Jason P Busch

US Patent:

20210010478, Jan 14, 2021

Filed:

Jul 10, 2019

Appl. No.:

16/507343

Inventors:

- Minneapolis MN, US
Midori DRAKE - Minneapolis MN, US
Jason BUSCH - Plymouth MN, US

International Classification:

F04D 17/12
F04D 29/28
F25B 31/02

Abstract:

A centrifugal compressor is configured to be used for compressing a low global warming potential (GWP) refrigerant. The centrifugal compressor comprises a casing, an impeller, and a motor for rotating the impeller. The impeller is equipped with blades having a fully nonlinear shape in a quasi-orthogonal cross-sectional view. A hub-side blade angle delta of each of the blades from a hub portion of the first impeller to a mid-span position of the blade varies along a streamwise direction such that the hub-side blade angle delta is largest at a position closer to a leading edge of the first blade than to a trailing edge of the first blade. The casing is configured such that the low global warming potential (GWP) refrigerant enters the impeller from the inlet portion along an axial direction of the impeller and exits the impeller to the outlet portion in a radial direction of the impeller.