Study on Designing and Installation Effect of Fresh Air Load Reduction System by using Underground Double Floor Space - Proposal of Numerical Model coupled Heat and Moisture Simultaneous Transfer in Hygroscopic -

지열을 이용한 공조외기부하저감(空調外氣負荷低減) 시스템의 설계 및 도입 효과에 관한 연구 - 증기 확산지배에 의한 열수분 동시 이동 수치모델의 제안 -

This paper presents a feasibility study of a fresh air load reduction system by using an underground double floor space. The fresh air is introduced into the double slab space and passes through the opening bored into the footing beam. The air is cooled by the heat exchange with the inside surface of the double slab space in summer, and heated in winter. This system not only reduces sensible heat load of the fresh air by heat exchange with earth but also reduces latent heat load of the fresh air by ad/de-sorption of underground double slab concrete. In this paper, we used a model for evaluation of fresh air latent heat load reduction by hygroscopic of air to earth exchange system taking into account coupled heat and moisture transfer of underground double floor space. In conclusion it shows the validity of the proposed method for a design tool and the quantitative effect of the system.