CO<Sub>2</Sub>/DME混合冷媒を用いたヒートポンプサイクルの性能解析

Translated title of the contribution: Performance Analysis of heat pump cycle using CO<Sub>2</Sub>/DME refrigerant mixture

尾中 洋次, 宮良 明男, 椿 耕太郎, 小山 繁

    Research output: Contribution to journalArticle

    Abstract

    Performance analyses have been carried out for a heat pump cycle using zeotropic refrigerant mixtures of carbon dioxide (CO<Sub>2</Sub>) and dimethyl ether (DME). In order to clarify the characteristics and coefficient of performance (COP) of CO<Sub>2</Sub>/DME heat pump cycle, the concentration of mixture was varied over a wide range. The calculation conditions were established as a hot-water supply system and the calculations were conducted by considering the heat transfer between the refrigerant and heat source/sink water. Because the heat transfer between refrigerant and heat source/sink water strongly affects on the cycle behavior, effects of the heat transfer capability parameter were investigated. The heat pump cycle is formed around the critical point for high CO<Sub>2</Sub> concentration mixtures and it is formed under the critical point for low CO<Sub>2</Sub> concentration mixtures. The COP has the maximum at a certain pressure for each mixture and the COPs of the mixture and pure DME are higher than that of pure CO<Sub>2</Sub>. Operating pressure decreases with increase of DME concentration. The effects of heat transfer between the refrigerant and heat source/sink water on characteristics of the cycle have also been clarified.
    Original languageJapanese
    Pages (from-to)245-252
    Number of pages8
    Journal日本冷凍空調学会論文集
    Volume26
    Issue number3
    DOIs
    Publication statusPublished - 2009

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    Refrigerants
    Ethers
    Pumps
    Heat transfer
    Hot water distribution systems
    Water
    Hot Temperature
    Carbon dioxide

    Cite this

    CO<Sub>2</Sub>/DME混合冷媒を用いたヒートポンプサイクルの性能解析. / 尾中洋次; 宮良明男; 椿耕太郎; 小山繁.

    In: 日本冷凍空調学会論文集, Vol. 26, No. 3, 2009, p. 245-252.

    Research output: Contribution to journalArticle

    尾中洋次 ; 宮良明男 ; 椿耕太郎 ; 小山繁. / CO<Sub>2</Sub>/DME混合冷媒を用いたヒートポンプサイクルの性能解析. In: 日本冷凍空調学会論文集. 2009 ; Vol. 26, No. 3. pp. 245-252.
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    abstract = "Performance analyses have been carried out for a heat pump cycle using zeotropic refrigerant mixtures of carbon dioxide (CO<Sub>2) and dimethyl ether (DME). In order to clarify the characteristics and coefficient of performance (COP) of CO<Sub>2/DME heat pump cycle, the concentration of mixture was varied over a wide range. The calculation conditions were established as a hot-water supply system and the calculations were conducted by considering the heat transfer between the refrigerant and heat source/sink water. Because the heat transfer between refrigerant and heat source/sink water strongly affects on the cycle behavior, effects of the heat transfer capability parameter were investigated. The heat pump cycle is formed around the critical point for high CO<Sub>2 concentration mixtures and it is formed under the critical point for low CO<Sub>2 concentration mixtures. The COP has the maximum at a certain pressure for each mixture and the COPs of the mixture and pure DME are higher than that of pure CO<Sub>2. Operating pressure decreases with increase of DME concentration. The effects of heat transfer between the refrigerant and heat source/sink water on characteristics of the cycle have also been clarified.",
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    AU - 椿, 耕太郎

    AU - 小山, 繁

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    AB - Performance analyses have been carried out for a heat pump cycle using zeotropic refrigerant mixtures of carbon dioxide (CO<Sub>2) and dimethyl ether (DME). In order to clarify the characteristics and coefficient of performance (COP) of CO<Sub>2/DME heat pump cycle, the concentration of mixture was varied over a wide range. The calculation conditions were established as a hot-water supply system and the calculations were conducted by considering the heat transfer between the refrigerant and heat source/sink water. Because the heat transfer between refrigerant and heat source/sink water strongly affects on the cycle behavior, effects of the heat transfer capability parameter were investigated. The heat pump cycle is formed around the critical point for high CO<Sub>2 concentration mixtures and it is formed under the critical point for low CO<Sub>2 concentration mixtures. The COP has the maximum at a certain pressure for each mixture and the COPs of the mixture and pure DME are higher than that of pure CO<Sub>2. Operating pressure decreases with increase of DME concentration. The effects of heat transfer between the refrigerant and heat source/sink water on characteristics of the cycle have also been clarified.

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