风机盘管加新风系统中室内污染物浓度分布

Distribution of the contaminant concentration in rooms with fan-coil units and fresh air supplies

为解决风机盘管加新风系统中送风浓度未知的问题 ,提出了一种计算风机盘管加新风系统中污染物浓度分布的方法。该方法将空间各点的浓度分成两部分 :一部分来自送风口 ,通过引入稳态可及性的概念 ,建立了进出口浓度关系的方程组 ;另一部分来自房间内的污染源 ,用房间基准浓度求解。通过对一个具体的风机盘管加新风房间中两种典型回风形式算例的模拟分析 。

An algorithm was developed to calculate the contaminant concentration distribution in rooms with fan-coil units and fresh air supplies where the supply air contaminant concentration is unknown. The algorithm divided the contaminants in any point in the room into two parts: the contribution from inlets and the contribution from sources. The contribution from inlets was calculated from the inlet concentrations and the supply air flow field. The contribution from sources was defined as a base concentration. The contaminant concentration distributions were simulated for two typical return air modes for a room with a fan-coil unit. The feasitility of the algorithm was demonstrated in a case room.