送风方式对文物保存展柜微环境气流分布的影响

Impact of inlet airflow pattern on the showcase microenvironment in museums

为研究不同送风气流组织形式对博物馆内文物展柜微环境的影响,采用数值模拟的方法对博物馆内卧式和立式展柜不同形式的下送下回通风方式进行数值模拟。结果表明,下送下回的送回风方式能够减少冷量且气流在内部区域有效混合扩散。送风口设置在长度方向中心时,气流在展柜内可以充分混合。送风口必须设置在宽度方向时,采用小流量可以有效在整个空间扩散,形成充分的空气环流。如果展柜内有热源,简单通过增加风量的方法并不能有效降低温度,送风特性需进一步研究。

Aiming to investigate the impact of various inlet airflow patterns on the microenvironment of exhibition cabinets in museums, this study used Computational Fluid Dynamics （CFD） to simulate the airflow and tempera- ture field for horizontal and vertical cabinets with down - supply down - return air flows. The results show that the inlet pattern in down - supply clown - return cabinets feature both economy of energy and effective mixing, as well as good dispersion within the cabinet. When the air inlet was in the middle, in cabinets with long orientations, the air could mix thoroughly and meet design requirements. When the inlet was located on the wide orientation, a low airflow rate could disperse in the entire space fairly well, resulting in sufficient air circulation. However, when there was a heat source in the case, simply increasing the air flow rate was not sufficient to reduce the temperature inside effectively. The air flow pattern in this situation needs to be further investigated.