Estimation apparatus of heat transfer medium flow rate, heat source machine, and estimation method of heat transfer medium flow rate
US9541318B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2012 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Jun 21, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/1351
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
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 θ reflecting a suction volume of the compressor (12) and a variable Ω reflecting a head of the compressor (12); a estimation portion of chilled water flow rate (30b) computes the variable Ω, derives the variable θ according to the variable Ω 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 θ, and computes the flow rate of the chilled water based on the heat amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.