Why CiBAS

The Unique and Patented features of the Concentric Integral Bypass & Silencer (CiBAS) WHRU make it pure simplicity.

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  • The CiBAS WHRU combines the heat exchanger coil, exhaust gas control (Damper) valve & silencer into a single module which is delivered complete, cold commissioned & ready for installation in just one day.
  • Required deck space is approximately 50% lower
  • Weight is approximately 30% lower
  • The CiBAS unit is also versatile, being of a modular design makes it ideal for retrofitting onto existing gas turbine packages. To save a client the additional costs of having an additional deck being built on a platform to accommodate a Traditional WHRU arrangement there is a CiBAS variant design to operate “upside down/ inverted
  • The CiBAS Helical Coil Heat Exchanger is fully exposed to the gas turbine exhaust providing a larger Heat Transfer Area per Unit Volume coupled to a Higher Heat Transfer Coefficient due to Enhanced Turbulence Caused by the Geometry of the Coil Bundle. The multiple pass coil design accommodates low process pressure drop requirements 1.0bar

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  • The CiBAS exhaust damper valve is a single vertical moving part designed on a “Sleeve Valve”. Therefore as the gas flow is controlled linearly the load on the valve is limited to the weight of the sleeve. As a result the exhaust gas damper valve isn’t subjected to the stress and forces seen in a Multi louver damper arrangement which leads to increased reliability and lower maintenance requirements.
  • The CiBAS exhaust damper valve in the event of a power interruption will fail safe into bypass mode under its own weight with an accumulator providing the final push to achieve a seal thus allowing the gas turbine to keep running.
  • Due to the aerodynamics of the CiBAS Plug & Sleeve design the exhaust gas pressure drop is lower resulting in more power being available from the gas turbine.
  • With its integral silencer achieving >80Bba at 1 meter the CiBAS WHRU does not require any additional attenuation. Whereas the traditional WHRU requires a silencer designed to attenuate at source, even though the heat recovery equipment provides a certain amount of attenuation. These silencers are usually installed directly after the gas turbine exhaust volute, and this takes up considerable space and often restricts layout possibilities and often increases the centre of gravity resulting in a need for considerable support steelwork.
  • CiBAS can be mounted directly above the Gas Turbine with vertical radial exhausts or adjacent to the end or side for horizontal axial exhaust layouts.
  • Due to its cylindrical shape the CiBAS has a lower wind/blast profile than the boxy rectangular shape of the traditional WHRU, thus less support steelwork is required
  • With its single moving part maintenance is minimal and is carried out within the timescales allocated for the gas turbine shut down period.

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