Energy regulation and surge
At present, various manufacturers used in centrifugal chillers in the energy regulation are regulation, inlet guide vane compressor frequency control ten days diffuser width adjustment, but also manufacturers the method of comprehensive adjustment in together. Different energy regulation is a very important factor in determining the surge point of a centrifuge.
(1) the use of ordinary nozzle guide vanes, the surge point in the 20~30 load between different brands of different units.
(2) using the inlet guide vane adjustment and the compressor impeller variable frequency speed regulation, the surge point can be controlled at about 10 load.
(3) using the inlet guide vane adjustment and the width of the compressor diffuser, the surge point can be controlled at about 10.
(4) the inlet guide vanes are arranged for each stage of the multi-stage centrifugal machine, and the surge point can be controlled at about 10.
The same COP value as the part load, the surge point were measured at varying cooling water inlet temperature, and the actual use of the cooling water temperature changes little, because this is the surge in the actual use of the process when the loading rate is better than promised to be high. Therefore, in the selection of units to ask manufacturers to provide cooling water temperature surge point, which has a real meaning.
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