2022 Fiscal Year Final Research Report
Development of a high performance heat exchanger for low temperature environmental heat pumps using micro airfoil tubes
| Project/Area Number |
20K04324
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19020:Thermal engineering-related
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| Research Institution | Kanazawa University |
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Principal Investigator |
Onishi Hajime 金沢大学, 機械工学系, 助教 (80334762)
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| Co-Investigator(Kenkyū-buntansha) |
多田 幸生 金沢大学, 機械工学系, 教授 (20179708)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 熱交換器 / 冷凍・空調 / 翼型チューブ / 着霜低減 / 吸着剤 |
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| Outline of Final Research Achievements |
To improve the performance and energy efficiency of heat pumps, frost reduction of heat exchangers in low temperature environments is an important issue. Therefore, this study investigates frost reduction techniques for heat exchangers in low temperature environments. In particular, the effects of water vapor adsorption on the adsorbent at freezing temperatures on the frost behavior are investigated for both the air and refrigerant sides of an adsorbent-coated micro airfoil-tube heat exchanger to improve the heat transfer performance of the heat exchanger. In addition, a detailed study of phase change heat transfer in small diameter channels on the refrigerant side is conducted to gain insight into high performance heat exchangers for heat pumps for low temperature environments.
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| Free Research Field |
熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
着霜現象は，学術的・社会的に極めて重要な現象であるが，それに対する物理的な理解は十分とは言えず，着霜低減技術の確立は重要課題である．本研究では，伝熱面における吸着剤による直接水蒸気除去の観点から着霜低減を試み，水蒸気が吸着と着霜に分かれるメカニズムを追究することに学術的意義がある．また，本研究の成果を用いれば，既往の研究よりも耐着霜性に優れたコンパクトで高性能なヒートポンプの開発に繋がるなど，大きな波及効果が期待できる点で社会的意義がある．
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