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暖通空调杂志社>期刊目次>2019年>第8期

基于CFD技术的空气处理机组温度分层优化设计

Temperature stratified optimization design of air handling units based on CFD technology

燕娜 马丽强 严瀚
维谛技术有限公司

摘要:

总结了空气处理机组(AHU)温度分层的危害,并分析了温度分层产生的原因。应用CFD技术对AHU的混风模式进行了流动与传热的仿真分析,结果显示,温度分层现象与实测结果吻合良好,在此基础上提出了混风模式气流组织设计的要点。通过在混风腔增加异形挡板的办法,减小了送风温差,且系统阻力的增幅小,获得了较为理想的混合效果,并投入到实际应用中。对冷热混风腔的设计提出了3种优化方案并进行了仿真计算,计算结果表明混风效果良好。

关键词:计算流体动力学,空气处理机组,温度分层,混风模式,优化设计

Abstract:

Summarizes the temperature stratification influence of AHU, and analyses the causes of temperature stratification. Simulates the flow and heat transfer of mixed air mode in the AHU by CFD technology. The results show the temperature stratification matching test results very well. Based on the simulation results, puts forward the key points of  mixed air distribution design. By adding special-shaped baffles in the mixing chamber, and the temperature difference of air supply is reduced, with the smallest system resistance increase, and obtains an ideal mixing effect and puts into practical application. Proposes and simulates three optimization schemes for the design of cold and hot mixing chamber, and the results show a good mixing effect.

Keywords:computationalfluiddynamics(CFD),airhandlingunit(AHU),temperaturestratification,mixedairmode,optimizationdesign

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