What is a Chiller? What is a chiller and what are the types of chillers?

Chillers are actually air conditioning units. **Most air conditioners are like this, in order to be as big as the building, it is impossible to install evaporators everywhere, and use water to drive heat transfer.

Back to the topic of chillers.

The chiller has a condenser, an evaporator, a compressor and other auxiliary things, just like the air conditioner.

The condenser and evaporator of the air conditioner are both air-refrigerant heat exchangers, while the water-cooled unit is a liquid water-refrigerant heat exchanger.

That is to say, change his exchange medium from air to water, so that in the condenser, the water brings the heat to the cooling tower for cooling, and in the evaporator, the heat of the water is absorbed by the evaporation of the refrigerant in the evaporator, so as to cool down and achieve refrigeration.

Centrifugal chiller is the use of electricity as the power source, freon refrigerant evaporation in the evaporator to absorb the heat of the refrigerant water for refrigeration, evaporation and heat absorption of freon wet steam is compressed by the compressor into high temperature and high pressure gas, condensed by the water-cooled condenser into liquid, throttled through the expansion valve into the evaporator for recirculation. So as to produce 7 -12 chilled water for air conditioning at the end of the air conditioner.

A fully enclosed refrigeration compressor is used.

Working principle: The blades rotate at high speed, and the speed change generates pressure. It is a speed compressor.

Few moving parts, low failure rate and high reliability.

The coefficient of performance value is high, generally above. The 30-load operation can be infinitely adjustable, and the energy saving effect is more obvious.

The cooling capacity attenuation of centrifugal chiller is mainly caused by water quality: the condenser and evaporator of the unit are heat exchangers, such as the scale of the heat transfer pipe wall, the cooling capacity of the unit decreases, but the condenser and evaporator have been considered to be convenient for cleaning in the design process of the manufacturer, and the cooling capacity has little or no cooling attenuation with the long use time.

Electric refrigeration has a history of more than 100 years, mature technology and manufacturing process, easy to use and maintain, and has become a popular product for many users.

The average life of the centrifugal compressor is 75,000 hours, and the freon and oil of the unit have been added, and the user can use it when connected to water and electricity on site.

The unit does not need to be overhauled, only the water system needs to be cleaned, and the maintenance cost is low.

Screw chillers.

The chiller is designed with a screw compressor as the main engine, and the industrial screw chiller has mature technology and is widely used in chemical, pharmaceutical, food, refrigeration, engineering construction, etc., with a typical refrigeration capacity ranging from 700 to 1000kw.

Piston chillers.

Compared with the screw chiller, the piston chiller, the compressor is a piston movement mode, which is assembled by a refrigeration compressor and a condenser, evaporator, thermodynamic expansion valve, etc., and is a modular chiller.

A modular chiller consists of several modular chiller units connected in parallel with two completely independent refrigeration systems, each with a two- or single-speed compressor, evaporator, condenser and controller. It is equipped with a computer monitoring system to control the whole unit, and according to the size of the air conditioning load, the compressor will be started and stopped regularly or the high-speed operation will be changed to low-speed operation.

Centrifugal chillers.

However, its working principle is fundamentally different from that of a piston compressor, which does not use the reduction of cylinder volume to increase the pressure of the vapor, but relies on the change of kinetic energy to increase the pressure of the vapor.

Water source heat pump unit.

It is an equipment that uses water circulating in a common pipeline, water pumped from wells, lakes or rivers or water circulating in underground coils as a cold (heat) source to produce cold (hot) air or cold (hot) water; It includes a use-side heat exchange equipment, compressor, and heat source side heat exchange equipment, with single refrigeration or refrigeration and heating functions.

A chiller is a type of equipment used for refrigeration, which is commonly used in industrial, commercial, and residential buildings. It lowers the indoor temperature by circulating the refrigerant to absorb heat and discharge it to the outside environment.

Types of chillers include:

1.Air-cooled chillers: Heat dissipation through air circulation, suitable for outdoor installation or indoor ventilation.

2.Water-cooled chillers: heat dissipation through water circulation, suitable for indoor installation or outdoor places with poor ventilation.

3.Screw chiller: It adopts screw compressor, which has the characteristics of high efficiency, low noise and good stability, and is suitable for large commercial and industrial buildings.

4.Scroll chiller: Scroll compressor, with high efficiency, low noise, energy saving and other characteristics, suitable for small and medium-sized commercial and industrial buildings.

5.Magnetic levitation chiller: using magnetic levitation compressor, it has the characteristics of high efficiency, low noise and energy saving, and is suitable for high-end commercial and industrial buildings.

You can learn about the temperature controlled chiller in the middle energy, and the quality is guaranteed!

Chillers. It consists of four main components: compressor and evaporator.

Condensers and expansion valves.

In order to achieve the cooling and heating effect of the unit, because it is widely used in all walks of life, the requirements for the chiller are not the same. In the refrigeration industry, it is divided into two types: air-cooled chillers and water-cooled chillers.

There are many forms of classification of chillers.

1) Classified by compressor form.

**There are three types of compressors used in air conditioners: piston type, screw type and centrifugal type, with piston compressors being the most.

2) Classified according to the cooling method of the condenser.

According to the condenser cooling method, it can be divided into three types: water-cooled, air-cooled and evaporative-cooled.

3) Classification according to the mode of energy utilization.

According to the energy utilization mode, it can be divided into single cooling type, heat pump type, hot type single cooling, ice storage double function type, etc., and the commonly used ** air conditioner is generally heat pump type.

4) Classified according to the sealing method.

According to the sealing method, it can be divided into three types: fully enclosed, semi-enclosed and open.

5) Different classifications according to energy compensation.

According to the energy compensation, it can be divided into two types: compression type and absorption type, compression type is the use of electricity compensation, and absorption type is the use of gas compensation. At present, almost all the air conditioners used in China are power compensated.

6) Classification by heat source.

In the absorption air conditioning system, it can be divided into three types: hot water pump, steam type and direct combustion type according to its different heat sources. The fuels used are diesel and kerosene.

Heavy oil and natural gas.

7) Press refrigerant.

Classify. **There are two types of refrigerants used in air conditioners: fluorine refrigerants (R22, R123 and R134A) and ammonia refrigerants, and R22 is currently the most used model.

8) Classified according to the temperature of the cold water effluent.

According to the temperature of the cold water outlet, it can be divided into more than 15 kinds.

Shandong Zhongke can Tan Junsheng answer for you.

A chiller is a mechanical device that refrigerates through the circulating flow of refrigerant, usually consisting of an evaporator, compressor, condenser, and control system, among others. Chillers can be divided into two types: air-cooled and water-cooled according to the refrigeration method.

Common types of chillers are:

1.Air-cooled chiller: The refrigeration effect is mainly achieved through the heat dissipation of the condenser by external air, and the whole system structure is simple.

2.Water-cooled chiller: It is mainly cooled by circulating water, and generally needs to be equipped with additional cooling towers, water pumps and other equipment, but it can improve the heat dissipation effect by more than 50%.

3.Screw chiller: Screw compressor is used to achieve higher refrigeration efficiency.

4.Centrifugal chiller: Centrifugal compressor is adopted, which can cope with large flow refrigeration loads and is suitable for medium and large buildings.

5.Cryogenic chiller: capable of producing refrigerated water at very low temperatures, mainly used in refrigeration lines and equipment.

The main uses of chillers include:

1.**Air conditioning refrigeration.

2.Industrial refrigeration.

3.Electronics manufacturing.

4.Medical instrument and equipment manufacturing.

5.Food and beverage processing.

6.Chemical manufacturing.

7.Oil and gas processing.

8.Automobile and shipbuilding.

9.Military and aerospace applications.

10.Planting and breeding field.

In a word, chiller is an important refrigeration equipment that is widely used in various fields.

The chiller compresses the refrigerant into a liquid state through the compressor and sends it to the evaporator for heat exchange with the chilled water, which is cooled by the chilled water, and the chilled water is sent to the cooling coil unit of each fan tuyere, which is blown by the fan to achieve the purpose of cooling. The evaporated refrigerant releases heat into a gaseous state in the condenser, and the cooling pump sends the cooling water to the cooling tower to be sprayed and cooled by the water tower fan, and the heat is exchanged with the atmosphere to dissipate the heat into the atmosphere.

When the chiller draws air from its surroundings, it also inhales non-condensable impurities. As a result, the purification unit separates these impurities from the refrigeration mechanism.

A chiller works very differently from an air conditioner in that it absorbs heat from the indoor area and releases it outside through pipes that deliver the pressurized liquid refrigerant. Chillers produce cold water vapor that ultimately cools equipment within a building through condensation on surfaces such as pipes and walls.

The purpose of a chiller is to provide a cold source (chilled water). The purpose of the special air conditioning unit is to adjust the ambient temperature through the cold water provided by the chiller. The chiller is to supply cold water to the fan coil unit (combined air conditioning unit, wall cabinet unit) and the end of the air conditioner.

An air conditioning unit can also be understood as a large fan coil unit, which belongs to a Chinese-style air conditioning system. It is the main equipment for air filtration and various heat and humidity treatments, so that the indoor air can reach a predetermined temperature, humidity and cleanliness, and maintain sufficient fresh air and comfort in the room. The air-conditioning unit is through R22 and other refrigerants, through the compressor work, heat exchange to produce 7-12 degrees of cold water to provide the end of the air-conditioning box for the use of equipment, there are two kinds of air cooling and water cooling.

The air conditioning unit is an air handling equipment assembled from various air handling functional sections. Impression memory 02 Yesterday at 20:36, the chiller is a kind of ** air conditioner.

The chiller first uses refrigerant (freon or other substitute products) to reduce the volume temperature, and then the low-temperature water is transported to the coil to cool the air, and then the cooled air (i.e., cold air) is sent to the space that needs to be cooled, such as workshops, laboratories, etc. The range of air conditioning units is larger than that of chillers, which are just one form of air conditioning, and there are other forms of air conditioning, such as cooling the air directly with freon, and then sending cold air into the room, and so on. Hope the above answers are helpful to you.

The purpose of the special air conditioning unit is to adjust the ambient temperature through the cold water provided by the chiller. The chiller is to supply cold water to the fan coil unit (combined air conditioning unit, wall cabinet unit) and the end of the air conditioner. An air conditioning unit can also be understood as a large fan coil unit, which belongs to a Chinese-style air conditioning system.

It is the main equipment for air filtration and various heat and humidity treatments, so that the indoor air can reach a predetermined temperature, humidity and cleanliness, and maintain sufficient fresh air and comfort in the room. The air-conditioning unit is through R22 and other refrigerants, through the compressor work, heat exchange to produce 7-12 degrees of cold water to provide the end of the air-conditioning box for the use of equipment, there are two kinds of air cooling and water cooling. The air conditioning unit is an air handling equipment assembled from various air handling functional sections.

Impression memory 02 Yesterday at 20:36, the chiller is a kind of ** air conditioner. The chiller first uses refrigerant (freon or other substitute products) to reduce the volume temperature, and then the low-temperature water is transported to the coil to cool the air, and then the cooled air (i.e., cold air) is sent to the space that needs to be cooled, such as workshops, laboratories, etc.

The range of air conditioning units is larger than that of chillers, which are just one form of air conditioning, and there are other forms of air conditioning, such as cooling the air directly with freon, and then sending cold air into the room, and so on. Hope the above answers are helpful to you.

Dear, remember to wear a mask when you go out, pay attention to protection, and protect yourself, here the teacher wishes you a happy life.

Air cooling and water cooling are different in the following ways:

1. Temperature and pressure.

1. The condensing temperature and condensing pressure of the air-cooled chiller depend on the outdoor drybulb temperature.

2. The condensing temperature and condensing pressure of the water-cooled chiller depend on the outlet temperature of the cooling tower.

Second, the comparison of thermal work.

1. The condenser of the air-cooled chiller is to exchange heat with the air, and the heat storage and thermal conductivity of the air are much smaller than that of water.

2. The refrigeration capacity of the air-cooled unit is much lower than that of the water-cooled unit.

Advantages and disadvantages of air cooling and water cooling:

1. Air cooling. 1. Advantages.

A multi-purpose machine, which can not only provide indoor refrigeration and heat conditioning, but also can be free from climate change all-weather domestic hot water, which not only saves the investment and operation costs of hot water boilers, but also avoids the dependence of solar water heaters on the climate.

2. Disadvantages. The total power of the motor of the air-cooled unit is large, and the electricity consumption is relatively large.

2. Water cooling. 1. Advantages.

By reducing the number of fans, the vibration and noise generated by the fans are also reduced. The heat dissipation effect is much higher than that of air cooling systems.

2. Disadvantages. The equipment required for a water-cooled radiator is very large and compatible, taking up a certain amount of space. The price is higher than that of an air-cooled system.