Heat transfer  is  the  process  of  the  movement  of  energy  due  to  a  temperature  difference.    The calculations  are  interested in include determining the  final  temperatures of materials  and how long  it  takes for  these  materials  to  reach  these temperatures.   This can  help inform the  level  of insulation required to ensure heat is not lost from a system.  Typically, heat loss is proportional to a temperature gradient. Heat transfer is the process of the movement of energy due to a temperature difference. This paper is devoted to give a systematic introduction to a new passive cooling techy for solar cells, aiming to open a new opportunity for solar cells’ cooling. The calculations are interested in include determining the final temperatures of materials and how long it takes for these materials to reach these temperatures. This can help inform the level of insulation required to ensure heat is not lost from a system. Characteristically, heat loss is proportional to a temperature gradient. Heat transfer can be achieved by conduction, convection or radiation. Thermodynamics, along with thermal hydraulic analysis, deals with the transfer of heat to and from a working fluid and the performance of work by that fluid. Subsequently, the transfer of heat to a working fluid is central to thermodynamics, a short excursion into the techy of heat transfer is useful to tie thermodynamics to real-world devices. Heat transfer processes are never ideal, and a study of the techy of heat transfer will develop an understanding of the tradeoffs in the design of the devices that actually accomplish heat transfer. Heat transfer techy provides the basis on which heat exchangers are designed to accomplish the actual transfer of thermal energy. Additionally, the results of this beneficial study are important for several domains such as the industrial world, the educational world, as well as the scientific world in addition to researchers who aimed for some investigations outcome based on Heat transfer processes