Development of a High Performance Heat Pump System Using Refrigerant Mixtures as Working Fluids

使用制冷剂混合物作为工作流体的高性能热泵系统的开发

• 批准号: 04555049
• 负责人: FUJII Tetsu
• 金额: $ 8.64万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555049/
• 关键词: Heat pump system; Plate-fin evaporator; Plate-fin condenser; Zeotropic refrigerant mixtures; Cycle Performance; Coefficient of Performance; Flow Pattern; Heat transfer characteristics; ヒ-トポンプ; プレ-トフィン蒸発器; プレ-トフィン凝縮器; 代替フロン冷媒; サイクル特性

This project aims to contribute the development of high-performance vapor compression heat pump/ refrigeration systems using zeotropic refrigerant mixtures as working fluids. In this project the cycle performance was investigated experimentally for two kinds of mixtures of HFC134a/HCFC123 and HCFC22/CFC114 using a vapor compression heat pump system, which consisted of a hermetic type compressor, a vertical plate-fin condenser, an expansion value and a falling-film type plate-fin evaporator. The characteristics of heat transfer and flow pattern of refrigerant condensing and evaporating in plate-fin heat exchangers were also tested in wide ranges of heat flux and mass velocity. The results obtained are as follows :(1) Cycle PerformanceThe effect of the refrigerant composition, heat source and heat sink conditions on the coefficient of performance was investigated, and the necessary conditions for improvement in the COP by using zeotropic refrigerant mixtures was clarified ; the optimum c … More ondition is determined by the thermodynamic properties and the heat transfer performance of zeotropic refrigerant mixtures.(2) Heat Transfer of Zeotropic Refrigerant Mixture in A Falling-film-type Plate-fin EvaporatorPrior to the experiment on the evaporation heat transfer, several kinds of trial liquid distributors were tested, and the method to distribute the refrigerant liquid uniformly in an falling-film type evaporator was founded. The test evaporator was manufactured and tested in the range of mass velocity G=28-70 kg/(m2 s). From the observation, the flow patterns were classified into five typical types : plane liquid film, wavy liquid film, liquid film with dry patch, liquid film with dripping and liquid film with mists. Then, the relation between the heat transfer and the flow pattern was clarified. The method to predict the heat transfer characteristics of pure and mixed refrigerants was also developed.(3) Heat Transfer of Zeotropic Refrigerant Mixture in A Plate-fin CondenserIt was founded that the heat transfer coefficients of pure refrigerants in a plate-fin condenser were about 10 times higher than the values predicted by a semi-empirical equation for falling liquid film of a pure refrigerant on a smooth surface, and the heat transfer coefficients of mixed refrigerants were lower than those of pure refrigerants depending on the mass fraction and the mass velocity. The method to predict the heat transfer characteristics of pure and mixed refrigerants was also developed. Less

该项目旨在使用二保易制冷剂混合物作为工作液来促进高性能蒸气压缩热泵/制冷系统的发展。在该项目中，使用蒸气压缩热泵系统的HFC134A/HCFC123和HCFC22/CFC114进行了两种混合，对周期性能进行了实验研究，该组合由垂直板块式冷凝器，扩展值和掉落式板板式贴片板式纤维 - 纤维型纤维型艾弗（Fillm type-Finm-Fin-Fin-Fin-Fin avaporator）组成。还测试了制冷剂冷凝和蒸发在板鳍热交换器中的传热和流动模式的特征。所获得的结果如下：（1）研究制冷剂组成，热源和散热器条件对性能核心的循环性能，并通过使用沸石制冷剂混合物来阐明COP改善COP的必要条件；最佳的C…更多的发作取决于热力学特性和偶氮性制冷剂混合物的热传递性能。（2）在落下的胶片型板岩板 - 薄膜 - 薄膜蒸发器中对偶然的液体蒸发剂的热传递在蒸发液体转移的实验中，对蒸发液体的分配，该方法是在试验中的几个分配，该方法是在试验中的几个方法，该方法是在试验液体中的几个方法，该方法是在试验中，该方法是在试验中，该方法是在试验中，该方法是在试验中，该方法是在方法中，该方法是在试验中，该方法是在方法中，该方法在液体中均可用来分配的方法，并且该方法是在方法中，并且该方法是在方法中，并且在降低的液体中，该方法远射了，该方法远射了，该方法是在效率的分布。建立了落叶型蒸发器。测试蒸发剂是在质量速度G = 28-70 kg/（m2 s）的范围内制造和测试的。从观察结果中，流动图案分为五种典型类型：平面液体膜，波浪状液体膜，带干斑的液体膜，带有干斑的液体膜，带有干膜的液体膜和带有薄雾的液体膜。然后，阐明了传热与流动模式之间的关系。还开发了预测纯制冷剂和混合制冷剂的传热特性的方法。（3）建立了板岩冷凝物中的二极管制冷剂混合物的热传递，确定，板岩冷凝器中纯制冷剂的纯制冷剂的热传递系数比半经验量的纯净液体效应的量相比，是纯净的液体效应的量高约10倍。制冷剂低于纯制冷剂，具体取决于质量分数和质量速度。还开发了预测纯制冷剂和混合制冷剂的传热特性的方法。较少的

项目成果

Tetsu, FUJII: "Empirical Equations to Predict Heat Transfer Coefficients for Condensation of Binary Vapor Mixtures" Proc. Int. Seminar on Heat Transfer, Thermophysical Properties and Cycle Performance of Alternative Refrigerants. 71-90 (1993)

Tetsu, FUJII：“预测二元蒸气混合物冷凝传热系数的经验方程”Proc。

屋良朝康,小山 繁,河本貴雄,藤井 哲: "混合冷媒HFC134a/HCFC123を用いた熱変換機システムの実験" 第31回日本伝熱シンポジウム講演論文集. (発表予定). (1994)

Tomoyasu Yara、Shigeru Koyama、Takao Kawamoto、Satoshi Fujii：“使用混合制冷剂 HFC134a/HCFC123 的热转换器系统的实验”第 31 届日本传热研讨会论文集（1994 年）。

T.FUJII: "Enhancement to Condensing Heat Transfer-New Developments" The proceedings of 1993 ICHMT Int.Symp.on New Developments in Heat Exchangers, Invited Lecture No.L4. (1993)

T.FUJII：“Enhancement to Condensing Heat Transfer-New Developments” 1993 ICHMT Int.Symp.on New Developments in Heat Exchangers 论文集，特邀讲座 No.L4。

Tetsu, FUJII: "Empirical Equations to Predict Heat Transfer Coefficients for Condensation of Binary Vapor Mixtures" Proc. Int. Seminar on Heat Transfer,Thermophysical Prpoerties and Cycle Performance of Alternative Refrigerants(掲載予定). (1994)

Tetsu, FUJII：“预测二元蒸气混合物冷凝传热系数的经验方程”Proc。替代制冷剂的传热、热物理特性和循环性能研讨会（即将出版）。

小山 繁,藤井 哲,屋良朝康,戸田一美: "プレートファン式熱交換器による混合冷媒熱変換機の性能向上" 第29回日本伝熱シンポジウム講演論文集. 547-548 (1992)

Shigeru Koyama、Tetsu Fujii、Tomoyasu Yara、Kazumi Toda：“使用板式风扇换热器提高混合制冷剂换热器的性能”第 29 届日本传热研讨会论文集 547-548（1992 年）。