Finned Tube Heat Exchangers

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We are a Leading Manufacturers, Suppliers & Exporters of Finned Tube Heat Exchanger. We cater finned tube heat exchangers which are designed as per the international standards and requirements of the clients.It have tubes with extended outer surface area or fins to enhance the heat transfer rate from the additional area of fins. Finned tubes or tubes with extended outer surface area enhance the heat transfer rate by increasing the effective heat transfer area between the tubes and surrounding fluid. The fluid surrounding finned tubes maybe process fluid or air.

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Design

To design finned tube type heat exchangers for enhanced heat transfer area, heat calculation of required heat transfer area and optimum spacing of tubes to create the required surface area are two parts of the problem. Increased heat transfer area can mean increase in the heat exchanger efficiency.Heat transfer coefficients at surfaces inside and outside the tubes are calculated using experimentally determined correlations. The heat transfer efficiency of fins is calculated using correlations. Different sets of correlations are available for calculation of fin heat transfer efficiencies of longitudinal and transverse fins. The fin area multiplied by fin heat transfer efficiency and added to bare tube area, gives the effective outer heat transfer area. Overall heat transfer coefficient is obtained by adding the heat transfer resistances evaluated at outer and inner surface areas of the tube. For outer area, value of the effective area is used. Finally the total heat transfer area required and hence required number, length etc. of tubes is calculated.Thus in a few such iterations, optimum arrangement of finned tubes, to obtain the desired heat transfer area can be determined.

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Applications of finned tube heat exchangers

Finned tube heat exchangers are preferred when you have a low heat transfer coefficient on the outside of the tubes. In such cases the extra heat transfer area created by the fins helps in ensuring that required rate of heat transfer is made possible.

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