Performance prediction device and performance prediction method for compressor

A performance prediction device for a compressor, comprising:

• a test parameter obtaining unit that obtains test parameters including a polytropic head and a polytropic efficiency which indicate performance of a compressor being a test target of a similitude test;
• an on-site performance parameter calculation unit that calculates on-site performance parameters including a discharge pressure and power which indicate the performance of the compressor on a site different from a test facility of the similitude test, based on the test parameters obtained by the test parameter obtaining unit and an on-site operation condition at which to operate the compressor on the site;
• an on-site gas physical property correction formula database that stores on-site gas physical property correction formulae each indicating a relationship of on-site gas physical properties, including a compressibility factor and a specific heat at constant volume, of an on-site gas which includes a plurality of types of gases and which is considered by the performance prediction device to be compressed by the compressor on the site, with the on-site gas physical properties of a plurality of on-site gases different in mix ratio of the gases, the on-site gas physical property correction formulae each being associated with the types and the mix ratios of the gases;
• and
• an on-site performance parameter correction unit that selects at least one of the on-site gas physical property correction formulae from the on-site gas physical property correction formula database based on the types and the mix ratio of the gases included in the on-site gas to be actually compressed by the compressor on the site, and that corrects the on-site parameters by using the selected on-site gas physical property correction formula.