Gree Wins Central Energy Station Project in Hengqin Zone
As the basic supporting facility project for Hengqin zone, the comprehensive intelligent energy project is composed of a power station, steam heat network, energy stations, and the supplementary piping network. It adopts multiple energy supply modes through electrical refrigeration, ice storage refrigeration, and lithium bromide absorption-type refrigeration, in order to supply 4ºC cold water to users.
One of the water chillers which have won this project is Gree’s icestorage centrifugal chiller. This unit adopts a two-stage compressor to satisfy the requirement for big pressure ratio under ice storage working condition, which has greatly improved the unit’s energy efficiency.
Meanwhile, it adopts high-efficiency dual working conditions multi-point aerodynamic design, high-power and high-speed permanent magnetic synchronous motor, intelligent ice-making control, and other technologies, which can allow the unit to operate efficiently and stably whether under air conditioning working condition or ice-storage working condition.
The maximum cooling capacity of the unit is up to 3,000 tons. Coefficient of Performance (COP) is up to 4.61 and 6.11 under –6ºC of ice- making working condition and air conditioning working condition, respectively, higher than the national energy efficiency class 1. Moreover, Non-standard Part Load Value (NPLV) is up to 9.78 and the comprehensive energy efficiency is improved by 30%.
In addition, the unit can still operate stably when water outlet temperature is as low as –8ºC during ice-making period and chilled water inlet temperature is as high as 34ºC. It can be widely used in airports, hospitals, schools, shopping malls, etc.