贴附射流变新风运行模式下冷辐射板结露特性研究  

Simulation study on condensation characteristics of cold radiant panel in the operating mode of attached jet variable fresh air

作　　者：周璇玉 丁云飞[1,2] 邓燕 ZHOU Xuanyu;DING Yunfei;DENG Yan(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;Guangdong Provincial Key Laboratory of Building Energy Efficiency and Application Technologies,Guangzhou 510006,China)

机构地区：[1]广州大学土木工程学院,广州510006 [2]广州大学广东省建筑节能与应用技术重点实验室,广州510006

出　　处：《流体机械》2021年第9期20-25,40,共7页Fluid Machinery

基　　金：国家自然科学基金资助项目(51878187)。

摘　　要：通过建立人体散湿模型,对冷辐射板结合诱导式新风口系统进行CFD瞬态模拟,分析室内人员变化,变新风量运行时新风贴附射流长度与贴附层内空气露点温度变化特性,探讨冷辐射空调中新风量动态调节规律,在满足卫生要求和不结露的同时,实现系统的运行节能。研究结果表明:在设计人数条件下,通过监测CO2浓度可使新风量在80%~100%范围内间歇调节;当室内人数减少时,可降低新风量,当新风量降低至室内除湿所需新风量时,应根据贴附层露点温度上升的速率适当调节新风量大小。CFD transient simulation model of human moisture diffusion was established to study combinations of cold radiant panel and induced fresh air inlet,analyze the fresh air attached jet length and dew point temperature change characteristics when the number of indoor personnel and the fresh air volume changes,and investigate the dynamic adjustment law of fresh air volume in cold radiant air conditioners in order to realize the energy-saving operation of the system while meeting sanitary and noncondensing requirements.Simulation results show that under the condition of the designed number of people,the fresh air volume can be adjusted intermittently within the range of 80%~100%by monitoring the CO2 concentration.When the number of indoor people decreases,the fresh air volume can be reduced.When the fresh air volume is reduced to the fresh air volume required for indoor dehumidification,the fresh air volume should be adjusted appropriately according to the rising rate of the dew point temperature of the attached layer.

关 键 词：冷辐射板 变新风量模式 CFD 贴附层 露点温度 

分 类 号：TH12[机械工程—机械设计及理论]