Journal of the Architectural Institute of Korea Planning & Design (대한건축학회논문집:계획계)

Architectural Institute of Korea (대한건축학회)
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A Study on the Thermal/Airflow Characteristics of an Apartment House with a Natural Supply and Mechanical Exhaust System

자연급기-강제배기 환기시스템을 적용한 공동주택의 환기에 따른 실내 온열 및 공기환경 특성

  • 김무현 (울산대학교 기계공학부) ;
  • 황지현 (울산대학교 대학원 기계공학부)
  • Received : 2011.10.13
  • Published : 2012.04.25
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Abstract

A hybrid ventilation system, composed of a natural supply inlet and mechanical exhaust, was predicted numerically for an apartment. Analysis was performed using Computational Fluid Dynamics (CFD) for ventilating flow rate of $60m^3/h$ for the living room-kitchen region and $180m^3/h$ for the whole apartment region. The heating period chosen in this study reflects how residents are usually exposed to poorer indoor environments in winter. An effort was made to create acceptable residential comforts regarding air current, temperature and $CO_2$ concentration distributions. The results show that an ACH of 0.7 or greater seems to be a reasonable value for the permissible minimum ventilation flow rate in occupied zones. The results also show that for a ventilating flow rate of $60m^3/h$, some acceptable criteria are satisfied and residents achieve comfort. In case of the whole region with $180m^3/h$ and 288K, however, residents no longer feel as comfortable with regard to thermal conditions and energy losses occur.

Keywords

Acknowledgement

Supported by : 울산대학교

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