相变墙房间夏季夜间通风效果实验

Experimental Study on Night Ventilation Effect in a Phase Change Wall Room in Summer

目的分析相变储能房间夏季夜间通风的降温效果,在节能的前提下提高房间的舒适度.方法笔者将癸酸和月桂酸质量比66∶34的低温共熔物封装到PE管中制作相变储能墙体,吸收夏季夜间室外空气的冷量,以降低白天房间室内温度.结果相变墙房间白天平均温度和温度波动情况都明显优于普通房间,相同通风策略下,相变房间白天降温效果比普通房间更加明显,平均温度降低了2.16℃,相变房间降温幅度是普通房间的2倍.结论在白天使室内与相变墙之间进行气流循环,能更加充分利用相变材料贮存的冷量,维持室内温度;相变储能墙体与夜间通风技术相结合,有助于降低室内白天温度.

The objective of this paper is to analyze night ventilation cooling effect in the phase change energy storage room and improve indoor thermal environment with energy efficiency.Decanoic acid and lauric acid eutectic material with ration of 66：34 were micro-encapsulated in PE pipes to establish a phase change energy storage wall,hence cool energy from outside air at night was absorbed and room temperature decreases in the daytime.Consequently,the average temperature of phase change wall room during the day and the fluctuation were obviously better than the common room.Under the same ventilation strategy,temperature degradation effect for phase change room in the daytime was more obvious and the average temperature decreased 2.16 ℃ which was 2 times the temperature degradation range of the common room.In conclusion,making air circulation between phase change wall and indoor air is conductive to fully using cool energy stored at night by phase change material and maintains the indoor temperature;combination of phase change energy storage wall and night ventilation technology is helpful in decreasing daytime temperature.