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本文以内设空气载能辐射空调系统的某火车站候车厅为研究对象,利用FLUENT数值模拟的方法,分析研究了房间人体活动区域内空气工况参数和系统传能过程。模拟结果显示,该房间室内空气温湿度分布较均匀,未出现结露现象。且在传能过程中,系统总冷负荷约为119 KW,空气载能辐射空调系统承担92%的冷负荷;其中,辐射换热占房间总负荷64.2%,对流换热占29.1%,由此可得系统以辐射换热为主;相较于金属平板辐射空调系统,该系统新增的对流换热量包括载能空气与辐射孔板间的对流换热量以及循环流动的交换能量;经计算,在相同模拟条件下,该系统总换热量较金属平板辐射空调系统超出约10%以上。综上,该系统在理论上基本符合高大空间建筑夏季负荷大,强调舒适节能的要求。
In this paper, the air-conditioned radiant air conditioning system inside a train station waiting room for the study, the use of FLUENT numerical simulation method to analyze the human activities in the room air condition parameters and system energy transfer process. Simulation results show that the indoor air temperature and humidity distribution of the room more uniform, there is no condensation. In the process of energy transfer, the total cooling load of the system is about 119 KW, and the air-borne radiation air-conditioning system takes up 92% of the cooling load. Among them, radiation heat transfer accounts for 64.2% of the total room load and convection heat transfer takes up 29.1% The system is mainly radiant heat transfer. Compared with the metal plate radiation air-conditioning system, the new convective heat transfer of the system includes the convective heat transfer between the carrier air and the radiation plate and the exchange energy of the circulating flow. Calculated, under the same simulation conditions, the total heat exchange capacity of the system is more than about 10% more than the metal plate radiation air-conditioning system. In summary, the system is basically in line with the large summer summer construction load, emphasizing the requirements of comfort and energy saving.