Temperature Changes in Land Container Transport
During land transport, the temperature inside a container is affected by the external temperature. Therefore, to understand the temperature changes inside the container, it is necessary to investigate the maximum and minimum external temperatures in various locations, and further analyze the relationship between the external temperature and the container's internal temperature. Let us first examine the temperature difference between the external temperature and the temperature inside the container.
Temperature Difference Between External and Internal Temperatures
1. When the Container is Exposed to Direct Sunlight During land transport, there is a significant difference in internal temperature between containers exposed to direct sunlight and those covered or shaded.
2. When the Container is Not Exposed to Direct Sunlight (Roof Covered) According to test research conducted with containers placed in a Chicago rail yard, even if the container is slightly exposed to sunlight, the internal temperature does not rise much higher than the external temperature. When the external temperature drops, the internal temperature also does not drop significantly.
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Land Transport Temperature Control Methods
Insulation Measures: Use thermal insulation packaging materials for temperature-sensitive goods.
Temperature-Controlled Vehicles: It is recommended to use refrigerated trucks for transporting high-value temperature-controlled cargo.
Time Selection: Avoid loading at noon in summer; pay attention to keeping goods warm in winter.
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Summary of Land Transport Temperature Management
Properly controlling the temperature of land transport containers is crucial for protecting goods. Selecting appropriate protective measures based on the characteristics of the cargo and the transport season can effectively reduce the risk of cargo damage.
Land Transport Temperature Management in Different Seasons
Summer: The internal temperature can reach 40-50 degrees Celsius. It is recommended to load goods at night or early morning. Use a sunshade cloth to cover the container to reduce direct sunlight. Choose refrigerated trucks for high-value cargo.
Winter: In northern regions, the internal temperature can drop below zero. Goods prone to freezing need to use insulated packaging or heated vehicles. Pay attention to leaving an air gap between the cargo and the container walls to enhance insulation.
Spring and Autumn: Temperature differences are large, with day-night variations reaching 15-20 degrees Celsius. Pay attention to preventing nighttime condensation.
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