Cycle analysis and heat transfer characteristics of a heat pump using R22/R142b refrigerant mixtures
DC Field | Value | Language |
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dc.contributor.author | Tong Shop Kim | - |
dc.contributor.author | Jee Young Shin | - |
dc.contributor.author | Min Soo Kim | - |
dc.contributor.author | Sung Tack Ro | - |
dc.date.accessioned | 2022-04-19T14:04:01Z | - |
dc.date.available | 2022-04-19T14:04:01Z | - |
dc.date.issued | 1994-07 | - |
dc.identifier.issn | 0140-7007 | - |
dc.identifier.issn | 1879-2081 | - |
dc.identifier.uri | https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/150953 | - |
dc.description.abstract | A heat pump system is studied to evaluate its performance and heat transfer bharacteristics by adopting mixtures of R22/R142b as working fluids. Heat transfer coefficient in the evaporator and overall performance are measured and analysed in terms of compositions and relevant variables. The possibility is observed of capacity modulation within 200% (based on minimum capacity) by varying the composition without degradation of heat transfer effectiveness and coefficient of performance (COP). At a fixed evaporating capacity, COP is improved by using refrigerant mixtures, and shows its maximum at 60% mass fraction of R22. Local heat transfer coefficients are measured in the evaporator to identify the heat transfer characteristics. A similar mass flow rate and evaporating heat transfer rate, the average heat transfer coefficient for mixtures are lower than those for pure refrigerants. A cycle simulation taking the heat exchange process into consideration demonstrates the advantages of using refrigerant mixtures. Local heat transfer coefficientsduring evaporation are correlated with non-dimensional parameters, and reasonable agreement is obtained. | - |
dc.description.abstract | Onévalue les performances d'une pompeàchaleur fonctionnant avec un mélange R22/R142b, et particulièrement les conditions d'éxchange de chaleur dans l'évaporateur. On observe la possibilitéde moduler la puissanceàl'intérieur de 200% (basésur la puissance minimale) en variant la composition du mélange et sans dégrader le rendement de transfert de chaleur, ni le coefficient de performances (COP). Pour une puissance d'évaporation donnée, l'utilisation de mélanges de frigorigénes améliore le COP, qui plafonne pour une fraction massique de R22 de 60%. On mesure les coefficients de transfert de chaleur locaux dans l'évaporateur pour déterminer les caractéristiques de transfert de chaleur. Pour un débit-masse et un taux de transfert de chaleur parévaporation proches, les coefficients de transfert de chaleur moyens des mélanges sont moinsélevés que ceux des frigorigénes purs. Une simulation du cycle, incluant l'influence deséchanges de chaleur, montre les avantages de l'utilisation des mélanges de frigorigénes. Onétablit cne corrélation entre les coefficients de transfert de chaleur locaux lors de l'evaporation et les paramètres sans dimension, et on obtient un accord acceptable. | - |
dc.format.extent | 9 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | Elsevier BV | - |
dc.title | Cycle analysis and heat transfer characteristics of a heat pump using R22/R142b refrigerant mixtures | - |
dc.title.alternative | Analyse du cycle et caractéristiques de transfert de chaleur d'une pompeàchaleur fonctionnant au mélange de frigorigènes R22/R142b | - |
dc.type | Article | - |
dc.publisher.location | 영국 | - |
dc.identifier.doi | 10.1016/0140-7007(94)90074-4 | - |
dc.identifier.scopusid | 2-s2.0-0028465715 | - |
dc.identifier.wosid | A1994NQ60000005 | - |
dc.identifier.bibliographicCitation | International Journal of Refrigeration, v.17, no.6, pp 391 - 399 | - |
dc.citation.title | International Journal of Refrigeration | - |
dc.citation.volume | 17 | - |
dc.citation.number | 6 | - |
dc.citation.startPage | 391 | - |
dc.citation.endPage | 399 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/abs/pii/0140700794900744 | - |
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