Eight ABB standard drives are saving Ginsters bakery a potential 17% a year on its chilled water energy bill, following the installation of chiller pumps at its Callington bakery in Cornwall.
Ginsters asked ABB to carry out an energy survey at the plant, with the help of its partner, APDS. The survey focused on the refrigeration system, in which chilled water pumps ran constantly with a full unrestricted flow, providing chilled water to the cold storage and production areas of the plant.
APDS measured the power consumption of the pumps over 24 hours and analysis showed that using a variable speed drive to achieve a speed reduction of only 6% would reduce energy consumption, and therefore, operational costs by some 17%.
A trial installation of an ABB drive showed improved stability of the system and again reduced power consumption. Following this, permanent ABB drives were installed on all pumps. Alan Jones of APDS says: "The drives have been running for eight months now and Ginsters is set to achieve a one-year payback on the application."
Projects manager Tom Crawford adds: "Reduced power consumption has been realised on site and we know from the pre- and post- installation surveys that we are using less electricity to drive the pumps."
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