- Compressors: The size of a cold storage determines the type of compressor used. Small cold storages, typically under 100 cubic meters, use hermetic compressors while medium cold storages, typically under 3000-5000 cubic meters, use semi-hermetic compressors. Large cold storages use screw compressors.
- Evaporators: The cooler inside the cold storage, also known as the evaporator, cools the space quickly and efficiently. For large-scale cold storage projects, water and air-cooled evaporative condensers are preferred as they have higher cooling and heat transfer efficiency. Small and medium-sized cold storages typically use air-cooled condensers as they are easier to install, use and maintain.
- Insulation Materials: The insulation material used in a cold storage varies based on the desired temperature. Different PUF insulation panels are used such as 100mm PUF insulation panels for areas above -5 °C. For low temperature and frozen storage below -10 to -30 °C, 150mm PUF insulation panels are generally used. For extremely low temperatures of -30 to -40 °C, 200mm PUF insulation panels are recommended. For temperatures below -40 to -80 °C, 250mm or 300mm PUF insulation panels are typically used.
- Low-temperature cold storage: Temperature range is between -25°C to -18°C, suitable for storing frozen food items like fish, meat, ice cream, and cold drinks.
- Medium-temperature cold storage: Temperature range is between -5°C to 0°C, suitable for storing milk, dairy products, fresh meat, fruits, vegetables, and flowers.
- Operating room or platform area: Temperature range is between 10°C to 15°C.
- Quick-freezing storage: The temperature range is generally -35°C to -40°C, suitable for rapid cooling of food items.
- Fresh-keeping warehouse: Temperature range is between 0°C to 5°C, suitable for storing fresh meat, dairy products, fruits, and vegetables.
- Low temperature refrigeration: Temperature range is between -20°C to 10°C, mainly used for food refrigeration.
- Quick-freezing warehouse: Temperature range is below -30°C, mainly used for quick freezing of food.
Cold storage construction involves both the building of the warehouse itself and the configuration of logistics equipment and systems, each with their own standards and specifications. When planning and constructing a cold storage facility, it is important to consider its function and usage. Will it be used for storage or processing? Cold facilities for storage are mainly used for long-term turnover and can be self-used or rented out. Self-use facilities should be designed according to the specific processing and production needs of the business, and should consider the flow of goods from purchase, cleaning, sorting, quick-freezing, refrigeration, to warehouse delivery. Finally, as a type of warehouse, cold storage must comply with building fire codes to ensure safety.
Choosing the right cold storage panels is crucial for maintaining optimal temperature and humidity levels in a cold storage facility. The following are the main types of cold storage panels:
- Polystyrene foam sandwich panels: these panels have a colored steel plate surface and a closed-cell, flame-retardant polystyrene foam core. They are highly efficient and structurally strong.
- Polyurethane panels: these panels have a lightweight polyurethane core and an outer material that can vary.
- PVC color steel plates: these panels are composed of stainless steel plates and can reduce heat transfer.
When selecting cold storage panels, it is important to consider the material and insulation. Polyethylene and polystyrene are commonly used materials for cold storage panels. Polyurethane is also an effective option with good insulation properties and no moisture absorption, though it is slightly more expensive.
Designing and installing a cold storage facility requires some preparation. Here's a brief overview of the process:
- For new buildings and cold storage projects under 10,000 tons, the construction process includes foundation construction, steel structure assembly, insulation panel installation, refrigeration equipment installation, floor insulation, concrete construction, commissioning, and finally, cooling use.
- For cold storage projects in existing buildings, the process involves on-site ground leveling, insulation panel installation, refrigeration equipment installation, piping circuits, ground insulation, concrete construction, testing, and finally, qualified use.
- For large-scale automatic three-dimensional cold storage, the construction process includes infrastructure construction, shelf installation, automation equipment installation, outer insulation panel installation, refrigeration equipment installation, control installation, testing, and finally, qualified use.
For general small-scale cold storage equipment materials, the materials and equipment we offer are designed to be very convenient for on-site installation. Local electrical and refrigeration engineers can easily install and test the equipment based on our instruction list. For a cold storage project, there may be some parts that need to be purchased locally, depending on the actual situation during the installation.