Refrigeration method and apparatus
US4638638A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1985 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Jul 23, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of liquefying a permanent gas stream includes the step of reducing the temperature of the permanent gas stream at elevated pressure to below its critical temperature. The reduction in temperature is effected at least in part by countercurrent heat exchange with work expanded working fluid, at least some of which is at a temperature below the critical temperature of the permanent gas when it is brought into heat exchange relationship with the permanent gas stream. The permanent gas stream after being cooled to below its critical temperature is then subjected to at least three successive isenthalpic expansions. Resulting flash gas is separated from the resulting liquid. At least some of the flash gas is heat exchanged with the permanent gas stream at elevated pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.