Air Cooled Screw Chiller System Manufacturer | Geson Chiller
This is a list of the most frequently asked questions.
About air-cooled screw chillers.
Geson Chiller is one of the top Air Cooled Screw Chiller System Manufacturers in China.
So you can get more information to help guide your buying decision.
How Do Air Cooled Screw Chillers Work?
Air cooled screw chillers are one of two types of chillers that are used for commercial and industrial purposes. The other one is the water cooled screw chiller. This type of chiller works by processing air from an ambient source and then removing unwanted heat. It does not require the use of water to dissipate heat.
The heat is dumped onto a secondary condense loop before it is pushed into a cooling tower. This process results in the system losing water. Nonetheless, this step is omitted when dealing with an air cooled chiller. The fact that it does not involve the latent heat of evaporation, air cooled chillers lose their efficiency rating (as compared to water cooled chillers).
Air Cooled Screw Chiller
What the cooling Capacity of the Air Cooled Screw Compressor Chiller?
Under normal circumstances, in Geson Chiller, the Screw compressor chiller cooling capacity ranges from 300 to 1400kW. That is between 80 and 400 cold tons
Most popular model are:
50 ton air cooled screw chiller
115 ton air-cooled screw chiller
1 ton chiller
2 ton chiller
3 ton water chiller
10 ton chiller
20 ton chiller
50 ton chiller
60 ton chiller
100 ton chiller
200 ton chiller
500 ton chiller
Where Can You Find Them In Use?
Air cooled screw chillers are commonly used in newer buildings, particularly in small and medium-rise buildings. They are commonly seen in exhibition halls, office blocks, and similar types of buildings.
Do Air Cooled Screw Chillers Need Cooling Towers?
No. Air cooled screw chillers do not need cooling towers, unlike water cooled ones. Instead, they provide cooling by dumping unwanted heat from the system and back into the atmospheric ambient air. This is one of the reasons why you need to plan strategically where the system will be installed in the building.
Water Cooling Tower
Where Are They Typically Installed?
Air cooled chillers are typically installed in an outside location. This is important in an air cooled system because any unwated heat that is processed will have to be emitted in an outdoor space. For most buildings that install this type of chiller system, they are placed on the roof of the building.
Other times, they are also installed in the ground floor or in car parks. This is very common in small to medium-sized buildings.
What Is The Air Cooled Screw Chiller Working Principle?
There are several parts that make up an air-cooled screw chiller.
These components are as follows: chiller pump, main pump, fan coil units, and risers.
Air Cooled Screw Chiller Working Principle is as follows:
The main unit itself is what you will see installed on the roof of a building. There are chiller pumps attached to the main chiller unit. The chiller pumps are connected to small circulation pumps. These pumps are responsible for pushing water in and out and through the evaporator. Once cooled, the water is pushed back into the main pumps.
Air Cooled Screw Chiller Working Principle
In the Air Cooled Screw Chiller Working Principle. These pumps typically run one at a time. The chilled water will be pushed and circulated throughout the building via the fan coil units. The recirculating process would produce approximately 6 degrees Celsius in temperature. The next step of the process will see the chilled water go through the riser and then go back into the main chiller unit wherein it will go through the process all over again.
The entire cycle is repeated continuously to provide a sufficient amount of cooling to a building or large space over a given period of time. This process will only stop until the entire system is switched off.
How Efficient Are Air Cooled Screw Chillers?
In general, air-cooled screw chillers are less efficient than water-cooled ones. When buying this chiller system, you can determine its efficiency based on the EER value that is depicted in the percentage of the load based on certain conditions. The lack of cooling towers in air-cooled systems is partly responsible for it not being as efficient as water-cooled systems.
Air Cooled Chiller
What Are The Main Components Of Air Cooled Screw Chillers?
There are several components that make up air-cooled screw chillers. These components are as follows: condenser, expansion valve, compressor, evaporator, power panel, and control units. Below are the functions of each of these components:
- Condenser – This is where the heat is evaporated from the air before it is fed into the evaporator.
- Expansion valve – This is responsible for lowering the pressure of the refrigerant and amplifying its volume.
- Compressor – It helps to develop the pressure needed in order to circulate the refrigerant throughout the system.
- Evaporator – This is where unwanted heat from the structure is processed before it is fed into the cooling tower (for water-cooled chiller) or processed further (for air-cooled chillers).
- Power Panel – This is where the entire system can be switched on or off.
- Control Units – This is where the entire function of the chiller system is controlled or shut off.
Air Cooled Chiller Parts
What Are The Condenser Cooling Fans For?
The condenser cooling fans are located at the top of the air cooled chiller unit itself. These cooling fans will rotate once the system is powered on. The fans work in order to suck in the ambient air from outside of the building. Once the ambient air is sucked in, they will be pulled into the system through the grills on the fans.
From there, it will pass through the holes and wheels.
This process draws more air in and then introduced it into the pipes where it releases heat from the refrigerant.
Air Chiller Super Fan
What Type Of Compressor Is Used In Air Cooled Screw Chiller?
The air cooled chiller uses a screw type compressor. This component is the driving force that will generate pressure and move the refrigerant through the system. The compressor pushes the refrigerant through the tubes that form the system. These tubes serve as passage for the refrigerant before it is feed off into the condenser.
Once the refrigerant passes through the compressor, it does so while in a vapor state with high pressure and high temperature.
What Is The Expansion Valve For?
The expansion valve is one of the key components that make up an air cooled screw chiller. Once the refrigerant reaches this point, it is already a high pressure and medium temperature saturated liquid. It will be responsible for feeding off the refrigerant onto the next part of the system – the evaporator.
What Is The Evaporator For?
The evaporator is the tank-like structure that is part of the chiller unit. Once the refrigerant is processed at the expansion valve, it goes to the evaporator. This part is where the return water that has already been chilled makes its way back. By this time, however, the water is already much cooler than when it entered the system.
Air Chiller System
This chilled refrigerant will then be introduced back into the fan coil units and make its way back into the building to provide a cooling effect. The water will run opposite the refrigerant and this is where the heat transfer happens. The water is now a low pressure and low temperature liquid vapor. The unwanted heat is exhausted back into the outside of the unit and the building.
The refrigerant will pass through the evaporator and into the compressor again to start a new cycle. The refrigerant will never exit the system. It is a closed system so what it does is simply move around the different components.
How Do Chillers And Cooling Towers Work Together?
The cooling towers play an important role in the chiller system. This is where the heat exchange takes place once air is processed on the system. The cooling towers are placed on a roof of a building. It facilitates the entry of ambient air into the coil wherein heat is removed and then exhausted to the outside.
These two work closely together in order to generate chilled air that can create a cooling effect in large spaces such as buildings. However, cooling towers are not needed when using ambient air for creating a chilling effect. This is only necessary for water cooled screw chillers.
Air Chiller Fan
How Does An Air Cooled Condenser Work?
An air cooled condenser is an important component of air cooled water chillers. It is a direct dry cooling system that is made up of air-cooled finned tubes. This is where steam is condensed. The steam that is processed in the turbine uses low pressure, which enables the air cooled condenser to function like a vacuum. It also comes with an air excavation unit that removes non-condensable gas at a continuous basis.
The tubes are made up of a number of loops. The refrigerant will pass through those loops and by the time they leave this part of the chiller, it will turn to a medium temperature and saturated liquid.
Air Cooled Chiller Condenser
How Does Air Cooled Screw Chiller Differ From Water Cooled Chillers?
There are several differences between an air cooled screw chiller and water cooled one. However, the main concept is similarly for both of these systems. As the name implies, air cooled systems use air in order to fuel the condenser cooling while the other relies on a water source.
Both types of chiller require basic maintenance to ensure that the system operates optimally. Air cooled chillers require less maintenance, though, as compared to the water cooled units. In terms of components, air cooled systems do not need cooling towers or water pumps.
In addition, air cooled chillers consume up to 10% more power to operate than the water cooled ones.
Air Chiller Vs Water Chiller
What Are The Types Of Air Cooled Chillers?
There are two types of air cooled screw chillers that are available in the market: stationary and portable chillers.
The stationary air cooled chillers are those that are used whenever there is no issue of excess heat. Meanwhile, portable air cooled chillers serve the same purpose as the stationary ones but they are designed for portability so you can use them wherever you need them.
What Makes Air Cooled Chillers Effective?
Air cooled screw chillers absorb heat from the processed water. Once the heat from the water is processed, it releases that heated vapor to the outside of the unit. It is effective and efficient under certain conditions.
For example, the heated air that dissipates from the chiller unit can be used to warm a space during the winter months. It offers a more efficient way to heat any given space instead of utilize another form of heating system. In other cases, the chiller unit must be placed outside so that the heat won’t affect the desired cooling temperature of the building.
Air-cooled Air Chiller
What is the Air Cooled Screw Chiller COP?
COP (Coefficient Of Performance), the conversion ratio between energy and heat, referred to as the energy efficiency ratio.
The COP of a chiller refers to the ratio of the cooling capacity of the compressor to the electric power consumed. The COP of air-cooled and water-cooled is different and is related to the form of refrigerant (screw type, centrifugal type)
For air-cooled or evaporative-cooled screw chillers, the coefficient of performance (COP) requirements are as follows:
When the rated cooling capacity is less than or equal to 50KW, the COP should not be less than 2.60;
when the rated cooling capacity is greater than 5OKW, the cOP should not be less than 2.80;
How Does Air Cooled Chiller Operate?
An air cooled screw chiller operates using the control unit and the power control. Once the system is switched on, the different components work together in order to start the cooling cycle. It requires the use of a refrigerant that is processed within the system in a continuous cycle for as long as the power is switched on.
Pls, check the air cooled screw chiller catalog to get more data. Get the catalog from Geson Chiller.
What is Air Cooled Screw Chiller Hs Code?
Air Cooled Screw Chiller Hs Code is
Other refrigeration equipment
Need commodity inspection
Air Cooled Chiller Diagram
What Makes Air Cooled Screw Chiller Popular?
Air-cooled screw chillers are very popular because they take up less space compared to a water-cooled chiller. It is also easy to install whereas water-cooled chillers require experts to install them since they have more components involved.
Need more Air Cooled Chiller Catalogue, contact our engineer now.
Comparison of the air-cooled module system and air-cooled screw system
1. Introduction to the system
Both the air-cooled module system and the air-cooled screw system are composed of an outdoor air-cooled air conditioner.
Air conditioning terminal equipment (fan coils and air handling units, etc.) and water piping systems,
Air duct system, circulating water pump, etc.,
Chilled water is pumped to various air-conditioning terminal equipment in different areas through circulating water,
Send out hot and cold air through the terminal device and the air duct,
In order to adjust the indoor temperature, each fan coil can be independently controlled.
2. Common advantages
The air-cooled module system and the air-cooled screw system have the following common advantages:
1. Save investment:
Since the cooling and heating conversion and operating principles are the same,
They all use water as the refrigerant to transport cold and heat to the room,
Construction and equipment and materials costs are relatively low;
Both cooling and heating can use the same system,
No need for separate heating facilities, saving initial investment.
2. Widely used:
Especially suitable for villas, hotels, hospitals, office buildings, entertainment venues, restaurants, supermarkets and other air-conditioned occasions.
3. Flexible layout:
Different types of indoor units can be selected to meet the indoor requirements of different decoration styles;
When the decoration pattern changes,
Air conditioning can be configured according to different decoration pattern changes.
3. Comparison of the two systems
The above are the similarities between the air-cooled module system and the air-cooled screw system.
The performance, technology, and economy of the above two air-conditioning systems are analyzed and compared below.
- The air-cooled screw unit adopts a screw compressor,
The single compressor has a large cooling capacity and high manufacturing precision,
There are few moving parts and the failure rate is extremely low.
The compressor has strong resistance to liquid shock and allows a certain amount of wet stroke.
A single compressor can be steplessly adjusted within the range of 25%-100%,
Energy efficiency is relatively high (usually around 3.1),
Operating costs are lower.
The initial investment of the air-cooled screw unit cost is relatively high.
- The air-cooled modular unit adopts a scroll compressor,
The cooling capacity of a single compressor is small,
When the cooling load demand is large, it can be realized by combining multiple modules.
Once liquid shock occurs, the compressor will be burned out.
The scroll compressor can only adjust the energy input by starting and stopping,
Multi-level adjustment can be realized when multiple modules are combined.
Energy efficiency is relatively low (usually around 2.9),
The operating cost is higher, but the initial investment is less.
In order to show the difference between the two more intuitively,
Take the total cooling capacity of 700KW as an example,
Compare from all aspects.
The following table is a comparison of the basic parameters, initial investment, operating costs, and operating reliability of the two programs:
||Air-cooled Modular Chiller
||Air-cooled Screw Chiller
|Basic parameters System
||5 sets of 130kw modular chiller
and 1 set of 65kw modular chiller combination
|2 sets of 350kw air-cooled screw unit
||The operating cost of an air-cooled screw is lower
||The Equipment cost
||Higher，the main engine with the same cooling capacity is 20-30% more expensive than the module machine.
||The initial investment of the air-cooled screw is higher.
|Chiller room and basic requirements
||No need for a special computer room,
small weight, scattered layout, large floor space, about 150㎡
|No need for a special computer room,
small floor area, about 80-90㎡
|Air-cooled screw chiller occupies a small area and requires load-bearing Higher
||The number of units is large,
the pipeline is complicated, a
nd the module hydraulic balance needs to be considered.
The installation project cost is high.
|The number of units is small,
the installation is simple,
and the project cost is low.
|Air-cooled screw chiller installation cost is lower
||Microcomputer intelligent control,
no need to be on duty
|Microcomputer intelligent control,
no need to be on duty
|Air-cooled screw operating cost is lower
|Low operating cost
||Low partial load IPLV,
low graded energy adjustment accuracy
|High partial load energy efficiency,
high step energy adjustment accuracy
|Electric auxiliary heating
||Limited by the performance of the compressor,
the heating conditions will have a large attenuation when the ambient temperature is low. Generally, electric auxiliary heating is required.
|Low-temperature environment heating has less heat attenuation
and does not require an electric auxiliary heating
||The air-cooled scroll unit is composed of multiple refrigeration systems with small cooling capacity,
and the number of refrigeration accessories
such as compressors are large,
the number of solder joints is large,
the failure rate is high,
and the maintenance cost is high.
few solder joints, long life,
easy maintenance, low maintenance cost
|The air-cooled screw has low maintenance cost and longer service life
||Lifespan is about 10 years
||About 25 years
Air-cooled module systems are generally used in small and medium-sized commercial places with a cooling capacity of 20kW~400kW and an area less than 5000m2.
The air-cooled screw unit has a large capacity and is generally used in a cooling capacity greater than 300kW.
Used in medium and large commercial and industrial sites with an area greater than 5000m2.