multiple compressors chiller unit

When the flow number of series flooded heat exchangers in multiple compressors chiller unit is more than one, water temperature segmentation exits in one heat exchanger at least. Its influence on unit performance is not considered when designing the system. Verifies the water temperature distribution of the heat exchanger in double compressors chiller unit with the method of segmentation calculation. The results show that the calculation pressure ratios are changed +4.9% and -6.42% separately, compared with the design pressure ratio, providing the evidence for optimal design of compressor and throttle orifice. Test result shows that the unit efficiency increases by 2.26%.