An economiser fitted into the exhaust of a Waste Heat Boiler on a gas turbine power generator.

The unit was fitted with an integral flue gas by-pass and preheated boiler feed water in within 10 degrees of saturation temperature at 20 bar.

The by-pass was used to automatically regulate the flow of gases through the economiser and so control the water temperature at all combinations of power/heat.

[table caption=”Case Study 3″ width=”500″ colwidth=”30|40|30″ colalign=”center|center|center”]
Capital Cost, , £64K
Savings, , 270KW
Payback, , 18 Months
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