Method and apparatus for production of seeding materials
US4129252A · kind A · utility
7Cited by
7References
5Claims
0Family size
Inventor
Key dates
| Filing date | May 23, 1975 |
| Grant date | Dec 12, 1978 |
| Priority date | — |
| Expiry date | May 23, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G15/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus is provided for production of ice nuclei by generation of homogenous nuclei in nozzle or orifice expansions. The homogeneous nuclei are formed in the rapid cooling of vapors by rapid expansion through a supersonic nozzle or an orifice. These nuclei then serve as seeding materials for formation of ice. A preferred method of carrying out the invention includes heating a volatile compound in a closed chamber to form a vapor, pressurizing the chamber with nitrogen gas and controllably releasing the resulting nitrogen gas-vapor combination through a nozzle or orifice in supersonic flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.