Week Two

     In week two, two major tasks were done to ensue a proper design of the heat pipe. 
       First, a simple sketch was design to gain a better understanding of the object. The diagram below shows the initial design of the heat pipe and how it will be attached to the cooking pot.

                               Figure 1. A cooking Pot with attached heat pipe.

The main cooking pot will be made using stainless steel and copper will be used to make the heat pipe. The initial design of the pot will be 30cm diameter and 30cm tall. The heat pipe inside the pot will measure 15cm tall and and half inch wide.
         Second, to determine the reliability of the materials chosen, more information was gathered on how a hollow copper and working fluid (water). Because copper has a high electrical conductivity and water have an ability to observe heat starting at 20C to 350C, these two materials were much more preferred.  
      
        Other advantages obtain using copper is its resistance to corrosion, hygienic property, easy to join by soldering or brazing, it allows minimum amount of energy to be lost as well it's cost effective compare to other materials. Also, in this application if copper-water is design properly it can withstand a high heat load as well as withstand a freezing temperature ranging from -55C to 180C  

The diagram below shows the inside of the heat pipe and its functionality. The inside of the heat pipe is installed with a wick- a porous structure that enable liquid to move back to the evaporation region after condensation.  Wick or capillary structure inside the heat pipe a design to overcome gravity due to the pressure different between evaporation zone and condensation.

              Figure 2. shows how heat pipe is design in inside


Reference:
      http://encyclopedia2.thefreedictionary.com/Heat+Pipe
      http://www.thermacore.com/products/copper-water.aspx