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http://dx.doi.org/10.5762/KAIS.2010.11.2.449

Flow Characteristics of R600a in an Adiabatic Capillary Tube  

Ku, Hak-Geun (Division of Refrigeration and Air-Conditioning Eng., TongMyong University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.11, no.2, 2010 , pp. 449-454 More about this Journal
Abstract
In this paper, flow characteristics of R600a in an adiabatic capillary tube were investigated employing the homogeneous flow model. The model is based on fundamental equations of mass, energy and momentum which are solved simultaneously. Two friction factors(Churchill) and viscosity(McAdams) are comparatively used to investigate the flow characteristics. Thermodynamic and transport properties of R600a are calculated employing EES property code. Flow characteristics analysis of R600a in an adiabatic capillary tube is presented to offer the basic design data for the operating parameters. The operating parameters considered in this study include condensation temperature, evaporation temperature, subcooling degree and inner diameter tube of the adiabatic capillary tube. The main results were summarized as follows: condensation and evaporation temperature, inlet subcooling degree and inner diameter tube of an adiabatic capillary tube using R600a have an effect on length of an adiabatic capillary tube. The length of an adiabatic capillary tube using R600a is expressed to the correlation shown in Eq. (15).
Keywords
Adiabatic capillary tube; R600a; Flow characteristics; Vapor compression system;
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