顶板辐射供冷空调房间结露的防控研究

Prevention of Condensation in Room with Cooling Radiant Ceiling Panel System

本文利用EnergyPlus软件对辐射顶板供冷空调系统进行建模,并在西安市天气条件下对系统供冷性能和结露情况进行模拟研究。结果表明,室内无人时,辐射系统不存在结露风险。室内有1人,2人和3人时,均存在结露风险,且随着人数增多,结露风险增加,室内操作温度失控时间也更加提前。4种情况下,系统供冷量分别为90.7 W/m^2,91.7 W/m^2,85.3 W/m^2和79.5 W/m^2。之后,对于存在结露风险的室内有1人,2人和3人的情况,研究表明加入机械通风且当通风量分别达到25.2 m^3/h,90.1 m^3/h和180.2 m^3/h时,均能避免结露现象发生。

EnergyPlus was used to model a chamber with CRCP system,and the operational situations were simulates under the weather conditions of Xi’an.The cooling performance of the CRCP system and possibility of condensation were discussed.Results indicated that there existed condensation risks in the cases with 1-occupant,2-occupant and3-occupant,except the case of with no occupant inside the room.As the number of the occupants increased,the risk of condensation increased,and the time span of indoor operative temperature lost of control gradually increased.The cooling capacity of the system was 90.7 W/m^2,91.7 W/m^2,85.3 W/m^2 and 79.5 W/m^2,respectively in the afermentioned cases.Subsequently,introducing mechanical ventilation for the case with 1-occupant,2-occupant and 3-occupant can prevent the risk of condensation from occurring when the ventilation rate reached 25.2 m^3/h,90.1 m^3/h and 180.2 m^3/h,respectively.