Liquid metal heat exchanger for efficient heating of soils and geologic formations
US7665524B2 · kind B2 · utility
1Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2006 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Jun 25, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28D15/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for efficient heating of subterranean earth includes a well-casing that has an inner wall and an outer wall. A heater is disposed within the inner wall and is operable within a preselected operating temperature range. A heat transfer metal is disposed within the outer wall and without the inner wall, and is characterized by a melting point temperature lower than the preselected operating temperature range and a boiling point temperature higher than the preselected operating temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.