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Schlee (China) Refrigerating Equipment Manufacturing Co.,Ltd

Add:Jupu Road, Pukou Development Zone, Nanjing City, Jiangsu Province, China

Contact us:Cherry





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Water Cooled Screw Chiller Adjustment Range
- Oct 17, 2017 -

Multi-head water chillers can impress the user a surface reason is that the multiple-head chillers in the system load reduced to a certain extent can reduce the operation of some compressors (multiple-head is the combination of multiple screw compressors module, Water Cooled Screw Chiller when the water temperature drops to the close interval, the running time of the module combination is closed according to the proportional integral operation of the effluent. Water Cooled Screw Chiller the number of start-up compressors).

This is in the case of a compressor, 60%~100% of the air-conditioning system under the load, so as to achieve energy saving purposes. It is noteworthy that the efficiency of one (or more) compressors is discussed here, not the efficiency of chillers. According to conventional thinking, Water Cooled Screw Chiller the optimal efficiency of compressors and motors should be about 50%~90%. When compressors and motors work less than 50 of the time, efficiency drops sharply. Single-head chillers have a large load change, Water Cooled Screw Chiller wide adjustment range, according to the actual load changes, single head chillers can be changed, can save some power consumption.

When the cooling load is 60%~80%, the condenser and evaporator of the unit increase the heat transfer allowance, that is, the relative heat transfer area of condenser and evaporator is increased, Water Cooled Screw Chiller and the relative heat dissipation area of the cooling tower is also increased, which reduces the heat transfer temperature difference between refrigerant and chilled water, air and cooling, Water Cooled Screw Chiller so that the condensing temperature of the unit decreases and the evaporation temperature rises. So as to improve the efficiency of the unit, reduce user cost. When the unit 60 of the cooling load, the most electricity, unit cooling ton power consumption of 0. 6 Kw/ton, at this time the unit energy efficiency ratio is 5. 80.

For multiple head chillers, because each refrigeration system is usually independent, it is difficult for each compressor to utilize the condenser and evaporator area of the whole unit. For example, there are two compressor head units, when the entire air-conditioning system load down to 50, Water Cooled Screw Chiller the closure of a compressor, and only one of the compressor operation, at this time, the running compressor can not take advantage of the close side of the condenser and evaporator area. The compressor in operation is actually running under full load condition, Water Cooled Screw Chiller which will result in the decrease of partial load efficiency of the multi-head unit.

Whether the user can use the air-conditioning system normally, Water Cooled Screw Chiller the reliability of the unit is very important. So how is the reliability of the unit calculated? According to the American Ashrae Association's 1999 application manual 37th. 2, the unit's dependent R = r1· R2· R3·? · Rn. Water Cooled Screw Chiller The RN represents the reliability of the key components of the unit. When the unit uses multiple compressors, the unit's operating parts are doubled or more.