Analysis of the Energy Consumption in Underfloor Air Distribution System depending on Outdoor Air Intake Rates

외기 도입에 따른 바닥급기 시스템의 에너지 사용량 분석

  • 김동희 (서울시립대학교 건축학부) ;
  • 허정호 (서울시립대학교 건축학부) ;
  • 조동우 (한국건설기술연구원 건축.도시연구부) ;
  • 유기형 (서울시립대학교 건축학부) ;
  • 유지용 ((주)한일엠이씨 부설인구소)
  • Published : 2006.06.21


In this paper, we discussed the energy performance of underfloor air distribution(UFAD) and overhead air distribution system according to outdoor air intake rates in a office building. For this, the laboratory(S lab.) is selected for measuring the thermal environments of UFAD system and overhead system. Based on the measured data, the TRNSYS simulation is used to evaluate the energy performance of UFAD system and the overhead system according to outdoor air intake rates. By increasing outdoor air intake rates from required outdoor air intake rates(100CMH) to maximum air intake rates, the energy savings of UFAD system comparing with overhead system are varied $15%{\sim}25.6%$ in summer, $12.8%{\sim}19%$ in fall/spring and not varied in winter(8%). As results of simulations on stratification height and cooling set temperature, the lower the stratification height and the higher cooling set temperature, the larger cooling energy savings of UFAD comparing with overhead system according to outdoor air intake rates.