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A study of mass flow characteristics of a refrigerant injector.

Number: pap. ID: 271

Author(s) : ROH C. W., HAN G. H., KIM M. S.

Summary

It is important to control the refrigerant mass rate accurately in a heat pump to obtain its optimum heating/cooling capacity. It is needed to secure optimized valve control technology to adjust the cycle which shows better performance in various environmental conditions giving optimum efficiencies at those operating conditions. In this study, we propose to use solenoid-driven injectors instead of conventional expansion valves. Unlike the conventional expansion valves that having a continuous flow, the injector can control the injection rate of refrigerant by opening frequency and at its duty, so it allows an accurate control of refrigerant mass flow rate. First, the authors introduce a driving mechanism of an injector. Second, the experimental setup is introduced to investigate the mass flow controllability of the injector. Third, the experimental result about the mass flow controllability of the injector is presented by using a refrigerant, HFC-134a. Finally, differences between the conventional expansion valve and the injector are discussed in the view of flow control mechanism.

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Pages: 5 p.

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Details

  • Original title: A study of mass flow characteristics of a refrigerant injector.
  • Record ID : 30002390
  • Languages: English
  • Subject: HFCs alternatives
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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