Water-Cooled Screw Chiller for Central Air Conditioning Industrial Glycol Chiller

• Customization: Available
• After-sales Service: Free Change The Spare Parts
• Warranty: 12 Months
• Model NO.: SC-620WS
• Type: Water-Cooled
• Cooling Method: Water-cooled
• Unit Structure: Integral
• Selected Voltage: Customized
• Compressor Number: 1
• Noise Level: Ordinary
• Application Fields: Plastic
• Application Machine: Precision Machine Tool
• Certification: ISO, CE, UL for Electrical
• Condition: New
• Chilled Circuit: Chilled Water Circulating
• Key Selling Points: Accurate Temperature Control
• Compressor Power: 30HP to 500HP
• Cooling Capacity: 140kw to 1300kw
• Refrigeration Capacity: 120400kcal to 1118000kcal
• Working Temperature Range: 5 Deg.C to 35 Deg.C or Customized
• Refrigerant Gas: R22 or R410A, R407c, R134A, R404A Customized
• Compressor Brand: Hanbell \ Bit Zer
• Heat Exchanger: Shell and Tube Type
• Condenser Type: Shell and Tube Type
• Power Supply: 380V/3phase/50Hz or Customized
• Water Tank: Yes, Need
• Water Pump: Yes, Need
• Packaging Details: Wooden Package for Air Cooled Chiller
• Brand Name: Nanjing Startemp
• Transport Package: Wooden Package for Air Cooled Chiller
• Specification: 140KW to 1300KW
• Trademark: Startemp
• Origin: China
• HS Code: 8418692090
• Production Capacity: 100 Pieces / Month
• Package Size: 330.00cm * 140.00cm * 220.00cm
• Package Gross Weight: 2800.000kg

Product Description

Water cooled screw chiller

Water cooled screw chillers are a type of refrigeration equipment that utilize a screw compressor as the core component. These chillers are designed to transfer heat from a refrigerant to a cooling medium, typically water, which is then circulated to remove heat from a space or process.
Screw Water Chiller has two types for air cooled screw chiller and water cooled screw chiller. The cooling capacity can be selected from 120KW to 1200KW, It will be suggested adopt scroll compressor water chiller when cooling capacity less than 120KW. Max cooling temperature reach to -25deg.C.
Screw chiller is mainly applied to building industry and industrial cooling process in molding of plastic film and PE plastics bag or other industries. The chiller will greatly improve quality of molded products and shorten period of injection molding cycles. The water cooled screw chiller is made up of compressor, evaporator, condenser, refrigeration accessories, electric control system and so on. It will need auxiliary equipment to provide cooling water for the chiller heat exchange. Auxiliary equipment includes: cooling water tower, circulating water pump, insulated water tank.
The air cooled screw chiller is used the fan to dissipate heat, so it is used the finned condenser to continuously heat exchange with the air. Therefore, the air cooled screw chiller does not need cooling water tower, but it needs circulating pump and insulated water tank.

Working Principle:
The screw compressor in a water cooled screw chiller compresses refrigerant gas, which is then condensed into a liquid state in a condenser. The liquid refrigerant is expanded through a throttling valve into a low-pressure, gas-liquid mixture. In the evaporator, the liquid refrigerant absorbs heat from the water or other substance being cooled, turning back into a gaseous state. This gaseous refrigerant is then recirculated back to the compressor, completing the refrigeration cycle.
 
Efficiency and Performance:
Water cooled screw chillers are known for their high efficiency, particularly in medium to large-scale applications. The screw compressor design offers low noise, low vibration, and high compression efficiency. Additionally, the heat exchanger design, often using a patented double flow equalizer and asymmetric arrangement technology, can effectively improve heat transfer efficiency.

Main Systems:

Refrigerant circulation system: The liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate.  Finally, a certain temperature difference is formed between the refrigerant and the water.  The liquid refrigerant also completely evaporates into the gas phase, and is then inhaled and compressed by the compressor (pressure and temperature increase).  After being throttled through the expansion valve (or capillary), low temperature and low pressure refrigerant enters the evaporator to complete the refrigerant circulation process.

Water circulation system: It is an cycle that chilled water from tank into the system by the circulation pump. And then the hot water from the system returns to the chiller. When the actual temperature is higher than the set temperature, the compressor start to work. Refrigerant system absorbs the heat load of the water.

Electrical automatic control system: Including power supply part and automatic control part. The power supply part is through contactor, compressor, fan, water pump supply power. Automatic control includes temperature controller, pressure protection, delay device, relay, overload protection and other mutual combination to achieve automatic startup and stop of the root temperature, protection and other functions. Monitors and regulates the chiller's operation to maintain desired temperatures.

Main Parts:

Evaporator – water enters the chiller system.  Through the use of refrigerant, it is transformed into a low-pressure gas.
Compressor – takes low-pressure gas and compresses it to a higher pressure, which in turn allows it to flow through to the next step, the condenser.
Condenser – the high-pressure gas is cooled by refrigerant, whereby it converts back to low-pressure liquid form.
Expansion Valve – the liquid returns to the expansion valve and is directed back to the evaporator, and the cycle is repeated.

Technical Specifications:

The normal temperature range is from 5deg.C to 35deg.C. We also can manufacture the temperature range from -40deg.C to 300deg.C.

The normal refergiant is R22, Other gas needs to inform us advance.

The screw chiller normal control is by Sie mens PLC with Chinese and English.

The normal is 380V  50HZ power supply. Others need to be informed advacne.

Drawings & Dimensions: