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/