Application of Modified Polyfluorocarbon with Glacier Coolant in Electronic Coating Agent
Nowadays, human life is increasingly inseparable from electronic equipment – communication, education, entertainment and industry.From consumer products such as smart phones and wearable devices to professional industrial fields such as automation control or artificial intelligence, electronic products are everywhere – many of them are used in challenging environments and need to protect internal components and exposed screens and surfaces.Designers and developers are always looking for a lightweight, reliable and suitable protective product for their manufacturing process.
Glacier coolant has been committed to the breakthrough technology of fluorinated liquid, which can be used to manufacture electronic coating agents to meet the needs and expectations of manufacturers and end users.
Protection equipment elements
The interior of each electronic device forms a complex and compact network composed of printed circuit board (PCB) circuits and micro components.These components are susceptible to corrosion, which will affect the reliability of the equipment and shorten its service life.The coating agent can not only effectively protect the equipment but also be cost-effective.
Screen and glass of protective equipment
Most users experience electronic devices through a touch screen. Adding an easy to clean coating on the surface of glass and glass sample can improve the appearance, tactility and functional use of the equipment.
♦easy to clean: easily wipe to keep the appearance of the equipment in the best state
♦anti pollution: prevent stains from adhering and remaining
♦easy to apply: dry in a few seconds, heat curing to enhance chemical resistance and wear resistance
♦no need to use expensive plasma vapor deposition (PVD) equipment
Application of Coolant in wine
In order to produce high-quality wine, it is very important to control the appropriate fermentation temperature in the process of grape juice cooling, clarification and fermentation.At the same time, there are colloidal substances, Tartrates and polyphenols in the wine that has just been fermented and filtered and clarified. When the environmental temperature changes greatly, haze or even precipitation will occur, which will affect the sensory quality and flavor of the wine.In addition, the fermentation process will release a large amount of heat, which will increase the temperature and affect the quality of the wine.Based on the above process requirements, it is more appropriate to select the coolant system.
The conventional coolant is mainly ethylene glycol, propylene glycol and other coolant with good cooling effect and temperature maintenance,However, the system has some corrosion problems after a long time,There is a risk of coolant leakage into the wine, so many wine manufacturers choose propylene glycol with lower toxicity. The price of propylene glycol is generally 3-4 times that of ethylene glycol, and the production cost is increased. Finally, the corrosion problem of the system has not been solved.
Glacier coolant has provided professional coolant in many wineries, which has solved the corrosion problem of equipment,Therefore, LM-4 type coolant can be used for the selection of the carrier coolant. The price is lower than that of propylene glycol, and the specific heat, thermal conductivity and viscosity are lower than those of propylene glycol, and the operating energy consumption is also low. It is a good choice.
Low temperature treatment is to reduce the temperature of newly produced wine to – 5 ℃, increase the stability and sensory quality of wine, and reduce the acid and astringent taste.The clarification temperature is generally 5 ℃, the red wine fermentation is 24 ~ 26 ℃, the white wine fermentation is 19 ℃, the low temperature treatment temperature is – 5 ℃, and it needs to be kept for 15 days at – 5 ℃.
The glacier coolant system can control the temperature accuracy of each link, reduce the operating cost of the system, and ensure the quality of wine.
Application of Low Carbon Building Coolant
Low carbon building refers to reducing the use of fossil energy, improving energy efficiency and reducing carbon dioxide emissions throughout the life cycle of building materials and equipment manufacturing, construction and building use.
At present, low-carbon buildings have gradually become the mainstream trend in the international construction industry.An often overlooked fact is that buildings account for almost 50% of the total carbon dioxide emissions, which is much higher than that in transportation and industry.The energy control of air conditioning in summer and heating in winter is the main part of carbon emission reduction in the life cycle.
The core of how a building can achieve zero carbon emission is energy storage, which is not only limited to the storage of electric energy, but also a storage of thermal energy and cold energy.
In summer, the solar energy and thermal energy are relatively abundant. The thermal energy is stored by the coolant and indirectly converted into domestic hot water. The cold source of the air conditioner is provided by the absorption refrigeration unit. The electric power of this system will be very small. It can realize self-sufficiency through solar power generation and storage for use, and realize zero carbon emission of the air conditioner in summer.
In winter, the load of the building is divided into the inner area and the outer area. The outer area needs heating and the inner area needs cooling. This kind of system has higher requirements on the coolant. In winter, the cooling in the inner area can directly exchange heat with the outdoor air through the coolant. In addition to using solar energy, the hot water in the heating area also needs to provide a backup heat source. The backup heat source uses a heat pump for heating, so as to realize the complementation of the cold energy in the inner and outer areas. In addition, the domestic hot water also needs to be produced by a heat pump.
Coolant is very important to the coupling of building cold and heat sources.On the premise of meeting the physical property requirements, the safety performance such as toxicity and flammability must also be paid attention to.Glacier coolant environmental friendly coolant is safe and stable, For the use of zero carbon energy venues.
Maintenance of Coolant system
In air-conditioning engineering, industrial production and scientific experiments, coolant devices are often used to indirectly cool the objects to be cooled, or the cooling capacity generated by the refrigeration device is transmitted over a long distance, which can solve some problems that are difficult to be solved by direct cooling refrigeration devices.
Due to the simple operation and maintenance of the system, some problems are often ignored.There is a cold storage water tank in the secondary pump circulation system. Generally, the water tank is open and connected with the atmosphere. In the long-term use process, because the water vapor partial pressure of the air is greater than the surface partial pressure of the coolant solution, the water in the air will enter the system.For some small systems, the impact of freezing point is more obvious, so small systems need to test and record their freezing point on one side every two to three months.Due to the large volume of the large system, the opening of the water tank is treated with a breather valve. Due to the relatively small amount of water migration, the measurement and recording time can be once a year. If problems are found, they can be handled as soon as possible to reduce the cost of adjusting and distributing the coolant in the later stage.The above is mainly for the maintenance of water-soluble coolant system.
For the non water permeable coolant system, the closed system is generally considered in the design process, and the coolant storage tank is also sealed by nitrogen to prevent moisture from entering.During the operation and maintenance of such systems, it is necessary to record and compare the pressure of the system. During the equipment maintenance process, air or some impurities will inevitably enter, which will accumulate at the filter in front of the water pump and coolant heat exchanger, and the moisture in the air will become ice. At this time, the pressure at the inlet of the pump will be low. If it is lower than the atmospheric pressure, air will invade the system and produce a vicious cycle, Therefore, this item needs to be included in the inspection process of the system.
Although the operation and maintenance of the coolant system is simple, it still needs fine management. Glacier coolant focuses on the coolant and application system, and provides professional operation and maintenance solutions.
Discussion on Ultra-low Temperature Coolant
There are many kinds of coolant, which are mainly classified according to physical components, but rarely classified according to temperature.Usually, temperature is only an important parameter in model selection. The minimum freezing point temperature of commonly used coolant is generally -40 ℃, and the lower temperature can be defined as ultra-low temperature.And this temperature range is quite broad -40~-145 ℃.-40~-60℃In application, it can be divided into several lower levels. The optional models in the temperature range of -40~-60 ℃ are mainly LM-8 and LM-11.
LM-8 has no flash point and is non-toxic, which is more suitable for immersion freezing or some low-temperature material treatment, while LM-11 has a relatively high flash point, which is suitable for some thermostatic water tanks or industrial applications. This temperature range is applicable to more.-60~-100 ℃, which is a relatively low temperature range, is suitable for scientific research and laboratories.
LM-1/LM-6/LM-14 have different models to choose from. LM-1 and LM-6 have flash points. When using, the system needs explosion-proof design. In addition, the coolant itself is toxic, and personnel should avoid contact during operation.
LM-14 is non-toxic and has no flash point, but the price is relatively expensive. It is a good choice for small experimental systems.In the temperature range of -100~-145 ℃, it is less applicable.
Generally, liquid nitrogen or liquefied gas gasification is used in industries to achieve low-temperature control, but some industries need stable temperature control and continuous operation. Coolant is an ideal choice, and the selection range of coolant in this temperature range is relatively small. LM-6 series models can be as low as -145 ℃.Ultra low temperature coolant is still a relatively wide range, and it is necessary to make an overall selection of the physical properties, toxicity and flash point of the coolant according to the applicable place. In some special processes, an overlay system between the coolant is also required, which makes the coolant into multiple cycles and then superimposes.
At present, there is little research on the application of ultra-low temperature coolant. Glacier Coolant will independently build an Engineering Application Laboratory of ultra-low temperature coolant.
Application of coolant in air source heat pump
The function of air source heat pump is: an energy-saving device that can make heat flow from low-level heat source air to high-level heat source.It is a form of heat pump.As the name suggests, heat pumps, like pumps, can convert low-level heat energy that cannot be directly used (such as heat contained in air, soil and water) into high-level heat energy that can be used, so as to achieve the purpose of saving some high-level energy (such as coal, gas, oil, electricity, etc.).As the demand for cold sources is becoming more and more diversified, the functions of refrigeration and heating are often integrated in a set of equipment.It is common in cold winter and hot summer areas, but in some buildings without heating conditions in the north, air source heat pump products for coolant appear.
In winter, when the outdoor weather may be lower than -20 ℃, in order to maintain the stability of the system, a heat storage box is required. When the outdoor temperature is high, heat storage is carried out in advance. At night or when office work is required, the heat pump is supplemented to release heat energy due to the reduced heating efficiency.Fan coil units are generally used at the end, which are heated in winter and cooled in summer.The coolant in the system needs a high-low temperature switch. The high temperature can reach 60 ℃, and the local minimum temperature in winter may reach -35 ℃ when the low temperature is not used. In addition, there are many materials in the system, such as copper, iron, aluminum, PPR and so on. Therefore, the low-temperature heat pump system has high requirements for the coolant.Conventional automobile antifreeze is prone to corrosion in the process of use, and the system efficiency is seriously reduced.The coolant developed by the glacial coolant pharmaceutical chemical industry has stable performance, and the operating condition is -35~120 ℃, which is practical for low-temperature air source heat pump.
In the operation of heat pump system, the secondary pump system is generally used.It is appropriate to use the water tank of the coolant pump as a closed water tank.If it is an open water tank, under the operating condition of the heat pump in winter, the coolant evaporates quickly, and it is easy to cause the drift of the physical parameters of the coolant when the coolant is supplemented in the later stage. In summer, the low-temperature operation is easy to cause moisture absorption and the freezing point moves up. Therefore, the low-temperature coolant heat pump system needs to regularly detect the physical properties of the coolant and take protective measures. glacial coolant is provided with lifetime free testing.
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.