Axial and radial force control for a [CO.sub.2] scroll expander.(Report): An article from: HVAC & R Research

This digital document is an article from HVAC & R Research, published by American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. on July 1, 2009. The length of the article is 4305 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.

From the author: In this study, the scroll profile of the scroll expander was designed for [CO.sub.2] refrigerant in order to make use of overexpansion and to control the axial force on the thrust bearing. This approach realized that the orbiting scroll never separated from the stationary scroll even when the operating condition changed dramatically. From the analysis on the oil-film pressure forces of the main and eccentric bearings, the radial force between the scroll wraps could be controlled, which in turn contributed to a decrease in the leakage loss in the expansion process. Test results for a prototype of the scroll expander with high-pressure shell design demonstrated the volumetric efficiency as high as 96%.

Citation Details
Title: Axial and radial force control for a [CO.sub.2] scroll expander.(Report)
Author: Akira Hiwata
Publication:HVAC & R Research (Magazine/Journal)
Date: July 1, 2009
Publisher: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.
Volume: 15 Issue: 4 Page: 759(12)

Article Type: Report

Distributed by Gale, a part of Cengage Learning