International Journal of Mechanical Engineering

1-14

Authors: K.K.MATRAWY

The present study is concerned about a mathematical model developed, to study the performance of a truncated cone solar heater (TCSH), connected by a multi effect still (MES). The proposed TCSH included: a glass cover, truncated cone reflector, and a blackened vessel. The truncated cone shape is used as a reflector without a continuous tracking, where one half is always facing to the sun for the whole day hours. The effective area of the glass cover through which, the transmitted radiation is reflected to the vessel, derived as a function of the solar incidence angle and the geometry of the conical surface. The ratio of the vessel radius of the glass cover one is studied as a design parameter. The final results showed that an acceptable productivity from the MES with a maximum value of 0.97 kg/hr-m2 at noon times can be obtained. Also, the productivity of MES decreases by about 38 % as the ratio of vessel radius to the cover one increases by three times.

27-34

Authors: A. Chennakesava Reddy

The aluminum 3003 alloy is used in manufacturing of cooking utensils, pressure vessels, ice cube trays, refrigerator panels, heat exchangers, etc. In recent years, hexagonal boron nitride has been focused as a filler material for the metal matrix composites used for low or high temperature applications. Micromechanical properties were analyzed for the BN/3003 Al alloy nanocomposites using ANSYS software code. The major conclusion of the present work is that the interphase between BN nanoparticle and 3003 Al alloy has been found to be the weakest zone either low or high temperature operating conditions.