F - Mech Eng,Light,Heat,Weapons – 25 – D
Patent
F - Mech Eng,Light,Heat,Weapons
25
D
62/23
F25D 23/12 (2006.01)
Patent
CA 1292879
ABSTRACT OF THE DISCLOSURE A subterranean excavation such as a mine working is cooled by a refrigeration plant having a heat rejection system at an upper station and a heat absorption system in the excavation, the refrigerant medium being ammonia. The system includes a surge drum at the upper station and maybe also at the excavation. Safety measures include the location of the vapour and liquid pipes in a borehole separate from the mine shaft or shafts.
535199
Van Der Walt Johannes
Van Rensburg Carl Stefanus Janse
Bereskin & Parr
General Mining Union Corporation Limited
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