Water efficiency case study: Moorfields Pharmaceuticals

Moorfields Pharmaceuticals is part of London’s Moorfields Eye Hospital NHS Foundation. It produces special formulations for ophthalmic patients and licensed products such as eye drops.

By fixing their heating system, the company reduced water consumption by over 13,000 m3 per year and is now saving approximately £22,000 every year.

As part of an ongoing project to reduce water and energy use at its London site, Moorfields identified its heating system as a potential source of water wastage. Excess steam from the hot well tank, in which heating water is collected for recirculation, passes through a U-section of pipework which had become blocked with condensate, causing expensive, heated water to vent back into the plant room as steam. Simply by adding a tap, trapped condensate can now be removed, allowing steam to collect in the vent tank and stopping the uncontrolled loss of water from the system.

Moorfields also uses a technique called a ‘blowdown’ to clear the boiler of impurities and found that the blowdown vessel (used to collect water from periodic blowdowns) had become partially blocked by limescale, forcing excess water out of the vessel steam vent. Eradicating the limescale enabled the boiler to function more efficiently and reduced excessive water loss. 

“In eradicating these problems we are saving the equivalent of over 10 London buses filled to the brim with water each month”.
Kevin Firth, Project Engineer, Moorfields Pharmaceuticals.


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