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International Journal of Civil, Mechanical and Energy Science

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CFD Parametric Investigation for Two Phase Flow of Refrigerant 134a In an Adiabatic Capillary tube( Vol-2,Issue-2,March 2016 )

Author(s):

Mohd Salman Saifi, Dr. OP Jakhar, Nasim Hasan

Keywords:

Computational Fluid Dynamics, Finite Volume Method, Implicit Method, Refrigerant, Two Phase Flow.

Abstract:

Capillary tubes are widely used as refrigerant flow control device in a small refrigeration systems. Since the flow behavior inside a capillary tube is complex, several physical models are necessary to predict the characteristics of refrigerant flow in the capillary tube. A refrigerant leaves the compressor at high pressure & temperature and enters the condenser. After leaving the condenser the refrigerant is at medium temperature & high pressure and then it enters the Capillary tube. In a Capillary tubes the pressure and the temperature of a refrigerant is reduced drastically and suddenly. Thus us it is a throttling valve where the temperature of the refrigerant is reduced and it is then able to produce the cooling effect in evaporator of the refrigerator or cooling coil of the air conditioner. In the present investigation, an attempt is made to analyze the two phase flow of the refrigerant 134a inside a helical capillary tube for adiabatic flow conditions. First of all a validation of Liang and Wong 2001 is made to analyze. The proposed model investigate flow characteristics in adiabatic capillary tubes for a given mass flow rate. In the present study 134a has been used as a working fluid inside the helical capillary tube of diameter 0.66 mm and used the same model to study the flow characteristics of refrigerant in ANSYS FLUENT software.

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References:

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