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暖通空调>期刊目次>2021年>第10期

CFD模拟及有限元分析在大型气候实验室动态负荷计算中的应用

Application of CFD simulation and finite element analysis to dynamic load calculation of large climate laboratories

申 剑 傅建勋 刘银萍
中国航空规划设计研究总院有限公司

摘要:

气候实验室属于特殊建筑,具有室内温度随着工艺要求变化且变化幅度大的特点,所以常规的稳态负荷计算方法和依据室外环境规律变化的动态负荷计算方法不适用。针对某工程,根据工艺需求和送风量、送风温度,利用CFD模拟室内空气温度、围护结构温度,利用有限元分析计算每个时刻围护结构热流密度,从而得出了瞬时非稳态负荷的计算方法。根据该方法计算结果设计的工程,运行效果良好,满足了使用要求。

关键词:气候实验室,暖通空调系统,负荷计算,热流密度,非稳态负荷,CFD模拟

Abstract:

The climate laboratory is a special building, which has the characteristics that the indoor temperature changes at any time with the process requirements, so the conventional steady-state load calculation method and the dynamic load calculation method based on the change of outdoor environment law are not applicable. For a project, according to the process requirements, air supply volume and air supply temperature, applies CFD to simulate the changes of indoor air temperature and envelope temperature. Calculates the heat flux density of envelope at each time by finite element analysis, so as to obtain the calculation method of instantaneous unsteady load. The project designed according to the calculation results of this method has good operation effect and meets the application requirements.

Keywords:climatelaboratory,HVACsystem,loadcalculation,heatfluxdensity,unsteadyload,CFDsimulation

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