基于数值模拟的实验室气流组织及污染物扩散研究

Study on Air Distribution and Pollutant Dispersion in Laboratory Based on Numerical Simulation

高精度恒温、恒湿实验室对室内环境的要求较高,否则将会导致高精度试验的结果准确度和可信度降低。因此,采用数值模拟的方法,对上海某恒温、恒湿微纳平台空调系统的温湿度、气流速度、压力分布及污染物扩散进行仿真预测。结果表明:设备散热对室内热环境影响较小,但应保证设备与墙壁、设备与设备之间有足够的距离,防止局部过热;架空地板下的回风能使人员产生的污染物迅速地被排至室外。该数值模拟可为实验室的深化设计提供借鉴。

High precision constant temperature and humidity laboratories have stringent indoor environment requirements;otherwise,the accuracy and reliability of high precision test results may decrease.Therefore,numerical simulation is employed to predict the temperature,humidity,airflow velocity,pressure distribution,and pollutant dispersion of the air conditioning system in a constant temperature and humidity micro-nano platform in Shanghai.The results indicate that equipment heat dissipation has minimal impact on the indoor thermal environment,but sufficient distance between the equipment and the wall,as well as between pieces of equipment,should be maintained to prevent localized overheating.Moreover,the return airflow beneath the raised floor effectively discharges pollutants generated by personnel to the outdoors.This numerical simulation provides a reference for the advanced design of laboratories.