Industrial chillers can realize mutual switching, speed up production progress, reduce energy consumption, improve product molding efficiency, suppress product defects, and reduce the occurrence of defective products. Screw chillers are widely used in many fields such as electronics, rubber, plastics, papermaking, petroleum, chemical industry, food, machinery, brewing, vacuum coating, pharmaceuticals, etc., and are also widely used in places with centralized cooling to facilitate centralized management.

In industrial manufacturing, chillers are crucial to the transfer of heat. However, many chiller ma chines are prone to poor heat dissipation after a period of actual operation. At this time, product maintenance should be carried out in a timely manner.

First of all, let's clarify the signs of poor heat dissipation of the chiller. When the condenser of the chiller has poor heat dissipation, the efficiency of the compressor will decrease, and the operating current will increase, which will eventually lead to the air-cooled chiller high pressure. When the air-cooled high pressure rises to 24kg/cm2, the water-cooled chiller high pressure will rise to 20kg/cm2 is a sign of poor heat dissipation of the chiller. At this time, maintenance should be carried out in time.

Poor heat dissipation and treatment methods of water-cooled screw chiller:

When the heat dissipation of the condenser is poor, the efficiency of the compressor will be low, and the operating current will increase. The compressor will trip due to the protection of the high-voltage switch, causing the compressor to stop running. Whether the circulating water of the cooling tower is normal, whether the temperature of the cooling water is too high, whether the cooling tower fan pump is running, and whether the cooling water valve is open. After the above things are normal, you need to press the reset button again, or shut down and restart to operate normally. If high pressure overload occurs frequently, the condenser needs to be cleaned.

Treatment method for poor heat dissipation of air-cooled screw chiller:

1. Check whether thefin condenser of the chiller isdirty, if so, clean it with a small brush.

2. Check whether the fan of the chiller is working normally. If not, you can blow it with air or wipe it clean with a soft cloth dipped in some detergent.

3. Move the chiller to a well-ventilated place to avoid blocking the radiator.

4. If the heat dissipation performance of the chiller is still not good, you can consider upgrading the accessories of the chiller, such as fans, heat sinks or other components.

The above is Oumal's solution to the poor heat dissipation of the chiller. For more detailed information, please contact our Oumal manufacturer or Oumal sales: oumal@oumal.com.

Refrigerant leakage is a common failure of air-cooled chillers. To deal with refrigerant leakage of chillers, we must first understand the cause of refrigerant leakage and find out the cause of the failure to reduce losses caused by refrigerant leakage. If you have a refrigerant leak in an air-cooled chiller, it is important to address it promptly to prevent further damage and ensure the efficient operation of the system. Here are some steps to deal with a refrigerant leak:

Identify the Leak: Use a refrigerant leak detector or bubble solution to locate the source of the leak. Common areas where leaks occur include connections, fittings, valves, and joints.

Ensure Safety: Make sure to follow proper safety procedures when dealing with refrigerants. Wear protective gear such as gloves and goggles, and work in a well-ventilated area.

Repair the Leak: Depending on the size and location of the leak, you may be able to repair it yourself or contact a professional HVAC technician. Common repair methods for air-cooled chillers include tightening fittings, replacing faulty valves or gaskets, or soldering joints.

Evacuate and Recharge Refrigerant: If the refrigerant has leaked significantly, it may be necessary to evacuate the remaining refrigerant from the system using a recovery machine. Once the leak is repaired, vacuum the system to remove any moisture or air, and recharge it with the appropriate amount of refrigerant as specified by the manufacturer.

Test for Leaks: After the repair and recharge, test the system for any remaining leaks. Use a refrigerant leak detector or soap bubbles to carefully check all connections and areas that were repaired.

Monitor and Maintain: Regularly monitor the chiller system for any signs of leakage, such as reduced cooling capacity or unusual noises. Perform routine maintenance, including checking and tightening fittings, cleaning coils, and replacing worn-out parts, to prevent future leaks.

Remember, handling refrigerants can be hazardous and may require proper certification or training. If you're unsure or uncomfortable with dealing with refrigerant leaks, it's best to engage a licensed professional HVAC technician to assess and repair the leak.

Industrial chillers consume a lot of energy, especially in hot weather, and they have to work harder to maintain the desired temperature. In order to achieve the purpose of energy saving, users of various industrial chillers in the enterprise can combine their own actual operating environment to choose a suitable energy-saving solution for industrial chillers to improve the overall operating efficiency. Help enterprises complete all production processes with higher capital. Here are some ways to reduce your industrial chiller’s energy consumption during hot weather:

Optimizing Chiller Operating Conditions: Make sure your chiller is running at peak performance by regularly checking set points, temperature differentials, and water flow. Also, make sure the chiller is serviced and maintained regularly to avoid any inefficiencies.

Install a Variable Speed Drive (VSD): A VSD can be installed on the chiller's compressor to ensure the chiller is only running at its required capacity. This helps to significantly reduce energy consumption, since the chiller does not have to work at full capacity all the time. Equipped with a frequency conversion processing device, the high-quality frequency conversion device can achieve the effect of adjusting the speed of the compressor. If the low-pressure refrigerant can increase the pressure when it passes through the compressor, the speed of the centrifuge will cause a large-scale increase. The higher the pressure, the greater the load capacity it can provide. Use the frequency conversion processing device to work at an appropriate frequency according to the specific use environment, which can reduce the energy consumption level.

Rationally increasing the temperature of the evaporator and effectively increasing the temperature of the evaporator can improve the overall working efficiency. It provides higher evaporation in a shorter time, ensures the rapid condensation effect of the condenser, and has a great effect on quickly reducing the ambient temperature.

Recirculate with an economizer: An economizer recycles outside air to cool the water in the chiller. This is a very effective way to reduce energy consumption in hot weather, especially if the outside air temperature is lower than the return water temperature.

Improve insulation: Make sure the chiller and its components are well insulated to prevent heat loss. This helps reduce energy consumption because the chiller doesn't have to work as hard to maintain the desired temperature. Reasonably reduce the temperature of the condenser and reduce the temperature range of the condenser to adjust the entire low temperature to a lower level. The lower the temperature of the condenser, the faster the ambient temperature will drop, thus increasing the working power of the whole device.

Implement a maintenance program: A regular maintenance program helps to spot any inefficiencies in the chiller system and resolve them in a timely manner. This helps reduce energy consumption and extend the life of the chiller. Of course, this kind of maintenance is purpose maintenance. For example, you can start with the system. Only by doing a good job of maintenance can the equipment be used better and the efficiency will be greatly improved.

Consider Alternative Cooling Solutions: Depending on the application, alternative cooling solutions such as evaporative cooling or geothermal cooling may be used. In some applications, they are more energy efficient than traditional chillers.

Overall, reducing energy consumption of industrial chillers during hot weather requires a combination of regular maintenance, optimizing operating conditions and considering alternative cooling solutions.

Industrial chillers

can produce vibrations and noise during operation, so it’s important to take measures to reduce them. Here are some steps you can take to reduce vibration and noise in industrial chillers:



Choose an appropriate chiller model with high-quality components and sound insulation technology that help minimize vibration and noise.



Install the chiller on a solid and flat surface, and use rubber or vibration-damping pads under the chiller to help reduce vibration and noise.



Make sure there is enough space around the chiller, and avoid placing other equipment or items near the chiller to prevent interference that could cause vibration and noise.



Install sound-absorbing materials, such as acoustic foam or soundproof panels, on the sides of the chiller to reduce the reflection and propagation of sound.



Ensure that the chiller is properly maintained and cleaned on a regular basis, including replacing old vibration-damping pads or filters, to keep it running smoothly and reduce vibration and noise.



By following these steps, you can effectively reduce vibration and noise in industrial chillers and improve their efficiency and comfort in usage.

With the continuous improvement of domestic industrial production capacity, industrial chillers are more and more favored by enterprises. However, during the installation process of industrial chillers, some installation problems are often encountered. So how do we properly install an industrial chiller?

1. After unpacking the new machine, first check the accessories in the box according to the list, so as to avoid the failure of normal installation of the chiller due to the lack of accessories. After confirmation, follow the installation drawings and installation sequence provided by the chiller manufacturer. The water-cooled chiller needs to be installed with a cooling water system. After the cooling tower pipeline is installed, ensure that the water circulation is normal.

2. Please ensure that the working voltage of the chiller is stable and normal. Make sure the power socket is in good contact and the ground wire is grounded reliably. It is necessary to pay attention to whether the power cord socket of the chiller is connected well and the voltage is stable. The normal working voltage of Oumal standard chiller is 3ph-380V-50Hz. If it is indeed a special working voltage range, it can be customized separately. If the power frequency does not match, the machine will be damaged. Please use the 50Hz or 60Hz model according to the actual situation.

3. Check the installation environment and keep away from all kinds of flammable and explosive substances. The installation site of the unit must be the floor, installation pad or foundation, and its horizontal height should be within 6.4mm and can bear the operating weight of the unit. The unit should be placed in a computer room with a room temperature of 4.4-43.3°C, and there should be enough space around and above the unit for routine maintenance. One end of the unit should have space for the exhaust pipe for cleaning the condenser tube bundle, or a door hole or other suitable holes can be used. When the water source and the surrounding environment of the cooling water tower are harsh, the chilled water and cooling water circuits must be installed with Y-type filters and cleaned regularly. The highest part of the closed chilled water system must be installed with an automatic exhaust valve, and the lowest part of the system must be installed with a drain joint for the system to use. If it is an air-cooled chiller, it is necessary to ensure good ventilation and heat dissipation around the chiller fan port. Please ensure that the air inlet and outlet passages of the chiller are smooth, the air outlet above the chiller should be at least 50cm away from the obstacle, and the air inlet on the side should be at least 30cm away from the obstacle.

4. It is strictly forbidden to run without water. The water storage tank will be emptied before the new machine is packed. Please ensure that the water tank is filled with water and then turned on, otherwise the water pump will be easily damaged. The water-cooled chiller must ensure that the cooling water system circulates well.

Oumal will provide guidance before the customer installs the chiller. If the customer does not know how to install the chiller after receiving the chiller, please contact our chiller sales and we will provide professional help.

Air-Cooled scroll chiller VS Air-Cooled Screw Chiller

Functionally: The air-cooled screw chiller and the air-cooled scroll chiller have the same cooling function. The cooling, heating and energy are all electric energy.

Application industry: are mainly used in industry, medicine, plastic, food, coal, shopping malls and other industries.

It can be installed on the roof or outdoor courtyard, without the need for a dedicated machine room and cooling tower.

The smallest air-cooled screw chillers are 30HP/30Ton, while air-cooled scroll chillers range from 1HP/1Ton to 60HP/60Ton. The two categories differ on the basis of capacity range. Another difference is that screw chillers do not have a built-in water tank and water pump, while air-cooled scroll chillers have a water tank and water pump. Furthermore, it has a compact design, so it is easy to integrate. Unlike screw chillers with touch screens, air-cooled scroll chillers are equipped with an easy-to-use PID controller. The Oumal air-cooled screw chiller control system uses Siemens PLC + WeiView HDMI Touch Screen.

Unit characteristics comparison:

Features of air-cooled screw chiller:

Semi-hermetic screw type high-efficiency compressor, and there are single-machine system and double-machine system options. The unit has a compact structure and is easy to maintain. Adopting a new 5:6 multi-national patent asymmetric rotor tooth profile, the occlusion is tight, and the operation is stable; the use of high-efficiency motors is energy-saving and economical; the advanced intelligent defrosting method, the microcomputer analyzes the temperature of each point at any time, optimizes the defrosting cycle time, and ensures the removal of The frost is timely without affecting the heating operation, and the defrosting and heating are carried out at the same time, and the operation is more reliable and stable. Professional motor cooling device to meet harsh operating conditions. The unique design of the condensate pan eliminates the need for additional electric heating equipment, which completely eliminates the problem of freezing at the bottom of the coil during heating. A new generation of high-efficiency heat exchange tubes, the heat exchange coefficient is increased by 5%; the double-slot tube sheet hole design and advanced tube expansion technology make the structure more sealed and reliable, completely avoiding the possibility of mutual penetration. Economizer mode operation improves the cooling capacity and COP of the unit more effectively.

Features of air-cooled scroll chillers:

The use of fully enclosed scroll compressors, high-efficiency and high-quality components, and optimized system design. The scroll refrigeration system is also a simple system process in the industry. The heat pump unit cancels the one-way valve and adopts the unique bidirectional expansion valve throttling technology, which makes the system process greatly simplify. That is, the system resistance is reduced, the performance is improved, and the hidden danger of leakage is reduced, and the unit runs stably and reliably. The evaporator adopts internal thread type high-efficiency heat exchange copper tube or coil evaporator. The outer surface of the copper tube is spirally smooth and the baffle plate on the water side adopts a non-short circuit design, which improves the heat exchange efficiency of chilled water mixing. The main control equipment of the unit adopts a special microcomputer controller. Parameter setting, query is convenient, and operation is simple. Unit operation, energy regulation and self-protection. Automatic monitoring, after receiving the goods, only need to connect the water system and power supply and can be used.

Many companies use chillers, but they don't know how to choose them. When you chose a industrial chiller, we need to consider the working conditions, the installation, and the cost. Now we are talking about the cost for the air cooled chiller and water cooled chiller system.

The total cost for an air-cooled chiller system and a water-cooled chiller system can vary depending on several factors, including the capacity of the chiller, the complexity of the installation, and the specific requirements of the site. Here are some cost considerations for each type of chiller system:

Air-Cooled Chiller System:

Chiller Unit: The cost of the air-cooled chiller unit itself can vary based on the cooling capacity and efficiency rating. Higher-capacity or more energy-efficient units tend to have higher costs.

Installation: The cost of installing an air-cooled chiller system is often lower compared to water-cooled systems because there is no need for a cooling tower, water pumps, or associated water piping.

Electrical Requirements: Consider the electrical infrastructure needed to support the chiller unit, including electrical panels, wiring, and any necessary upgrades. This cost will depend on the site's existing electrical capacity.

Maintenance: Factor in ongoing maintenance costs for the chiller, such as regular inspections, filter replacement, and cleaning of the unit's condenser coils.

Water-Cooled Chiller System:

Chiller Unit: Water-cooled chiller units typically have a higher initial cost compared to air-cooled units, primarily due to the additional components required, like a cooling tower, water pumps, and water piping.

Cooling Tower: Consider the cost of the cooling tower, which is used to dissipate heat from the chiller system. The size and complexity of the cooling tower will impact the cost.

Water Pumps and Piping: Factor in the cost of water pumps and associated piping to circulate water between the chiller, cooling tower, and other components.

Chilled Water System: If the site doesn't have an existing chilled water system, additional costs may be incurred to install distribution piping and terminal units (such as air handling units or fan coil units) for delivering chilled water to the desired areas.

Water Treatment: Water-cooled systems typically require water treatment to prevent scale, corrosion, and biological growth. Consider the cost of water treatment equipment and ongoing maintenance.

In short, when choosing an air-cooled chiller and a water-cooled chiller, we need to consider comprehensively. We can contact the chiller manufacturer. They have professional refrigeration engineers who can provide professional advice for our industrial cooling water system. We choose the right chiller system.

Water Chillers have various applications in the production of the plastic industry. Some of the key applications include:

Cooling injection molding machines: In the injection molding process, high-temperature plastic materials need to be cooled and solidified to obtain the desired shape and properties. Industrial chillers can control the temperature of the injection molding machine by circulating cooling water, ensuring rapid cooling of the plastic and improving production efficiency and product quality. How to equip an injection molding machine with a chiller, please contact our sales to get a solution.oumal@oumal.com

Cooling extrusion machines: In plastic extrusion processes, high-temperature plastic pellets are extruded through an extrusion head to form shapes. During extrusion, the plastic needs to be cooled to maintain product appearance and dimensional stability. Industrial chillers provide cooling water to lower the temperature of the plastic, meeting the requirements of the extrusion process.

Cooling molds: In plastic injection molding, molds need to be cooled to facilitate demolding and rapid solidification of the plastic. Chillers can circulate cooling water into the mold to reduce mold temperature, ensuring quick solidification of the plastic, thus improving production efficiency and product quality.

Cooling plastic processing equipment: During plastic processing, equipment such as extruders, blow molding machines, and vacuum forming machines generate a significant amount of heat. Industrial chillers can use cooling water to lower the temperature, preventing equipment overheating, and improving equipment stability and lifespan.

Controlling plastic forming temperature: Different plastic materials require specific temperature ranges for molding to ensure product quality. Industrial chillers can control the molding temperature by providing cooling circulation, catering to the requirements of different plastic materials.

In summary, the applications of chillers in plastic industry production primarily revolve around temperature control and regulation during the plastic processing stage, aiming to enhance production efficiency, product quality, and equipment stability. The Air cooled chiller is widely used in the plastic industry. Also if the cooling water flow is big, we can use an air cooled screw chiller or water cooled screw chiller. When many machines need to be cool, but we use one central chiller to supply cooling water, the screw chiller is a good choice. We will help to make the best solution for your cooling water system. Contact us to chose your right chiller. WhatsApp: +86 15112554736.

More dust and poor water quality in the chiller environment will affect the normal operation of the equipment, and even lead to downtime. In order to increase the operating power of the chiller, it is necessary to create high-quality conditions for use and effectively maintain the operating power of the air-cooled chiller.

When using the chiller, if there is a lot of dust and other problems in the environment during the operation of the equipment, the normal operation of the equipment will be affected after the equipment enters the water-cooled chiller. In order to prevent the chiller equipment from being affected by dust in the environment and a large amount of scale due to long-term lack of maintenance, companies need to conduct professional inspections on chillers on a regular basis.

A layer of solid or ooze builds up, called fouling, which adds additional fouling thermal and flow resistance, increasing required heat transfer area, power consumption and maintenance cleaning costs. Due to the large number and wide range of heat exchangers, the fouling of heat exchangers has a great impact on one-time investment, metal material consumption and energy consumption. In today's emphasis on energy saving and emission reduction, it is particularly important to minimize the impact of dirt.

During the operation of the water-cooled screw chiller, on the water side of the heat exchange equipment, especially in the condenser of the open circulating cooling water system, there are slightly water-soluble or water-insoluble minerals, such as calcium carbonate, calcium sulfate, silicic acid Calcium, iron oxide, phosphate, etc. Adhering to the inner surface of the heat transfer tube to form scale; dust, silt, algae, microbial communities and even leaves, weeds, etc. The sediment mixed into the water is deposited on the inner surface of the heat transfer tube, forming sludge. Fouling on the water side mainly includes scale and sludge. Fouling increases the heat transfer resistance of the heat transfer surface, directly affects the heat transfer effect, increases the condensation temperature or reduces the evaporation temperature, resulting in increased energy consumption and reduced cooling capacity of the refrigerator. The thickening of the scale layer reduces the cross-sectional area of the flow in the heat transfer tube, increases the water flow velocity and the roughness of the tube wall, leads to an increase in the flow resistance on the water side, and increases the power consumed by the pump.

The accumulation of dirt will also cause local corrosion or even perforation of the heat exchange surface, which seriously threatens the safe operation and service life of the water-cooled chiller. In the heat exchanger design of water-cooled chillers, the presence of dirt increases the heat transfer resistance, reduces the overall heat transfer coefficient of the heat transfer tube, and increases the energy consumption of the compressor. Therefore, it is necessary to compensate for the reduction of the overall heat transfer coefficient by increasing the heat transfer area to ensure sufficient heat transfer. The correct choice of fouling factor has a great influence on the cost, energy consumption and operation cost of heat exchange equipment. Unfortunately, despite ongoing scientific research on fouling, to date there is no generally accepted value for the fouling factor that can be accurately used in heat exchanger design.

In the design of heat exchangers, the choice of fouling factor is often based on experience rather than science. Based on operating experience with a particular system under the same or similar operating conditions, or based on measurement data obtained from actual equipment under the same operating conditions, or based on test data obtained from testing with prototype or model equipment in the laboratory, or using the recommendations of authoritative institutions It is reasonable to estimate the data.

In order to avoid similar failures of chillers, it is necessary to complete the treatment of water sources and environmental dust in time. It can provide a comfortable environment for the chiller, and pay attention to the maintenance of the chiller. Even if the enterprise runs the chiller for a long time without any rest time, the equipment can also maintain stable operating performance and truly achieve the goal of quickly reducing the space temperature.

A screw chiller, also known as a screw compressor chiller, is a type of water chiller utilized for cooling applications in various industries, including injection molding. The semi-hermetic screw compressor is the core components of a screw chiller.  It operates based on the principle of a rotary screw compressor, which is a positive displacement compressor. The screw compressor consists of two interlocking helical rotors that compress the refrigerant gas to raise its pressure and temperature.

According to different heat dissipation methods, screw chillers are divided into air-cooled screw chillers and water-cooled screw chillers. Under the same cooling capacity requirement, the purchase cost of water-cooled screw chillers is lower than that of air-cooled screw chillers. As far as chiller installation is concerned, air-cooled screw chillers are easier to install.

Here are some key features of a screw chiller:

Cooling capacity: Screw chillers are available in a wide range of cooling capacities to meet the specific requirements of injection molding machines. They can handle high cooling loads efficiently, making them suitable for industrial applications. Oumal screw water chiller cooling capacity from 100kw to 1000kw.

Air cooled screw chiller cooling capacity from 90kw to 600KW.

Energy efficiency: Screw chillers are known for their energy efficiency. They can achieve high cooling capacities while consuming relatively less electrical power compared to other types of chillers.

Temperature control: Screw chillers offer precise temperature control, allowing for stable and consistent cooling of the process water used in injection molding machines. This helps maintain the desired temperature for optimal molding conditions. Oumal screw chillers use Siemens PLC controller. Intelligent control, simple operation.

Reliability and durability: Screw chillers are robust and designed for continuous operation in demanding industrial environments. They are built with durable components and feature advanced control systems to ensure reliable and trouble-free performance.

Modular design: Many screw chillers have a modular design, which allows for easy scalability and flexibility. This means that multiple units can be combined to provide higher cooling capacity if needed, making them suitable for expanding operations or varying cooling requirements.

Advanced control options: Screw chillers often come with advanced control options, such as microprocessor-based controllers or touch screen interfaces. These controls provide intuitive operation, real-time monitoring, and the ability to set and adjust various parameters for optimal performance and energy savings.

Noise reduction: Screw chillers are designed with noise reduction features to minimize the operating noise levels. This is important in industrial settings where noise can be a concern.

Overall, screw chillers offer efficient and reliable cooling solutions for injection molding machines, helping to maintain consistent process temperatures and optimize the production of high-quality plastic parts.