NUMERICAL INVESTIGATION OF HFC-134a FLOW THROUGH ADIABATIC SPIRAL CAPILLARY TUBES
This paper is an attempt to model the flow of refrigerant R-134a through the adiabatic capillary tubes used in residential air conditioners. The two types of adiabatic capillary tubes, viz., straight and spiral adiabatic capillary tubes, have been modeled. The present model is based on homogenous two-phase flow model. The proposed model predicts the length of the adiabatic capillary tubes as a function of refrigerant mass flow rate, capillary tube diameter, degree of sub-cooling, internal surface roughness and the pitch of Archimedean spiral. All the thermo-physical and transport properties of the refrigerants are evaluated by REFPROP 7 database. The simulation results are validated with the experimental findings of the previous researchers. The performances of the two geometries are compared and it is established that for the same conditions at the inlet and exit of the capillary, spiral capillary is found to have a shorter length.
Mohd.KALEEM KHAN Ravi KUMAR Pradeep KUMAR SAHOO
Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee,Roorkee-247 667, Uttarakhand, India
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）