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

该项目旨在使用二氧化碳制冷剂ixtures作为工作流体来贡献高性能压缩热泵/制冷系统。系统由hermetrism型板条蒸发器组成如下：（1）研究了性能共同的制冷剂组成，热源和散热器条件，并阐明了使用沸石制冷剂的COP的必要COR改善），是热力学特性和二氧化碳冷凝剂的热力学特性和热力学特性混合物。对蒸发热传递的粉末式蒸发剂，测试了几种试验的液体分配器。在质量速度G = 28-70 kg/（M2 s）的范围内进行了测试。液体薄膜和液体模式也被阐明了纯制冷剂的倒置特征。纯制冷剂在平滑表面上的液体膜的方程与纯制冷剂的传热系数相比，根据质量分数和质量速度的量

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）。