Lord Fin Tube-Calculation method of fin tube heat transfer area

How to calculate the fin tube heat transfer area?

The calculation of heat transfer area of finned tube can be divided into three parts by accumulating all the parts exposed to air.

1. The surface area of the base pipe after deducting the fin thickness

2. Surface area of fin top after the accumulated effective number of fins

3, The surface area of the positive and negative two surfaces of the fin. 

4. The sum of the three surface area data is the heat transfer area of the finned tube.

Example of calculation method for heat transfer area of finned tube

Example: (steel-aluminum composite type) One finned tube is 1860 mm long, each end is 30 mm empty, finned tube is 25 mm in diameter, bottom diameter is 0.5 mm, tube thickness is 2 mm, fin distance is 2.8 mm, fin thickness is 0.35 mm, fin diameter is 57, effective fin height is 15.5 mm. What is the heat transfer area of a finned tube?

Calculate the area per meter first.

It is known that the fin thickness is 0.35, the fin spacing is 2.8, so the number of effective slices is 357.

1. The effective length of the base surface area

1000-357X0.35=0.875 m, which is 3.14X0.026X0.875=0.071435

2. The fin surface area of the fins

357X0.35=0.125 meters, and the outer diameter of the fins is 57mm. 3.14X0.057X0.125=0.0223725

3. The surface area of the positive and negative two surfaces of fins.

The radius is 0.0285 and 0.013, and the result is 3.14X (0.0285X0.0285-0.013X0.013) X357X2 = 1.44214.

4. The total result:

1.44214+0.0223725+0.071435=1.536m2/ M.

The effective tube length is 1800, and the finned tube heat transfer area of this type is 2.765 M2/piece.

If you want to know how to caculate finned tube weight, please move to finned tube weight caculator.

How to calculate the fin tube heat transfer area? How to caculate finned tube weight?