夏季化学实验室冷热复合通风空调系统的温度分布数值模拟

Numerical Simulation of Temperature Distribution in a Cold-Heat Combined Ventilation and Air-conditioning System in Summer Chemistry Laboratory

化学实验室冷热复合通风空调系统可以有效降低能耗,实现能效提升。为了对其温度分布进行研究和分析,建立了化学实验室冷热复合通风模型,利用Fluent 2020 R2软件对该模型进行数值模拟。在冷热空气送风温度和送风量比例保持不变的情况下,分析送风量的变化对温度分布的影响。定量选取28℃临界温度层位置作为评价指标,结合气流组织分析可知,当送风量减小时,临界温度层无法完全覆盖人员活动区域的风险有所提高,为夏季化学实验室冷热复合通风空调系统的设计运行提供了参考和支持。

The cold-heat combined ventilation and air-conditioning system in the chemical laboratory can significantly reduce energy consumption and achieve efficiency improvement.In order to study and analyze its temperature distribution,a cold-heat combined ventilation model in the chemical laboratory was established and Fluent 2020 R2 software was used to this model.Under the condition that the ratio of hot and cold air supply volume and the supply air temperature remain unchanged,the influence of the change of air supply volume on the temperature distribution is analyzed.The location of 28℃critical temperature layer is selected as the evaluation index.Combined with the analysis of air distribution,the risk that the critical temperature layer can not completely cover the personnel activity area is increased when the air supply volume is reduced.It provides reference and support for the design and operation of the cold-heat combined ventilation and air-conditioning system in summer chemical laboratory.