Abstract
The thermal diffusivity of R152a was measured by dynamic light scattering. We have developed an apparatus which enables us to apply both homodyne and heterodyne light-scattering techniques allowing a wide region of state to be investigated. A total of 300 data points was obtained along the critical isochore. in both coexisting phases and on seven isotherms with densities and temperatures ranging from 50 to 1000 kg·m−3 and 290 to 425 K, respectively. The uncertainty of the measurements lies between 0.5 and 5%. The thermal-diffusivity values cover a range of over four orders of magnitude and include the region around the vapor-liquid critical point. Other measured properties are temperature, pressure, and refractive index as well as the critical parametersT c andp c .
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Kruppa, B., Straub, J. Thermal diffusivity of the alternative refrigerant R152a. Int J Thermophys 18, 807–823 (1997). https://doi.org/10.1007/BF02575135
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DOI: https://doi.org/10.1007/BF02575135