Screw Chiller Unit Introduction

A screw-type water chiller unit is a refrigeration system that uses a screw-type compressor as the compression device. It consists of a screw-type refrigeration compressor, condenser, evaporator,

Thermal expansion valves, oil separators, and automatic control components and instruments, all integrated into assembled refrigeration units. Screw-type chillers are gaining more and more widespread application in China's refrigeration and air conditioning field.

Principle of operation for screw-type chillers

The working principle of the screw type water chiller is based on the vapor compression cycle. In this cycle, the low-temperature, low-pressure refrigerant gas is吸入 by the screw compressor, which then undergoes adiabatic compression.

Raising the temperature and pressure. The high-pressure, high-temperature gas, after compression, releases heat and condenses into a liquid refrigerant in the condenser. The liquid refrigerant, throttled by the thermal expansion valve,

As pressure and temperature drop, the liquid refrigerant becomes a low-pressure, low-temperature liquid and enters the evaporator. Inside the evaporator, the liquid refrigerant absorbs heat from the surrounding environment, evaporating into a gas, thereby achieving the cooling effect.

The gaseous refrigerant is reabsorbed by the compressor to begin a new cycle.

Screw Chiller Principle Diagram

Features of Screw Chilled Water Unit

Simple structure, stable operation: The screw-type compressor features a simple structure with fewer moving parts, no reciprocating inertia force, high rotation speed, and smooth operation.

Single-Unit High Cooling Capacity: Screw-type chillers are lightweight with a high cooling capacity per unit, ideal for medium to large-scale refrigeration requirements.

High volumetric efficiency: The screw compressor cylinder has no clearance volume and intake/exhaust valve plates, thus achieving high volumetric efficiency.

 Easy maintenance and reliable operation: Minimal wear parts for reliability, easy to repair. Not sensitive to wet strokes, allows for slight liquid presence, no risk of liquid impact.

 Adjustable cooling capacity: Cooling capacity can be infinitely adjusted via a slider valve, for easy use.

Energy-saving performance: Good regulation under partial load, energy consumption meets modern energy-saving standards.

Environmental-friendly Refrigerants: Optional for eco-friendly refrigerants, such asR134a and others, environmentally friendly.

Smart Control: Equipped with a microcomputer control program and a large-screen Chinese display color LCD touch screen, user-friendly interface, easy operation.

Safety Protection: Equipped with various protective devices such as high and low voltage protection, water cutoff protection, overload protection, etc., ensuring safe operation.

Open frame design: Aesthetically pleasing, with a simple structure that allows operators to easily check the equipment's operation at any time, and is convenient for installation and maintenance.