Steam system generates energy savings
October 1st 2004

Westferry has made substantial cost and energy savings at its Docklands printing works since replacing 38 40kW electrode humidification units with Cubit steam generators from Eaton-Williams.

Three gas-fired Cubit System III units with triple burners have been installed to provide the large scale humidification required. Each system has a rating of 640kg/h F/A 100°C at 5bar, giving a total installed rating of 1920kg/h. Two systems more than satisfy the humidification load; the third unit is kept on standby.

Although units operate as standalone systems, they are linked so that they use a common steam header, which in turn feeds three separate pipe runs. Steam is then supplied to each AHU via a direct steam injection humidifier and control valve. This humidifies the reel stands where the printing paper is held immediately prior to use. Steam is also fed into the press hall. Both areas require 50% RH to maintain paper quality.

In the first year the system was installed, Westferry achieved an energy saving of £100,000 and maintenance saving of £26,000, equating to a payback of two years.