Method and apparatus for measuring steam quality
US4679947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1985 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Jul 16, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2009/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for measuring steam quality of wet or two-phase flowing steam includes a flow-through densitometer comprised of two parallel tubes connected to two common nodes, a vibrator for causing the tubes to vibrate, and a transducer for detecting the frequency and amplitude of the vibrations. A temperature probe detects the temperature of the steam, and a computer is used to monitor the vibrations and temperature and to calculate steam quality. The computer can also be used to control the vibrator. An intake sampler is positioned in a flowing steam line to divert a representative sample of the wet steam into the densitometer. The bulk density of the steam is determined as a function of the fundamental frequency of the densitometer with the steam flowing therethrough, and the steam quality is determined as a function of the bulk density and vapor density, which is a function of temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.