Novel rotary sliding vane expanders with small eccentricity and guide vane ports : Numerical simulation and structural parameter analysis
(2024) In Applied Thermal Engineering 254.- Abstract
Expanders are key equipment in energy storage systems. Traditional sliding vane expanders have many problems, such as severe friction, non-uniform flow fields and limited flow rates. To address these issues, a novel rotating-cylinder sliding vane rotary expander (RC-SVRE) with small eccentricity and guide vane ports is proposed where the rotating-cylinder keeps a distance from the rotor to reduce friction between each other and guiding vanes are added into the intake and exhaust ports to improve flow fields. The friction loss and flow fields are predicted through theoretical analysis and numerical simulations, respectively. Compared with traditional expanders, the friction at sliding vane tips as well as that between the rotor and... (More)
Expanders are key equipment in energy storage systems. Traditional sliding vane expanders have many problems, such as severe friction, non-uniform flow fields and limited flow rates. To address these issues, a novel rotating-cylinder sliding vane rotary expander (RC-SVRE) with small eccentricity and guide vane ports is proposed where the rotating-cylinder keeps a distance from the rotor to reduce friction between each other and guiding vanes are added into the intake and exhaust ports to improve flow fields. The friction loss and flow fields are predicted through theoretical analysis and numerical simulations, respectively. Compared with traditional expanders, the friction at sliding vane tips as well as that between the rotor and rotating cylinder of new RC-SVREs can be reduced by more than 98%. Among three optimized port configurations, the scheme #1 with guiding vanes and a 12 mm eccentricity obtains the lowest outlet temperature of 422.35 K and the highest isentropic efficiency of 62.27% because guiding vanes are conducive to intensifying the rotational velocity of working fluid. Among three optimized eccentricities, the scheme #4 with guiding vane and a 9 mm eccentricity obtains the lowest discharge temperature of 418.82 K and the highest flow rate of 2.365×10−2 kg/s. When comprehensively comparing all schemes, scheme #4 performs the most optimal due to the combined effects of port configurations and the smallest eccentricity. This work provides the possibility for designing novel sliding vane rotary expanders.
(Less)
- author
- Gu, Huaduo LU ; Chen, Yaping ; Wu, Jiafeng and Sundén, Bengt LU
- organization
- publishing date
- 2024-10
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Guiding vane ports, Low mechanical friction, Performance investigation, Rotating-cylinder sliding vane rotary expander, Small eccentricity, Structural optimization
- in
- Applied Thermal Engineering
- volume
- 254
- article number
- 123820
- publisher
- Elsevier
- external identifiers
-
- scopus:85198010312
- ISSN
- 1359-4311
- DOI
- 10.1016/j.applthermaleng.2024.123820
- language
- English
- LU publication?
- yes
- id
- d1c2b738-75c8-40e8-854c-6a301853fa63
- date added to LUP
- 2024-09-05 15:13:21
- date last changed
- 2024-09-05 15:13:48
@article{d1c2b738-75c8-40e8-854c-6a301853fa63,
abstract = {{<p>Expanders are key equipment in energy storage systems. Traditional sliding vane expanders have many problems, such as severe friction, non-uniform flow fields and limited flow rates. To address these issues, a novel rotating-cylinder sliding vane rotary expander (RC-SVRE) with small eccentricity and guide vane ports is proposed where the rotating-cylinder keeps a distance from the rotor to reduce friction between each other and guiding vanes are added into the intake and exhaust ports to improve flow fields. The friction loss and flow fields are predicted through theoretical analysis and numerical simulations, respectively. Compared with traditional expanders, the friction at sliding vane tips as well as that between the rotor and rotating cylinder of new RC-SVREs can be reduced by more than 98%. Among three optimized port configurations, the scheme #1 with guiding vanes and a 12 mm eccentricity obtains the lowest outlet temperature of 422.35 K and the highest isentropic efficiency of 62.27% because guiding vanes are conducive to intensifying the rotational velocity of working fluid. Among three optimized eccentricities, the scheme #4 with guiding vane and a 9 mm eccentricity obtains the lowest discharge temperature of 418.82 K and the highest flow rate of 2.365×10<sup>−2</sup> kg/s. When comprehensively comparing all schemes, scheme #4 performs the most optimal due to the combined effects of port configurations and the smallest eccentricity. This work provides the possibility for designing novel sliding vane rotary expanders.</p>}},
author = {{Gu, Huaduo and Chen, Yaping and Wu, Jiafeng and Sundén, Bengt}},
issn = {{1359-4311}},
keywords = {{Guiding vane ports; Low mechanical friction; Performance investigation; Rotating-cylinder sliding vane rotary expander; Small eccentricity; Structural optimization}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Applied Thermal Engineering}},
title = {{Novel rotary sliding vane expanders with small eccentricity and guide vane ports : Numerical simulation and structural parameter analysis}},
url = {{http://dx.doi.org/10.1016/j.applthermaleng.2024.123820}},
doi = {{10.1016/j.applthermaleng.2024.123820}},
volume = {{254}},
year = {{2024}},
}