The formation of a complete cold storage design drawing is not easy. It needs to be fully considered and measured before it can be formulated. During the design process, the user’s needs and installation location must be taken into account to ensure a better Meet the needs of users in the future. Reduce failures and improve efficiency. The main points of consideration in the cold storage design diagram include the following: 1. The volume of the cold storage The size of the cold storage should be designed according to the highest amount of agricultural products to be stored throughout the year. This capacity is calculated based on the volume required for the storage of products to be stacked in the cold storage, plus the aisles between rows, the space between the stack and the wall and ceiling, and the space between the packaging. After determining the cold storage capacity, determine the length and height of the cold storage. 2. Selection and preparation of cold storage location The necessary auxiliary buildings and facilities, such as workshops, packing and finishing rooms, tool storage, and loading docks, should also be considered when designing cold storage. According to the nature of use, cold storage can be divided into three types: distribution cold storage, retail cold storage, and production cold storage. The production cold storage is built in the production area where the supply of goods is relatively concentrated, and factors such as convenient transportation and market connection must also be considered. There should be good drainage conditions around the cold storage, and the groundwater level should be low. It is better to have a compartment under the cold storage, and maintain good ventilation. Keeping dry is very important for the cold storage. 3. Selection of insulation materials for cold storage The selection of insulation materials for cold storage must be adapted to local conditions, which must have good thermal insulation properties and be economical and practical. The structure of modern cold storage is developing towards prefabricated cold storage. Cold storage components including moisture-proof layer and heat-insulating layer are made and assembled on site. The advantages are convenient, fast and movable construction, but the cost is relatively high. 4. The choice of cold storage cooling system The choice of cold storage cooling system is mainly the selection of cold storage compressor and evaporator. Under normal circumstances, the small-scale cold storage is mainly based on hermetic compressors. Medium-sized cold storage generally use semi-hermetic compressors; large-scale cold storage uses semi-hermetic compressors, but cold storage design drawings and cold storage installation and management are more cumbersome. 5. Selection of refrigeration compressor In the refrigeration device of the cold storage, the capacity and quantity of the refrigeration compressor cold storage equipment are configured according to the maximum heat load of the production scale and taking into account the various refrigeration parameters. In actual production, it is impossible to completely match the design conditions. Therefore, selection and adjustment must be made according to the actual production situation to determine the capacity and number of compressors that are reasonably put into operation, in order to use the lowest consumption and the most suitable conditions to complete the required refrigeration tasks of the cold storage. When selecting and adjusting the compressor in the design and installation of the cold storage, the following points should be followed: 1. Select the compressor according to the heat load of the
cold room and the refrigeration capacity of the evaporator, so that the cooling capacity and heat load of the compressor in operation Compatible with the refrigeration capacity of cold storage refrigeration equipment. 2. When the required evaporation temperature is higher and the actual condensation temperature is higher, bipolar compression refrigeration is required. Generally, the compression ratio is equal to 8 as the boundary. When the compression ratio is less than 8, single-stage compression is adopted; when the compression ratio is greater than or equal to 8, bipolar compression is adopted. 3. Make each machine only bear the heat load of one evaporating temperature as much as possible during operation, so that a better cooling effect can be obtained. 4. The volume ratio of the high and low pressure compressors can be adjusted reasonably according to the intermediate temperature, condensing temperature, evaporating temperature and other conditions of the bipolar compressor or bipolar compressor unit.
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