BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Heat capacity, Cp, of fluids from transient hot wire measurements

Participants in the publication
H.M. Roder (Author)
C.A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE

Summary
We report here the first thermal diffusivity measurements that cover a wide range of thermodynamic states including the dilute gas, the dense gas, the compressed liquid, and conditions close to the critical point. The heat capacity is obtained from simultaneous measurements of thermal conductivity and thermal diffusivity in a transient hot wire instrument, while the density is obtained from an equation of state. Values for the heat capacity, Cp, of argon were obtained at two temperatures, 172 and 275 K, with pressures up to 70 MPa. For these temperatures the densities range from that of the dilute gas to 2.2 times critical density while the heat capacity varies by a factor of seven from the dilute gas value.


Institution
INSTITUTO SUPERIOR TÉCNICO

Where published
Cryogenics

Publication Identifiers

Publisher
Elsevier BV



Document Identifiers
DOI - https://doi.org/10.1016/0011-2275(87)90060-9
URL - http://dx.doi.org/10.1016/0011-2275(87)90060-9

Keywords
Nitrogen Thermal Conductivity: Thermal Diffusivity Heat Capacity: Transient Hot-wire Technique Low Temperatures High Pressures

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