What is a industrial water cooled chiller?
A water cooled chiller is one of the types of chillers that removes heat from it to cool the water used in projects or industrial or domestic structures and re-enters the water into the operation cycle. In fact, chillers transfer heat from a space that needs temperature control and transfer it to another space. Therefore, the chiller is not a means of generating cold, but a means of dissipating heat, and its task is to facilitate the transfer of unwanted and undesirable heat caused by the activity to a place outside the system.
A cooling tower is specifically designed for the water-cooled chiller. Because condensers of water-cooled chillers use water as their stimulant and cooling material. Because wet surfaces are more successful at transferring heat and also do compression work at wetter bubble temperatures, the efficiency of water-cooled chillers increases.
Water-cooled chiller advantages includes
1.Longer Lifespan
2.Quiet Operation
3.Energy Efficiency
4.No Open Space Needed
5.Safety
How does a water-cooled chiller work?
The cycle of water-cooled chillers, like any other chiller, consists of four main members: evaporator, compressor, condenser and expansion valve, in each of which a thermodynamic process takes place. The way the chiller works is that the refrigerant is delivered to different phases of the material at different pressures and temperatures to cool the water instead and pump it out of the chiller. In fact, the main work of chillers is based on the phase change or physical state of the refrigerant or refrigerant. In the meantime, the work of water-cooled chillers is based on the condensation of steam or gas.
Applications and limitations
As mentioned earlier, water-cooled chillers are used for domestic and non-domestic purposes. Cooling water chillers can be found in large and medium-sized structures and buildings, such as hospitals, airports, manufacturing plants, industrial workshops, shopping malls and even residential buildings, but all of this is provided that there is sufficient water to meet the water-cooled chiller needs. . Finally, it can be concluded that water-cooled chillers are suitable for high or medium capacity installations that have sufficient access to water and do not face the problem of water shortage. Also, the use of these chillers is not recommended in wet cities.
In fact, one of the limitations of using water-cooled chillers is that they use very high amounts of water. As such, the water-cooled chiller is not suitable for areas struggling with water shortages and may not be responsive. Also, water supply has its own costs.
Here let's see the 50kw industrial water chiller water cooled specs:
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Item |
Specification / Supplier |
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|
Cooling capacity |
Model |
AYD-15W |
|
|
kw/hr |
53.01 |
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|
ton/hr |
15.07 |
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|
Power input |
kw |
15.31 |
|
|
Power Supply |
380V-3N-60HZ |
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Temp Outlet (℃) |
7 |
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|
refrigerant control |
Expansion valve |
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Refrigeration circle |
Three |
||
|
refrigerant |
R407C |
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Dimension(mm)L*W*H |
1700*800*1300 |
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|
Compressor |
Style |
Hermetic Scroll |
|
|
Quantity（set） |
3 |
||
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Compressor Power(kw) |
13.11 |
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Condenser |
Style |
Shell and tubes/1set |
|
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Water Flow( m3/h ) |
11.6 |
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Pipe size（DN） |
50 |
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|
Evaporator |
Style |
Shell and Tubes/ 1set |
|
|
Cold water flow（m3/h） |
9.16 |
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Pipe size（DN） |
40 |
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|
Water Pump(kw) |
2.2(7.2m3/h, 3.3bar) |
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|
Water Tank(L) |
180 |
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Protector Device |
1.Phase protector 2.Overload protector 3.High/low voltage protector 4.overheat protector 5.Anti-freeze protector |
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|
Unit Weight（kg） |
400 |
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|
Main Parts |
|||
|
Compressor |
Sanyo/Panasonic |
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|
Electronic |
Chnt /LS |
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Electrical control |
Punp |
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Remarks: The cooling capacity is based on condensing water inlet/outlet temp 32/37C,inlet/outlet temp 12/7C.
RFQ:
1. What's the system composition of water chiller
a. Refrigerant circulating system:
The liquid refrigerant in the evaporator absorbs the heat from the water and begins to evaporate. The liquid refrigerant is also completely vaporized into a gas state and then sucked into the compressor for compression. The gaseous refrigerant absorbs heat through the condenser, condenses into a liquid, and enters the evaporator through the thermal expansion valve (after throttling, it becomes a low temperature and low pressure refrigerant, which completes the refrigerant cycle.
b. Basic components of the refrigeration system:
Compressor: convert the input electric energy into mechanical energy to compress the refrigerant.
Condenser: in the refrigeration process, the condenser plays the role of outputting heat energy and condensing refrigerant
Liquid accumulator: the liquid accumulator is installed behind the condenser to make full use of the cooling area of the condenser. On the other hand, it is used to regulate and store refrigerant.
Drying filter: in the refrigeration cycle, prevent water and dirt from entering
Thermal expansion valve: the thermal expansion valve is both a flow control valve and a throttle valve in the refrigeration system
Evaporator: The evaporator is a heat exchange device that absorbs the heat of the cooling medium by relying on the evaporation of the refrigerant liquid.
c. Water circulation system:
The water circulation system is a water pump, which pumps water from the water tank to the equipment that users need to cool. The chilled water takes away the heat, then the temperature rises and returns to the chilled water tank.
d. Electric automatic control system:
The electric automatic control system includes the power supply part and the automatic control part.
The power supply part provides power for the compressor, fan, water pump, etc. through the contactor.
The automatic control part includes thermostat, pressure protection, time delay device, relay, overload protection, etc., to realize automatic start stop, protection and other functions according to water temperature.
2.How to maintain the equipment?
Step 1: Keep Tubes Clean
Step 2: Ensure a Leak-free Unit
Step 3: Sustain Proper Water Treatment(prevent scale, corrosion)
Step 4: Analyze Oil and Refrigerant
Chiller maintenance
The maintenance content of the chiller is usually divided into two parts. One part is about the items that need regular inspection and maintenance such as vulnerable parts of the equipment, which we call monthly regular maintenance; Another item is the in-depth maintenance of major components such as condenser and compressor after a certain period of operation, which is called annual maintenance.
Monthly regular maintenance of chiller:
1. Check whether the voltage is normal and phase loss.
2. Check and record the running current.
3. Measure and record whether the high and low pressure and temperature control temperature are normal. (During normal operation, the high pressure is 1.5MPa/the low pressure is 0.45MPa)
4. Check whether the interlocking control circuit device is loose and aging.
5. Check whether the oil level and oil temperature are normal.
6. Check the compressor for abnormal sound and vibration.
7. Refrigerant system test.
8. Overall commissioning and test.
9. Regularly check whether the quality of chilled water and cooling water is normal, and change the water source in time when the water quality becomes dirty and deteriorated.
Annual maintenance content of chiller
1. Clean the condenser (clean it once every six months).
2. Clean the cooling tower (water cooling type shall be cleaned once every three months).
3. Check the refrigeration oil and lubricating oil system, and replace and supplement if necessary.
4. Check and maintain the host circuit system.
5. Compressor motor coil insulation test.
6. Check whether the drying filter is normal and blocked, and replace it if necessary.
7. Check the refrigerant quantity and replenish the refrigerant in time.
8. Check and correct the high and low pressure switches.
9. Check and calibrate the thermostat.
10.Test run and general correction, test whether the superheat is normal, and whether all components have abnormal sound.
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