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Heat-Transfer-from-Extended-Surfaces

An electronic semiconductor device generates 0.16 k J/hr of heat. To keep surface temperature at upper safe limit of 75 degree Celsius, it is desired that heat generated should be dissipated to surrounding environment which is at 30 degree Celsius. The task is accomplished by attaching aluminum fins, 0.5 square mm and 10 mm to surface. Work out number of fins if rmal conductivity of fin material is 690W/m K and heat transfer coefficient is 45k J/square m hr K. Neglect heat loss from tip of fin


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An array of 10 fins of anodized aluminum (k = 180W/m K) is used to cool a transistor operating at a location where the ambient conditions correspond to temperature 35 degree Celsius and convective coefficient 12W/square m K. The distance AB is 3 mm, EF is 0.4 mm. The length of the fin is 5 mm and has its base at 60 degree Celsius. Find the power dissipated by the fin array?
An array of 10 fins of anodized aluminum (k = 180W/m K) is used to cool a transistor operating at a location where the ambient conditions correspond to temperature 35 degree Celsius and convective coefficient 12W/square m K. The distance AB is 3 mm, EF is 0.4 mm. The length of the fin is 5 mm and has its base at 60 degree Celsius. Find the power dissipated by the fin array?\r\n

An electronic semiconductor device generates 0.16 k J/hr of heat. To keep surface temperature at upper safe limit of 75 degree Celsius, it is desired that heat generated should be dissipated to surrounding environment which is at 30 degree Celsius. The task is accomplished by attaching aluminum fins, 0.5 square mm and 10 mm to surface. Work out number of fins if rmal conductivity of fin material is 690W/m K and heat transfer coefficient is 45k J/square m hr K. Neglect heat loss from tip of fin

A rod of 10 mm diameter and 80 mm length with thermal conductivity 16W/ m K protrudes from a surface at 160 degree Celsius. The rod is exposed to air at 30 degree Celsius with a convective coefficient of 25W/square m K. How does the heat flow from this rod get affected if the same material volume is used for two fins of the same length? Assume short fin with insulated end

An electronic semiconductor device generates 0.16 k J/hr of heat. To keep the surface temperature at the upper safe limit of 75 degree Celsius

it is desired that the heat generated should be dissipated to the surrounding environment which is at 30 degree Celsius. The task is accomplished by attaching aluminum fins

0.5 square mm and 10 mm to the surface. Work out the number of fins if thermal conductivity of fin material is 690W/m K and the heat transfer coefficient is 45k J/square m hr K. Neglect the heat loss from the tip of the fin

Heat Transfer from Extended Surfaces

Heat-Transfer