surface area of rectangle number of fins

Furthermore, finned tubes are used when the heat transfer coefficient on the outside of the tubes is appreciably lower than that on the inside. The overall pattern flow of a finned tube exchanger is often crossflow, however, it can also be parallel flow or counterflow.įins are used to increase the effective surface area of heat exchanger tubing. Usually, for an air heat exchanger, where one of the fluids is air or some other gas, the air side heat transfer coefficient will be much lower, so additional heat transfer surface area or a fin tube exchanger is very useful. In many application cases, one finned tube replaces six or more bare tubes at less than 1/3 the cost and 1/4 the volume.įor applications that involve the transfer of heat from a hot fluid to a colder fluid through a tube wall, fin tubes are used. This then decreases the total number of tubes required for a given application which then also reduces overall equipment size and can in the long-run decrease the cost of the project. By having a finned tube in place, it increases the overall heat transfer rate. When the heat transfer coefficient of the fluid inside the tube is several times larger than that of the fluid outside the tube the overall heat transfer rate can be greatly improved by increasing the outside surface area of the tube.įinned tubes increase outside the surface area. Because of that, the fluid with the lowest heat transfer coefficient will dictate the overall heat transfer rate. Transferring heat from a hot fluid into a colder fluid through a tube wall is the reason many of us use finned tubes.īut you may ask, what is the major advantage of using a finned tube? Why can’t you just use a regular tube to make this transfer? Well you can but the rate will be much slower.īy not using a finned tube the outside surface area is not significantly greater than the inside surface area. for economizers in coal and oil fired units or waste incinerators. These are particularly suitable for dust laden exhaust gases, e.g.

Single pipe square finned tubes and twin pipe rectangular finned tubes are also manufactured as per customers’ requirements. Base Tube materials: Any material available, such as Carbon steel Tube, A179, A192, A210, stainless tube A269/A213 T5 T11 T22 304 316.

Fin Material: Copper, Aluminum, carbon steel, stainless steel.

H-economizer can also manufacture dual tube 'double H' type fin tubes, its rigid structure, and can be applied to a longer tube row occasion. HH Finned Tube economizer flash resistance welding processes used the welding seam after the high rate of fusion, weld tensile strength, and have good thermal conductivity. We call it HH or Doule H Fin Type Tubing. Rectangular Fins are welded on 2 steel base tubes. H Finned Tube economizer has two rectangular fins, similar to a square, its edge length for the fluorescent tubes of 2-fold, an expansion of the heating surface. H-economizer widely used in utility boilers, industrial boilers, marine power, such as the tail of heat exchanger components. H fin tube is a kind of boiler parts, which has two steel circular welded on base tubes to form fins positive shape much like letter 'H', so called H-fin tube. Due to larger surface area available, these finned tubes are used mostly in Air Heating application to reduce the overall size of the equipment. Due to rectangular shapes, which can offer large surface area compared to the Spiral Finned tubes.

and also manufactured as per customers requirements. H fin tube known as square fin tube, there are two types of H fin tubes, one type with single tube, normal called square fin tube, the other with Double tube, normal called rectangular fin tubes. We are designing and manufacturing fin tube modules, economizers/heat exchangers and the suitable heating surface cleaning systems according to your requirements. Straight tube arrangements favour a decrease of scaling as well as easier cleaning and maintenance and will lower the resistance coefficient.

for economizers in coal or oil fired units. These rectangular finned tubes are particularly good suited for dust laden exhaust gases that tend to scaling, e.g.

Surface area of rectangle number of fins