Question

Consider the following experimental system: 1. Three squared plates with cross section of 150 mm and various thicknesses as describes below (in [mm]) lay on top of each other and heated on the bottom side of the lowest plate. The plates are isolated from all the sides apart from the top side. The plates are made of different materials: Aluminum (6061), Stainless steel (304) and regular window glass. On the bottom side of the lowest plate a heating element that provides heat transfer flux of q" =6.10 [W/m2]. GIASS PLATE SS PLATE AIUMINIUM PLATE HEATING ELEMENT Figure 16: Experimental system question 1 Find, from available resources (textbooks, internet), the conductivities of the different plate's materials and calculate the thermal resistances of the systems. b. In the bottom part of the lowest plate (Al) a uniform temperature of T measured, what would be the temperature on top of the highest plate? c. On top of the highest plate (glass) a uniform temperature of T 43.5° C was measured. What is the reason to the difference between the value you calculated in the previous section and the value that was measured? Calculate the value of the factor causing the difference. a. 300° C was 150 15 GIASS PLATE S.S PLATE AIUMINIUM PLATE HEATING ELEMENT Figure 16: Experimental system question 1 51 3

Answer 1

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