Heat exchange area
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What is the formula for calculating the heat exchange area of a fixed-tube-sheet heat exchanger?
A=πd(L-2δ-0.006)n. A represents the heat exchange area; d is the outer diameter of the heat exchange tubes, L is the length of those tubes, δ is the thickness of the tube sheet, and n is the number of heat exchange tubes
To add the unit for the value above: A = πd(L – 2δ – 0.006)n. Here, A represents the heat exchange area in m2; d is the outer diameter of the heat exchange tubes in meters; L is the length of the heat exchange tubes in meters; δ is the thickness of the tube sheet (assumed to be 0.05 m); and n is the number of heat exchange tubes. This post was last edited by asdfg104 on 2009-2-19 13:14.]
The coefficients vary from manufacturer to manufacturer. When selecting a heat exchanger in practice, manufacturers use experimental data for calculations; theoretical values can only serve as a reference, and sometimes the discrepancies can be quite large
A=πd(L-2δ-0.006)nA; this formula is used to calculate the heat exchange area, in m2. d represents the outer diameter of the heat exchange tubes, in meters; L is the length of the heat exchange tubes, also in meters. δ is the thickness of the tube sheet (assumed to be 0.05 meters). n denotes the number of heat exchange tubes.
The coefficient is π, 3.1415.......
In the formula A=πd(L-2δ-0.006)n, the value 0.006 may be 0.005; it is related to the length by which the tube end protrudes from the tube sheet, and it is not necessarily 0.006
Section 3.7.1 of GB151－1999 provides a clear description: To calculate the heat exchange area, the outer diameter of the heat exchange tubes is used as the basis; after deducting the length of the tubes that extend into the tube sheet, the external surface area of the tube bundle is determined； For U-tube heat exchangers, the area of the U-tube sections is generally not included, in m2. The formula will naturally come out; calculate it by yourself. This post was last edited by www557 on 2009-2-19 13:27]