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Case Study: Isle of Man Hospital Steam Boiler Economisers
Courtesy of ThermTech Limited
The hospital had two 6,000 kg/hr and one 4,000 kg/hr natural gas fired steam boilers running at 10 bar g each.
The SolutionThree bespoke boiler economisers were installed in a horizontal orientation fitted directly onto the boiler flue exhaust flange with inlet / outlet gas side transitions to suit.
Each boiler economiser cools the boiler flue gases from 240 to 160 °C, thereby preheating boiler feed water from 110 to 135°C, resulting in a ~5% uplift in boiler efficiency. The consequent savings in fuel mean the project will pay for itself in just 3 years from the date of commission.
The low additional back pressure on the burner fan and the low additional pressure drop across the boiler feed pump as a result of retrofitting the boiler economisers mean that normal operation of the boiler is unaffected.
The project won the hospital a government award for ‘Best Innovation’. Read the full story here.
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