| Title |
A Study on Ventilation Effectiveness in the Non-isothermal Supply using Mixing and Displacement Ventilation Systems |
| Authors |
이재근 ; 강태욱 ; 윤석구 ; 구재현 ; 한정균 ; 조민철 |
| Keywords |
Ventilation effectiveness ; 환기효율 ; Room mean age ; 실평균 공기령 ; Non-isothermal supply ; 비등온 급기 ; Mixing ventilation ; 혼합환기 ; Displacement ventilation ; 변위환기 ; Air exchange rate ; 환기 |
| Abstract |
The objective of this research is to analyze the ventilation effectiveness in the non-isothermal air supply using mixing and displacement ventilation systems for indoor air quality control and management. In this study, a ventilation effectiveness is evaluated in a simplified model chamber using a tracer gas technique of CO2 gas injected into a supply duct as a function of ventilation rates, supply/extract sites and cooling/heating air supply. The ventilation effectiveness decreased with increasing ventilation rate on the cooling and heating conditons. And the ventilation effectiveness of case 3 (down supply and upper extract) was better than that of case 1 (upper supply and upper extract) and case 2(upper supply and down extract) with the cooling supply conditions. But for the heating supply air conditions, the ventilation effectiveness of case 2 was better than that of case 3 and case 1. |