For relatively shallow mines, air is cooled by a chiller on the surface and distributed underground through access shafts and tunnels. To cool deeper mines requires either sending chilled water down from the surface or producing chilled water underground. Both approaches present significant challenges.
To send chilled water underground, you have to install pipes in shaft space, which may be limited, pump it to where it’s needed, and then return the water back to the surface through another set of pipes. We have developed and successfully deployed chillers and compressors for this very purpose and application.
By contrast, producing chilled water underground means installing chillers underground. That’s easier said than done. Mines are built to move rock out, not bring chillers in. The chillers must fit within the shafts and lowered to the areas where they are to be installed – areas that are extremely hot and inhospitable. Plus, the time window for performing installations is very limited in a mining environment.
Mines vs. buildings
In a building, the spaces for chillers, compressors, pipes, and ventilation ductwork are designed in and set. You can put the chillers in before the rest of the building is built. The opposite is true for a mine. Chillers can only be installed after shafts and tunnels are dug out. What’s more, a mine evolves as more and deeper tunnels are created, which means more underground areas where chillers may have to be installed
Johnson Controls is more than up to the task.
“We’ve done this for many years, and we know what works,” said Russell Hattingh, operations manager for engineered systems and service. “We can guide our customers to selecting the right product for their application and we have the know-how to perform these highly complicated installations.”
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