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Application of CFD in retrofitting air-conditioning systems in industrial buildings

机译：CFD在工业建筑空调系统改造中的应用

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摘要

This paper presents a practical case study using the computational fluid dynamics (CFD) technique in retrofitting the large cabinet fans and airflow channels in malt processing air-conditioning systems in order to get uniform airflow field, to increase fan capacity and reduce energy consumption. Site measurements were used to validate the models before they were used. CFD simulation results were used to evaluate and optimise the design and construction of splitter vanes in the airflow channels and scrolls of the fans. Simulation tests showed that the fan capacity (maximum total air flow rate delivered at full fan speed) could be increased by 8.3-20% using different shapes of scroll, and 30-34% by adding splitter vanes further in the airflow channels. After retrofitting the fans and airflow channels, site measurements showed that the fan capacity increased 21-24 and 28-29%, respectively in the two buildings validated. The approach of using the CFD technique in the retrofitting, the simulation results, and the site measurements before and after fan retrofitting are presented and compared in this paper.
机译：本文介绍了使用计算流体力学（CFD）技术改造麦芽加工空调系统中大型橱柜风扇和气流通道的实际案例，以获取均匀的气流场，增加风扇容量并降低能耗。在使用模型之前，使用现场测量来验证模型。 CFD仿真结果用于评估和优化气流通道和风扇涡旋中分流叶片的设计和构造。仿真测试表明，使用不同形状的涡旋，风扇容量（在全风扇速度下可提供的最大总空气流量）可以增加8.3-20％，通过在气流通道中进一步添加分流叶片可以使风扇容量增加30-34％。改造风扇和气流通道后，现场测量表明，在经过验证的两座建筑物中，风扇容量分别增加了21-24％和28-29％。本文介绍并比较了在风机改造前后使用CFD技术进行改造的方法，模拟结果以及现场测量。

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