Netsu Bussei
Online ISSN : 1881-414X
Print ISSN : 0913-946X
ISSN-L : 0913-946X
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Volume 2, Issue 2
Displaying 1-7 of 7 articles from this issue
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  • International comparisons of the pressure standards
    Shojiro Yamamoto
    1988 Volume 2 Issue 2 Pages 75-79
    Published: October 15, 1988
    Released on J-STAGE: March 16, 2010
    DOIhttps://doi.org/10.2963/jjtp.2.75
    JOURNAL FREE ACCESS
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    These days, international comparisons of the pressure standards are being made over a wide range from high pressure to very low pressure under the support of BIPM. Here described are the states of progress and the results of those comparisons using dead-weight piston gauges as the transfer gauges in barometric region (10-110kPa) and high pressure region (20-100MPa).
    The agreements were within several ppm at 100kPa, and 40ppm for the most of the 13 countries participated at 100MPa.
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  • Thermal Properties of Materials at Low Temperatures
    from the user's standpoint
    H. Ogata
    1988 Volume 2 Issue 2 Pages 80-83
    Published: October 15, 1988
    Released on J-STAGE: March 16, 2010
    DOIhttps://doi.org/10.2963/jjtp.2.80
    JOURNAL FREE ACCESS
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    With the progress of superconducting application technology and space development, the collection, evaluation and measurement of various thermal property data at low temperatures become important. In this short paper, thermal properties of fluids and solids suitable for cryogenic use are reviewed including some topics.
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  • Two Releases Recently Issued by the IAPS
    M. Uematsu
    1988 Volume 2 Issue 2 Pages 84-88
    Published: October 15, 1988
    Released on J-STAGE: March 16, 2010
    DOIhttps://doi.org/10.2963/jjtp.2.84
    JOURNAL FREE ACCESS
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    The International Association for the Properties of Steam has issued recently two releases: one is a Supplementary Release on Saturation Properties of Ordinary Water Substance and the other is a Release on Surface Tension of Heavy Water Substance (D2O). The contents of these releases are reported here.
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  • Thermophysical Properties of Ice, Snow, and Sea Ice
    Shoichiro FUKUSAKO, Makoto TAGO, Masahiko YAMADA
    1988 Volume 2 Issue 2 Pages 89-100
    Published: October 15, 1988
    Released on J-STAGE: March 16, 2010
    DOIhttps://doi.org/10.2963/jjtp.2.89
    JOURNAL FREE ACCESS
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    The present paper reviews and discusses the data and information on the thermophysical properties of ice, snow, and sea ice. These properties include thermal conductivity, specific heat, density, thermal diffusivity, latent heat of fusion, thermal expansion, and absorption coefficient. The available data are graphed to make them easier to use with the recommended correlation equation as completely as possible. Theoretical models are extensively discussed that can predict the thermal conductivity of snow in terms of thermal conductivity of ice and equivalent thermal conductivity of air incorporating the contribution of water-vapor diffusion.
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  • Ultrasonic speeds in liquids under high pressures and their thermophysical properties
    Toshiharu Takagi
    1988 Volume 2 Issue 2 Pages 101-110
    Published: October 15, 1988
    Released on J-STAGE: March 16, 2010
    DOIhttps://doi.org/10.2963/jjtp.2.101
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    Ultrasonic speed in fluids is an important physical property, which is closely related to the thermophysical quantities. In previous works, authors reported on the ultrasonic speed u in organic liquids, their binary mixtures and liquid fluorocarbon refrigerants which were measured from 283 to 373K and from 0.1MPa or vapor pressure to 200MPa. Densities under high pressure were estimated from experimental results with reasonable accuracy by use of the pressure dependency of u. From these values, various thermophysical properties for these liquids were obtained. This paper reviews the temperature, pressure and composition effects on speeds and the derived quantities.
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  • Correlation of Vapor-Pressures for Alkanes and Alkylbenzenes Using Molecular Connectivity
    Akihiro Sakoguchi, Yoshio Iwai, Shuji Yamamoto, Yasuhiko Arai
    1988 Volume 2 Issue 2 Pages 111-114
    Published: October 15, 1988
    Released on J-STAGE: March 16, 2010
    DOIhttps://doi.org/10.2963/jjtp.2.111
    JOURNAL FREE ACCESS
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    The AMP (Abrams-Massaldi-Prausnitz) equation based on a kinetic theory of fluids was applied to calculate the vapor pressures for alkanes (C2-C18) and alkylbenzenes (C6-C18). The parameters in the AMP equation were correlated by the molecular connectivity which was introduced to consider the structure of molecules and the influence of number of side chains. The vapor pressures of alkanes and alkylbenzenes, in the 10 to 1500mmHg region, could be correlated with absolute average error less than 10% by using the AMP equation coupled with the molecular connectivity.
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  • The Data Base of Thermophysical Properties
    K. Takeuchi
    1988 Volume 2 Issue 2 Pages 115-116
    Published: October 15, 1988
    Released on J-STAGE: March 16, 2010
    DOIhttps://doi.org/10.2963/jjtp.2.115
    JOURNAL FREE ACCESS
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