Howden has been awarded a contract for the upgrade of an existing Air Cooled Condensor at Twence BV in the Netherlands.

Twence operates a Waste Incineration Plant that generates energy from mixed (municipal) waste and biomass that have been stripped of all reusable materials. This plant is located in the close vicinity of the newly built Howden office at Gebouw N and Competence Center in Hengelo.

The reason for this ACC upgrade is to increase the performance and output of the turbine during the hot summer periods which is realized by increasing the water-steam cycle efficiency.

The principle of the improved efficiency is to simply increase the airflow along the existing finned tubes and this is exactly where the Howden Cooling Fan technology specializes in.

Naturally an increased air flow and sound level go hand in hand but the customer's objective was to keep this noise level increase to a minimum.

For this reason our SXT ultra-low noise fan has been selected and will be replacing the existing Howden ELFA fans.

Another advantage of this SXT fan is that the existing Fan Casing can be re-used which means a considerable saving with regards to Capex and installation time.

This contract comprises disassembly of the existing fans, transmission train and motors and supply and installation of 10 new fans, gear reducers, e-motors, VFD and also the installation of new cabling due to the increased power rating of the e-motors and to accommodate the additional instruments. Also the control and speed philosophy of the VFD driven fans is part of the contract.

The project is expected to be completed by end of 2021 after commissioning and extensive trial runs.

Are you interested in how we can help optimising your cooling fan performance or reducing noise emission - learn more about our retrofit service.