HOT MEDIUM FLOW RATE ESTIMATOR, HEAT SOURCE, AND HOT MEDIUM FLOW RATE ESTIMATION METHOD

摘要

The purpose of the present invention is to calculate the flow rate of a hot medium without using a flow meter. A controller (30) is provided with a memory (36) storing an aerodynamic characteristics map that shows a rotating stall line constituting a rotating stall, and a plurality of machine Mach number lines showing the speed of sound of a cold medium sucked in by a compressor (12), on a map that shows a flow rate variable (?) representing the intake air flow quantity of the compressor (12) and a pressure variable (O) representing the head of the compressor (12). The controller (30) calculates: the pressure variable (O) by means of a cold water flow rate estimator (30b); the flow rate variable (?) corresponding to the pressure variable (O), from the aerodynamic characteristics map; the quantity of heat exchanged between the cold medium and cold water in a vaporizer (24), based on the intake air flow quantity of the compressor (12) corresponding to the calculated flow rate variable (?); and the flow rate of cold water, based on the heat quantity.