초장대 해저터널 환기유니트의 적용성 및 성능 개선 연구
A Study on the Applicability and Performance Improvement for Air Distribution Unit of Long Subsea Tunnels
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초록
가상설계가 진행중인 호남～제주간의 터널은 터널내 승객 및 작업자에게 쾌적한 환경을 제공하기위해 필요풍량을 서비스터널을 통해 본선터널로 제공하는 환기시스템을 채택하였으며, 이러한 환기시스템을구성하기 위해서는 환기유니트의 설치가 필요하다. 본 연구에서는 터널내의 고속기류 활용 및 기류유인 효과측면에서 환기유니트의 성능평가 및 개선 연구를 수행하였다. 이러한 연구를 바탕으로, 벤츄리 및 코안다 효과를이용한 환기유니트가 초장대 해저터널의 환기를 위해 충분히 적용가능함을 확인하였고, 벤츄리형 환기유니트의경우 340% 이상, 코안다형 환기유니트의 경우 450% 이상, 환기성능을 개선시킬 수 있는 것으로 분석되었다.
Abstract
The Honam-Jeju tunnel, that is currently in progress by virtual design, has adopted a ventilation system, which supplies fresh air to main tunnel via service tunnel for the comfortable environment of passengers and tunnel personnel. This ventilation system requires Air Distribution Unit(ADU). In this study the performance of ADU was evaluated and the way to improve ADU was studied, in tetms of air induction effect by high speed of air stream. As a result, it was identified that ADU employing Venturi effect and Coanda effect is applicable to the ventilation of long subsea tunnel. It was analyzed that the ventilation performance is improved by more than 340% with Venturi type unit and more than 450% with Coanda type unit.
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