Introduction of cold storage construction design considerations
Release time:
2019-07-24
1. The size of the cold storage volume of the cold storage should be calculated according to the volume that the storage products must occupy in the cold storage, plus the inter-row aisle, the space between the pile and the wall and the ceiling, and the gap between the packaging room. After determining the capacity, determine the length and height of the cold storage. Cold storage design should also consider the necessary ancillary buildings and facilities, such as workshop, packaging and finishing room, tool warehouse and loading and unloading station, so that the quality of cold storage can be guaranteed. 2, the choice of heat insulation material is very important to the quality of cold storage, cold storage insulation material selection must be adapted to local conditions, not only to have good heat insulation performance, but also economical and practical. Insulation material is divided into several
1. Volume of cold storage
The size of the cold storage should be calculated according to the volume occupied by the storage products piled up in the cold storage, plus the inter-row aisle, the space between the pile and the wall, the ceiling, and the gap between the packaging room. After determining the capacity, determine the length and height of the cold storage. Cold storage design should also consider the necessary ancillary buildings and facilities, such as workshop, packaging and finishing room, tool warehouse and loading and unloading station, so that the quality of cold storage can be guaranteed.
The choice of insulation material is very important to the quality of cold storage.
The selection of cold storage insulation materials must be adapted to local conditions, not only to have good heat insulation performance, but also economical and practical. Thermal insulation materials are divided into several types. One is a plate processed into a fixed shape and specification, with a fixed length, width and thickness. The plate with the corresponding specification can be selected according to the installation requirements of the cold storage body. The high and medium temperature cold storage generally uses a 10cm thick plate, and the low temperature cold storage and frozen cold storage generally uses a 12cm or 15cm thick plate. The other can be sprayed with polyurethane foam, the material is sprayed directly into a brick or concrete warehouse that has been built, and the shape is both moisture-proof and heat-insulating. Thermal insulation material plate has polyurethane, polystyrene and so on. Polyurethane does not absorb water and has good heat insulation, but the cost is high; polystyrene has strong water absorption and poor heat insulation, but the cost is low. The structure of the modern cold storage forward assembly type development, made including moisture-proof layer and heat insulation layer of the library body components, to do on-site assembly, its advantages are convenient construction, fast, and movable, but the cost is relatively high.
The choice of refrigeration system is the most important to the quality of cold storage.
The choice of cold storage refrigeration system is mainly the choice of compressor and evaporator, refrigeration system is the core of cold storage, mainly by the compression system, condensation system, evaporation system and regulating valve four parts, in addition to the fan, duct and instrument and other accessories. The entire refrigeration system is a sealed loop in which the refrigerant circulates, controlling the supply and the number of times it enters the evaporator as needed to obtain suitable low temperature conditions. The compressor is the heart of the refrigeration system, which pushes the refrigerant to circulate in the system. The function of the condenser is to remove the heat in the compressed gaseous refrigerant and condense it into a liquid refrigerant; the cooling methods of the condenser include air cooling, water cooling, and the combination of air and water. Air cooling is only limited to small cold storage. Application in refrigeration equipment. The function of the evaporator is to provide cold energy to the cold storage. The evaporator is installed in the cold storage. The blower is used to blow the cooled air to various parts of the storage. The large cold storage is usually connected with the evaporator through the air duct to extend the air supply distance. The temperature drop is more uniform.
4. Under normal circumstances, small cold storage selection of fully enclosed compressor
Because the power of the fully enclosed compressor is small, the price is relatively cheap; medium-sized cold storage generally uses semi-enclosed compressor; large cold storage uses semi-enclosed compressor, in the selection, can also consider the selection of ammonia refrigeration compressor, because the ammonia refrigeration compressor power is large, and can be a machine, but the installation and management is more cumbersome. In the selection of cold storage evaporator, high temperature cold storage to select the air cooler for the evaporator, which is characterized by fast cooling speed, but easy to cause the water loss of the refrigerated goods; medium and low temperature cold storage selection of seamless steel tube production of the evaporation tube, which is characterized by a good constant temperature effect, and can be timely cold storage.
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