Theoretical Design of adiabatic capillary tube of （理论设计的绝热毛细管）.pdf

American Journal of Engineering Research (AJER) 2014 American Journal of Engineering Research (AJER) e-ISSN : 2320-0847 p-ISSN : 2320-0936 Volume-03, Issue-05, pp-306-314 Research Paper Open Access Theoretical Design of adiabatic capillary tube of a domestic refrigerator using refrigerant R-600a. 1 2 Sahoo. K. C , Das. S. N 1(Mech. Dept, BEC,BBSR/ BPUT, Odisha, India) 2 (Mech. Dept , ITER, BBSR/ S.O.A. University, Odisha , India) Abstract: - This paper develops a more accurate theoretical procedure for the design of adiabatic capillary tube of a domestic refrigerator considering a rigorous pressure drop analysis on the refrigerant R-600a while expanding through that tube accompanied with phase change through flash vaporization. Here this eliminates the contradiction of existing concepts on the negative value of the frictional pressure drop after a sh ort distance of expansion due to a large part contribution of the actual pressure drop towards the momentum gain pressure drop. Also this verifies that the momentum gain through phase change is by consumption of internal energy part of the enthalpy and no part of the actual pressure drop energy is used in this respect. So with the concept of nearly total pressure drop