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Quality measurement of two phase flow with plug flow.

Number: pap. 2225

Author(s) : FUKUTA M., MIYATA S., MOTOZAWA M., et al.

Summary

In refrigeration cycles especially at an injection line of injection cycles, quality measurement of two-phase refrigerant flow is required to check or control the cycle. Although sectional void fraction of the two-phase flow at a certain position of the pipe can be detected, the quality of the two-phase flow is not obtained from the sectional void fraction since velocities of liquid and gas phase in the pipe are different from each other. In this study, the new quality measuring method was developed based on a concept that the velocities of liquid and gas become almost the same in a narrow tube with flow pattern of plug flow, where the quality of the two-phase flow can be derived from the void fraction of the plug flow. The feasibility of the quality measurement based on the void fraction measurement in the narrow tube with plug flow is shown. The quality range of the measurement can be extended with installing a gas bypass tube. The accuracy of the quality measurement within ±10% error is achieved in the plug flow region.

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Pages: 9

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Details

  • Original title: Quality measurement of two phase flow with plug flow.
  • Record ID : 30024457
  • Languages: English
  • Source: 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2018/07/09

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