Measurements of gaseous isobaric specific heat capacity of alternative refrigerants

Y. Ikeya; C. C. Piao; S. Yokota; H. Sato; K. Watanabe

doi:10.1016/0378-3812(92)87060-Z

Measurements of gaseous isobaric specific heat capacity of alternative refrigerants

Y. Ikeya, C. C. Piao, S. Yokota, H. Sato, K. Watanabe

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A new apparatus applying gas-flow calorimetry has been developed which enables to measure the isobaric specific heat, C_p, of superheated gaseous fluids with high accuracy at temperatures up to 473 K and pressures up to 10 MPa. The experimental uncertainties in temperature, pressure, and C_p measurements are estimated being not greater than ± 5 mK, ± 4 kPa and ± 0.26 %, respectively. Four C_p values of gaseous HCFC-22 have been measured and compared with available data measured by Bier et al. (1974) and Ernst and Busser (1970) for examining the reliability of the apparatus, and four C_p values of the new refrigerant HFC-134a have also been measured and discussed concerning the ideal-gas specific heat by comparing with C_p values derivrd from sound velocity measurements, spectroscopic measurements or existing equation of state for HFC-134a.

Original language	English
Pages (from-to)	119-129
Number of pages	11
Journal	Fluid Phase Equilibria
Volume	80
Issue number	C
DOIs	https://doi.org/10.1016/0378-3812(92)87060-Z
Publication status	Published - 1992 Nov 30
Externally published	Yes

Keywords

HCFC-22
HFC-134a
alternative refrigerants
flow calorimetry
isobaric specific heat at ideal gas condition.
isobaric specific heat capacity

ASJC Scopus subject areas

Chemical Engineering(all)
Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1016/0378-3812(92)87060-Z

Cite this

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title = "Measurements of gaseous isobaric specific heat capacity of alternative refrigerants",

abstract = "A new apparatus applying gas-flow calorimetry has been developed which enables to measure the isobaric specific heat, Cp, of superheated gaseous fluids with high accuracy at temperatures up to 473 K and pressures up to 10 MPa. The experimental uncertainties in temperature, pressure, and Cp measurements are estimated being not greater than ± 5 mK, ± 4 kPa and ± 0.26 %, respectively. Four Cp values of gaseous HCFC-22 have been measured and compared with available data measured by Bier et al. (1974) and Ernst and Busser (1970) for examining the reliability of the apparatus, and four Cp values of the new refrigerant HFC-134a have also been measured and discussed concerning the ideal-gas specific heat by comparing with Cp values derivrd from sound velocity measurements, spectroscopic measurements or existing equation of state for HFC-134a.",

keywords = "HCFC-22, HFC-134a, alternative refrigerants, flow calorimetry, isobaric specific heat at ideal gas condition., isobaric specific heat capacity",

author = "Y. Ikeya and Piao, {C. C.} and S. Yokota and H. Sato and K. Watanabe",

year = "1992",

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doi = "10.1016/0378-3812(92)87060-Z",

language = "English",

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pages = "119--129",

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TY - JOUR

T1 - Measurements of gaseous isobaric specific heat capacity of alternative refrigerants

AU - Ikeya, Y.

AU - Piao, C. C.

AU - Yokota, S.

AU - Sato, H.

AU - Watanabe, K.

PY - 1992/11/30

Y1 - 1992/11/30

N2 - A new apparatus applying gas-flow calorimetry has been developed which enables to measure the isobaric specific heat, Cp, of superheated gaseous fluids with high accuracy at temperatures up to 473 K and pressures up to 10 MPa. The experimental uncertainties in temperature, pressure, and Cp measurements are estimated being not greater than ± 5 mK, ± 4 kPa and ± 0.26 %, respectively. Four Cp values of gaseous HCFC-22 have been measured and compared with available data measured by Bier et al. (1974) and Ernst and Busser (1970) for examining the reliability of the apparatus, and four Cp values of the new refrigerant HFC-134a have also been measured and discussed concerning the ideal-gas specific heat by comparing with Cp values derivrd from sound velocity measurements, spectroscopic measurements or existing equation of state for HFC-134a.

AB - A new apparatus applying gas-flow calorimetry has been developed which enables to measure the isobaric specific heat, Cp, of superheated gaseous fluids with high accuracy at temperatures up to 473 K and pressures up to 10 MPa. The experimental uncertainties in temperature, pressure, and Cp measurements are estimated being not greater than ± 5 mK, ± 4 kPa and ± 0.26 %, respectively. Four Cp values of gaseous HCFC-22 have been measured and compared with available data measured by Bier et al. (1974) and Ernst and Busser (1970) for examining the reliability of the apparatus, and four Cp values of the new refrigerant HFC-134a have also been measured and discussed concerning the ideal-gas specific heat by comparing with Cp values derivrd from sound velocity measurements, spectroscopic measurements or existing equation of state for HFC-134a.

KW - HCFC-22

KW - HFC-134a

KW - alternative refrigerants

KW - flow calorimetry

KW - isobaric specific heat at ideal gas condition.

KW - isobaric specific heat capacity

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U2 - 10.1016/0378-3812(92)87060-Z

DO - 10.1016/0378-3812(92)87060-Z

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SN - 0378-3812

VL - 80

SP - 119

EP - 129

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

IS - C

ER -

Measurements of gaseous isobaric specific heat capacity of alternative refrigerants

Abstract

Keywords

ASJC Scopus subject areas

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