을 이용한 환기를 자연환기라 부른다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.3
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• pp.463-469
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• 2009

We performed the experimental study on the control of suspended dust in a cement packaging process for various ventilation systems. To effectively remove the dust generated in the cement packaging process, three different kinds of ventilation system, such as local exhaust ventilation, electrostatic scrubber, and local air supply system, were adopted. Dust concentrations in the packaging process were measured with the variation of the airflow rate of the ventilation systems and then their ventilation performance were evaluated. From the results, we knew that the ventilation performance was the best when the local exhaust ventilation and the electrostatic scrubber were simultaneously operated in the packaging process. In the electrostatic scrubber system, the effect of the airflow rate on the indoor dust removal efficiency was negligible so hat he system ust be operated at $2,700m^3/h$ for saving power consumption.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.13 no.5
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• pp.321-332
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• 2001

In this study, a design program for ventilation requirements of a longitudinal raod tunnel were developed and investigated. The control volume method was applied to calculate the local air velocity and the local concentration distribution of pollutants, CO, $NO_x$, soot along the tunnel for various tunnel ventilation system. This program was validated by comparing with the practical design data for the road tunnel ventilation system. The calculation results were in good agreement with the practical design data.

• 산업보건소식
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• no.27
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• pp.15-18
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• 1986

• 월간산업보건
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• s.252
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• pp.30-35
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• 2009

• 월간산업보건
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• s.251
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• pp.36-41
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• 2009

• Proceedings of the SAREK Conference
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• 2007.11a
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• pp.594-599
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• 2007

This study represents numerical analysis on the fluid flow and concentration characteristics by scattering fume at push-pull ventilation system. And the principal point is making optimum on improve an existing ventilation system. This phenomenon simulated about local ventilation system by using commercial CFD tool and base on these fact has find improvements. Advanced model shows most low different pressure and velocity which are suction capability at inlet surface of pull hood has most uniformity. When compared with existing model, Improved model has more good ventilation performance.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.21 no.4
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• pp.260-265
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• 2009

The aim of this study is to remove crack on a ventilation device at the suction part of zinc plating factory, and the main point is making optimum configuration by improving an existing hood system. The result shows that existing hood system has problem with duct configuration, angle and reducer. Model-5 shows lowest pressure difference as meaning of suction capability. The hood inlet surface has most uniform suction capability.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.29 no.2
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• pp.63-67
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• 2017

The purpose of this study is to analyze the Age of Air and the Local Air-change Effectiveness of by field measurement. The indexes of Age of Air and Local Air-change Effectiveness are used to analyze the local ventilation effectiveness of multiple locations and are mainly evaluated using the computational fluid dynamics (CFD) method. In this study, measurement of the Local Air-change Effectiveness was based on ASHRAE 129. The performance of Local Air-change Effectiveness and the dependence of the outlet location on Local Air-change Effectiveness were analyzed. The results showed that a greater air-change rate (ACH) may not guarantee better local ventilation effectiveness.