Flow characteristics of refrigerants flowing through capillary tubes – A review
Flow characteristics of refrigerants flowing through capillary tubes – A review
. 2009. India
Indonesia
Artikel
A comprehensive review of the literature on the flow of various refrigerants through the capillary tubes of
different geometries viz. straight and coiled and flow configurations viz. adiabatic and diabatic, has been
discussed in this paper. The paper presents in chronological order the experimental and numerical investigations
systematically under different categories. Flow aspects like effect of coiling and effect of oil in the
refrigerants on the mass flow rate through the capillary tube have been discussed. Furthermore, the phenomenon
of metastability and the correlations to predict the underpressure of vaporization have also been
discussed. The paper provides key information about the range of input parameters viz. tube diameter, tube
length, surface roughness, coil pitch and coil diameter, inlet subcooling and condensing pressure or temperature.
Other information includes type of refrigerants used, correlations proposed and methodology
adopted in the analysis offlowthrough the capillary tubes of different geometries operating under adiabatic
and diabatic flow conditions. It has been found from the review of the literature that there is a lot more to
investigate for the flow of various refrigerants through different capillary tube geometries
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