Ultra- high- efficient Two Stage Compression Screw Chillers with VFD
- GREE ELECTRIC APPLIANCES.INC.OF ZHUHAI
- product brand:GREE
- Numéro de stand：W2D25E1D01E3G43W1K11
- product specification:
- product category:Refrigeration Equipment-Refrigeration systems and plants-Chillers, liquid
- product introduction:Applying two-stage compressor technology to water-cooled screw chillers, constructing a two-stage compression and intermediate air replenishment refrigeration cycle to improve system energy efficiency; Invention of weak gas pulsation with isomorphic teeth and multi blade large torsion angle screw rotor profiles adapted to small pressure ratios, fundamentally avoiding the strong airflow pulsation turbulence dissipation caused by asynchronous exhaust in traditional profiles; We have invented a low resistance flow layout structure that accurately adapts the non-uniform pressure distribution characteristics of low-speed fluids within the interdental volume, achieving precise adaptation of exhaust flow rate and exhaust port area changes, reducing the pressure pulsation amplitude within the interdental volume of the rotor during the exhaust process, and improving the isentropic efficiency of the compressor; Invention of a multi parameter linkage adjustment coupling control method for two-stage pressure ratio under variable operating conditions, achieving precise adaptation of pressure ratio adjustment without position, eliminating macro level over compression and under compression, and operating efficiently over a wide range. Compared to the first level energy efficiency limit specified in the national standard GB 19577, the COP exceeds 20.3% and the IPLV exceeds 34.7%.
