Can Container Houses Be Used as Cold Storage?

Container houses can be transformed into cold storage facilities, and their technical feasibility has been verified through engineering practice, offering significant advantages in specific scenarios. The following elaborates on the technical implementation, application scenarios, and key selection considerations:

I. Technical Implementation Methods

The core of converting container houses into cold storage lies in enhancing thermal insulation performance and integrating refrigeration systems.

1. Application of Thermal Insulation Materials:
   Utilizing polyurethane foam integrated molding technology, double-sided color-coated steel polyurethane sandwich cold storage panels are used as wall and ceiling materials. These panels typically have a thickness of 50-100mm and a thermal conductivity as low as 0.022W/(m·K), effectively blocking external heat transfer. For example, the composite panels produced by Lanzhou Liqun using this technology have been widely applied in pharmaceutical and low-temperature cold storage projects in Gansu and Qinghai provinces.
2. Configuration of Refrigeration Systems:
   Integrating Copeland semi-hermetic compressor units, ceiling-mounted air coolers, and intelligent control systems. Taking the mobile container cold storage produced by Lenglian Refrigeration as an example, its refrigeration equipment can achieve a wide temperature range adjustment from -18℃ to +5℃ and is equipped with functions such as power phase loss protection and current overload protection to ensure stable operation under 380V/220V power supplies.
3. Optimization of Sealing Performance:
   Treating container body seams with welding processes and filling door frame gaps with B2-grade fire-resistant polyurethane sealant to meet the airtightness requirements of the national standard GB/T 8484-2008, reducing cold loss.

II. Typical Application Scenarios

1. Temporary Cold Chain Needs:
   In scenarios such as construction sites and mobile markets, mobile container cold storage can be rapidly deployed and relocated with the project. For example, the second-hand maritime refrigerated containers modified by Qingdao Xinshunyuan have been used for seafood processing and fruit and vegetable preservation after 72 hours of continuous temperature control testing, with a temperature control accuracy of ±0.5℃, meeting GSP pharmaceutical storage standards.
2. Fixed Small-Scale Cold Storage:
   Non-standard-sized container houses (e.g., 3m×6m specifications) can be customized to serve as mini cold storage facilities for supermarkets, convenience stores, and community fresh produce stores. A company in Yinchuan, Ningxia, adopted a combination design of polyurethane insulated doors and cold storage panels to control the temperature fluctuation range within the storage to ±1℃.
3. Adaptation to Special Environments:
   In plateau regions (e.g., Xining, Qinghai), container cold storage can withstand strong ultraviolet radiation and sandstorms by enhancing container body structural strength and anti-corrosion treatment, ensuring equipment service life exceeds 15 years.

III. Key Selection Considerations

1. Matching Temperature Control Ranges:
   Select equipment temperature zones based on the type of stored goods. For example, pharmaceutical cold storage requires a constant temperature of 2-8℃, while quick-freezing storage requires deep-freezing capabilities below -30℃.
2. Optimization of Energy Efficiency Ratio:
   Prioritize equipment equipped with variable frequency compressors, which offer a 20%-30% improvement in energy efficiency ratio (COP) compared to fixed-frequency models, reducing long-term operating costs.
3. Verification of Modular Design:
   Confirm whether the supplier provides standardized interfaces and quick disassembly and assembly structures. For example, Zeyu Container Houses support multi-container splicing and expansion through modular design, shortening the modification cycle of a single container to 7 working days.
4. Compliance Review:
   Check whether the equipment has passed CCRC certification (China Certification for Refrigeration and Air Conditioning Equipment) and confirm that the combustion performance of thermal insulation materials meets the B1-grade requirements of GB 8624-2012.