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Applied optimisation of a twin screw expander for electrical power generation in a waste heat recovery system using an organic working fluid

Number: 1114

Author(s) : SPENCER S., CHURCHUS R., MILLER J., OLIVER D., SMITH R., LAWSON D.

Summary

This research investigates the applied optimisation of a twin screw expander which forms part of a prototype Controlled Phase Cycle (CPC) application, addressing the energy trilemma of emissions reduction, security of supply and cost savings in industrial environments. The optimisation of the expander’s performance affords an opportunity to improve on the low conversion efficiencies displayed by current ORC waste heat recovery systems, with projected CPC efficiencies upward of 6%.
The system uses R1233zd (E) as the organic working fluid and is designed to generate 80 kW of electrical power by harnessing a 1 MW thermal low pressure steam supply. A comparison of theoretically and empirically derived elements, including the effects of Built in Volume Ratio (BIVR), fluid gas fraction, mass flow rate, pressure and temperature on the expander’s operation enable the validation and quantification of optimised expander operation.

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Pages: 7

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Details

  • Original title: Applied optimisation of a twin screw expander for electrical power generation in a waste heat recovery system using an organic working fluid
  • Record ID : 30027643
  • Languages: English
  • Source: IIR Rankine Conference 2020.
  • Publication date: 2020/07/31
  • DOI: http://dx.doi.org/10.18462/iir.rankine.2020.1114

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