Water chiller is a widely used equipment in industrial production and commercial places. Its main function is to cool down. Like the central air conditioner in shopping malls that we often see in our lives, its core component is the chiller. Today I will talk about what chillers are roughly divided into and how to choose them.
First of all, in terms of his refrigeration form, chillers can be divided into water-cooled chillers and air-cooled chillers.
The air-cooled chiller uses a shell and tube evaporator to exchange heat between water and refrigerant. The refrigerant system absorbs the heat load from the water and cools the water to produce cold water. The heat is brought to the finned condenser through the action of the compressor. Then it is lost to the outside air by the cooling fan.
The water-cooled chiller uses a shell and tube evaporator to exchange heat between water and refrigerant. The refrigerant system absorbs the heat load of the water and cools the water to produce cold water. The heat is transferred to the shell and tube condenser through the action of the compressor. The refrigerant exchanges heat with the water so that the water absorbs the heat and then takes the heat out of the cooling tower through the water pipe to dissipate it.
In fact, the difference between these two chillers lies in the way of heat dissipation. The household air conditioners we see in our daily lives are typical air-coolers. First, let’s talk about the advantages of air-cooled machines. Air-cooled machines are usually small and do not require cooling towers. They are used in places where the cooling capacity is small. However, one of the major disadvantages of air-cooled machines is that they have more stringent requirements for the environment. Changes have a greater impact on air-cooled units. The advantage of the water chiller is that it has a large cooling capacity, and because it is cooled by water, the environmental change of the cooling tower has little effect on it, and the stability is good. The disadvantage is that the cooling tower needs to be built, and the construction time needs to be longer, and the flexibility is also Almost. Air-cooled chillers are usually used in places where the area is not large and the demand for cooling capacity is small, such as small shopping malls and villas. Water-cooled water chillers are used in places with large areas and large cooling capacity requirements, such as production lines or large-scale production workshops that require a large amount of chilled water.
According to the difference between the chiller compressor, it can be divided into scroll chiller, screw chiller, magnetic levitation cold centrifugal chiller
The scroll chiller and the screw chiller can be put together. The chiller is also composed of multiple components, just like a car. The most important thing for a car is the engine, and the most important thing for the chiller is the compressor. The biggest difference between a screw machine and a scroll machine is the difference in the compressor. The scroll machine uses a scroll compressor, and the screw machine uses a screw compressor. The single capacity of the scroll chiller is small, and the compressor power is from 0.2p-15P, which can be flexibly combined to meet the occasions with different cooling capacity requirements. However, the disadvantage is that when the required refrigeration capacity is large, multiple compressor units need to be connected in parallel. The screw chiller has large cooling capacity and strong cooling capacity. If more than two compressors are connected in parallel, the cooling capacity can reach more than 2000KW, but the disadvantage is that there are certain requirements for the cooling capacity. The minimum power of a single screw chiller is 30P. Generally speaking, scroll chillers are used in places where the cooling capacity is small and require flexibility, such as environmental cooling in small and medium-sized shopping malls. Screw chillers are used in places where the cooling capacity is large and require stable energy efficiency, such as those required by large-scale production lines. frozen water.
Magnetic levitation centrifugal chiller, this is the most cutting-edge product in the chiller industry, and only a few domestic manufacturers can produce this product. The magnetic levitation centrifugal chiller has many advantages that the traditional chiller does not have. Because it uses a magnetic levitation centrifugal compressor, the shaft and the bearing can run without oil during use, which greatly improves the service life of the magnetic levitation centrifugal chiller. At the same time, it also reduces the operating decibels and other advantages. The outstanding advantage is that the energy-saving and high-efficiency magnetic levitation centrifugal chiller can reduce energy consumption by about 40% throughout the year compared with ordinary centrifugal chillers. The COP can reach the national level 1 energy efficiency level of the chiller, and the JPLV can reach 8.3-9. Of course, the magnetic levitation chiller also has shortcomings. Usually it requires the cooling capacity to be more than 1000kw, and the cooling capacity is too small to use the magnetic levitation centrifugal chiller. At this stage, there are brands that can produce magnetic levitation chillers in the world, such as Simote York, Sanhe Chiller. Haier, etc. in China. Because the magnetic levitation centrifugal chiller has the characteristics of high efficiency, energy saving and environmental protection, it is the future development direction of the chiller industry.
Magnetic levitation chiller
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