螺杆式制冷系统的原理
Principle of screw refrigeration system
螺杆式冷水机组是蒸气压缩式制冷机组中的一种。其工作原理是通过压缩机对气态制冷剂施加能量，从而使其压力、温度得到提高，然后再通过冷凝、节流等等过程，使之变成低压，低温液态制冷剂在蒸发器内蒸发为气体，与此同时，它从周围环境（比如冷水）中获得热量使载冷剂的温度降低，从而达到人工制冷的目的。
Screw chiller is a kind of vapor compression chiller. Its working principle is to apply energy to the gaseous refrigerant through the compressor, so as to increase its pressure and temperature, and then turn it into low pressure through condensation, throttling and other processes. The low-temperature liquid refrigerant evaporates into gas in the evaporator. At the same time, it obtains heat from the surrounding environment (such as cold water) to reduce the temperature of the refrigerant, so as to achieve the purpose of artificial refrigeration.