Water Chiller Chilled Water Cooled Chiller Water Cooled Chiller Manufacturers Water Cooled Chiller Molding Machine
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The difference between Air-cooled chiller and Water-cooled chiller
An air-cooled chiller refers to a chiller system that uses the ambient air surrounding the condensing unit to cool and condense the refrigerant back into a liquid. In other words, the air cooled chillers use fans for chiller's refrigerant dissipate heat, but the water-cooled needs to install cooling tower for operation.Water-cooled chillers are more efficient with the disadvantage of having critical maintenance demands included water treatment, chiller condenser-tube cleaning, tower mechanical maintenance, and freeze protection.This system includes item below.
Water-cooled chiller
Cooling tower
Cooling pump
Insulated water storage tank
Internal circulating pump and External process circulating pump
Screw chiller i and heat extraction as it is vital to yield high quality products. This includes process such as plastic injection, plastic extruding, bottle blowing, film blowing and many other thermoplastic materials that need to be heated to their molten temperature and then be solidified through cooling water from industrial chiller.
Water-cooled screw chiller specification
Model
AGS-150WDH nominal cooling capacity kcal/h kw 539.4 input power kw 112.2 max running current A 255.7 power supply 3PH-380V-50HZ refrigerant type R22 type of control expansion valve compressor type semi-hermetic screw Power(kw) 56.1×2 start-up mode Y-△ capacity control 0-25-50-75-100 evaporator type shell and tube chilled fluid flow (m3/h) 92.8 pipe diameter (inch) 5 condenser type shell and tube cooling water flow (m3/h) 112 pipe diameter (inch) 5 safety protection compressor over temperature protection, over load protection, high and low pressure protection, flow switch protection, reversed and lacking phase protection, anti-freezing protection,fusible protection. dimension mm *750* net weight kg running weight kg
Water-cooled screw chiller featurers
Advantage of water cooling chiller
Benefits of an industrial water chiller
Water Chiller Chilled Water Cooled Chiller Water Cooled Chiller Manufacturers Water Cooled Chiller Molding Machine
The difference between Air-cooled chiller and Water-cooled chiller
An air-cooled chiller refers to a chiller system that uses the ambient air surrounding the condensing unit to cool and condense the refrigerant back into a liquid. In other words, the air cooled chillers use fans for chiller's refrigerant dissipate heat, but the water-cooled needs to install cooling tower for operation.Water-cooled chillers are more efficient with the disadvantage of having critical maintenance demands included water treatment, chiller condenser-tube cleaning, tower mechanical maintenance, and freeze protection.This system includes item below.
Water-cooled chiller
Cooling tower
Cooling pump
Insulated water storage tank
Internal circulating pump and External process circulating pump
Screw chiller i and heat extraction as it is vital to yield high quality products. This includes process such as plastic injection, plastic extruding, bottle blowing, film blowing and many other thermoplastic materials that need to be heated to their molten temperature and then be solidified through cooling water from industrial chiller.
Water-cooled screw chiller specification
Model
AGS-150WDH nominal cooling capacity kcal/h kw 539.4 input power kw 112.2 max running current A 255.7 power supply 3PH-380V-50HZ refrigerant type R22 type of control expansion valve compressor type semi-hermetic screw Power(kw) 56.1×2 start-up mode Y-△ capacity control 0-25-50-75-100 evaporator type shell and tube chilled fluid flow (m3/h) 92.8 pipe diameter (inch) 5 condenser type shell and tube cooling water flow (m3/h) 112 pipe diameter (inch) 5 safety protection compressor over temperature protection, over load protection, high and low pressure protection, flow switch protection, reversed and lacking phase protection, anti-freezing protection,fusible protection. dimension mm *750* net weight kg running weight kg
Water-cooled screw chiller featurers
Advantage of water cooling chiller
Benefits of an industrial water chiller
This guide has all information you’re looking for about screw chillers.
It covers everything, from components, working principles, features, classification criteria, and installation, just to mention a few.
Keep reading this guide to learn more.
Screw chillers are industrial types of cooling systems that use a screw-type of the compressor.
You will compress the refrigerant using the screw compressor as one of the processes leading to fluid chilling.
Screw chiller
Twin-screw compressor
Screw compressors have both female and male parts or rotors that rely on a timing gear to produce compression.
Apart from that, the male and female rotors also work in conjunction with one another to produce compression.
You will have the male rotor which connects directly to the motor which acts as the driving rotor.
On the other hand, the female driver will be the part that receives the driving action (it will be driven).
As the male and female rotors rotate, the volume within their grooves will decrease and compresses the refrigerant.
The refrigerant fluid will flow into the compressor through the inlet forcing the compressor to reduce the tooth space.
It will force the seal line of the scroll compressor to move in the discharge port direction as the compression continues.
Finally, the refrigerant will leave the compressor when the pressure is too high and the seal line is at the discharge point.
You can choose from the list of two types of scroll compressors to use in your screw chilling applications.
Here are the two types of screw compressors that you can choose from.
You can either choose to use the single screw compressor or the twin-screw compressor depending on your application requirements.
Here is a comparison between the two main types of screw compressors.
In the single screw compressor, you will find the main rotor and two gate rotors.
It uses the main rotor as the driving rotor in conjunction with the gate rotor thus producing a compression effect.
Twin-screw compressors have helical grooved twin rotors which help in producing the compression effect.
As the two helical grooved rotors mesh, it will force the refrigerant to compress and flow in the other direction.
Screw compressors are positive displacement machines that have various working chambers and parts.
Here are the main components of the screw chillers that you need to pay close attention to.
It comes complete with two main rotors which include the smaller male rotors and the bigger female rotors.
The female rotor has a connection to the prime mover which basically rotates the male rotor.
The suction valve is responsible for controlling the movement of the gases within the scroll compressors.
You can either use electrical power or pneumatic power to control the movement of gases.
This is the main source of power for the screw chillers that comes in various forms depending on the design.
It has varying power transmission systems that will vary depending on the design or the model of the screw compressor.
This is the part of the screw compressor that lubricates the moving parts and reduces the effects of friction.
It comprises the oil or lubricant tank, oil separators, and oil filters.
Well, among the different types of screw chillers, we have the air-cooled screw chiller and water-cooled screw chillers.
Air-cooled screw chiller
Water-cooled screw chiller
The working principles of the air-cooled and water-cooled screw chillers are similar and produce the same chilling effect.
Apart from that, they have the same components that help in the chilling of different equipment.
The main difference is the fact that air-cooled chillers use air as the main chilling agent and are often noisy.
On the other hand, water-cooled chillers use water as the main chilling agent and are often quiet.
You will also install the air-cooled chiller outside the building and the water-cooled chillers inside a mechanical room.
Successful operations of the screw chillers to produce a chilling effect require a combination of efforts from different components.
Here are the main components of the screw chillers that you ought to pay close attention to.
In this case, the main compressor is the screw compressor which is responsible for compressing the refrigerant and increasing pressure.
There are two types of screw compressors which include the single-screw compressor and twin-screw compressor.
This is the part of the screw chiller which will collect the heat that comes from the system.
It consists of different pipes that contain the liquid that delivers the hot water and heat from the system.
The condenser is responsible for eliminating the heat which the refrigerant collects from the evaporators in the screw chillers.
It has a system that increases the residence time of the refrigerant as it condenses the refrigerant to eliminate heat.
In the expansion valves, various components will assist in controlling the amount of refrigerant.
It will help in reducing the pressure of the refrigerant and supply it in various quantities towards the screw compressors.
You will use the control unit to configure, program, and even monitor every move that occurs within the screw chillers.
It has systems that allow you to connect to the screw chilling system even from a remote location.
You will depend on the lubrication system to lubricate the moving parts of the screw chillers to reduce the effects of friction.
It has different parts such as a lubrication tank, and filters that are capable of providing sufficient and clean oil.
You will have to set the screw chillers according to the right chilling specification that you need.
As soon as you press start on the machine, the refrigerant will move from the refrigerant cylinder to the compressor.
In the screw chillers, we have screw compressors which are responsible for the compression of the refrigerant.
It will compress the refrigerant and increase the pressure as well as the speed of movement.
With that velocity, the refrigerant will flow from the compressor through pipes and delivery systems straight to the evaporator.
While in the evaporator, the refrigerant will collect the heat that comes from the system your intent to cool down,
The evaporator has a series of pipes that will deliver the heat from the system in pipes that contain flowing water.
The refrigerant will collect the heat from the water and leave them cool while the refrigerant heats up changing into gas.
Loaded with enough heat and pressure, the refrigerant will flow from the evaporator all the way to the condenser.
While in the condenser, the refrigerant will encounter cool water or air which will eliminate the heat it holds.
At the same time, it will change form from the gas into a liquid after losing the heat through the condensation process.
The air or water will eliminate the heat and dispose of it properly as the liquid refrigerant moves to the expansion valve.
At the expansion valve, the liquid refrigerant will go through a process of pressure reduction.
It will flow at a slower speed as the expansion valve delivers the liquid refrigerant in bits back to the compressor.
You can locate the screw chillers at any part of the production facility depending on the type of screw chiller.
Water-cooled screw chillers are best located in a mechanical room away from the weather elements that can cause damages.
On the other hand, you will locate the air chillers outside the production facility where it has proper access to enough air.
It is also a very strong machine that can withstand the weather elements and survive for a very long time.
It also produces a lot of noise thus locating it outside in an open space will help in reducing noise irritation.
You can also locate the air-cooled screw chillers in a mechanical room with plenty of ventilation to provide enough air.
Screw chillers have particular quality specifications that assure you of very high-quality, safe, and durable screw chiller machines.
You must ensure that your screw chillers adhere to all the quality specifications such as:
You can use the screw chillers in different types of industrial applications to cool different types of equipment.
Here are some of the industrial applications where the screw chillers come in handy.
You can use screw chillers in the construction industry to cool different types of equipment.
For instance, you can use the screw chillers to change concrete molecular structures or supply chilled water for mixing concrete.
You can also use the screw chillers in the food and beverage industry for several chilling functions.
It will help in cooling food faster before you fill the food in different packages for storage or subsequent distribution.
You can use screw chillers in big factories since they have higher chilling effects than other chillers such as scroll chillers.
It will come in handy in ink printing plants, chemical plants, and automobile factories to chill different types of applications.
Screw chiller regulate the temp of food industry
Screw chillers are one of the best types of chilling systems that you can use in the cooling of different machines.
Here are some of the advantages of using screw chillers in different cooling applications.
Screw chillers are smaller in size and will occupy less installation space in residential and commercial buildings.
They have smaller components that occupy less space thus making them smaller even though the effect is great.
You will also use the screw chillers to cool different equipment efficiently according to the capacity of the industrial application.
You have the freedom of customizing different sizes of screw chillers that can comfortably cool different building installations.
You will experience great energy efficiency by using screw chillers as they use very little energy to produce proper results.
They have proper control on the optimal levels of cooling and never go beyond specific cooling capacities thus conserving energy.
The main type of screw chiller is the water-cooled screw chiller which does not make a lot of noise.
In addition to that, you will house it inside a mechanical room which will help in absorbing the noise.
You will spend less time and money in the process of maintaining the screw chillers because it requires minimal maintenance.
Screw chillers have fewer parts that are very strong and durable that will take ages before they are up for maintenance.
Unfortunately, screw chillers have some limitations despite the numerous benefits that come with them.
Here are some of the limitations that you might experience using the screw chillers.
You will spend a lot on the purchase of the screw chillers as they are quite expensive and have high-quality materials.
The cost of manufacturing the scroll chillers is high because it uses very high-quality materials that are not cheap.
Since the scroll chillers are hermetic systems, you might go through a difficult time trying to repair them.
You will have to purchase original parts for performing repairs which are often quite expensive.
In addition to that, you will find a lot of difficulty in bringing the hermetic screw chillers apart.
You will have to hire professionals or install the clean-in-place system which is often costly to acquire.
Chillers have different types of compressors which help in the compression of different types of refrigerants.
Among the chiller compressors that you can choose from including the scroll compressors and the screw compressors.
A screw chiller is, therefore, a chiller that uses the screw compressor to compress the refrigerant and increase pressure.
On the other hand, scroll chillers use the scroll compressor to compress and increase the pressure of the refrigerants.
Scroll chiller
Different types of screw chillers come complete with common features which you must pay very close attention to.
Here are the main features that you will find in most of the screw chillers.
Screw chillers have various components such as unit compressors that have semi-closed screw compressors.
It also has electronically controlled components with heat exchangers and high-quality copper tube condensers and evaporators.
You must also ensure that it has security features that will help in keeping the machine as well as the operators safe.
Your screw chillers must also exhibit stable performance with very low noise and high levels of durability.
Most of them have very simple operations with an LCD on the control panel for proper programming and monitoring.
It has a very simple, beautiful, and open structure that you can easily install into the production facility.
You can also enjoy the flexibility of operating the screw chillers as you can change compressors accordingly.
Implying that you will have to program the machine and the screw compressors to function according to the product specifications.
When you are maintaining the screw chiller units, you need to focus purely on the main parts.
In the screw chiller compressor unit, we have for main parts including:
Since the screw chillers have very few parts, you don’t have to perform a lot of maintenance on the machine.
In that case, all you have to do is disassemble the parts and clean them very well to eliminate the debris.
The oil components have oil tanks and oil filter systems which you need to clean regularly.
Apart from that, you must also fill the tanks regularly and ensure that the reservoirs are up to the right limits,
In addition to that, you must maintain proper lubrication of the moving parts and replace the broken parts regularly.
Finally, you should treat the refrigerant and any fluids on the screw chillers to eliminate the possibility of fouling the system.
Screw compressor maintenance
Screw chillers and centrifugal chillers are types of chillers that you can use in different industrial applications to cool equipment.
Despite the similarity in function, screw chillers and centrifugal chillers differ when it comes to the type of compressor.
Screw chillers have screw compressors while the centrifugal chillers come complete with the centrifugal compressors.
Centrifugal chillers are the most efficient option that you can use when you intend to run the chiller at full load.
Centrifugal chiller
It uses centrifugal force which helps in the compression of the refrigerant to produce enough pressure and speed.
On the other hand, you will use the screw chillers to squeeze the refrigerant between two rotating helical screws.
Since we have different environmental and industrial aspects, you need to choose a screw chiller that will fit your operation requirements.
Are you interested in learning more about 50hz Water Cooled Screw Chiller? Contact us today to secure an expert consultation!
Here is a step-by-step process that you can follow to assist you in choosing the perfect screw chiller.
You must know the specific heat load you expect to be chilling using the screw chillers.
With this knowledge, you will be able to choose the right type and size of screw chillers to handle the whole process.
In this case, you will choose between the air-cooled screw chiller or the water-cooled screw chiller.
In other words, you will choose the coolant type that will provide you with the perfect flow rates to cool the target temperatures.
You must also have proper knowledge of the environment where you will install the screw chillers.
This information will help in getting the right size of screw chillers that you need and the accessories to fit.
At this point, you will look at the chiller as well as the pump performance curves among different models.
You should settle for the chillers that have the best types of chilling and pump performances to give the best results.
You will complete the process by selecting the best type of screw chiller to suit your application requirements.
Screw chiller coolant
You will purchase the screw chillers at various prices depending on the different types of screw chillers.
The prices vary due to the different sizes of the screw chillers in the market where larger screw chillers cost more.
Apart from that, you will also realize that the better the quality of screw chillers the higher the cost.
In some instances, the minimum order quantity also makes a difference in price as you might have a discount.
You will spend between and 50,000 US dollars to acquire a screw chiller depending on the type of screw chiller.
Well, there are a lot of improvements in terms of developing the screw chillers for better performance.
Here are some of the technological alternatives and trends that you should consider looking at.
In a bid to reduce the cost of energy, there are new technological advancements in the industry such as variable frequency drives.
As the cooling load decreases, the VFD will also reduce the energy output and increase when the cooling load increases.
Om that note, you will be able to save a lot of energy that could be even when the cooling load is low.
You can opt for gas-driven screw chillers especially in areas where the cost of power is very high.
Despite that alternative, you should use gas-driven screw chillers in areas where electric power is a problem.
You can replace the expansion valve using the 2-phase turbines in very large screw chiller applications.
This will help in maintaining the energy potential that is often lost with the use of an expansion valve.
You will also replace the small types of screw chillers with modern large-size screw chillers.
The large size of screw chillers will not only increase the capacity of the chiller but increase the overall efficiency.
Large size screw chiller
You should do a proper calculation to know just how long you will take by using the screw chiller.
In other words, you should know the durability of the screw chillers by calculating the life cycle cost considerations.
Here are the main factors that you should look at when calculating the life cycle cost of screw chillers.
Here, you will look at the final cost of purchasing and installing the screw chillers with costs such as electric bills.
You will look at the amount of money you will spend in paying for energy, treatment, and overall maintenance.
In this case, you will look at the amount of money you will spend in servicing and maintaining the screw chillers.
Well, the main difference between the screw chillers and the reciprocating chillers is the type of compressors.
Reciprocating chillers have reciprocating compressors while the screw chillers have the screw type of compressors.
Despite that difference, most of the factors such as working principles are similar for both types of chillers.
You can also have air- and water-cooled screws or reciprocating chillers for cooling different applications.
Reciprocating chiller
Screw chillers also work efficiently up to a point where it begins developing a few problems.
You can identify the issue affecting the machine through proper troubleshooting procedures.
Here are some of the problems that you might identify with the screw chillers.
High-pressure alarms go off when the pressure within the screw chillers is very high than usual.
Low-pressure alarms will also go off when the pressure within the screw chiller system is low.
You can sort this out through proper control of the pressure systems from the control panel.
You might also experience issues with very high temperatures within the compressor systems.
In such a case, you will activate the thermal protection module to help you in controlling the temperatures well.
At TopChiller, we design and manufacture a range of chiller systems such as air chillers and water chillers.
Contact us today for all your screw chiller needs.
A Screw Chiller is a type of cooling machine that is based on a screw-type compressor.
Its screw-based compressor comes with several innovative and unique features that make it preferable for many specific applications.
A Screw Chiller is a more efficient, less noisy, durable, and lightweight cooling device. It can perform efficiently under harsh environmental conditions.
Screw chiller manufactured by TopChiller
This is the major and most important component of a Screw Chiller. It is responsible for the pressure, flow rate, and speed of the refrigerant.
It performs the evaporation process by which it sucks all the heat content in an excessive amount.
This advanced microprocessor-based control unit is the heart of the Screw Chiller and controls everything in it. It has all the control options and features needed.
Although a Screw Chiller has all the sensors built-in, you can add an extra set of sensors if needed in the tank, compressor, or any other component.
A fluid level alarm system can be added to Screw Chiller, which will notify you when the fluid has reached a certain level. Like, the alarm will ring when fluid is too low or too high.
Its parts should have protective features, less erosion, and wear, be corrosion-resistant, high-grade compressor piston, and have less probability of failure.
All its rotating and moving parts are should be designed to move smoothly and quietly. It creates less noise and less vibration. This makes parts last longer without any kind of damage.
An ideal Screw Chiller can provide 25-30% more chilling efficiency. It is possible due to its screw-based compressor design.
It is the heart of a Screw Chiller that is consisted of a 5 to 6 screw-based compressor. This modern type of compressor is a highly efficient compressor.
Its highly innovative microprocessor-based Control Unit manages and controls all its functions automatically.
Its parts contain protective covers, sensors, lubrication, and other kinds of features for the protection of the components.
Screw chiller control Unit
There are several innovative features of the control unit of a Screw Chiller that makes it an advanced control unit. These features are given below.
The advanced operating feature is the most beneficial feature that is made to make your operation easy and simple.
The advanced PLC-based control unit of the Screw Chiller is the backbone of the advanced operating feature.
In this, your setting and programming of parameters are made easy and simple so that you can set your data precisely with ease.
This feature makes all the operations most accurate. It does not fluctuate to a very minor degree from the programmed parameters. This feature makes the process faster and safer.
The working mechanism resembles the working mechanism of other kinds of chillers. In a Screw Chiller, the cooling cycle begins by cooling of refrigerant.
Then refrigerant is sent to the compressor for pressure, and flow rate regulations.
From the compressor, it enters the refrigeration unit where it collects all the heat and finally in condenser it discards all the heat to maintain optimum chilling by the following process of condensation.
Finally, the whole cycle is repeated from time to time for continuous cooling.
The food industry and the central cooling system of big rooms are the two most unique applications of a Screw Chiller.
It is used for necessary temperature control during food processing, baking, etc. It is also used for post-production functions. These functions include storage, packaging, preservation, etc.
In large industrial plants, where a central cooling system is needed for the whole area or room, a Screw Chiller is utilized there. With its characteristics, it efficiently handles the central cooling of the big areas.
Screw chiller is used for food industry
In construction industries, its importance is related to the concrete processing and curing process.
Concrete is the most vital part without which a construction industry is incomplete and it is manufacturing includes a vital role of Screw Chiller.
When concrete is manufactured it needs constant curing of chilled water. A Screw Chiller provides this constant supply with an accurate set-point of temperature.
It is also used for temperature regulation during setting required hardness and strength of many construction industry products.
The low-temperature level is the range between -45 °C to -110 °C in which it operates.
It is the temperature range between -5 °C to -45 °C.
This is the highest range of temperature and it is between 5 °C to 15 °C.
Lubrication oil temperature is very crucial to keep it working properly. A temperature range lower than the optimum range will cause the lubricant to freeze and becomes dense.
This will increase the friction and heat of friction. The high temperature will cause the lubricant to become less dense and it will not able to tackle friction and perform other functions.
A temperature range from 19 to 22 °C is the optimum temperature range of lubrication oil of a Screw Chiller. It has built-in features that automatically manage this range of temperature.
In case of any fault, extract the lubrication oil and change it will the new one.
Lubrication protocol and the principle is a set of guidelines that must be followed to keep your lubrication oil and lubrication safe and efficient.
Industrial Chiller
Reciprocating industrial chiller
This cylindrical-shaped evaporator is simple to use and operate. The oil return value of the dry shell evaporator is much higher than other evaporators.
In this cold refrigerant is passed through heat exchanger tubes. On passing through tubes it collects heat and evaporates.
In this refrigerant is sprayed on the heat exchanger to form a film. This film refrigerant gets evaporated and desired heat collection is achieved.
A screw compressor is mainly made of rotor, screws, air filters, suction valves, rotation bearings, motor, and discharge valve. Rotors are moving high-speed cylindrical rollers.
These are the most important parts and are responsible for creating the required pressure. Air filters are used to filter the oil and air so that it does not cause any kind of damage to the compressor.
Suction valves are used to create suction and discharge valves are used to release the pressure.
A screw compressor works by sucking the air into it and compressing it to a small volume. As a result of this compression, changes happen in the pressure and temperature of refrigerants.
It works either by reciprocating piston mechanism or rotating screw mechanism. A Screw Chiller generally follows a rotating screw mechanism.
A screw compressor is composed of two screws called make rotor and female rotor. These two screws move at different speeds in opposite directions to each other to create pressure differences.
Water cooled screw chiller designed by TopChiller
Following facts and tips can help you to make a selection between these two.
Following are the major factors and features that you should take into consideration while selecting a Screw Chiller for your industry.
Water cooled screw chiller
The efficient energy control mechanism is one of the most unique and beneficial features of the Screw Chiller.
This mechanism is based on a four-stage capacity control mechanism of 25%, 50%, 75%, and 100%. This mechanism works by two methods.
First, you can program the required set of capacity so that enough energy is provided and it saves your energy from being overused or leaked.
Secondly, it has an automatic load switching mechanism. You can set direction and it will switch to one of the four capacities automatically according to the needs of the process.
Both of the methods are very energy efficient and save a huge amount of your energy expenses.
The multi-level protection feature is a set of advanced features described below.
Ease of installation is one of its major features. You can easily install it on your own by following simple guidelines given by the manufacturers.
All the parts are already assembled and you just need to unpack them and join them according to the guidelines. After joining parts, filling the tank is easy too.
Just fill it to the optimum level prescribed. Connect to a power source and start it. programming parameters on the control unit is very easy and you can do it in a short time.
Sizing of a Screw Chiller can be done on the following considerations.
Based on the above three factors, one can properly size the Screw Chiller for the industry.
Applying layers of lubrication oil on components, joints, etc of the Screw Chiller will reduce the friction produced. It will help to keep it long-lasting and healthy.
Lubrication oil makes movements of the components smooth and easy. On the whole, it makes the process faster and quiet.
It helps in covering small leakages in the surfaces of components.
Screw chiller oil system parts
This is petroleum-based lubrication oil. It is extracted as the byproduct of the petroleum refining process.
It has the same composition as mineral or natural oil. It is made synthetically for the lubrication in Screw Chiller. Is available in many varieties suitable for different compressors.
The two most common types of artificial oil are Polyester Oil and Polyether Oil.
The four load capacities are t 25%, 50%, 75%, and 100%. 25% load capacity is generally used at the start of the process.
It is used to give starting load to the Screw Chiller so that it can be prepared for further process. at 50% and 75%, the solenoid valve system is activated and high-temperature oil is entered into the system.
It is the optimum range of load used. At 100% load capacity, the Screw Chiller is at high risk. If operated at this for a long time, it may face a huge failure.
The major difference is that they both use different kinds of compressors. A Scroll Chiller uses a scroll-type compressor, while a Screw Chiller uses a screw-type compressor.
Secondly, there is a difference in performance efficiency. Generally, the Screw Chiller is 20 to 25% more efficient than the Scroll Chiller.
A Scroll Chiller follows a rotation-based scroll mechanism and a Screw Chiller follows a moving screw-based mechanism that creates suction and pressure.
Scroll chiller
Screw chiller maintenance
A low-pressure alarm is the notification alarm when the suction pressure of the screw compressor is very low.
This low level is below the safe limit and can cause a range of problems. Low suction pressure means a lower amount of air returned and it will cause efficiency to decrease.
When the pressure of discharge in s screw compressor is too high, it is called a high-pressure situation. This situation is notified by an alarm system.
Communication fault generally happens because of some kind of problem in the control unit line or the external device connected.
Due to excessive moister the communication line may get affected by an oxidation reaction and it stops working for a while. To solve this kind of problem, expert help is a must.
You can keep the communication line and circuit board protected by certain measures so that it can be safe from this kind of fault.
A proper monitoring practice is based on following guidelines.
Screw chiller monitoring
The first reason for the overheating of a compressor is friction between the shell and screws.
Originally screw compressor of a Screw Chiller is made highly frictionless but over time due to some problem, it might create friction that causes overheating.
You can solve this problem by simply replacing the compressor or repairing it. Secondly, when the electric resistance of the winding of the screws compressor crosses 141 kilo-ohms, it will cause overheating. Use windings with low electric resistance.
In case of delayed or improper maintenance, it might cause some level of exhaust pressure problem. Maintain it properly and regularly so that this problem never happens.
The inlet valves may get chocked or blocked sometimes and that results in an abnormality in exhaust pressure. Clean them regularly and check the valves properly before starting your Screw Chiller.
This problem might happen due to a faulty motor or any kind of sudden problem in the motor. Repair the motor and always use the high-quality motor in Screw Chiller.
Screw chiller inlet valve
Following are the major problems and their solutions regarding unusual vibrations in a Screw Chiller.
These loosened parts may create unusual vibrations and unbearable sounds when running. Tight the joints and nuts to get rid of this problem.
When the flow rate is too high or contains fluctuation it creates vibration in pipes, condenser, and other units. Set your flow rate to an optimum value.
It can be because of the improper setting of pressure parameters or the pump pressure switch. Correct the setting and start again.
It can happen when the compressor sucks excessive moist air, or too cooled refrigerant into it. Improper setting of expansion valves may also cause this problem.
Inspect the valves and refrigerant temperature to maintain it optimum. Install your Screw Chiller under optimum environmental conditions.
Screw chiller troubleshooting
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