二相流エゼクタを適用した冷凍サイクル  [in Japanese] Refrigeration Cycle with Two-Phase Ejector  [in Japanese]

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Abstract

地球温暖化防止のため,冷凍サイクルの省動力化が求められている.二相流エゼクタを用いた冷凍サイクルは,圧縮動力の低減や冷凍サイクルの効率を向上するのに大変有用である.本研究では,二相流エゼクタサイクルの性能特性を明確化するためサイクル性能シミュレーションを行った.その結果,凝縮圧力の上昇や過冷却度が小さい場合は,エゼクタサイクルの性能向上効果が大きいことがシミュレーションによりわかった.また,実験によるエゼクタ単体性能の測定結果,エゼクタのエネルギー変換効率は約12%であることがわかった.この効率は,混合部やノズルの高効率化による向上が期待される.

The development of high efficiency refrigeration cycle is important for energy saving in order to inhibit global warming. The refrigeration cycle with two-phase ejector is very useful to decrease compressor force and raise the coefficient of performance of the refrigeration cycle. In order to make clear the characteristics of the two-phase ejector refrigeration cycle, the cycle simulation is developed in this study. The following results were obtained by using this simulation. The increment of the condenser pressure and decrement of the sub-cool temperature are effective for raising the coefficient of performance of the refrigeration cycle. The energy efficiency of the two-phase ejector used in this experiment was approximately 12%. The efficiency is expected to be increased by the improvement of the mixing characteristics of the ejector and the nozzle efficiency.

Journal

  • Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan

    Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 23(70), 31-37, 1998

    The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan

References:  3

Cited by:  2

Codes

  • NII Article ID (NAID)
    110007996282
  • NII NACSIS-CAT ID (NCID)
    AN00065706
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0385-275X
  • NDL Article ID
    4535084
  • NDL Source Classification
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL Call No.
    Z16-955
  • Data Source
    CJP  CJPref  NDL  NII-ELS  IR  J-STAGE 
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