外文翻译----高层住宅大厦中地板辐射采暖的控制方法.docx

外文资料及译文The Control Methods for Radiant Floor Heatingin High-Rise Residential BuildingAbstractHigh-rise residential building should cope with the fluctuating thermal load by accurate control because the thermal load of each zone varies so widely with the time.In order to find the accurate control method for the building, this study classified the current control methods into supply water temperature control, supply water flow rate control and supply water temperature plus flow rate control. And the comparative experiments on control methods were conducted in a test cell and the control performances were evaluated by analyzing room air temperature, surface temperature and rising time of room temperature.The fluctuation of the room air temperature is reduced when the outdoor reset control is used with on/off control. The rising time of room air temperature is the shortest when on/off pulse width modulation control is applied during the heating start-up period. keywords: radiant floor heating, control method, high rise residential building1. IntroductionIn korea, many high-rise buildings are constructed in these days due to the rapid economic development and the high population densities.And as the living standards are becoming more and more improved, the request for indoor environmental quality has become key issues for both the residents and estate developers.However, the building is exposed to the severe outdoor condition since the wind speed and solar radiation increase as the building grows higher and the outdoor conditions in the upper atmosphere are more severe than those observed at the ground level.For this reason, heating load is bound to fluctuate and increase severely in winter. So this difference cannot be ignored for heating system design and indoor comfort (kumar 1997). Furthermore, high-rise building generally gets rid of the balcony to enlarge the available floor area, and comprises a central core and housing units to have more external walls and windo