Green H finned tubes improve economizer performance
To gain the maximum benefit from the waste heat from the
boiler there are essential criteria that need to be considered with regard to
selecting the most effective economisers. These include ensuring that the
correct and durable materials are used and that the design and positioning of
the economiser itself are appropriate to achieve the required heat transfer.
One design solution, to optimise heat transfer is by using extended surface
tubing. This is done by adding fins to the tubing as shown below in a similar
way to a radiator. This ensures the heat transfer into the tube is maximised by
using the fin to conduct heat into the tube.
The use of H finned tube technology, rather than plain tubes, is particularly
suited to power stations which want to maximise waste heat recovery as
efficiency can be significantly increased within the space available. This
usually results in reducing the number of tubes, the economiser size and in turn
the heat of the exhaust gasses needed and input fuel used.
H fin applications – based on their design are well suited to both light and
heavy fouling, high ash content, and applications with most modern stations
using this application. Indeed our proprietary steel H finned tubes are used in
more than 70% of UK coal fired power stations and many more around the world
https://www.worldcoal.com/coal/20042017/waste-heat-recovery-units-in-the-coal-industry/