对流状态对食品配送箱内温度分布的影响

IF 1.8 Q3 MECHANICS
Fluids Pub Date : 2024-05-14 DOI:10.3390/fluids9050114
F. Beaumont, S. Murer, F. Bogard, G. Polidori
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引用次数: 0

摘要

本研究旨在通过集成通风系统优化冷藏配送箱的热力学性能。为实现这一目标,我们开发了一个由发泡聚苯乙烯制成的原型,其中包含一个主动通风系统,以确保冷藏温度的均匀性。装置中集成了热电偶,用于监测通风和不通风时的温度变化。同时,还使用计算流体动力学(CFD)进行了二维热空气动力学研究。冷源热力学行为的数值建模采用多项式定律作为计算代码(UDF 函数)的输入数据。实验结果与数值结果的对比显示,计算代码能够准确预测冷库配电箱中的时间温度演变,尤其是在强制对流条件下。研究结果表明,在不通风的情况下,热交换主要通过空气传导进行,而在通风的情况下,热交换则通过对流进行。总体而言,通风设备引起的强制对流可增强冷藏分配箱的热传递和热力学性能。此外,空气混合限制了热分层,从而促进了温度均匀化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of Convection Regime on Temperature Distribution in Food Distribution Storage Box
This study aims to optimize the thermodynamic performance of a cold storage distribution box through the integration of a ventilation system. To achieve this goal, a prototype constructed from expanded polystyrene is developed, incorporating an active ventilation system to ensure cold temperature uniformity. Thermocouples are integrated into the device to monitor the temporal temperature evolution with and without ventilation. Concurrently, a 2D thermo-aerodynamic investigation is conducted using computational fluid dynamics (CFD). The numerical modeling of the thermodynamic behavior of the cold source employs polynomial laws as input data for the computational code (UDF functions). A comparison between experimental and numerical results reveals the computational code’s accurate prediction of the temporal temperature evolution in the cold storage distribution box, particularly under forced convection conditions. The findings indicate that in the absence of ventilation, thermal exchanges primarily occur through air conduction, whereas with ventilation, exchanges are facilitated by convection. Overall, forced convection induced by the inclusion of a ventilation device enhances thermal transfers and the thermodynamic performance of the cold storage distribution box. Furthermore, air mixing limits thermal stratification, thereby facilitating temperature homogenization.
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来源期刊
Fluids
Fluids Engineering-Mechanical Engineering
CiteScore
3.40
自引率
10.50%
发文量
326
审稿时长
12 weeks
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