Share

IIR document

Two-phase mass flow rate through restrictions in liquid-flooded twin-screw compressors or expanders.

Author(s) : NIKOLOV A., BRÜMMER A.

Type of article: IJR article

Summary

Liquid flooded twin-screw machines are commonly used as compressors for different applications and offer excellent prospects for energy conversion in lower and medium power ranges as expansion engines in Rankine cycles for example with regard to either waste heat recovery or electrical power generation from regenerative heat sources. With the aim of minimising internal leakages, lubricating moving machine parts, or reducing thermal stress and providing the benefits of wet expansion, a twin-screw machine can be operated with an auxiliary liquid or a two-phase working fluid. In this context, the present work provides a basic approach addressing the two-phase mass flow rate calculation in water-flooded twin-screw machines. Based on a generic inlet-geometry model, two-phase mass flow rates are recorded for different operating conditions and mass dryness fractions in particular. Appropriate approaches for the theoretical two-phase mass flow rate and discharge coefficient calculation considering restrictions in the flow section—such as orifices and nozzles—are applied. Finally, the two-phase discharge coefficients are compared with flow coefficients determined by means of experimental and theoretical two-phase mass flow rates revealing the limits and uncertainties of the models applied in this study.

Available documents

Format PDF

Pages: 152-167

Available

  • Public price

    20 €

  • Member price*

    Free

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

Details

  • Original title: Two-phase mass flow rate through restrictions in liquid-flooded twin-screw compressors or expanders.
  • Record ID : 30031153
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 148
  • Publication date: 2023/04
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2023.01.017

Links


See other articles in this issue (15)
See the source

Indexing