4. Insulation materials
Insulation materials for cold storage also contribute to the overall cost. There are two types of insulation materials: polyurethane foam boards, which are durable and provide excellent insulation, and foam boards, which are cheaper but have poor thermal insulation and can easily deform over time, making them suitable only for cold storage above 0 degrees Celsius. Therefore, the quality of the insulation materials directly impacts the construction cost of the cold storage.
Common thermal insulation materials include: soft ceramic insulation, aluminum silicate insulation, phenolic foam material, expanded glass microspheres, adhesive polystyrene particles, extruded board, polystyrene board, rubber-foam insulation materials, loose thermal insulation materials (glass wool insulation, rock wool blanket), and porous thermal insulation materials (foamed cement).
Key Points of Cold Storage Technology
The cold source within the storage comes from ice water, ensuring stable low temperatures, high humidity, excellent preservation quality, and a long shelf life.
② No refrigeration equipment required; just a few fans. Low investment, rapid-freezing and refrigeration warehouse installation with minimal maintenance and management costs. Compared to mechanical refrigeration warehouses that use chlorofluorocarbons or ammonia, this saves over 90% on electricity and causes no pollution.
③Suitable for regions with an average annual temperature below 13°C and winter temperatures below -8°C, with lower temperatures yielding better results.
④ High level of automation, installation quotation for refrigerated cold storage, easy management.
Above is the introduction of the characteristics of the fruit cold storage. As for the cost of a fruit preservation cold storage, if it is built in Shanghai, a 30 cubic meter storage (about 10 square meters) for fruit preservation would cost approximately 25,000-40,000 yuan, and a 100 square meter fruit preservation warehouse would be around 100,000-160,000 yuan. The quoted prices are for reference only, as prices cannot be provided without considering the specific size and configuration requirements of each cold storage.
2. Refrigeration systems and unit selection for cold storage
For the design and selection of refrigeration systems in the installation and construction of small cold storage facilities, the main focus is on the selection of the cold storage compressor and evaporator.
For small refrigerated warehouses, the choice of a fully enclosed compressor is recommended.
Typically, semi-hermetic compressors are chosen for medium-sized cold storage facilities, while large cold storage units also opt for semi-hermetic compressors. For small cold storage, due to their smaller size and other factors, fully enclosed compressors are more suitable.
For example, let's consider this small hotel refrigeration warehouse, which is relatively inexpensive due to the low-power fully enclosed compressor. It is very price-appropriate for investments in small refrigeration warehouses. When selecting evaporators for the design of a small refrigeration warehouse, medium and low-temperature warehouses primarily use seamless steel tubes for evaporator manifolds. The cost of installation for cold storage warehouses is variable, but they offer excellent temperature control and can store cold at the right time. High-temperature warehouses, on the other hand, choose refrigerant fans as evaporators, which have the advantage of quick cooling but can lead to moisture loss in stored goods.
