The extent to which the tip condition affects the thermal performance of a fin depends on the fin geometry and thermal conductivity, as well as the convection coefficient. consider an alloyed aluminum (k = 180 w/m*k) rectangular fin of length l = 10 mm, thickness t = 1 mm, and width w > > t. the base temperature of the fin is tb = 100°c, and the fin is exposed to a fluid of temperature t∞ = 25°c. assuming a uniform convection coefficient of h = 100 w/m2*k over the entire fin surface, determine the fin heat transfer rate per unit width qf’, efficiency ηf, effectiveness εf, thermal resistance per unit width r’t,f, and the tip temperature t(l) for the tip conditions: convection heat transfer, adiabatic, and infinitely long.
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Ответ:
100 Watts
Explanation:Power is the rate at which work is done.Power is measured in Joules per second or watts.It is calculated by dividing work done in joule by time taken in seconds.Power = Work done ÷ time
In this case;
Work done = 10,000 Joules
Time = 100 sec
Therefore;
Power = 10,000 Joules ÷ 100 sec
= 100 J/s
Therefore, the power of the crane is 100 watts