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  1. MechEng001

    High Rise Stair Pressurisation

    I have sized the shafts to include ducts to prevent air leakage and have sized ducts at 6.5m/s. Is there a particular velocity you would use with a single fan? do you generally use ducts or simply push the air through the riser without ducts? Cheers for the help!
  2. MechEng001

    High Rise Stair Pressurisation

    We have an elevator, but there is no requirement to pressurise the elevator shaft on this project.
  3. MechEng001

    High Rise Stair Pressurisation

    I am designing the stair pressurisation for a building of 37 stories. I am using a set of fans at the top of the building and a set of fans at the bottom. I am going through a review process at the moment and have been told that generally for a building of this height we should have a 3rd set of...
  4. MechEng001

    Stair Pressurisation Fans - High Rise

    Thanks tys90, I will have a look at the ASHRAE handbook. 317069 I was hoping for lessons learnt on previous experiences - I am sure people have found some things work better than others and you can always learn from this and improve on design.
  5. MechEng001

    Stair Pressurisation Fans - High Rise

    Has anyone designed a stair press system for a high rise building (about 30 floors). Have you had trouble the maintaining required pressure throughout the entire stair? I have designed stair press systems for smaller buildings but have been told there can be issues with achieving the required...
  6. MechEng001

    Seawater Heat Rejection - Venturi Nozzle

    Hi, I have a project that is using a sea water system for heat rejection for a building and it requires a venturi nozzle to ensure adequate mixing and reduced temperature difference (between discharge water from mechanical plant and sea water). Has anyone used a venturi nozzle before, or do...

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