With the development of modern industrial technology toward deep cooling and high efficiency, many process flows need to be carried out in temperature environments below zero degrees Celsius. For example, chemical synthesis, food quick-freezing, pharmaceutical refrigeration, and various laboratory tests pose even stricter challenges to refrigeration systems. Exploring and mastering advanced low-temperature refrigeration technology is of great practical significance for enhancing the overall level of industrial manufacturing.

Among various refrigeration mainframes, the water-cooled screw compression system occupies a dominant position in large-scale low-temperature engineering due to its high efficiency and powerful drive. It relies on the mutual engagement of screw rotors to compress refrigerant gas, possessing physical advantages such as fewer moving parts, low vibration, and long lifespan. It can provide a continuous output of cooling capacity for subsequent coolant circulation to meet high-load continuous operation requirements.

When the process requires the outlet water temperature to be lower than 0°C, pure water as a cooling medium will freeze and damage pipelines and equipment, so antifreeze must be introduced. The low-temperature glycol chiller uses an ethylene glycol aqueous solution as a coolant. Its freezing point decreases with the increase of ethylene glycol concentration, allowing it to maintain good fluidity and heat transfer performance at low temperatures of tens of degrees below zero, ensuring the smooth implementation of deep-cooling processes.

To reduce the pain points of complex on-site pipeline installation and large footprint, modern industrial applications increasingly favor intensive designs. The water-cooled integrated chiller unit highly integrates the compressor, condenser, evaporator, water pump, and electrical control system into a unified base or cabinet. Not only does it complete overall debugging and pipeline connection before leaving the factory, but it also greatly saves machine room space and significantly shortens the on-site construction period.

However, the environmental temperature, humidity, cooling load, and power conditions of each project are different, and general-purpose units are often difficult to perfectly adapt to complex engineering sites. Through non-standard customized screw chillers, manufacturers can flexibly adjust the heat exchange area, compressor ratio, and control logic according to the customer's actual drawings and special working conditions, creating an exclusive refrigeration system.

Overall, the continuous maturity of low-temperature refrigeration and integrated design has provided better temperature control methods for various industries. From scientific equipment selection to customized engineering implementation, every link is promoting industry toward higher efficiency and more stable operation, guarding precision manufacturing.

FAQ

Q: How should the ethylene glycol concentration be selected in a low-temperature glycol chiller?

A: The selection of ethylene glycol concentration depends on the minimum working temperature required by the system. Generally, the concentration needs to ensure that the solution will not freeze under extreme environments or shutdown states (the freezing point should be lower than the design limit temperature by more than 5°C).

Q: What are the advantages of an integrated chiller unit compared to a split unit?

A: Integrated units have advantages such as a small footprint, simple on-site installation, high system matching degree, and strict comprehensive testing before leaving the factory, which can effectively reduce comprehensive construction costs.

Q: How to judge whether industrial production requires a customized screw chiller?

A: If there are spatial constraints, special outlet water temperature requirements, special power supply voltages (such as non-standard high voltage), or special explosion-proof or anti-corrosion requirements on site, non-standard customization generally needs to be considered.