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2. Fin (extended surface) - Wikipedia

   en.wikipedia.org/wiki/Fin_(extended_surface)

   This is the ratio of the fin heat transfer rate to the heat transfer rate of the fin if the entire fin were at the base temperature, = ˙. in this equation is equal to the surface area of the fin. The fin efficiency will always be less than one, as assuming the temperature throughout the fin is at the base temperature would increase the heat ...

3. Heat transfer through fins - Wikipedia

   en.wikipedia.org/wiki/Heat_transfer_through_fins

   θ=Fin pitch[mm] v=Wind velocity[km/h] A more accurate equation for fin surface heat transfer coefficient is: = (/) + where k (avg)= Fin surface heat transfer coefficient[W/m 2 K ] θ=Fin pitch[mm] v=Wind velocity[km/h] All these equations can be used to evaluate average heat transfer coefficient for various fin designs.

4. Heat sink - Wikipedia

   en.wikipedia.org/wiki/Heat_sink

   A second type of heat sink fin arrangement is the straight fin. A variation on the straight fin heat sink is a cross-cut heat sink. A third type of heat sink is the flared fin heat sink, where the fins are not parallel to one another. Flaring the fins decreases flow resistance and makes more air go through the heat-sink fin channel; otherwise ...

5. Sol-air temperature - Wikipedia

   en.wikipedia.org/wiki/Sol-air_temperature

   Sol-air temperature (T sol-air) is a variable used to calculate cooling load of a building and determine the total heat gain through exterior surfaces. It is an improvement over: = Where: = rate of heat transfer [W] = heat transfer surface area [m 2]

6. Biot number - Wikipedia

   en.wikipedia.org/wiki/Biot_number

   The Biot number (Bi) is a dimensionless quantity used in heat transfer calculations, named for the eighteenth-century French physicist Jean-Baptiste Biot (1774–1862). The Biot number is the ratio of the thermal resistance for conduction inside a body to the resistance for convection at the surface of the body.

7. Annular fin - Wikipedia

   en.wikipedia.org/wiki/Annular_fin

   In thermal engineering, an annular fin is a specific type of fin used in heat transfer that varies, radially, in cross-sectional area. Adding an annular fin to an object increases the amount of surface area in contact with the surrounding fluid , which increases the convective heat transfer between the object and surrounding fluid.