1、外文资料及译文 The Control Methods for Radiant Floor Heating in High-Rise Residential Building Abstract High-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
2、 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 perf
3、ormances 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 p
4、ulse width modulation control is applied during the heating start-up period. keywords: radiant floor heating, control method, high rise residential building 1. Introduction In korea, many high-rise buildings are constructed in these days due to the rapid economic development and the high population
5、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 increa
6、se 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 c
7、omfort (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 windows for daylight and ventilation. Consequently, the room air temperature and the heating load
8、 of the building fluctuate transiently in winter due to the absence of buffer space. In korea, radiant floor heating system is generally adopted in residential building (kim 2003) with the simple on/off control method If the simple control is applied to the high-rise building, the control system cou
9、ld not respond the change of the heating load and cause the over-heating or under-heating conditions. Inorder to achieve the comfort and energy saving inhigh-rise residential building, it is required to search for the accurate control method that is suitable to the characteristics of high-rise resid
10、ential building. In this study, the heating load of high-rise residential building was analyzed and compared with that of low-rise residential building by transient simulation. And the control methods that can provide accurate control for radiant heating system were studied through the experiments.
11、The control methods were compared with one another from the view point of the stability of room air temperature, floor surface temperature and the rising time of room air temperature during the start-up time. 2. The Heating Load Analysis 2.1 Characteristics of high-rise residential building In high-
12、rise residential building, air tight curtain wall system is adopted to prevent excessive infiltration and the depth of the slab decreases to lighten the structure of the building. So heat storage capacity of the structure can be lowered. As shown in Fig.1, compared with low-rise residential building
13、, high-rise residential building has no balcony that functions as a shading device or thermal buffer, and comprises a central core and residential units extending outward from the core in several directions to have more external walls and windows for day light and ventilation. Also, although facing
14、south has been the favorable building orientation to provide an exterior view and solar right to the occupants in low-rise residential building, eastern and western envelope is typically designed with double glazing windows in high-rise residential building. Because of this envelope design, the heat
