Formation Conditions of Clathrates Between HFC Alternative Refrigerants and Water

International Journal of Thermophysics - Tập 20 Số 6 - Trang 1753-1763 - 1999
Akiya, T.1, Shimazaki, T.1, Oowa, M.1, Matsuo, M.2, Yoshida, Y.2
1National Institute of Materials and Chemical Research, Tsukuba, Ibaraki, Japan
2Human Environment Research Laboratory, Matsushita Electric Industrial Co., Ltd., Moriguchi, Osaka, Japan

Tóm tắt

There are two promising candidates as alternative refrigerants for air-conditioners and heat pumps. The first is R407C, which is composed of HFC-32 (23 mass%), HFC-125 (25 mass%), and HFC-134a (52 mass%). The second is R410A, which is composed of HFC-32 (50 mass%) and HFC-125 (50 mass%). In this study, formation conditions of clathrate compounds between water and HFC alternative refrigerants such as HFC-32, HFC-125, HFC-134a, and their mixtures, R407C and R410A, were investigated. Phase diagrams of clathrates of these HFC alternative refrigerants and their mixtures were determined. From the phase diagrams, the critical decomposition temperature and the critical decomposition pressure were determined. The relationship between the critical decomposition points for the clathrates of HFC-32, HFC-125, HFC-134a, R410A, and R407C were studied. It is found that R407C and R410A form clathrate compounds with water under the evaporating temperature condition in the refrigeration cycle of air-conditioners and heat pumps.

Từ khóa


Tài liệu tham khảo

ASHRAE Standard, ANSI/ASHRAE 34-1992 and Addenda (1995).

M. Matsuo, M. Tagashira, and Y. Yoshida, Proc. 17th Japan Symp. Thermophys. Prop. 227 (1996).

citation_inbook_title=Water, a Comprehensive Treatise; citation_publication_date=1973; citation_id=CR3; citation_author=D. W. Davidson; citation_publisher=Plenum

Allied-Signal, WO93/00412 (1993) and WO93/04139 (1993).

citation_journal_title=Proc. 25th IECEC; citation_author=M. Oowa, M. Nakaiwa, T. Akiya, H. Fukuura, K. Suzuki, M. Ohsuka; citation_volume=4; citation_publication_date=1990; citation_pages=269; citation_id=CR5

citation_journal_title=AIChE J.; citation_author=J. P. Lederhos, A. J. Mehta, G. B. Nyberg, K. J. Warn, E. D. Sloan; citation_volume=38; citation_publication_date=1992; citation_pages=1045; citation_doi=10.1002/aic.690380708; citation_id=CR6

citation_title=NIST Thermodynamic Properties of Refrigerants and Refrigerant Mixtures Database, NIST 23 (REFPROP), Version 5.0; citation_publication_date=1996; citation_id=CR7; citation_author=M. L. Huber; citation_author=J. S. Gallagher; citation_author=M. O. McLinden; citation_author=G. Morrison; citation_publisher=Nat. Inst. Stds. Tech.

citation_journal_title=Nature; citation_author=J. H. van der Waals, J. C. Platteeuw; citation_volume=183; citation_publication_date=1959; citation_pages=462; citation_doi=10.1038/183462a0; citation_id=CR8

citation_journal_title=AIChE J.; citation_author=A. J. Barduhn, H. E. Towlson, Y. C. Hu; citation_volume=8; citation_publication_date=1962; citation_pages=176; citation_doi=10.1002/aic.690080210; citation_id=CR9

Thông tin
Thông tin xuất bản

International Journal of Thermophysics

Tập 20 Số 6

1753-1763

Thông tin tác giả