In a second mode, refrigerant is compressed in the positive displacement compressor and the centrifugal compressor is offline.
In an embodiment the positive displacement compressing device is used in transportation vehicles.
In a first mode, refrigerant is compressed in the positive displacement compressor and the centrifugal compressor at least partially in parallel.
In a third mode, refrigerant is compressed in the positive displacement compressor and the centrifugal compressor at least partially in series.
An apparatus (20) has a centrifugal compressor (24), a positive displacement compressor (26), a first heat exchanger (32), and a second heat exchanger (36).
In a vapor compression cycle using a positive-displacement compressor, high efficiency and high reliability are secured.
The speed of the positive displacement compressor (40) may be adjusted across a wide range in order to provide efficient operation in cruise and descent phases of aircraft flight.
Another type of positive displacement compressor is the rotary screw compressor, which uses helical rotating screws to guide air into a chamber, whose volume is decreased as the screws rotate.
As an irreplaceable positive displacement compressor, it will advance with the development of science and technology and the people's living standards.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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