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 journal › Article
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.
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.",
author = "洋次 尾中 and 明男 宮良 and 耕太郎 椿 and 繁 小山",
year = "2009",
doi = "10.11322/tjsrae.26.245",
language = "Japanese",
volume = "26",
pages = "245--252",
journal = "日本冷凍空調学会論文集",
issn = "1344-4905",
publisher = "公益社団法人 日本冷凍空調学会",
number = "3",
}
TY - JOUR
T1 - CO<Sub>2/DME混合冷媒を用いたヒートポンプサイクルの性能解析
AU - 尾中, 洋次
AU - 宮良, 明男
AU - 椿, 耕太郎
AU - 小山, 繁
PY - 2009
Y1 - 2009
N2 - 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.
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.