Patent ID: 7231773
Filing Date: 2007-06-19
Classification: F25B,Y02B

Abstract:
1. A method for determining a number of compressors to start in a multiple compressor chiller system, the method comprising the steps of: providing a multiple compressor chiller system having a predetermined number of compressors and a variable speed drive, the variable speed drive having a predetermined number of inverters, wherein each inverter is configured to power a corresponding motor of a compressor; designating a number of inverters to be enabled on startup of the multiple compressor chiller system, wherein the designated number of inverters to be enabled on startup being initially equal to the predetermined number of inverters, and wherein enabling of an inverter at startup of the multiple compressor chiller system starts a corresponding compressor; determining whether at least one predetermined criteria related to conditions of the multiple compressor chiller system is satisfied; and reducing the designated number of inverters to be enabled on startup by a predetermined amount in response to a determination that a predetermined criteria has been satisfied.