冷库库门的非稳态RANS模型渗风研究

发布时间：2018-05-27 01:20

本文选题：冷库 + 渗风　；参考：《制冷学报》2017年03期

【摘要】：伴随冷库总量的快速增长,冷库的能耗问题已越来越受到关注。库门渗风作为冷库的一项占比很大的热负荷是冷库能耗研究的一个重点。本文采用非稳态RANS模型对库门渗风建立了动态模拟模型,利用对一座库高和门高之比为2∶1的冷库,在不同库内外温差和冷风机运行模式下,验证实测数据结果表明:所建模型预测的渗风量、测量点当地风速和温度的数值和变化趋势都与实验值有较好的吻合,在开门时间40 s内时,渗风量模拟误差在±10%以内。利用该模型对渗风的特性和机理进行了模拟分析,结果表明,受风机水平方向风场影响,风机开时库内温度均比风机关时低。库内外空气密度差较小,库内冷空气受重力的影响不大,因此渗风量随开门时间呈线性变化。
[Abstract]:With the rapid growth of the total amount of cold storage, the energy consumption of cold storage has been paid more and more attention. As a large proportion of cold storage heat load is one of the key points in the energy consumption research of cold storage. In this paper, a dynamic simulation model is established by using the unsteady state RANS model to simulate the seepage wind of the reservoir door. The cold storage with the ratio of 2:1 height to the door height is used under the different operating modes of the temperature difference inside and outside the reservoir and the cold air cooler. The experimental results show that the predicted seepage volume, the local wind speed and temperature of the measured points are in good agreement with the experimental values, and the simulation error of seepage air volume is less than 卤10% when the opening time is less than 40 seconds. The model is used to simulate and analyze the characteristics and mechanism of the seepage wind. The results show that the temperature in the fan opening is lower than that in the wind mechanism due to the influence of the wind field in the horizontal direction of the fan. The difference of air density inside and outside the reservoir is small, and the cold air in the reservoir is not affected by gravity, so the air permeation rate changes linearly with the opening time.
【作者单位】：中国科学院理化技术研究所;中国科学院大学;清华大学;
【基金】：国家自然科学基金(51676199) 国家重点研发计划(2016YFE0114300)资助项目~~
【分类号】：TB657.1

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