Fin Fan Heat Exchanger Calculations

K fin material conductivity coefficient.

Fin fan heat exchanger calculations.

Fins are used to increase heat transfer area and provide a cooling effect. Apf total external area ft of fintube in ft ft 5 58. The value of rfin for use in eq 2 2 is given by φ φ fo o fin root fin r h a a r 1 1 2 5. H air film convective coefficient a exposed surface area of the fins.

2 fundamentals of heat transfer 1 2 1 design of finned tubes 1 2 2 fin efficiency 3 2 2 1 plain geometry 4 2 2 2 finned tubes 7 2 3 special consideration in the calculation of heat transfer 10 3 equations for the external heat transfer coefficient 12 3 1 staggered tube arrangements 12 3 1 1 overview of equations 12. Tube configuration used in this guideline. Apsf external area in ft ft of bundle face area. Air cooled heat exchanger sizing does preliminary estimation of finned area plot size total fan power and air outlet temperature checalc chemical engineering calculations to assist process plant operation and maintenance engineers.

Fin fan heat exchangers are generally used where a process system generates heat which must be removed but for which there is no local use. A fin fan is a type of heat exchanger that forces air over a set of coils to cool the process. However if h a p k is greater than 1 00 the fins will insulate and prevent heat flow. 1 inch od tube 5 8 inch fin height 10 fins per inch and 2 5 inch triangular pitch.

Accordingly we will only reiterate the major equations and concepts here. Fin efficiency and fin resistance the general concept of fin efficiency and fin resistance was developed in chapter 1.