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The temperature of the quick-frozen cold storage is generally below ℃. Hefei cold storage is mainly used for quick freezing of food, such as quick-frozen dumplings, quick-frozen vegetables, etc., which require rapid freezing of food within a limited time.
Our country is vigorously advocating energy conservation and environmental protection. Energy conservation means reducing energy consumption as much as possible and producing products of the same quantity and quality as before, or using the same quantity of energy consumption to produce products that are better than the original ones. Products of greater quantity or equal quantity and better quality. In recent years, energy-saving equipment and energy-saving products have become a fashion and are warmly welcomed by people. Our requirements for the preservation of fruits and meat are getting higher and higher, and more and more people are installing cold storage, but did you know that the management of cold storage can also be energy-saving?
.Start the machine properly to reduce the power consumption of the compressor. At present, most cold storages still use manual operation to adjust the startup, and the phenomenon of blind startup is common. In order to improve the economy and rationality of compressor operation, the research results show that two principles should be followed. First, correctly estimate changes in the actual cooling capacity of the cold storage. Second, on the premise of ensuring that the refrigeration load is met, the number of startup units should be reduced as much as possible to improve the operating efficiency of the compressor.
.Regularly remove scale on the condenser tube wall to prevent the condensation temperature from rising. According to relevant statistics, thick scale on the water side surface of the condenser will cause the condensation temperature to increase by about .℃, which will increase the power consumption of the refrigeration device.
. Implement large, medium and small maintenance systems. According to the usage conditions and compressor wear patterns, generally the compressor should be overhauled, medium repaired, or minor repaired after operation.
.Strengthening the maintenance and management of cold storage doors mainly includes three aspects: First, effectively maintain the refrigerated doors to ensure trouble-free opening and closing of the refrigerated doors. Second, try to reduce the time and frequency of opening the door. Third, add soft door curtains or high-efficiency air curtains, and it is recommended to add a return room and cover the top with galvanized sheets to facilitate regular defrosting.
.Pay attention to maintaining the fruit preservation effect of the insulation material. When replacing some of the insulation materials that have lost their fruit preservation effect, check the moisture-proof materials at the same time. If the insulation material fails due to aging of the moisture-proof materials, replace the moisture-proof materials at the same time.
. It is most reasonable to determine the start-up time of the cold storage after directly balancing the refrigeration load of the compressor with the needs of the warehouse. That is, the cold storage equipment does not stop, and the number of units is increased or decreased and the gas transmission volume is adjusted according to changes in storage temperature and load.
Today I will introduce to you the small details of energy saving in cold storage management. I just hope that our cold storage managers can start from small things and do a good job in the small details of energy saving, so that the cost of cold storage operation can be saved! Since the reform and opening up, the construction scale of installed cold storage in our country has grown from small to large, from small to large, and has developed rapidly throughout the country. Installed cold storage has developed more rapidly in coastal areas and fruit and fruit preservation production areas. It has occupied a large share in the national economy. However, there are still some serious problems in the design and construction of cold storage, which lead to shortened service life of cold storage and serious waste of energy, which greatly increases the operating cost of cold storage and weakens the competitiveness of enterprises. . Today we will take a look at the reasons for the above phenomena!
.Cold storage design Some design units and individual designers have some misunderstandings about the moisture-proof and air-insulating fruit preservation layer of cold storage. From the beginning of the design, they are confused about the working principle of the cold storage and the impact of the external environment on the operation of the cold storage. Understand that whether the waterproof and air barrier layer is made or not has little impact on the fruit preservation effect of the cold storage. What's more, some people think that whether it is made or not, and what materials are used for it, there is no big difference. Therefore, the design is not in place.
.The bias of the construction unit is the main cause of the problem. For example, a cold storage construction unit uses on-site spraying of polyurethane foam insulation materials, but does not set up an air-proof and moisture-proof layer. Some cold storages even do not even apply cement mortar after masonry, and directly spray a polyurethane foam layer. They mistakenly believe that hard foam will Self-skinning, don’t you know that every spraying destroys the previous layer of skin, and the hot and cold water steam flows in without any barrier, causing serious damage to the fresh-keeping layer of the fruit. The storage temperature is quite unstable, which affects the operation of the cold storage. bring great difficulties.
.Lack of strict control during the construction process. The lax control of some functional departments during the construction process is also a major reason. The relevant national regulatory requirements and operating procedures for the construction of cold storage have not attracted the attention of relevant departments. The State Administration of Technical Supervision issued The "Cold Storage Design Code" has a separate section on air insulation and moisture-proofing of the warehouse. When the design temperature difference on both sides of the building envelope is equal to or greater than ℃, an air barrier should be installed on the side with higher temperature. However, this article is not listed as a mandatory provision, so the implementation is not strict enough. In addition, the waterproofing and air insulation of cold storage in all aspects from design to construction is not fully understood, which has caused serious losses to the operation of our country's refrigeration enterprises.
The above three reasons will shorten the service life of the cold storage, and the energy consumption during the use of the cold storage is also serious, so we must fundamentally improve it to increase the service life of the cold storage!
Cao Chengyang: