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Development of rotary vane expander for CO2 transcritical refrigeration cycle.

Author(s) : YANG B. C., ZENG H., GUO B., et al.

Summary

The transcritical CO2 refrigeration cycle has a very high potential in various applications. One of the factors which limits its application is the relatively poor performance compared with other conventional cycles. However, the adoption of an expander can greatly improve its efficiency. This paper presents a new type of rotary vane expander for this purpose, which is used to replace the throttling valve to reduce the throttling losses. And an electrical generator is used to extract the work generated by the expander. The design of port positions and the selection of the vane materials are discussed. A test rig is built to carry out experimental research. The expander-generator unit is measured extensively in the CO2 transcritical refrigeration cycle. The recorded pressure-time diagrams indicating the working process of the expander is also presented. This prototype is made to test the functionality of the expander and get elementary test results, and it provides valuable insight and experimental results for the next step and for validating the simulation model of the device.

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Pages: 2006-2

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Details

  • Original title: Development of rotary vane expander for CO2 transcritical refrigeration cycle.
  • Record ID : 2007-1435
  • Languages: English
  • Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Publication date: 2006/05/29

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