Study of various heat transfer mechanism was one of the applicable experience. generally heat transfer obtain with three mechanism of Conduction, Convection and radiation. Each of them studied in individual module. Conduction in cylindrical and spherical coordination, Heat transfer in free and force convection,radiation in various wave length of emitted deal in different module.  In addition heat transfer in process of phase change  dealing on boiling and condensation module. Different heat exchanges device make such as double pipe,shell and tube and  plate module.