Brief introduction of screw chiller

Brief introduction of Carrier screw chiller: It is efficient and energy-saving, and can meet the application of air conditioning and ice storage, process cooling and heating. The new generation 06T twin-screw compressor is efficient and reliable. Chinese touch screen controlled by computer. Adopt the leading HFC- 134a refrigerant.

Screw chiller is a kind of chiller based on various types of screw compressors. It is an assembled refrigeration device composed of screw refrigeration compressor, condenser, evaporator, thermal expansion valve, oil separator, automatic control element and instrument. Screw chillers are widely used in the field of refrigeration and air conditioning in China, and their typical refrigeration capacity ranges from 700 to 1000 kW.

The main performance and parameters of Carrier screw chiller: the design of proprietary screw rotor profile, the compressor rotor is directly driven by the motor, with outstanding compression efficiency and quiet operation. Advanced economizer and double-loop design, stepless adjustment of compressor capacity by slide valve and accurate dynamic control of electronic expansion valve optimize the partial load efficiency of the system.

Intelligent energy-saving reset function, through high-sensitivity temperature sensor, automatically adjust the outlet temperature of chilled water when the temperature of backwater or outdoor environment drops. The unique automatic switching function between air conditioning and ice-making conditions realizes the efficient integration with ice storage system, which perfectly meets the comfort requirements of energy-saving buildings.

The lowest outlet water temperature of evaporator can reach-12℃, and the highest outlet water temperature of condenser can reach 63℃. The operation range is wide, and the whole line can meet the cooling and freezing requirements of different processes. Excellent condensation heat recovery function, which can make hot water as high as 63℃ for free, ensuring air conditioning heating and sufficient domestic hot water.

Selection point

1. The main control parameters of screw chiller are refrigeration performance coefficient, rated refrigeration capacity, input power and refrigerant type.

2. The selection of water chillers should be considered according to the cooling load and use. For the refrigeration system with long working time under low load, it is advisable to choose multi-head piston compressor or screw compressor, which is convenient to adjust and save energy.

3. When selecting water chillers, give priority to units with higher performance coefficient. According to statistics, the running time of general water chillers under 100% load accounts for less than 1/4 of the total running time. In the total running time, the running time ratio of 100%, 75%, 50% and 25% load is approximately 2.3%, 4 1.5%, 46. 1% and1.

Therefore, when selecting water chillers, the model with relatively flat efficiency curve should be given priority. At the same time, the adjustment range of chiller load should be considered in the design and selection. Multi-head screw chiller has excellent part-load performance and can be selected according to the actual situation.

Baidu encyclopedia-screw chiller