The normal and safe operation of the chiller is inseparable from the refrigerant. It is the working medium that circulates in the chiller refrigeration system to achieve refrigeration. The commonly used refrigerant types for chillers are: R22, R407C, R404A, R410A, R134A, R507... Because R22 refrigerant is not environmentally friendly, most countries have now banned the use of R22. Therefore, for Omar chillers, high temperature The chiller uses R407C refrigerant, and the low-temperature chiller uses R404A. Of course, R134a, R410A, etc. can also be used according to user requirements. So, how to choose the appropriate refrigerant type for the chiller?

R22: Because R22 destroys the ozone layer, many countries have now banned the use of R22. Therefore, the chillers we export are generally R407C systems, unless customers require special requirements.

R407C: R407C is a mixture of R32 refrigerant and R125/refrigerant plus R134a refrigerant in a certain proportion. It is an environmentally friendly refrigerant that does not destroy the ozone layer. R407C has very similar characteristics and performance to R22, so it has become a long-term alternative to R22. At present, it is the most widely used refrigerant in the chiller system, which is environmentally friendly and economical. The chiller with R407C refrigerant is affordable.

R404A: As R404A belongs to the HFC type non-azeotropic environmentally friendly refrigerant (completely does not contain ozone-depleting CFC, HCFC), it is currently recognized and recommended by most countries in the world as a mainstream low-temperature environmentally friendly refrigerant. It is widely used in low-temperature chiller systems. middle.

R410A: It is a new environmentally friendly refrigerant that does not contain chlorine and does not destroy the ozone layer. Because the working pressure is about 1.6 times that of the ordinary R22 chiller, the cooling (warming) efficiency is high, and the material requirements for the chiller condenser and evaporator are Higher, therefore, the price of R410A chiller is higher than R22 and R407C. The new R410A refrigerant is composed of two quasi-azeotropic mixtures R32 and R125 each with 50%, mainly composed of hydrogen, fluorine and carbon elements (expressed as hfc), which is stable, non-toxic, and superior in performance. R410A was once recognized as the most suitable refrigerant to replace R22, and it has been popularized in Europe, America, Japan and other countries. R410A replaces the global trends in major international markets and prospects for its use and the dynamics of entering the international market.

R134a (is one of the most widely used medium and low temperature environmentally friendly refrigerants. It has good comprehensive performance, making it a very effective and safe alternative to R12 (dichlorodifluoromethane), which can be applied to the use of R12 refrigeration In most areas of refrigerant. Because the cooling effect of R134A is much lower than that of R22 and R407C, the cost of the R134A chiller system is much higher than that of R22/R407C under the same cooling capacity requirement.

If you don’t know how to choose the type of refrigerant for your chiller, Call us, Get your right cooling water system!

The air-cooled chiller is a kind of industrial chiller, and the main working principle is not much different from that of the water-cooled chiller. Air-cooled chiller is a machine that cools water at room temperature to a certain temperature through the compressor of the chiller. It is generally common in industrial manufacturing. However, air-cooled chillers are widely used, mainly for high-speed electric shafts, electric Spindles, CNC machine tools, etc. Because the air-cooled chiller has a lightweight structure and is easy to move quickly, the air-cooled chiller is favored by various industrial fields.

The heat dissipation fins can also be called fin condensers or fin coil heat exchanger. They are an important part of air-cooled chillers for heat dissipation and refrigeration. Its main function is to cool and condense the superheated steam of the high-temperature chiller discharged from the refrigeration compressor into a liquid. The refrigerant is The heat is released from the condenser and the cooling medium is taken away, so as to ensure the normal and effective operation of the industrial chiller. However, after the radiating fins are used for a long time, some ash layer or impurities will be adsorbed on the fin condenser. Only by cleaning the condenser of the industrial chiller can the efficient use of the industrial chiller be ensured.

So how to clean the cooling fins (condensers) of industrial chillers? Oumal Chiller recommends that you can use an air gun to clean it, but it should be noted that because the fins on the condenser are thin, the air pressure of the air gun cannot be adjusted too high, otherwise the condensation will be damaged when the dust is cleaned from finned coil heat exchanger.

At the same time, when using the cooling fins of the industrial chiller, pay attention to the maintenance and maintenance of the cooling fins. The cooling water of the industrial chiller is regularly replaced to prevent too much scale. Regularly check the pipeline corrosion of industrial chillers and the tightness of the pipeline to avoid pipeline blockage and perforation leakage accidents. It is recommended to purchase a fully enclosed circulating pipeline, which is safer. If your industrial chiller does not run for a long time, you should remove the water in the condenser and circulating water pump to avoid freezing the refrigeration equipment.

During the use of the chiller, cleaning and maintenance are also particularly important. Regular cleaning and maintenance can make our air-cooled chillers have a longer life and better cooling effect.

 

If you buy air cooled chiller unit from Oumal, the chiller water fan coil unit need to Clean regularly. If you have other questions about how to clean the chiller or shell and tube cleaing. Please contact us.

The structure of low-temperature chillers is similar to that of piston chillers. Low-temperature chillers generally refer to chillers whose outlet temperature is less than or equal to 5°C. They are mainly used for process cooling in food processing, chemical, pharmaceutical and other industries. Low-temperature chillers are usually used for low-temperature requirements on certain special production lines in the industry. Low-temperature chillers can generally reach about -40°C.

Low-temperature chillers are quite different from conventional chillers in terms of unit design due to the lower temperature of the outlet water. The most basic difference is that on the chilled water side, the cryogenic unit needs to be added with the appropriate type and concentration of antifreeze. Low-temperature chillers include low-temperature air-cooled chillers, low-temperature water-cooled chillers, low-temperature screw chillers, and low-temperature piston chillers. So how to control the temperature of the outlet water of the low-temperature chiller?

The main refrigerants used in low-temperature chillers are ethylene glycol solution, sodium chloride solution and calcium chloride solution. Their operating temperatures are as follows: ethylene glycol solution 4～-20℃, sodium chloride solution -15～-25 ℃, calcium chloride solution -20～-45℃. The chiller that has used glycol as the refrigerant is also called glycol chiller. The water supply temperature of the low-temperature chiller is determined according to user needs. However, it should be noted that the condensation point of brine is related to the concentration of brine. Therefore, the brine concentration of the equipment must ensure that it freezes inside the evaporator of the chiller. The actual operating temperature should be 5～8℃ higher than the freezing point of brine. Secondly, it should be noted that the concentration of sodium chloride solution and calcium chloride solution must not exceed their eutectic concentration.

In addition, sodium chloride solution and calcium chloride solution have a corrosive effect on metal materials. Corrosion inhibitors should be added during use to adjust the pH of the solution to 7.0-8.5. Add sodium dichromate as a corrosion inhibitor, the addition amount is: add 3.2kg sodium dichromate per 1 cubic meter of sodium chloride solution, and add 2kg sodium dichromate per 1 cubic meter of calcium chloride solution.

Controlling the outlet temperature of low-temperature chillers can not only increase the cooling capacity of low-temperature chillers, but also help companies increase production. Omar Refrigeration provides customized production of low-temperature chillers. According to the customer's water temperature, water tank size, compressor type, and type of refrigerant, it provides customized chillers. For the price of low-temperature chillers, please contact us for the most detailed solution.

Water cooled screw chiller is a water to water chiller which compressor use semi-hermetic screw type. It’s high efficient water chiller system. The cooling water system including a water cooled screw chiller, a cooling tower, a water tank, and 3 water pumps. Water cooled screw chiller is widely used in the industrial cooling system. High pressure failure of the water cooled screw chiller is the common failure when it working. While how to deal with the high pressure failure of the water cooled screw chillers. Blow let’s talk with the Possible causes and solutions of the high pressure.

1. The temperature of the chiller is too high and the condensing effect is not good. The rated working temperature of the cooling water required by the water-cooled screw chiller is 30℃-35℃. The high water temperature and poor heat dissipation will inevitably lead to excessive condenser pressure. Occurs in the high temperature season, the reason for the high water temperature may be: cooling tower failure, such as the fan is not turned on or even reversed, the water distributor does not rotate, it turns into the high temperature of the cooling water, and rises rapidly, the external temperature is high, the water path is short, and the recyclable water is less If the cooling water temperature has been maintained at a high level, it can be solved by adding a storage tank.

2. The cooling water flow is not enough to reach the rated water flow. The main performance is that the pressure difference between the inlet and the outlet of the unit is reduced (compared to the pressure difference at the beginning of the system operation), and the temperature increases. The reason for the insufficient water flow is the system Lack of water or air. The solution is to install an exhaust valve at the height of the exhaust pipe. The pipe filter is blocked or selected too fine, and the permeability is restricted. The appropriate filter should be selected and the filter screen should be cleaned regularly. The water pump is very small. The system does not match.

3. Scaling or clogging of the condenser of the screw chiller. Tap water is generally used for condensate, which is prone to scaling when the temperature is higher than 30°C. Moreover, because the cooling tower is open and directly exposed to the air, dust and foreign objects can easily enter the cooling water system, causing dirt to block the condenser, small heat exchange area, low efficiency, and affecting water flow. Its performance is that the pressure difference and temperature between the inlet and outlet of the unit become larger, making the condenser temperature very high, and the copper pipe at the condenser outlet is hot. The equipment should be backwashed regularly, and chemical cleaning and descaling should be carried out when necessary.

If you have a water cooled chiller system, you should now how to deal with some failures, Or you can contact us to help solving the problems. If you are looking for a water cooled screw chiller system, please contact us, We will provide you the suitable solution with good price. OUMALCHILLER is specializing in industrial cooling systems for many years. High quality screw chiller will save your time and money.

Air-cooled chillers are the most widely used chillers. They are widely used in plastics, electronics, chemicals, metallurgy, video pharmacy, electroplating, leather, crafts and scientific research in industry; they are widely used in hotels in business., Hotels, supermarkets and theaters. Air-cooled chillers are also the easiest chillers to install. Since the entire system of air-cooled water chillers is equipped with fans for heat dissipation, chilled water pumps, and chilled water tanks, customers only need to connect the chilled water inlet and outlet to their own equipment to be chilled to start use.

The following is the air-cooled chiller structure:

 

When some customers buy chillers, they worry that they do not know how to install them after they buy them. In addition, the chiller suppliers are far away and it is not inconvenient to install them on site. In fact, these problems are very simple. Oumal chiller specializes in producing chillers for many years. And will provide chiller installation instructions, installation drawings, etc to customers., no need to worry about the installation of air-cooled chillers.

The following is the installation diagram of the air-cooled chiller

 

Do you know how to install an air-cooled chiller now ? If you have any further questions about installing the chiller, please feel free to contact us. OUMAL can also provide water-cooled chillers, screw chillers, and water-cooled chillers. We will talk to you in the following blogs.

The chiller for cooling the plastic extruder machine is called a plastic extrusion chiller. Since the extruder machine is mainly used for various extruded plastic products, such as PE, PP, PVC, ABS, etc., the high temperature generated during the production process will cause difficult demolding and slow molding, so a industrial water chiller is required to provide low-temperature  circulation Cooling Water (5-30°C) is fed to the extrusion production line to shorten the cooling time and improve product quality.

 

What are the products produced by the extruder? For example, rigid pipes, hoses, profiles, glue sticks, automotive glass sealing strips, cables, corrugated pipes, packaging bags, door and window sealing strips, etc. These products are common in our daily lives. Can you imagine how they are produced Come out? Closer to home, what points should be paid attention to when choosing a chiller for the extruder machine ?

 

1. Customers who make pipes are best to have their own pool, so that when the temperature is low enough in winter, you can use the cooling water in the pool to meet the requirements of the production process.

2. Customers who make pipes generally use an extruder, and the extruder will have an open water tank, so when choosing a chiller, you should generally choose a shell and tube evaporator, so that the water can circulate, of course. There will be some special situations, which all depend on the situation on the spot.

3. When the extruder extrudes the pipe, it will emit a lot of heat in a short time, so when choosing a chiller, choose a relatively large one

4. But the temperature of the chiller is not as low as possible. Generally, the temperature of 10-15 degrees is better.

5. When choosing a chiller, it is best to know the temperature of your sink, the amount of water used per hour, and the temperature of the return water, so that you can be more prepared to choose your own chiller

6. The extruder is equipped with a water chiller because there will be pools and water cooling towers, so water-cooled chillers are generally used. ,

 

Many extruders choose to use chillers for cooling and cooling, and the effect is more stable than external circulating water. When selecting the chiller for the extruder, it can be calculated by this method: the production capacity of the extruder KG/h*165=Kcal (kcal)

If you are looking for a chiller for you plastic extrusion machine. Please contact us to get the plastic extrusion chiller price.

Industrial chiller is a kind of high-efficiency refrigeration equipment widely used in industrial production. It can provide great help for various industrial productions. However, if the antifreeze position of the low-temperature chiller has dropped, it needs to be dealt with in time. In order not to affect the stable operation of the equipment, or even reduce the overall cooling performance of the equipment, to increase the antifreeze capacity of the low-temperature chiller in low-temperature areas requires the following skills

1. For the screw chiller, the amount of antifreeze is not the better, and when adding, the overall concentration of the antifreeze can be reduced, and the best filling effect can be obtained. The lower the concentration, the smallest range of influence on the screw chiller during operation. By carefully analyzing the operating environment and adding a suitable amount of antifreeze for screw chillers, the probability of equipment failure can be reduced.

 

2. The shorter the replacement period of antifreeze, the better. When using a screw chiller, in order to maintain the safe and stable operation of the equipment, it is necessary to determine the specific replacement period of the antifreeze of the screw chiller according to the use environment. The shorter the replacement cycle is, the stability of the antifreeze can be maintained, so as to achieve the effect of protecting the stable operation of the screw chiller.

 

It can be said that antifreeze is a professional condensing agent necessary for professional refrigeration of many industrial chiller products, and it is also an efficient refrigeration substance. For industrial chillers, the amount of antifreeze is not the better, and when adding, the overall concentration of the antifreeze can be reduced, and the best filling effect can be obtained.

Industrial chillers also have industry specifications and standards for antifreeze requirements. When using antifreeze, they must be used in accordance with the application standards. The lower the concentration, the various impacts on the industrial chiller during operation. At the minimum, by carefully analyzing the operating environment and adding a suitable amount of antifreeze for low-temperature chillers, the probability of equipment failure can be reduced. Both chillers and low-temperature chillers are inseparable from antifreeze.

In winter, the use of industrial chillers is inseparable from the addition of antifreeze. The full name of its antifreeze is called antifreeze coolant, which means a coolant with antifreeze function, which is mainly used for antifreeze in the winter.

 

The requirements of Oumal industrial chiller for antifreeze performance:

1. Stable chemical performance.

2. Good antifreeze performance.

3. The low temperature viscosity is not too big.

4. Anti-corrosion and anti-rust properties.

5. It has no swelling and corrosive properties to rubber sealed conduits.

 

How to choose the antifreeze for the chiller?

In order to greatly improve the cooling performance of the chiller, after a period of use, users need to maintain the chiller regularly. During maintenance, especially in winter, do not neglect to replace the antifreeze for the chiller. If the chiller is maintained without replacing or adding antifreeze, the cold temperature in winter can easily cause freezing of the pipe. When the chiller is operated for a long time, the equipment is prone to various common failures, which will seriously affect the service life of the equipment , Even leading to the continuous increase in the cost of using the chiller.

 

High-quality antifreeze can not only maintain the safe and stable operation of the chiller. If the replacement of the antifreeze is often neglected when the chiller is maintained, the equipment will run for a long time and be prone to high temperature failures. When the chiller is at a high temperature, it not only affects the operating power of the chiller, but also causes the operating life of the chiller to continue to shorten. The shortened lifespan of the chiller affects the cost of the company's use of the chiller, and the longer the company uses the chiller, the more energy it consumes.

So, how to choose the antifreeze for the chiller?

1. When choosing an antifreeze product, in order to maintain the safe and stable operation of the equipment, it is necessary to periodically select a lower concentration antifreeze for replacement.

2. When buying antifreeze for chillers, you need to choose a product with a longer period of time. If the chiller is used for a long time and the probability of equipment failure is low, then the cost of replacing the antifreeze for the company can be fully controlled. The longer the antifreeze is used, the lower the cost of replacing the antifreeze, thereby extending the life of the chiller. The longer the life of the equipment, the higher the cost-effectiveness of the company's use of industrial chillers, ensuring that the company can complete production tasks at low cost.

 

When replacing antifreeze products, you need to choose an antifreeze that meets the equipment operating standards. If the operating index of the antifreeze is low, it is easy to cause common failures of the chiller and endanger the operational safety and life of the equipment. Replacing the antifreeze that is suitable for the equipment can prolong the service life of the antifreeze and provide conditions for saving the cost of operating industrial chillers.

 

The commonly used antifreezes mainly include:

① Ethanol, the freezing point and boiling point of ethanol are relatively low, in order to prevent fire, it is generally not used.

②Glycerin, mixed with water, is very expensive and not very economical.

③ Ethylene glycol, the freezing point of ethylene glycol is -11.5°C and the boiling point is 197.4°C, and the lowest freezing point after mixing with water can reach -68°C; ethylene glycol is easy to corrode metals, and anti-corrosion agent should be added when preparing antifreeze. Generally, add 2.5 to 3.5 grams of disodium hydrogen phosphate and 1 gram of dextrin per liter of antifreeze; ethylene glycol has strong hygroscopicity, and the storage container should be sealed; ethylene glycol is not easy to volatile, and the amount used in preparation is small, so it is widely used. The thermal expansion of various antifreeze fluids is relatively large, and can only be added to 95% of the total capacity of the cooling system when filling; when the antifreeze fluid is deployed, its freezing point should be 5 degrees lower than the lowest temperature in the area of use.

 

Oumal specializes in the production of various types of chillers, ice water chiller machine, screw type chillers, scroll type chillers, screw type low temperature chillers. For more water chiller prices, please contact us, we will provide high-quality Water chillers, and preferential water chiller system prices, provide a low-temperature cooling water system for your production, and provide product quality and cost.

It is inevitable that the chiller will produce sound when it is working. For example, when the fan rotates, the fan blades rub against the air, it will produce sound. Normal sound is allowed. However, even the sophisticated refrigeration equipment will appear after a long period of use. Fault. Then, the editor of Oumal Chiller will take you to understand the causes and solutions of the noise produced by the chiller.

First, find the reason from the parts that are easy to check and observe:

1. Are the anchor screws loose?

The chiller is fixed on the ground. After running for a long time, the anchor bolts will be loose, and the chiller will be unstable, which will cause noise. This situation can be solved by replacing the anchor bolts, and vibration reduction can also be installed if conditions permit. The purpose is to make the chiller firmly fixed on the ground.

2. Whether the connecting pipeline is firm

There are large and small pipes on the chiller, connecting the chiller, cooling equipment and other auxiliary devices. If the connecting screws are loose, noise will be generated after operation. The solution is to fix the pipes and equipment.

3. Is there any problem with the fan?

The air-cooled chiller is equipped with a fan fan, which is composed of a fan cover and blades. The blades are deformed by external force and will generate noise after rotating. The fan cover will also cause noise due to the entry of dust and debris. Replace the blades and regularly clean the top of the fan. Sundries can reduce noise.

Then we observe whether the following parts have abnormal noise:

4. Whether the water pump makes abnormal noise

The reason for the abnormal noise of the water pump is mostly due to the water quality, which is not clean enough, which causes the water pump pipe to be blocked, causing abnormal noise at work and generating noise. The circulating water needs to be treated to meet the requirements of the chiller.

5. Whether the compressor has abnormal noise

Compressor abnormal noise is a relatively important problem. Because the compressor is the "heart" of the chiller, special attention should be paid to abnormal noise. The main reasons for compressor abnormal noise are as follows:

Reason 1: Liquid refrigerant enters the compressor

Once the liquid refrigerant enters the compressor, because it cannot be compressed, the hydraulic pressure will cause liquid shock to the internal structure, resulting in vibration or noise. In addition, too much refrigerant will dilute the refrigerating oil and cause wear of mechanical parts.

Solution: Check whether there is too much refrigerant, and release excess refrigerant; check the opening of the expansion valve, whether it is too large, and adjust it in due course.

Reason 2: Excessive refrigerant oil causes liquid shock

Solution: Check the condition of the refrigerating oil in the compressor and adjust it to an appropriate amount.

Reason three: abnormal noise of compressor cylinder and crankshaft

Generally, it is caused by the lack of lubricating oil, causing abnormal wear of the internal components of the compressor, causing abnormal noise, and also affecting the operation of the compressor and reducing the service life of the equipment.

When this happens, the compressor needs to be repaired or replaced. It is worth noting that regular inspections of the chiller and compressor condition can effectively avoid this situation.

Some people in the industry have encountered this situation. Due to the poor return of oil in the oil return pipe and the lack of refrigerating oil, the compressor crank sleeve is damaged, which generates louder noise and aggravates wear.

It is normal for a chiller in normal use to have a little sound, but irregular and sudden noises must arouse our attention. Briefly summarize the following reasons for the noise of the chiller: loose connection screws, abnormal noises of fans, fans, and water pumps. , Excessive refrigerant, excessive refrigerating oil.

In the market, there are many screw chillers manufacturers, and the prices of screw chillers with the same cooling capacity vary greatly.

First of all, it depends on the type of screw chiller, whether it is an air-cooled screw chiller or a water-cooled screw chiller. Generally speaking, for the same cooling capacity, air-cooled chillers are more expensive than water-cooled chillers. This is because the COP of air-cooled chillers is lower than that of water-cooled chillers. In addition, the cost of air-cooled chillers is relatively higher than that of water-cooled chillers. Of course, the comparison price cannot be simple. Look at the price of the chiller, because the air-cooled chiller is easy to install and does not need to be used with other equipment. It can be turned on when connected to the power supply and water pipe, while the water-cooled chiller needs to be connected to the cooling tower and the water pump and the water pipe, making it easier to install. Complex, the cost of the entire system should also include these. What are the influencing factors for the price of the same type of chiller?

1. compressor

Compressor is an important factor in determining the price of screw chiller. Compressor is the core component of screw chiller. At present, the commonly used screw compressor brands on the market are: Hanbell, Bitzer, Fusheng, etc. Because the prices and performance of these brands of compressors are different, the selection of different compressors will make the whole screw type water chiller. The price of the machine is different. Hanbell compressor is the most commercially available brand of screw chillers in China. Compared with BITZER screw compressors, the price is cheaper and the performance is good. Of course, if the customer's budget is sufficient, the BITZER compressor brand will also be requested.

2. Type of evaporator

The type of evaporator will also affect the price of screw chillers. Shell and tube evaporators are commonly used in screw chillers. They all use high-quality externally threaded copper tubes, high-strength sealed structures, and strong heat exchange capabilities. Its main material, copper pipe, is also divided into good and bad, so the price will also be biased. In addition, if the chiller needs to take corrosive liquids, the material of the evaporator needs to use a titanium tube evaporator, or nickel white copper evaporator, 316 stainless steel evaporator, so the material of the evaporator is different, and the cost is also different, which naturally leads to The price of the chiller is different. When we confirm the plan with the customer, we must understand whether the liquid that the customer needs to cool is corrosive. Only in this way can a suitable evaporator be matched to avoid unnecessary losses.

3. Control System

The different control systems of screw chillers will also lead to differences in the price of screw chillers. Normally， China Chiller factory uses PUNP control panels for the control system of screw chillers. PUNP control panels also have button-type and touch-screen types. , The price is naturally different, we generally use Siemens PLC control system for customers, which is convenient for customers to program and set by themselves, and also customize according to customer special requirements, such as Omron PLC, WEINVIEW man-machine interface... Oumal Refrigeration is committed to For industrial refrigeration systems, we can customize cooling water systems for customers, and help customers improve product output and quality with preferential chiller prices.

Therefore, when purchasing a screw chiller, you should not only ask about the price of the screw chiller, but also compare the configuration of different screw chillers provided by different chiller manufacturers, so that you can buy the right one at an affordable price. Screw chiller. Similarly, when purchasing a screw chiller, you should also inform the manufacturer of the chilled water temperature used. Because the chiller outlet temperature is different, the chiller model will be different under the same cooling capacity requirement, and the compressor model used Naturally it is different. Omar provides various types of chillers, including: low temperature chillers, glycol chillers, sea water chillers, laboratory chillers, food-grade chillers. To get more chiller prices from OUMAL, please contact us so that you can buy cheap water chillers.

The evaporator is one of the main components of industrial chillers. The types of evaporators include: tank with coil evaporator, shell and tube evaporator, stainless steel plate heat exchanger, titanium tube evaporator. With so many types of evaporators, how should we choose the appropriate type of evaporator for our chiller?

Water tank coil evaporator: The evaporator is a coil type structure placed in the water tank. The coil-type evaporator of Omar Refrigeration is made as follows: According to the size of the chiller required by the customer, the copper pipes are coiled in a circle, and then the coil-type evaporator is put into the built-in water tank of the box-type chiller. In this way, the refrigerant in the copper pipe can absorb the heat of the water. The water tank coil evaporator is relatively simple to manufacture. The cost is relatively low. Generally, small water chillers use water tank coil type evaporators.

Shell and tube evaporator: Shell and tube evaporator is the most widely used in screw chillers, and different materials can be selected according to different water quality requirements. For example, the middle tube can be 316 stainless steel or copper tube, or nickel white copper, and the outer shell can be carbon steel or 316 stainless steel. The shell and tube evaporator has compact structure, convenient operation and management, and high heat transfer coefficient. The disadvantage is that the refrigerant charge is large, and when the evaporation temperature is lower than 0 degrees, it is easy to freeze and damage the evaporation tube.

Stainless steel plate heat exchanger: As one of the commonly used heat exchange equipment in heat exchangers, stainless steel plate heat exchangers have certain advantages. They can be used in food, heating, domestic hot water, waste heat recovery and other fields. The data displayed by the heat exchange equipment shows that the stainless steel plate heat exchanger has a better heat exchange effect than carbon steel, and it also prolongs the service life. Stainless steel plate heat exchangers are generally divided into 316L and 304 materials. 304 stainless steel plate heat exchanger has a wide range of uses, such as corrosion resistance, heat resistance, mechanical properties, and low temperature strength. The use temperature can be (-196℃-800℃). When customers of general chillers have requirements for water quality, we will generally equip chillers with stainless steel plate heat exchangers in the choice of evaporator.

Titanium tube evaporator: The titanium tube is light in weight, high in strength, and superior in mechanical properties. When the chiller is used with corrosive liquids, such as acidic liquids, we need to use a titanium tube evaporator. For example, in the electroplating industry, the electroplating solution is highly corrosive. If the chiller directly cools the electroplating solution, a titanium tube evaporator is required. , Titanium tube evaporator is also commonly used in fish pond chillers.

After reading the main features and uses of various evaporators, do you know how to choose the right evaporator type for your chiller? If you don’t know, please contact us and tell us where your chiller is used and the type of liquid that needs to be cooled. Oumal‘s professional engineers will choose the most suitable evaporator for your water chiller systems.