顶棚辐射结合下送风供冷系统运行特性实验研究  

An Experiment Study on Operating Characteristics of Radiant Ceiling Cooling Integrated with Underfloor Ventilation System

作　　者：张东亮[1] 蔡宁[1] 黄晓庆[1] 崔晓波[1] 

机构地区：[1]南京工程学院,南京211167

出　　处：《建筑科学》2016年第2期18-22,共5页Building Science

基　　金：国家自然科学基金项目"辐射与对流复合式供冷系统热湿传递动态特性与多目标预测控制研究"(51408302);江苏省高校自然科学研究面上项目"多股混合气流驱动下大空间热分层热迁移机理研究"(15KJD560002);江苏省高校"青蓝工程"项目(2016)

摘　　要：本文基于对室内温度、围护结构内表面温度、风口参数等实测数据,分析了顶棚辐射结合下送风供冷系统运行过程中系统换热量、人体热舒适性变化规律,以及操纵量、扰动量对被控量的影响。研究结果表明:系统净辐射换热量、对流换热量和总换热量在系统开启的前1.5 h内递增,之后趋于稳定,系统稳定时,辐射换热量占总换热量的43%,余下57%冷量由风系统承担,此时,PMV和PPD值均在ISO7730的推荐值范围内。室内空气温度和作用温度随着扰动量和操纵量的增加而增加;当室外空气温度相对较低或较高时,室内发热量或平均水温较低时,室内空气温度和作用温度的增加率较小;室内空气温度和作用温度随着送风温度呈近似线性增加。An experimental study of radiant ceiling cooling integrated with underfloor ventilation system was carried out. Indoor air temperature, building envelope inner surface temperature and parameters of air inlet and outlet were measured. Heat transfer capacity and humane thermal comfort were obtained and the effects of disturbance and manipulated variables on controlled variables were analyzed. The results show that radiant heat transfer capacity, convective heat transfer capacity and total heat transfer capacity increased in the first 1.5 hours and then became stable. Radiant heat transfer capacity accounted for 43% of the total while the rest 57% cooling capacity was supplied by the underfloor ventilation system, and PMV and PPD values fell within the recommended range under stable conditions. The higher indoor air temperature and operative temperature, the higher disturbance and manipulated variables. The increasing ratio of indoor air temperature and operative temperature was relatively small when outdoor air temperature was relatively high or low, or indoor heat quantity or average water temperature was relatively low. Indoor air temperature and operative temperature were in linear proportion to the supply air temperature.

关 键 词：顶棚辐射 下送风 运行特性 实验研究 预计平均热感觉指数 预计不满意者百分数 操作温度 

分 类 号：TU834.8[建筑科学—供热、供燃气、通风及空调工程]