What are the classifications of screw chillers?

Kedley chiller technology for you is as follows:

Screw chillers can be divided into two types: water-cooled screw chillers and air-cooled screw chillers according to different heat dissipation methods.

The water-cooled screw chiller is mainly composed of compressor, evaporator, condenser, refrigeration accessories, electronic control system, etc. When an enterprise purchases a water-cooled screw chiller for installation, it must purchase additional auxiliary equipment for heat exchange to provide the circulating cooling water required by the water-cooled screw chiller. Ancillary equipment includes:

Cooling water tower, circulating water pump, double-layer stainless steel insulated water tank.

The configuration of the air-cooled screw chiller is the same as that of the water-cooled screw chiller, but the condenser type is different. It uses a fan to dissipate heat, so a finned condenser is used to continuously exchange heat with the air. Therefore, air-cooled screw chillers do not need cooling towers, but do require circulating water pumps and double-layer stainless steel insulated water tanks.

Screw chillers are divided into industrial screw chillers, medium temperature screw chillers, and low temperature screw chillers according to the water supply temperature range.

1. Industrial screw chiller.

It can provide 5 15 chilled water, or use ethylene glycol solution as the refrigerant, and can provide -5 +5 process chilled water solution, which can be used as ice cold storage, low temperature air supply, air conditioning and other process cold sources required by other production processes. At the same time, according to the user's requirements, we can carry out special design of the unit, and can provide a chiller with a large temperature difference (the temperature difference between the inlet and outlet water is 8 15). or higher outlet water temperature unit (outlet temperature 15 25).

The cooling capacity is 94kw-3360kw.

2. Medium temperature screw chiller.

The outlet temperature is -5 -45, and the imported semi-hermetic screw compressor unit (with economy) is adopted; Available in -5 -45 low-temperature glycol solution or saline. It can be used as a process cold source for chemicals, pharmaceuticals, cold storage, ice rinks and other processes. The cooling capacity is 55kw-2000kw.

3. Low-temperature screw chiller.

The outlet temperature is -45 -110, and -45 -110 alcohol or calcium chloride aqueous solution chilled water can be provided; Binary cascade or ternary cascade screw refrigeration system is adopted. High energy efficiency ratio, stable operation and other characteristics.

At the same time, it can be designed according to the requirements of use, ultra-low temperature type, anti-corrosion type, explosion-proof special industrial screw chiller, which can meet the requirements of various industries for process cold sources.

It is formally divided into single screw and twin screw; From the condenser heat dissipation is divided into air cooling and water cooling, from the evaporator is divided into circulating condensate and circulating refrigerant.

The brands of screw chillers are: Kangsai Refrigeration, Daikin, McQuay, Hitachi, Dunhambu, etc. Advantages of screw chiller::

The structure is simple, there are few moving parts, few wearing parts, only 1 10 of the piston type, the failure rate is low, and the life is long. The circular motion is stable, there is no "surge" phenomenon during low-load operation, the noise is low, and the vibration school is not the quality of Shanghai Kangsai refrigeration. 2014-08-04 by:

What are the well-known brands of 8 screw chillers in Shanghai Kangsai Refrigeration Answer: Screw chillers, the cooling on the injection molding machine of our factory is a twin-screw chiller of Kaideli. I bought it the year before last.

At present, it is okay, there is no problem, for your reference, I hope you can be satisfied, give more points. 2015-07-09 Author: Know which brands of 15 screw chillers are better?

Answer: Suzhou Ansjer Machinery Co., Ltd. has been engaged in temperature control system engineering for more than 10 years. Strict quality control system is the consistent tradition of Suzhou Ansjer Machinery, each chiller has undergone strict quality inspection before leaving the factory, including negative chiller performance and materials and other tests to ensure the quality of Ansjer products.

For better service. 2018-08-01 Author: qads answer 3 2 What are the brands of water-cooled screw chillers?

The brands of water-cooled screw chillers are: Kangsai Refrigeration, Daikin, McQuay, Hitachi, Dunhambu, etc. Advantages of water-cooled screw chiller:

The structure is simple, the moving parts are few, the wearing parts are few, only the piston type 1 10, the failure rate is low, and the life is long. The circular motion is stable, there is no "surge" phenomenon during low-load operation, low noise, vibration and Shanghai Kangsai system. 2014-08-04 by:

What are the 6 brands of screw chillers in Shanghai Kangsai Refrigeration Answer: Screw chillers, generally large machines only use screw type. If you have used a Kaideli refrigerator, Foxconn's Shenzhen factory, you have been here for five or six years, and you want to change jobs, or do this kind of equipment or other equipment management.

Hope you can solve the problem

What are the brands of screw chillers? You can choose the big brand, the beautiful brand or the Qinyuan spring brand is better, and the quality is better, and the leakage can turn your cold water into a unit, which is better.

Applications of Screw Chillers:

The power of the screw chiller is relatively greater than that of the scroll type, and it is mainly used in the first air conditioning system. Chemical industry. Textile. Foodstuff. Pharmaceutical. Chemical fiber and other large-scale industrial refrigeration.

Classification of screw chillers:

Screw chillers can be divided into two types: water-cooled screw chillers and air-cooled screw chillers according to different heat dissipation methods.

Key points for the selection of screw chiller:

Key points for product selection.

1.The main control parameters of the screw chiller are the refrigeration performance factor, rated refrigeration capacity, input power and refrigerant type.

2.The selection of chillers should be considered according to the cooling load and use. For the refrigeration system with a long working time under low-load operating conditions, it is advisable to choose a multi-head active stove as a plug compressor unit or a screw compressor unit, which is convenient for adjustment and energy saving.

3.When selecting chillers, priority should be given to units with higher performance coefficient values. According to statistics, the general chiller runs at 100% load throughout the year, accounting for less than 1 4 of the total operating time.

The proportion of runtime for % load in total uptime is roughly1%。Therefore, when selecting chillers, priority should be given to models with relatively flat efficiency curves.

At the same time, the adjustment range of the chiller load should be considered when designing the cover for use. The multi-head screw chiller has excellent partial load performance and can be selected according to the actual situation.

4.When selecting a chiller, attention should be paid to the conditions of the nominal working condition. The actual cooling output of the chiller is related to the following factors:

a) cold water outlet temperature and flow;

b) The inlet temperature, flow rate and fouling coefficient of the cooling water.

5.When selecting a chiller, it should be noted that the normal working range of the unit is the current value of the shaft power under nominal working conditions.

6.In the design selection, it should be noted that the outlet temperature of the cold water should not exceed 15 under the nominal working condition flow, and the outdoor dry bulb temperature of the air-cooled unit should not exceed 43.

If it must exceed the above range, it should be understood whether the use range of the compressor is allowed and whether the power of the main motor is sufficient.

The brands of water-cooled screw chillers are: Consai Refrigeration, York, Carrier, Caddelity, Trane, etc. When the unit is cold in spring, the compressor sucks the low-temperature and low-pressure refrigerant in the evaporator into the cylinder, and the compressor does the work

The brands of screw chillers are: Kangsai Refrigeration, Daikin, McQuay, Ripai Yinli, Dunhan Chunsui Hall Cloth, etc. The advantages of screw chiller: simple structure, few moving parts, less wearing parts, only 1 10 piston type, failure rate.

I just know this question, let me answer it.

Classification of screw chiller: 1. According to the different classification of screw refrigeration compressors used, screw refrigeration compressors are divided into twin screw and single screw. Twin-screw refrigeration compressors have a pair of rotors with spiral teeth that gnaw at each other and rotate in opposite directions.

The single-screw refrigeration compressor has a rotor screw with 6 spiral grooves machined on an outer cylindrical surface. On the left and right sides of the butterfly and rod are the identical planetary gears with 11 racks mounted vertically. 2. According to its condensation mode, it is divided into water-cooled screw chiller and air-cooled screw chiller.

3. According to the sealing structure of the compressor, it can be divided into open type, semi-closed type and fully enclosed type. 4. According to the function of the air conditioner, it can be divided into single cooling type and heat pump type. 5. According to the different refrigerants, it can be divided into R134A and R22.

6. According to the structure of the evaporator, it can be divided into ordinary type and full liquid type.

Screw chillers can usually be divided into the following aspects:

1.Classification according to unit structure: screw chiller can be divided into several structural types such as single machine, double machine, and multi-machine group.

2.Classification according to refrigeration mode: Screw chiller can be divided into two types: air cooling (air cooling) and water cooling, and different refrigeration methods can be selected according to different use environments and requirements.

3.Classification according to the refrigeration capacity of sensitive eyes: screw chillers can be divided into different specifications and models according to the size of the refrigeration capacity, ranging from 10kW refrigeration capacity of small units to hundreds of kW refrigeration capacity of large units.

4.Classification according to performance parameters: Screw chillers can be classified according to different performance indicators, such as efficiency coefficient, cooling water temperature adjustment range, compressor power and control mode, etc.

5.Unit composition: Screw chiller is generally composed of screw compressor, condenser, control system, electrical system, expansion valve, evaporator, etc.

In short, the classification of Qiaoxu Sui screw chiller can be classified and composed from many aspects such as unit structure, refrigeration mode, refrigeration capacity, performance parameters and unit composition.

You can understand the screw chiller with medium energy temperature control, and the quality is guaranteed!

The screw chiller is named because its compressor is screw type, and the unit is divided into a single-head chiller and a double-head parallel chiller, the double-head parallel chiller has two compressors, and the single-head chiller is a separate refrigeration system, <>

Screw chiller is a chiller with various forms of screw compressor as the main engine. It is an assembled refrigeration unit composed of a screw refrigeration compressor, a condenser, an evaporator, a thermostatic expansion valve, an oil separator, and an automatic control element and instrument.

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Chiller selection, depending on the process, practical site, refrigeration capacity, temperature requirements, flow, understand these elements to know how to ** and plan, the general selection of chillers should be selected according to the heat size and control requirements of heating components.

1. The Kaideli screw chiller is also air-cooled, or water-cooled, the water-cooled chiller needs a machine room, and the air-cooled screw chiller can be placed outdoors to do waterproof 2. The energy efficiency of the air-cooled type is at least twice worse than that of the water-cooled screw chiller. 3.The main evaporator of the screw chiller is generally shell and tube, and the material shell is cast iron and copper tube heat exchanger I Kaideli screw chiller recommends that the customer's shell is made of stainless steel and copper pipe.

It is suitable to choose multi-head piston compressor unit or screw compressor unit, which is convenient for conditioning and energy saving, that is, we often say that double-head screw chiller, with the change of load, the screw chiller automatically determines the number of start-ups, and the compressor is in the best working condition, so as to effectively save electricity.

Screw chiller is a large-scale industrial refrigeration equipment. It is widely used in air conditioning and large-scale refrigeration industry. It plays an important role in refrigeration, cooling and cooling.

The working principle of water cycle is adopted to save water resources. Direct cooling of the equipment with cold water. The temperature of industrial equipment does not rise.

Constant equipment low temperature state.

The screw chiller is named the screw chiller because its key component, the compressor adopts the screw type. According to different heat dissipation methods, it can be divided into two types: water-cooled screw chiller and air-cooled screw chiller. The screw chiller has a cooling capacity ranging from Kcal H to Kcal H, and the compressor power can range from 8kw to 1280kw, which can be widely used in all walks of life with particularly large cooling capacity, with a total of 14 models to choose from.

First, before choosing, first understand the basic components of the screw chiller: 1. Compressor: The compressor is the core component of the entire refrigeration system and the power source of refrigerant compression. Its role is to convert the input electrical energy into mechanical energy, which will be systematized.

In the actual selection of chillers, it is difficult to obtain relatively complete data. According to our experience in planning and supporting sales for many years, t=200 is an average value of many commonly used products after years of statistics. If there is a hot rubber track attached to the mold, the energy of the hot rubber track should also be added to the calculation of cold capacity, generally the hot rubber track is in kw as the unit, and the unit should be converted into kcal h, 1kw = 860kcal h.

If the water supplied to the factory is sufficient, the temperature is low, and the cost is low, there is no need to use a screw chiller, which is generally not realistic, unless the factory can be near a large lake with relatively low water temperature; The other is to use the city's deep well water supply to meet the needs of temperature and flow, but it is often too costly. This method can be used for experimental setups, but for factories it is impractical.

Screw chiller.

Ice water temperature difference. The temperature of the cooling fluid (ice water) of the plastic mold is generally subject to great changes in the shape of the processing materials and products, such as polystyrene thin-walled beakers, and the temperature of the ice water is required to be below 0 in the mold; In most other cases, the temperature of the ice water required by the mold is above 5, the microcomputer full-function chiller can provide more than 5 ice water, and the low-temperature intelligent temperature control industrial chiller can meet the requirements of 5 below and below 0.

The temperature difference of ice water at the inlet and outlet of the plastic mold is often set according to the requirements of the product, in many cases, the temperature difference of 3-5 is ideal, but sometimes the temperature difference is also required to be 1-2. The smaller the temperature difference, the greater the flow of ice water is needed to take the same amount of heat out, and vice versa. For example:

A temperature difference of 5 requires a flow rate of 60 litres, while a temperature difference of 2 requires a flow rate of 150 litres.

Theory of ice water quality.

The softening of water, in the process of using the chiller, is also a problem that can not be ignored, the pH value of the water also needs to be constantly observed, the pH value should be equal to 7, the pH value greater than 7 will produce terrible corrosion phenomenon, if no measures are taken, it will be scaled in the evaporator and mold, it will play the role of heat insulation, and in serious cases, the energy conversion effect will be reduced by 30%.

Obviously, this requires consideration of the softening of hard water. The most effective way to do this is to equip the system with an electronic hard water softener, which is designed and manufactured on the principle of separation from exchange. According to the different flow rates, different specifications of softeners can be configured, directly connected to the circulating water pipeline, generally equipped with water treatment softeners, the cost is not too high, and a certain proportion of descaling agent can also be added to the circulating system at a regular time.