太阳辐射影响下地板供暖室内环境与控制策略优化

Indoor Environment with Heating FloorAffected and Optimization of Control Strategy under Solar Radiation

目的 研究太阳在辐射供暖地板室内的照射特点以及利用太阳辐射优化供暖策略。方法 利用CFD建立数值模型模拟太阳在室内的投影位置和室内温度场,实验测量太阳辐射强度和室内热环境参数,评估冬季辐射地板的供暖效果和室内环境温度。结果 太阳辐射在地板表面形成投影区,区域内外温度不均匀,两区域温差大于15℃,但工作面温度分布较均匀;室内各环境参数随太阳辐射强度改变而规律性变化,峰值延迟出现,太阳辐射使室内空气温度和平均辐射温度提升9~10℃。结论 辐射地板供暖房间可有效利用太阳辐射能量以降低供暖系统总供暖量,辐射地板设定供暖温度可降低6℃,供暖系统总供暖量降低47 kW;可根据太阳辐射变化规律调整设定地板温度,以避免房间过热,在满足室内热环境需求的同时减少供暖量降低能耗。

To study the characteristics of solar radiation in radiant heating floor room and optimize the heating strategy using solar radiation,this paper established a numerical model to simulate the sun′s projection position on the indoor floor and indoor temperature field,experimentally measured the solar radiation intensity and indoor thermal environment parameters,and evaluated the heating effect of radiant floor and indoor environmental temperature in winter.The analysis shows that the solar radiation forms a projection area on the floor surface,and the temperature inside and outside the area is not uniform.The temperature difference between the two areas on the floor surface is greater than 15℃,but the temperature distribution uniformity on the working face is still good.Indoor environmental parameters change regularly with the change of solar radiation intensity and have a delayed effect.Solar radiation increases indoor air temperature and mean radiation temperature by 9-10℃.In this paper,the radiant floor heating room can effectively use the solar radiation energy to reduce the total heating capacity of the heating system.The radiant floor′s heating temperature can be reduced by 6℃and the total heating capacity of the heating system can be reduced by 47 kW.In order to avoid overheating and meet the demand of indoor thermal environment,the floor setting temperature can be adjusted according to the changing law of solar radiation,which can meanwhile reduce the amount of heating and energy consumption.