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Investigations of low pressure two-phase steam-water injector.

Number: pap. 2671

Author(s) : KWIDZINSKI R., BUTRYMOWICZ D., KARWACKI J., et al.

Summary

Steam–water injector is a passive device used to compress and heat a stream of cold water. Recently such injectors found new applications in thermal engineering, refrigeration and air conditioning, e.g. low pressure steam–water injector may be applied as a thermal driven liquid pump in absorption and steam ejection refrigeration systems. In this paper a close attention is paid to steam–water injectors in which superheated steam of relatively low pressure is the driving medium. Selected results of experimental and theoretical studies of a such type of injector are presented. Experimental research was conducted on a laboratory scale injector made of transparent material. The measured parameters included the pressure and temperature distributions in the injector as well as inlet mass flow rates of both fluids during the injector stable operation. Between the measurements, inlet water flow rate and/or outlet back-pressure varied. On this basis experimental flow characteristics of the injector were determined. In theoretical part of the study, recorded distributions of pressure and temperature in the injector mixing chamber were used to evaluate the heat transfer coefficient during condensation in the mixing chamber. A new correlation predicting the Nusselt number for the heat transfer in the mixing chamber is also presented.

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Pages: 10 p.

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Details

  • Original title: Investigations of low pressure two-phase steam-water injector.
  • Record ID : 30018784
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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