Fluid machine system

Abstract

A fluid machine system (1) comprises a controller (20) that calculates an evaluation value quantitatively indicating the state of a heat exchanger according to the current values of a plurality of physical quantities detected by a plurality of sensors during the operation of a fluid machine. The controller (20) stores a first arithmetic expression (F4a, F6a) for calculating the actual value of an evaluation value indicating the current state of the heat exchanger according to the current values, and a second arithmetic expression (F4b, F6b), which is determined on the basis of detection values of the plurality of physical quantities acquired before a deterioration in the performance of the heat exchanger, for calculating a predicted value of an evaluation value indicating the state of the heat exchanger before the deterioration in the performance of the heat exchanger according to the current values. The controller (20) compares the actual value with the predicted value and determines whether the performance of the heat exchanger is deteriorating.

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