Patent ID: 8812263

Claim:
A performance evaluation system for a centrifugal chiller including a fixed-speed turbocompressor, comprising: a data acquisition section for acquiring operating data from the centrifugal chiller as input data; a storage section storing a design COP estimation formula obtained by adding correction values corresponding to losses occurring in an actual environment to a computational formula for ideal actual-machine COP expressed using COP characteristics of a reverse Carnot cycle; and a computing section for estimating a design COP at a current operating point using the operating data acquired by the data acquisition section and the design COP estimation formula stored in the storage section; wherein the correction values include a first correction value calculated from a first computational formula including the load factor of the centrifugal chiller as a variable and a second correction value calculated from a second computational formula including a difference between cooling water outlet temperature and chilled water outlet temperature as a variable, the second correction value containing an offset from the first correction value depending on cooling water inlet temperature.