公开(公告)号：US20210095682A1

公开(公告)日：2021-04-01

申请号：US17039567

申请日：2020-09-30

Applicant: TRANE INTERNATIONAL INC.

Inventor： Sung Hwa JEUNG ,  Joseph M. HEGER ,  Charles E. ROESLER, JR. ,  Jay H. JOHNSON ,  Robert S. BAKKESTUEN

IPC: F04D29/057 ,  F04D29/58 ,  F25B31/00

Abstract: A heat transfer circuit includes a compressor, a condenser, an expander, and an evaporator. The compressor includes a shaft that is rotated to compress a working fluid and a gas bearing to support the shaft. A conduit is configured to supply a portion of the working fluid to the compressor to cool the gas bearing. A method of controlling a heat transfer circuit includes directing a working fluid through a main flow path of the heat transfer circuit that directs the working fluid through a compressor, a condenser, an expander, an evaporator, and back to the compressor. The method also includes suppling supplying a portion of the working fluid in the main flow path to the compressor to cool a gas bearing of the compressor.