ESTIMATION APPARATUS OF HEAT TRANSFER MEDIUM FLOW RATE, HEAT SOURCE MACHINE, AND ESTIMATION METHOD OF HEAT TRANSFER MEDIUM FLOW RATE

摘要

A flow rate of a heat transfer medium is computed without a flow meter. In a control apparatus (30), a storing portion (36) stores an aerodynamic characteristic map indicating a line causing a rotating stall and lines showing a sonic velocity in a refrigerant sucked in by a compressor (12) on a map displaying a variable theta reflecting a suction volume of the compressor (12) and a variable Omega reflecting a head of the compressor (12); a estimation portion of chilled water flow rate (30b) computes the variable Omega, derives the variable theta according to the variable Omega from the map, computes a heat amount exchanged between the refrigerant and the chilled water in an evaporator (24) based on the suction volume of the compressor (12) according to the computed variable theta, and computes the flow rate of the chilled water based on the heat amount.