Cold storage common sense and usable method

Summon:

Cold storage common sense and usable method

     With the rapid development of China's economy, refrigeration equipment has entered the supermarkets, commercial, agricultural and industrial fields, closely connected with our life. Due to the rapid development of refrigeration, users face numerous manufacturers on the market and different varieties, often do not know how to choose, especially high demand, more investment, adds to the difficulty of the choice. Here we introduce some of the common sense of cold storage and purchase methods, and perhaps you can help to buy cold storage.

Uses and classification of cold storage

     Cold storage is a method of artificially cooling the temperature within the specified space to the fixed space, in order to facilitate the storage of buildings. Cold storage can be widely applied to food plants, dairy factory, pharmaceutical factory, chemical plants, warehouses of fruits and vegetables, eggs warehouse, hotels,supermarkets, hospitals, blood banks, troops, laboratories. Cold storage is mainly used for the food, dairy products, meat, aquatic products, poultry, fruits and vegetables, cold drinks, flowers, plants, tea, medicine, chemical raw material, electronic instrumentation, and other constant temperature storage. Cold storage can be divided into different types according to various characteristics.

     1.by the size of the storage capacity of the classification. At present, the capacity of the cold storage is not unified, generally divided into large, medium and small. Large cold storage refrigeration capacity in more than 1 million tons; medium-sized refrigeratory refrigeration capacity in 1000 ~ 1 million tons; small cold storage refrigeration capacity of 1000 tons in the following.

     2.according to the design of refrigeration temperature classification. Can be divided into high temperature, medium temperature, low temperature and ultra low temperature four kinds of cold storage. General high temperature cold storage refrigeration design temperature at - 2°C ~+8°C; medium temperature cold storage refrigeration design temperature at - 10°C ~-23°C; low temperature cold storage generally in -23°C ~-30°C; ultra low temperature freezing storage temperature generally to -30°C ~-80°C.

     3.Classification by the cold storage structure.

      The first is the civil cold storage. This is the building more a kind of cold storage, can be built into a single layer or multi-layer. The body of the building for reinforced concrete frame structure or the brick structure. Construction of retaining structure is a heavy body structure of cold storage, thermal inertia is larger, outdoor air temperature fluctuation and the external surface of the retaining structure of day and night day and night temperature fluctuations caused by solar radiation, attenuation is larger in the palisade structure, inner surface temperature fluctuation is small, so the palisade structure library temperature is easy to stability.

    The second is combination plate cold storage. The cold storage for the single form, library board as the steel framework of lightweight precast insulating board assembly structure, its bearing components with thin wall type steel. Library board inside and outside of the board are made of color steel plate, library board core material for foamed rigid polyurethane or taped polystyrene foam board. Because in addition to the ground, all components are in accordance with the unified standard in the professional factory of complete sets of prefabricated, assembled at the site, so construction progress fast, short construction period.

     Cold storage is soil again. It is also called TuYaoDong refrigerator, body piercing is arched structure more, have single body piercing type, there is also a continuous arch form. Generally for brick masonry, and with a certain thickness of loess layer as a heat insulation layer. Turns the soil used as low temperature cold storage, should be the basis of body piercing is not easy to frost heaving sand layer or rock. Because it has the adjust measures to local conditions, local materials, simple construction, low cost, durable wait for an advantage, in the development of the northwest region of China is larger. There is a cave cold storage. Generally built in stone is relatively hard, integrity, good strata do body piercing the inside lining or spray anchor handling, body piercing of rock cover thickness is generally not less than 20 meters.

Features and requirements

    In order to maintain low temperature cold storage, cold storage walls, floor and ceiling are equipped with a certain thickness of insulation material, in order to reduce the incoming calories. In order to reduce the absorb the radiant energy of the sun, cold storage wall surface usually painted white or light color. So cold storage architecture is different from general industrial and civil architecture, with its unique structure.

     Cold storage buildings to prevent the diffusion of water vapour and air permeability. Outdoor air intrusion not only increase the amount of consumption of cold cold storage, but also to the cold storage to the water, moisture condensation cause freeze damage to the building structure, especially heat insulation structure be affected with damp be affected with damp, so to set up the dampproof insulating layer, the cold storage architecture has good sealing and moistureproof gas insulation performance. The foundation under the influence of low temperature cold storage, moisture in the soil is frozen. Because of the volume expansion after the frozen soil, will cause the ground rupture and the whole building structure deformation, severe cold storage cannot be used. Therefore, low temperature cold storage floor except to have effective insulation, thermal insulation layer under the must also for processing, in order to prevent the frozen soil. Cold storage of the base plate to pile up a lot of goods, and to pass all kinds of loading and unloading transportation machinery and equipment, so its structure should be strong and have larger bearing capacity. Low temperature environment, especially in the cyclical process of freezing and thawing cycle, building structures are susceptible to damage. Therefore, all the parts of the cold storage of building materials and cold storage structure to have sufficient antifreeze performance.

     In general, the cold storage building is to the strict insulation, sealing, sturdiness and durability to guarantee the building quality. Choose appropriate cold storage according to their store goods tonnage, every day the inbound shipments and buildings to determine the size of the cold storage size, determine the vault door size and door opening direction. The installation environment of cold storage should be clean, dry and ventilated.. According to the storage items, select the temperature of the reservoir. The choice of fresh storage (+5°C~-5°C), frozen storage (0°C~-18°C), or low-temperature storage (-18°C~-30°C). According to the characteristics of the buildings and the local water source, choose the refrigeration mode of the refrigeration, generally have air cooling and water cooling. Refrigerator is air-cooled, users just need to choose placement can; refrigeration machine is water-cooled users need to configure pool size, and deep wells, circulating water pipeline, export pipeline and water pump, cooling tower placement. Complete auxiliary facilities construction.

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