How can the AC units and cold storage projects prevent cold bridges?

In various industries, air conditioning is an indispensable and important facility. In the frozen and fresh food industry, cold storage is used to store various products that require low-temperature preservation. If the cold bridge phenomenon is not prevented, it can lead to a loss of cooling capacity, an increase in energy consumption, and even affect the insulation effect and quality of stored items in the cold storage. Therefore, when constructing cold storage and air conditioning units, the anti cold bridge is a work that needs to be taken seriously. Firstly, we need to understand what a cold bridge is: a cold bridge, in simple terms, refers to the phenomenon where the heat transfer coefficient in certain parts of a building is significantly higher than in other parts, resulting in concentrated heat transfer in that area and the formation of localized low-temperature zones. The main reasons for the formation of cold bridges are as follows: 1 Unreasonable structural design: Improper design of component connections, corners, and other areas can lead to easy heat transfer. 2. Differences in thermal conductivity of different materials: Different materials have different thermal conductivity, which can easily form cold bridges at the junction. 3. Construction quality issues: Construction is not standardized, such as inadequate splicing of insulation layers, improper handling of fasteners, etc. 4. Thermal Bridge Effect: Cold bridges are easily formed in areas of buildings with dense heat flow and lower internal surface temperatures. 5. Environmental factors: Changes in external temperature, humidity, etc. may also cause the formation of cold bridges. Cold bridges usually occur at the junction of walls, roofs, floors, and insulation materials, or at locations where component materials have high thermal conductivity.

The main locations of cold bridges are usually as follows: 1 The junction between the wall panel and the ground: This is one of the areas where cold bridges are prone to occur. 2. Intersection between wall panel and roof panel: A cold bridge may also form here. 3. Splicing of different insulation materials: Cold bridges are prone to occur at the joints of different insulation materials. 4. Edge areas such as air inlet and outlet, door openings, etc.: These areas have significant structural changes and are prone to forming cold bridges. 5. Protruding structures such as columns and beams: These building components are prone to cold bridges at the connection with walls. The impact of cold bridge phenomenon on cold storage and air conditioning units is multifaceted, and the hazards of cold bridge mainly include the following aspects: 1 Increased energy consumption: Cold bridges can cause heat transfer, requiring the cold storage refrigeration system to consume more energy to maintain low temperatures and increase operating costs. 2. Affects temperature stability: destroys the uniformity of temperature inside the cold storage, causing significant temperature fluctuations in some areas, which is not conducive to the storage of items. 3. Condensation and icing: The cold bridge area is prone to condensation and even icing, which may damage the goods and affect the normal use of the cold storage. 4. Shorten the service life of cold storage: Long term exposure to cold bridges can accelerate the damage of cold storage structures and insulation materials, shortening the overall service life of cold storage. 5. Reduce refrigeration efficiency: This reduces the refrigeration effect of the cold storage and cannot effectively maintain a low-temperature environment. Therefore, a series of measures must be taken during construction to prevent the occurrence of cold bridging phenomenon.

Suzhou Pharma Machinery Co.,Ltd.

2025/04/18

Gino