Patent ID: 11898571
Assignee: TRANE INTERNATIONAL INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 16:
17. The method of claim 15, wherein
the directing of the lubricant from the lubricant tank through the lubricant pathway to the one or more bearings of the compressor includes passing the lubricant through the lubricant cooler, and
the cooling of the lubricant flowing through the lubricant pathway includes operating a first refrigeration circuit of the lubricant refrigeration system, the first refrigeration circuit including the second working fluid, an auxiliary compressor, an expander, and the lubricant cooler, the operating of the first refrigeration circuit including:
compressing the second working fluid with the auxiliary compressor,
expanding the second working fluid with the expander, and
directing the second working fluid expanded by the expander through the lubricant cooler separate from the lubricant, and the second working fluid absorbing heat from the lubricant passing through the lubricant cooler.