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Improvement of domestic CO_2 air conditioner by integrating compressor/expander combination

Research Project

Project/Area Number 16560181
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionShizuoka University

Principal Investigator

FUKUTA Mitsuhiro  Shizuoka University, Mechanical engineering, Associate professor, 工学部, 助教授 (70199222)

Co-Investigator(Kenkyū-buntansha) YANAGISAWA Tadashi  Shizuoka University, Mechanical engineering, Professor, 工学部, 教授 (60126787)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2004: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsGlobal warming / Natural refrigerant / Carbon dioxide / Expander / Refrigeration cycle / 膨脹機
Research Abstract

As an attempt of increasing the energy efficiency of a refrigeration cycle working with carbon dioxide by recovering a throttling loss, basic performances of a vane type expander and a scroll type expander were clarified and trans-critical leakage flow occurring in the expander and performance of a cycle with an expander/compressor combination were examined in this study.
The total efficiency of the vane expander is 59% by optimization of clearances and a reduction of a shaft seal. The trans-critical expansion process changes according to an inlet temperature of the expander, and although a delay of flash is observed when the inlet temperature is low, good performance is obtained over the range of tested temperature. The scroll expander which was made using a scroll compressor element without major modification shows the total efficiency of 56% and a potential of having enough efficiency with an optimized design. The trans-critical leakage flow was examined experimentally using a channel model and it can be analyzed by a homogenous flow model with taking account of inlet acceleration, frictional loss and acceleration loss in the leakage clearance although an improvement of the model is needed when the leakage becomes choked flow. In addition, a prototype of compressor/expander combined machine was developed and its operating characteristics were measured. Operating balance point and the performance of the cycle with the combined machine were examined with considering the performances of expander and compressor. An improvement of cycle performance is obtained by 21% compared to a cycle with an expansion valve. Although the cycle performance decreases under off-design conditions, the performance will be improved by a bypass or a pre-expansion. In this study, a superior compressor/expander combined machine was not developed yet. But achievements of this study show feasibility of a CO_2 air conditioning system.

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (25 results)

All 2006 2005 Other

All Journal Article (21 results) Patent(Industrial Property Rights) (4 results)

  • [Journal Article] Performance and characteristics of compressor/expander combination for C02 cycle2006

    • Author(s)
      Mitsuhiro Fukuta
    • Journal Title

      Proc. of 7th IIR-Gustav Lorentzen Conf. 0n Natural Working Fluids

      Pages: 52-52

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Performance of Scroll expander for C02 Refrigeration Cycle2006

    • Author(s)
      Mitsuhiro Fukuta
    • Journal Title

      Proc. of 18th Int. Compressor conference at Purdue

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] PERFORMANCE OF C02 REFRIGERATION CYCLE USING COMPRESSOR/EXPANDER COMBINATION2006

    • Author(s)
      Seiji Nakaya
    • Journal Title

      Proc. of JSSUME 2006

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] INFLUENCE OF OIL SUPPLYING METHOD ON PERFORMANCE OF C02 VANE TYPE EXPANDER2006

    • Author(s)
      Tomoaki Ogiso
    • Journal Title

      Proc. of JSSUME 2006

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Performance and characteristics of compressor/expander combination for CO2 cycle2006

    • Author(s)
      Mitsuhiro Fukuta
    • Journal Title

      Proc. of 7th IIR-Gustav Lorentzen Conf. on Natural Working Fluids 52

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Performance of Scroll expander for CO2 Refrigeration Cycle2006

    • Author(s)
      Mitsuhiro Fukuta
    • Journal Title

      Proc. of 18th Int. Compressor conference at Purdue C109

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] PERFORMANCE OF CO2 REFRIGERATION CYCLE USING COMPRESSOR/EXPANDER COMBINATION2006

    • Author(s)
      Seiji Nakaya
    • Journal Title

      Proc. of JSSUME 2006 TF07

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] INFLUENCE OF OIL SUPPLYING METHOD ON PERFORMANCE OF CO2 VANE TYPE EXPANDER2006

    • Author(s)
      Tomoaki Ogiso
    • Journal Title

      Proc. of JSSUME 2006 TF06

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Performance and characteristics of compressor/expander combination for CO2 cycle2006

    • Author(s)
      Mitsuhiro Fukuta
    • Journal Title

      Proc. of 7th IIR-Gustav Lorentzen Conf. on Natural Working Fluids

      Pages: 52-52

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Performance of Scroll expander for CO2 Refrigeration Cycle2006

    • Author(s)
      Mitsuhiro Fukuta
    • Journal Title

      Proc. of 18th Int. Compressor conference at Purdue

    • Related Report
      2006 Annual Research Report
  • [Journal Article] PERFORMANCE OF CO2 REFRIGERATION CYCLE USING COMPRESSOR/EXPANDER COMBINATION2006

    • Author(s)
      Seiji Nakaya
    • Journal Title

      Proc. of JSSUME 2006

    • Related Report
      2006 Annual Research Report
  • [Journal Article] INFLUENCE OF OIL SUPPLYING METHOD ON PERFORMANCE OF CO2 VANE TYPE EXPANDER2006

    • Author(s)
      Tomoaki Ogiso
    • Journal Title

      Proc. of JSSUME 2006

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 二酸化炭素用スクロール膨張機の性能2005

    • Author(s)
      小須田 修
    • Journal Title

      2005年度日本冷凍空調学会年次大会講演論文集

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] 二酸化炭素冷凍サイクル用膨張機内の漏れ流動特性2005

    • Author(s)
      金 春日
    • Journal Title

      熱工学コンファレンス講演論文集 No. 05-17

      Pages: 1-1

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Performance of carbon dioxide scroll expander2005

    • Author(s)
      Osamu Kosuda
    • Journal Title

      Proc. of the 2005 JSRAE annual conf. C316

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Leakage characteristics in expander for CO refrigeration cycle2005

    • Author(s)
      Jin Chun Ri
    • Journal Title

      Proc. of thermal engineering conf. 1

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 二酸化炭素冷凍サイクル用膨張機内の漏れ流動特性2005

    • Author(s)
      金 春日
    • Journal Title

      熱工学コンファレンス講演論文集 No.05-17

      Pages: 2-2

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Characteristics of trans-critical CO2 vane expander

    • Author(s)
      Mitsuhiro Fukuta
    • Journal Title

      Int. J of Refrigeration, Submitted

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Operating characteristics of expander/compressor combination for carbon dioxide refrigeration cycle

    • Author(s)
      Mitsuhiro Fukuta
    • Journal Title

      Trans. of JSRAE, Submitted

    • NAID

      10019952088

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Characteristics of trans-critical CO2 vane expander

    • Author(s)
      Mitsuhiro Fukuta
    • Journal Title

      Int. J of Refrigeration (投稿中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 二酸化炭素冷凍サイクルにおける膨張/圧縮機の運転特性

    • Author(s)
      福田 充宏
    • Journal Title

      日本冷凍空調学会論文集 (投稿中)

    • NAID

      10019952088

    • Related Report
      2006 Annual Research Report
  • [Patent(Industrial Property Rights)] 冷凍サイクル装置および膨張機2006

    • Inventor(s)
      福田充宏, 柳沢正, 鶸田晃, 森本敬, 澤井清
    • Industrial Property Rights Holder
      松下電器産業(株)
    • Industrial Property Number
      2006-048989
    • Filing Date
      2006-02-24
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Patent(Industrial Property Rights)] 圧縮機2006

    • Inventor(s)
      福田充宏, 柳沢正, 鶸田晃, 森本敬, 澤井清
    • Industrial Property Rights Holder
      松下電器産業(株)
    • Industrial Property Number
      2006-048990
    • Filing Date
      2006-02-24
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Patent(Industrial Property Rights)] 膨張機2005

    • Inventor(s)
      福田充宏, 柳沢正, 鶸田晃, 森本敬, 澤井清
    • Industrial Property Rights Holder
      静岡大学, 松下電器産業(株)
    • Industrial Property Number
      2005-084359
    • Filing Date
      2005-03-23
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Patent(Industrial Property Rights)] 膨張機2005

    • Inventor(s)
      福田 充宏, 柳沢 正, 鶸田 晃, 森本 敬, 澤井 清
    • Industrial Property Rights Holder
      静岡大学, 松下電器産業(株)
    • Filing Date
      2005-03-23
    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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