辐射供冷空调系统间歇运行启动阶段特性分析

针对南京某住宅房间的毛细管辐射供冷空调系统,研究房间空调系统在间歇运行情况下启动段的特性,探究室内空气预理模式、毛细管辐射面积、送风量对室内温湿度的动态影响规律。研究结果表明,基于连续运行模式下的设备设计容量不能满足间歇运行的要求,需要增大辐射毛细管和新风机的处理能力。采用新风机内循环和新风2种运行模式,可有效缩短间歇运行启动阶段时长。增加新风机送风量可减少预处理时间,通过改变毛细管的辐射面积和新风机的送风量可以满足夏热冬冷地区居住建筑间歇运行的需求,为后期设计同类型的建筑提供新的思路。

Start-up Period Characteristics of the Intermittent Operated Radiation Cooling Air Conditioning System

Based on a residential room in Nanjing, the dynamic characteristics of the intermittent operated capillary radiation cooling air -conditioning system in the start -up period were studied. The dynamic effect of several factors on the indoor air temperature, including the mode of indoor air pretreatment, the area of capillary radiation as well as the volume of supply air, were analyzed by simulation. The results show that, the design capacity under continuous operation mode cannot meet the requirements of the intermittent operation. The air handing capacities and the fresh air processor should be increased. The start- up period can be shortened by adopting the two operation modes of the fresh air processor proposed, that is, the inner circulation mode and the total fresh air mode. The air pretreatment time can be saved by increasing the air volume in the fresh air processor. Changing the radiation area of the capillary air supply and air volume of air machine can meet the demand of the intermittent operation of residential buildings in hot summer and cold winter area, providing a new way of thinking for the design of the same type of building in future.