Share

Experimental analysis and design improvements on combined viper expansion work recovery turbine and flow phase separation device applied in R410A heat pump.

Number: pap. 2251

Author(s) : BARTA R. B., SIMON F., GROLL E. A.

Summary

In light of recent trends towards energy efficiency and environmental consciousness, the heating, ventilation, air conditioning and refrigeration (HVAC&R) industry has been pushing for technological developments to meet both of these needs. As such, several solutions for harnessing the energy released from refrigerants during the free expansion process of a conventional vapor-compression cycle have been developed to increase overall cycle efficiency. The goal of this research is to investigate the potential impact of installing an energy recovery expander, named Viper Expander, into an R410A heat pump cycle and to increase the efficiency of the expander. To improve the expander design, flow visualization of the two-phase refrigerant leaving the nozzle has been performed. Additionally, a housing redesign that would allow the expander to act as both an expansion work recovery device as well as a flash tank economizer has been proposed and tested as a system solution. Implementing phase separation is intended to have the combined effect of reducing turbine performance losses while also serving as an open economizer to increase overall cycle performance. An experimental investigation of these effects is presented herein, with preliminary experimental results of an expander isentropic efficiency of 18%.

Available documents

Format PDF

Pages: 10

Available

  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Experimental analysis and design improvements on combined viper expansion work recovery turbine and flow phase separation device applied in R410A heat pump.
  • Record ID : 30024462
  • Languages: English
  • Source: 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2018/07/09

Links


See other articles from the proceedings (252)
See the conference proceedings

Indexing