低温地板辐射采暖预见性间歇运行特性的研究

本文针对采用辐射采暖系统的房间,采用UDF(User Define Function)嵌入数值模拟软件FLUENT方法进行模拟。根据我国夏热冬冷地区(长沙)冬季昼夜温差大的特殊气候,考虑室外温度波动,提出预见性的间歇运行方案,并模拟计算不同运行参数下间歇运行所带来的房间温度变化情况。研究表明:在夏热冬冷地区,室内温度受室外温度波动影响显著,在该地区设置间歇运行策略应根据室外逐时综合温度变化趋势来决定,考虑到地板的预热过程,进行预见性提前开机可以满足室内热舒适需求,并且节约能源。

A Parametric Study on Predictive Control of Intermittently Operated Radiant Floor Systems

A numerical analysis,UDF(User Define Function)cooperated,is carried out for the RFH(Radiant Floor Heating)system,and a predictive control strategy for improving the energy efficiency of intermittently heated RFH system is explored.The study focused on the indoor air temperature fluctuated by intermittent operation of RFH system and system energy consumption.The results are:the indoor temperature variations significantly affected by the outdoor temperature in the Hot Summer and Cold Winter zones of China;setting up the intermittent operation strategy in these zones should be based on the outdoor temperature fluctuations;the RFH system's significant preheating process should be taken into account as well;predictive control considered the outdoor temperature variations can meet the thermal comfort and reduce the energy consuming.