The NLW series water-cooled screw type low-temperature chiller is widely used in industries such as food and beverage, new materials, chemical reaction vessels, plastics, and new energy. The cold water outlet range is -35 ℃ to 5 ℃, and can be fully customized according to customer requirements. If you need a water-cooled screw type low-temperature chiller, please contact Nuo Leng customer service personnel.
The main features are as follows:
1. Industrial grade high configuration and high standard design: using high configuration and system integration to cast high-quality products, a professional team designs according to industrial grade standards, with low noise and minimal vibration. Designed according to industrial standards, it is suitable for 24/7 uninterrupted operation throughout the year;
2. Integrating multiple innovative technologies to ensure product efficiency, energy saving, stability, and excellent performance:
1) Innovative energy-saving technology for economic devices: more energy-efficient than water-cooled screw type low-temperature chillers without economic devices;
2) PLC programmable control technology: realizing the communication control of the stop and start signal of supporting equipment such as water tower and water pump, avoiding unnecessary energy loss;
3) Efficient vapor-liquid separation technology: ensures efficient heat transfer in shell and tube heat exchangers and sufficient evaporation and heat transfer in refrigerant liquid reflux evaporators;
4) Low temperature oil cooling technology: The refrigeration oil is cooled by low-temperature refrigerant, and then injected into the compressor to fully lubricate the moving parts inside the compressor and take away the heat generated by the motor, avoiding long-term high temperature inside the motor and ensuring efficient, stable, and long-lasting operation of the motor and flexibility of the moving parts.
3. Compact structure, superior performance, stable operation:
Using high-quality imported twin-screw bearings, its moving parts are only 1/10 of those of a piston compressor, and its vibration is only 1/5 of that of a piston compressor. High precision German FAG and Swedish SKF bearings are used in both radial and axial directions, combined with axial thrust balance drums to effectively balance axial loads. The failure rate is only 1/10 of that of piston compressors, and with world-renowned control components, the unit can operate safely and stably for a long time. The condenser and dry evaporator of the unit are both equipped with high-efficiency heat transfer tubes, and the main engine uses imported high-efficiency semi enclosed twin-screw compressors, which have many advantages such as compact structure, small volume, light weight, and small installation position. The semi enclosed twin-screw compressor has fewer moving parts and uses a 5:6 ultra efficient screw rotor. There is no direct wear between the rotors, making it highly reliable. Due to being a continuous compressor without pulsation, the unit has the characteristics of stable performance, low noise, small vibration, and smooth operation.
4. A comprehensive energy control system:
The water-cooled screw type low-temperature chiller has a four stage or stepless capacity control system, with energy regulation of [100, 75, 50, 25 (or start, 0%)]. It automatically adjusts the start and stop of the unit according to load changes, making it more energy-efficient. During operation, the computer control system will change the energy output of the unit based on changes in the client's thermal load. The microcomputer quickly determines the signal to push the slide valve to the required energy by monitoring the difference between the actual load measured and the user's setting. Moreover, in multiple systems, it works in an optimized way that consumes less electrical energy when outputting ideal cooling capacity. It not only exhibits excellent performance at full load, but also has high operating efficiency even at partial load.
5. Independent operation of refrigeration system:
A large capacity water-cooled screw type low-temperature chiller has two or more independent refrigeration circuits, so even if one circuit fails/needs maintenance, the other circuit can still operate normally. Equipped with backup function, especially suitable for industrial non-stop environments; The imported PLC human-machine interface is a LCD touch screen with graphical display, easy to operate, and available in both Chinese and English. Equipped with RS485 national standard communication interface, it can be connected to DCS system and connected to the entire factory automation network for remote control and monitoring. The parameters are displayed in two ways: graphics and text tables, which are clear at a glance;, Select the operation according to the menu on the screen, and simply touch the display button on the screen with your finger.
6. Microcomputer programmable PLC controller with multiple protection functions:
It has protection functions such as compressor coil temperature high protection, oil preheating timed power on/off, cold water flow switch, cold water outlet temperature low protection, Y - △ start failure protection, exhaust temperature high protection, compressor overload protection, power-off memory function, frequent start stop protection, voltage abnormality protection, low oil level protection, high and low voltage protection, etc.
7. Multiple protection, safe, reliable and stable: providing complete protection from refrigeration system, electrical system to water system, fully ensuring the safe and normal operation of the unit. Equipped with safety protections such as compressor motor overheating, overcurrent, abnormal phase sequence, high exhaust temperature, high pressure, low pressure, low pressure difference, freezing point, and interruption, as well as pressure control devices for the refrigeration system, the unit can operate without fail; In addition to the internal protection module of the compressor providing functions such as overvoltage, undervoltage, phase loss, and overload protection, the pressure control device of the refrigeration system can ensure the safe operation of the unit.
8. Easy to install and run in a timely manner:
The dedicated testing platform for industrial grade water-cooled screw type low-temperature chillers ensures that all components of the unit have been installed, tested and operated under different working conditions in the factory, ensuring that each water-cooled screw type low-temperature chiller is qualified and has been filled with refrigerant and refrigeration oil. Users only need to connect the water and circuit to put it into use, greatly reducing on-site installation and commissioning time.