fin efficiency

fin efficiency

[′fin ə‚fish·ən·sē]
(engineering)
In extended-surface heat-exchange equations, the ratio of the mean temperature difference from surface-to-fluid divided by the temperature difference from fin-to-fluid at the base or root of the fin.
References in periodicals archive ?
Furthermore, we found a fin efficiency (the ratio of the actual fin heat transfer rate to the "ideal" fin heat transfer rate calculated assuming the entire fin is maintained at the base temperature) of 0.2824 for the constant h assumption and 0.1703 for the linear h(x).
where [[eta].sub.ref] is the total efficiency of the absorbing upper plate end and [[eta].sub.f] is the fin efficiency [1, 20].
Fin efficiency theory is adopted to calculate the fin effective area:
Fin efficiency is calculated with Equation (13), where L is length of fin (or half of tube interval), P is the perimeter of fin cross-section, and [A.sub.c] is fin cross-sectional area.
The fin efficiency is the ratio of the heat flow through the fin to that flowing through the fin if the entire fin surface is at the fin (root) temperature.
During the solution, the fin efficiency was determined using modified equations for plane fins, as suggested by Wang et al 2000.
Fin Efficiency. The heat transfer rate from a fin is given by Newton's second law of cooling:
The fin efficiency is defined as the ratio of the actual heat transfer from the fin surface to the surrounding fluid while the whole fin is kept at the same temperature.
Babaelahi, "Differential transformation method to determine fin efficiency of convective straight fins with temperature dependent thermal conductivity, " International Communications in Heat and Mass Transfer, vol.
When the fin efficiency [[eta].sub.f] obtained, The fin surface efficiency [[eta].sub.s] can be obtained, the fin heat transfer tube unit tube length heat transfer rate q concludes base tube surface heat transfer rate [q.sub.b] and the fin surface heat transfer rate [q.sub.f], quantity of heat transfer in one meter fin tube heat transfer surface is,