A Coolant for Wind Power
Wind is one of the pollution-free energy sources, and it is inexhaustible. With the development of the global economy, the wind energy market has also developed rapidly.With the development of technology and environmental protection, wind power generation can compete with coal-fired power generation in business.China is rich in wind energy resources, and the exploitable wind energy reserves are about 1billion kW. At present, wind power projects are all over the country.
With the investment of a large number of wind power generation equipment, some problems have been found during long-term operation.The power generation efficiency is reduced and the liquid cooling system is corroded.This is mainly because the cooling system is essential in wind power generation, and even affects the power generation efficiency.The main cooling systems include:1. In the unit including the gearbox, the gearbox has a set of gear oil cooling system;2. The generator has its own cooling system, such as cooling fan, natural air cooling, etc; 3. In the unit containing the converter system, there is also the cooling system of the corresponding converter system, which adopts different cooling methods, such as air cooling and water cooling;4. For the cooling system of the whole machine, in order to solve the problem of excessive temperature in the fan room, the fan has a set of cooling system as a whole, such as the overall air cooling system with chimney effect;5. Cooling system for other equipment.
The coolant of the existing cooling system mainly adopts ethylene glycol products, but there is no coolant specially developed for wind power generation equipment.Only some automobile antifreeze sold on the market can be used.However, there are still many differences between the materials and working conditions of automobile application and wind power generation, and the antifreeze has a service life.After finding this problem, the Glacial Coolant began to carry out relevant development experiments.Firstly, the cooling system of wind power generation equipment is made of copper, iron, aluminum and other materials. There is a potential difference between the materials, which is prone to electrochemical corrosion when the conductivity is high. When the conductivity is very low, it corrodes some metals faster. On this basis, a low conductivity coolant is developed to achieve corrosion inhibition of different metals with excellent physical parameters.However, the coolant should be included in the maintenance scope of wind power during the use process. The electricity should be tested and adjusted and maintained in time. Lifelong after-sales maintenance of Glacier Coolant.
Application of Coolant in Ice Ball Cold Storage System
Ice ball type cold storage air conditioning system uses a cold storage tank containing ice balls to store cold.The shell of the ice ball is made of high-density polyolefin material and is filled with a cold storage solution with high solidification melting latent heat.And use the coolant to flow through the gap between the balls in the cold storage sample to exchange the cooling capacity with the ice ball. When using brine unfrozen liquid or evaporation coil to make ice, the brine or refrigerant is in the pipe and the cold storage is outside the pipe, while the coolant of the ice ball type cold storage system flows outside the pipe and the cold storage body is in the ball. The maximum heat transfer area can be released to achieve efficient wet cooling and cold storage. It is widely used in ice storage system.
The traditional coolant is ethylene glycol, which has low viscosity and high specific heat under service conditions, so it is also widely used. However, in the system used for many years, the coolant has been seriously corroded. During the use process, it is found that the efficiency of the cold storage system has decreased, and the surface of the ice ball is attached with rust and dirt.
By establishing the flow model of ice storage tank, some researchers conducted experiments on the flow direction, inlet flow rate and physical property parameters of the coolant, and found that the higher the inlet flow rate, the coolant flows in from the bottom and out from the top, the lower the viscosity of the coolant, and the larger the Nu number tested.In some practical projects, relevant processes have been adopted, but ethylene glycol has been used as coolant, and there is no more suitable product.Glacial Coolant LM-4 uses modified ethylene glycol, which has low viscosity, higher specific heat and similar density. It can directly replace the traditional ethylene glycol system without corrosion.For the ice ball storage system, the glacier coolant LM-4 is suitable. At present, the company has several applications, and the application effect is good.
Glacier Coolant focuses on the research and development of coolant and the application experiment of coolant system, and customizes exclusive coolant for different systems.
Application of Coolant in Constant Temperature Air Conditioning System
With the progress of science and technology, more and more venues need high-precision constant temperature and humidity air conditioning.At present, some universities and enterprises have precision laboratories, data center machine rooms, power distribution of the State Grid, precision instrument processing workshops, and plant culture environments in agriculture. The characteristics of precision air conditioning are constant temperature and humidity, timely feedback and self-tuning to cope with load fluctuations.
Precision air conditioners generally use indirect refrigeration, which controls thermal fluctuation with small temperature difference. In particular, PID regulation can be realized in control. Combined with frequency conversion control, indoor air outlet temperature and humidity will be stable to meet high process requirements.With the economic development of the north, its demand for compact air conditioning is also gradually increasing. However, in the mode used in the south, there is a risk of pipeline freeze damage in the north. Some air-conditioning manufacturers have adopted the antifreeze solution on the market to solve the antifreeze problem.However, with the long-term use, it is found that the stability of the system has decreased. The main reason is that the physical properties of the antifreeze are unstable.It is necessary to calculate the selection of equipment in the design stage of precision air conditioning, and the physical parameters of coolant are essential.The main function of antifreeze in the market is antifreeze. There are few physical property tests, and it is corrosive after a long time. Rust mud will accumulate at some heat exchangers or regulating valves, affecting regulation and heat exchange, resulting in instability of the air conditioning system.
Glacial Coolant is specialized in making coolant,It has been used in many and stable fields, such as medicine and chemical industry. It is a product developed in the industrial field.Upgrade high-end testing software such as physical property testing laboratory, mass spectrometer and chromatograph, and provide high-quality after-sales service.When the precision air-conditioning system studies the control to improve the accuracy, it needs to pay attention to some external conditions of the coolant, so as to achieve more stable high-precision control.
Analysis on The Development Direction of Cold Storage Refrigeration System in Carbon Emission
With the goal of carbon peaking and carbon neutralization, carbon emissions are gradually affecting various industries, especially large energy consumers.As an important material supporting facility, the energy consumption of cold storage has always been an important factor in its development. However, under the goal of double carbon, carbon emissions will affect its later development direction.
Carbon emission is a comprehensive concept, which involves the construction of cold storage, material consumption, energy consumption, material recycling and other carbon footprints.Among them, energy consumption and refrigerant supplement account for a large proportion. The development direction of cold storage is mainly around energy consumption and refrigerant.At present, domestic cold storage systems mainly include ammonia refrigeration system, freon refrigeration system and carbon dioxide refrigeration system.Each system is the product of the development of policy and technology, and its advantages and disadvantages are obvious.
The energy consumption of ammonia refrigeration system is the lowest, the GWP of ammonia refrigerant is 0, and its comprehensive carbon emission is the lowest.From the perspective of carbon emission, ammonia refrigeration system will always be used in the future.However, due to the toxic, flammable and explosive properties of its products, some places and environments have been restricted.
Freon refrigeration system has a high energy consumption and a high global warming index. In the pipe library of some barrel pump systems, the leakage supplement of refrigerant is large. Its carbon emission is higher than that of energy consumption, and the comprehensive carbon emission is particularly high.It will be gradually reduced in the future cold storage application. Because of its good safety performance, there are still many cold storages used at present.
The energy consumption of carbon dioxide system is equivalent to that of freon, but its GWP is 1. The carbon emission from leakage and supplement during operation is also small, and the comprehensive carbon emission is moderate. It is a product of replacing Freon storage.However, its physical properties are quite different from those of ammonia and Freon systems. In the application of cold storage, the maintenance requirements are high, and the low-temperature defrosting is constrained. We still need to continue to explore in the development of cold storage.
The coolant refrigeration system is an indirect refrigeration system. Its main function is to cooperate with the refrigerant system to reduce the system charge.It is combined with ammonia refrigeration system to reduce the level of hazard sources, and with freon to reduce carbon emissions. Its energy consumption is slightly higher than that of Freon system, and its comprehensive carbon emission is low. It is an essential supplement in the future application of cold storage.
The exploration of refrigerants has been ongoing. The characteristics of safety, low carbon, energy saving and low investment will also be the ultimate direction of the refrigeration system of cold storage.
Glacial Coolant on the coolant refrigerant system and its application.
Energy Consumption Control of Coolant System
The application of coolant system has been very common.For example, pharmaceutical chemical industry, refrigeration, HVAC, heat pump and other systems.As the leading enterprise of domestic coolant carrier, glacier coolant has been supplied by more than 2000 enterprises, including new projects and transformation projects. The use effect has been highly praised, but the energy consumption in the use process is different. The owner often mentions the matter of energy consumption. Through our field investigation and analysis, we provide the owner with some opinions on energy conservation and emission reduction.
The first control point is mainly in the design stage. It is necessary to design a matching coolant system according to the physical properties of the refrigerant, so that the coolant pump, refrigeration compressor and end heat exchange can operate at the most efficient point. Such a system is the best for energy saving.This method is only suitable for new projects or projects with complete refrigeration system transformation.
The second control point is the selection of coolant. The design institute has little understanding of the physical properties of coolant. Generally, the physical parameters of ethylene glycol or brine are queried, and the parameters obtained are often insufficient, which will have a certain impact on the calculation.Finally, there will be high energy consumption in the process of operation.The energy consumption of the reconstruction project is generally high, so it is particularly important to select a suitable coolant, which can directly reduce the energy consumption. It is not an exaggeration to say that it is also possible to save 50% energy.
The third control point is the daily operation and maintenance. During the operation process, there are often gases entering the system. The filter or system impurities lead to the increase of system operation energy consumption, which requires regular maintenance.The physical parameters of the coolant need to be tested every year and adjusted in time to ensure the stable and efficient operation of the system.
The operation energy consumption of the coolant system is a whole process control, and each link needs to control the energy consumption.
Under the concept of carbon neutralization, the cooling system also needs fine control.This process requires a close combination of the design unit, the owner and the coolant manufacturer. As a coolant manufacturer, glacier coolant provides cooling system solutions to track the whole process of the project and realize energy conservation and emission reduction of the system.