![Study of a rotary vane expander for the transcritical [CO.sub.2] cycle--part I: experimental investigation.(Report): An article from: HVAC & R Research](https://www.ebooknetworking.net/books/noimage.jpg)
Study of a rotary vane expander for the transcritical [CO.sub.2] cycle--part I: experimental investigation.(Report): An article from: HVAC & R Research
Price not available for France
You can still browse on Amazon. Try another country above.
Book Details
ISBN / ASIN
B003S0WYF8
ISBN-13
978B003S0WYF9
Marketplace
France 🇫🇷
Description
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 6518 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: This paper presents the experimental investigation of a double acting rotary vane expander for work recovery in the transcritical [CO.sub.2] cycle and focuses on the design improvements for leakage and friction within the expander. The bench tests were carried out to investigate the leakage and friction distributions within the expander. The test results showed that the end gaps caused the major leakage within the improved expander prototype, while the friction losses associated with the vanes--especially due to the springs in the slots--were dominant and accounted for about 70% of the total friction losses. By comparing the pressure-rotation angle diagrams of the improved prototype with the original one, the effects of adding springs in the slots and arranging sealing vanes at the sealing arc on the thermodynamic processes were analyzed. It was shown that the tight contact between the vanes and cylinder wall owing to the springs had a significant improvement on the thermodynamic processes in that the cycle duration resumed being normal and the expander demonstrated a reasonable expansion process. By putting springs in the vane slots and arranging the sealing vane in the cylinder at the sealing arc, the volumetric efficiency increased from 17% to 30%, and the isentropic efficiency improved from 9% to 23%, resulting in a maximum coefficient of performance COP improvement of 14.2% compared with the throttling cycle under the same test conditions.
Citation Details
Title: Study of a rotary vane expander for the transcritical [CO.sub.2] cycle--part I: experimental investigation.(Report)
Author: Bingchun Yang
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: 673(16)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: This paper presents the experimental investigation of a double acting rotary vane expander for work recovery in the transcritical [CO.sub.2] cycle and focuses on the design improvements for leakage and friction within the expander. The bench tests were carried out to investigate the leakage and friction distributions within the expander. The test results showed that the end gaps caused the major leakage within the improved expander prototype, while the friction losses associated with the vanes--especially due to the springs in the slots--were dominant and accounted for about 70% of the total friction losses. By comparing the pressure-rotation angle diagrams of the improved prototype with the original one, the effects of adding springs in the slots and arranging sealing vanes at the sealing arc on the thermodynamic processes were analyzed. It was shown that the tight contact between the vanes and cylinder wall owing to the springs had a significant improvement on the thermodynamic processes in that the cycle duration resumed being normal and the expander demonstrated a reasonable expansion process. By putting springs in the vane slots and arranging the sealing vane in the cylinder at the sealing arc, the volumetric efficiency increased from 17% to 30%, and the isentropic efficiency improved from 9% to 23%, resulting in a maximum coefficient of performance COP improvement of 14.2% compared with the throttling cycle under the same test conditions.
Citation Details
Title: Study of a rotary vane expander for the transcritical [CO.sub.2] cycle--part I: experimental investigation.(Report)
Author: Bingchun Yang
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: 673(16)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
