Question

Select ways of improving fins esgichenry and Discuss pratical examples of the use of the identified ways of improvement in engineering practice.

Answer 1

1 Ein efficiency It is defined as the Actual heat bruser to the fin to the maximum Possible heat transfer. (Ratio) Qactal heat trasfer occurs when. is at its base temperat we Possible Surface TX where Maximum the entire Pin - LAST LAST Considering A reclangula fin. I T of (Lxbut) To look In actual cases, in suface will be having different temperature, which will decrese depends on length of the sin. For getting maximum heat trisfer, the entire fin Surface should have same base temperial we. So that, heat trasked from Fin to the Aid get indeses. Open (mad) = h Acea) - Ta)

Improving fin efficiency 1. Selecting a good conductor Material for heat A good conductor (min resistare in a temperative close to its base So that Actual heat trusted will be Maximum also. can provide temperatura close to 2. Length of the lin e Highed the length higher the heat tresser date but it decreses the efficiency. Because when length increses at borger length surface temperature of his will be very much less than the base Temperature. Hence Actual heat trasfer will also very much less than max. m decreses. A short fin can provide maximum efficicary but rate of heat trasfer will be low. Even though it will tresfer heat new to its Capesity.

In actual Practice For All shaped Fins, Thermal Conductivity should higher and based on the Purpose, optimum length should be designed inorder to achieve a uniforon temperature. Q man hefin length For a design, Like Q = Q max (The fin achieves it's base temperature). if L get intreses Rate of heat tresfer decreses than it's efficiency decteses.