Methods and devices used for automatically controlling speed of an expander
US8761958B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 2011 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Aug 6, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of controlling a transition time through a speed range that is unsafe for an integrity of a second expander that receives a fluid flow from a first expander, by automatically biasing a speed of the second expander is provided. The method includes setting the speed of the second expander to be smaller than a current speed of the first expander. The method also includes setting the speed of the second expander to be larger than the current speed of the first expander, when the current speed of the first expander is within the bias application range, and the current speed of the second expander increases and is larger than the first speed value, or decreases and is larger than the second speed value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.