Water Chiller is an industrial water chiller system with a water temperature of 6 to 30 Celsius. Water chiller uses the power consumption to separate 2 parts heat and cold heat, the heat. Unused heat is discharged into the surrounding environment by a cooling tower or only by wind blowing through it for cooling. The cold water part used in industrial cooling, central air conditioning …
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Principle of operation of water cooling chiller
Application of physical state change: condensed water vapor, liquid condensed into solid. Solid to liquid gas, the process will collect heat. The system applies the basic process of liquid to gas (evaporation) to collect heat around and cool the environment.
The water is circulated in the pipeline through Chiller to 6 ° C.
Then through the FCU / AHU heat exchanger, the chilled water is exchanged with the circulating air in the room and the room temperature decreases.
Cold water is absorbed by the heat in the heated room up to about 12 ° C circulated back to the Chiller, where the water continues to cool to 6 degrees Celsius.
Application of Chiller system
Aquarium water cooling system
The system can be used to maintain the ideal water temperature for aquariums or aquariums. Even in hot weather with high temperatures, the product will help stabilize the temperature of the water, keeping the habitat suitable for the organisms in the tank.
Central water cooling for air conditioning system
Currently Chiller is used for cooling office, high-rise buildings, convention centers, factories … with a floor area of over 20,000m2, capacity over 3000 kW.
Refrigeration for beverage industry
This is probably the most popular application of this system. The system is used to remove heat from the process during mixing, cooking, or after pasteurization.
Printing industry
In the printing industry, the thermal removal system is generated by the friction of the prints while cooling the paper after the product has come out of the ink drum.
Rubber industry
Cold industrial cooling equipment controls the water temperature of the rubber extruder box, rubber plant, calendar and mixer.
Plastic industry
In the process of plastic production, controlling the liquid to solid state of plastic is an important process that greatly influences the quality and productivity of the product. One of the most important aspects is mold temperature control. The common temperature is 30 ° C.
Concrete mixing plant
Water-cooled chiller is used in concrete mixing stations with two main uses: concrete cooling in summer and cooling of fresh concrete.
Chiller is a system that has many advantages, designed and applied to a wide variety of industries and fields. At present, the application of Chiller is not fully exploited.
Water chiller has two main types
1. Water Chiller
Composed of 4 main parts: refrigeration compressor, outdoor unit, indoor unit, control cabinet.
Refrigeration compressors: piston compressors, spiral compressors, screw compressors, centrifugal compressors.
Outdoor Chiller: Copper pipes are straight from one end to the other, water is pumped through the chassis and will cool the gas.
Evaporator: includes dry evaporator, evaporator evaporator, evaporator by stainless steel sheet.
Control Panel: The main function is to control the operation of the chiller
Operation of water cooling system
After installation, in order to ensure that the system is operating well, the equipment is operating normally, we will need to test and monitor the operation and adjust if any problems arise.
A few notes below will help you to understand the most important points in operating this system.
Preparing to run
Before the test run, the first step is to run a non-load test for each device to test its ability to operate independently before incorporating the equipment into the system and the actual operation.
Then check the important equipment of the chiller: compressors, condensers, evaporators, control panels, valves, … each device has its own inspection procedures but generally need to ensure Ensure that the components in the equipment are not damaged, are installed in the correct position, technically capable of operating the feet.
Check the oil level in the system and the balance of the chiller clusters to ensure that the oil supply system works best.
Get started
Before starting work, check the status of the valves, valves and controls – automatic control. Opening and closing valves should be carried out properly to ensure safety. All valves on the pump head to the condenser must be opened, except for the thrust valve of the compressor. All leakage valves, isolation valves are closed. Valves for compressors and devices with control, control and protection devices.
Proceed to open the water pump expansion tank, open the cooling tower pump, then the bridge valve, stop valve, motorize valve, balanced valve at the FCU, PAU or in the division between floors, open the cooling tower fan. heat to. It is necessary to perform these steps in combination with monitoring and controlling the operation of the subsystem to put the system into operational readiness.
Water flow and water distribution should be checked in the system equipment in preparation for commissioning.
Chiller start and air conditioning system. At this time, it is important to check the position of the compressor ear valves and the valves connected to the manometer and the automatic control device.
Before stopping, test drive operation of both main and auxiliary equipment.
Adjustable cooling capacity
After the trial operation and performance check, the water temperature parameters have to be adjusted to adjust the output accordingly.
2. Chiller
For this type, do not use a cooling tower. It exchanges heat from high pressure hot gas with air from the exhaust fan.
This type of cold performance is much worse than the water-cooled chiller.
But due to some special conditions, the cooling chiller is still used:
Because of the water quality is not high (acid too high, more dust when using the cooling tower will quickly cling to the walls reduce heat exchange capacity).
Space saving compared to water cooling chiller
When using the cooling tower increases the ambient humidity and bad microorganisms, polluting the environment around the plant affects human health as well as food.
The only water-cooled chiller is the non-condensing chandelier condenser, which is aluminum bronze coupler.