Temperature Field Distribution and Optimization of Monitoring Sensor Layout in Small Assembly Cold Storage

HUANG Yiming; LI Baoguo; WANG Xin

doi:10.19554/j.cnki.1001-3563.2025.17.022

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (17) : 202-221. DOI: 10.19554/j.cnki.1001-3563.2025.17.022

Agro-products Preservation and Food Packaging

Temperature Field Distribution and Optimization of Monitoring Sensor Layout in Small Assembly Cold Storage

HUANG Yiming, LI Baoguo, WANG Xin^*

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Abstract

The work aims to propose an optimized sensor layout method based on experimental verification and numerical simulation to deal with the limitations of traditional uniform temperature monitoring sensors layout methods used in small assembly cold storage. The temperature and velocity fields under different stacking methods of goods, wind speed and door opening operation were performed using numerical simulation, then variations in hot spots and temperature-exceeding volumes were evaluated. Subsequently, the temperature monitoring sensor layout was optimized using the K-Means algorithm. The study revealed that under different working conditions, the temperature fluctuation area of the cold storage was mainly located in the region where the cold air was discharged by the fan or the region near the door. While the high-temperature region was prone to appear on the upper region, and its geometric center could reflect the average temperature of the cold storage. The stacking methods of goods significantly affected the temperature-velocity coupling field inside the cold storage. An increase in wind speed could improve temperature uniformity inside the cold storage. After keeping the door open for 120 s, a significant temperature increase was observed, with the areas of elevated temperature covering almost the entire cold storage. Based on K-Means optimization, a layout scheme consisting of 10 temperature monitoring nodes was designed, and redundant temperature monitoring nodes were effectively reduced. Compared with the traditional layout scheme, the monitoring range of the optimized scheme could effectively cover the temperature variations in each area of the cold storage and respond quickly to changes under different operating conditions. This study provides a scientific and practical solution for the design of temperature monitoring sensor layouts in small assembly cold storage. Its monitoring performance meets the requirements of precision and real-time management in cold-chain food safety.

Key words

small assembly cold storage / temperature-velocity coupling field / temperature monitoring / layout optimization / numerical simulation

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HUANG Yiming, LI Baoguo, WANG Xin. Temperature Field Distribution and Optimization of Monitoring Sensor Layout in Small Assembly Cold Storage[J]. Packaging Engineering. 2025, 46(17): 202-221 https://doi.org/10.19554/j.cnki.1001-3563.2025.17.022

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