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  1. offshorehvac

    HAP:Heating T stat set-point

    Hi Friends, I am working on a project where the inside temperature set point for cooling and heating is required to be set at 75 deg F. This is for an Electrical building which houses electrical and controls panels/cabinets Industrial application . Ambient in winter is 30 deg F. The software...
  2. offshorehvac

    ASHRAE Design Temp.: Annual Cumulative Frequency of Occurrence

    Friends, ASHRAE provides design temperatures for 0.4%/1.0%/2.0% (Cooling), 99.6%/99.0% (Heating) annual cumulative frequency of occurrence. Are there any guidelines or criterion available to decide what frequency of occurrence should be used for a projects? Thanks
  3. offshorehvac

    Louisiana: Industrial Building: Is energy code applicable

    Hello friends I am working on the design of HVAC system for electrical buildings for a industrial project located in Louisiana. Does the HVAC design required to be in compliance with energy code (ASHRAE Standard 90.1-2007 and is it required to use COMcheck tool? Per attached snap snapshot from...
  4. offshorehvac

    HAP V4.5 User defined U-Value

    Friends, Is there any way to enter user defined over all U-value in HAP? In our project, Overall U-value is already defined in architectural specification. Thanks
  5. offshorehvac

    Face Velocity for Door Grilles

    Hello Friends Are there any guidelines in National Building code or ASHRAE regarding maximum Face Velocity or free air velocity for air transfer grilles on doors/undercuts
  6. offshorehvac

    Chemical Dosing Tank sizing

    Firends Could someone please guide me how to size or select the chemecial dosing/feeder/pot tank on a closed chilled water loop. Plant size is 67 tons Thanks
  7. offshorehvac

    Pressure drop across valve

    Hi friends I am working on a project where I have to calculate pressure drop across a valve. Data is as follows Media: Air at 350 deg C Flow : 26000 CMH Valve : 600 dia Valve Kv : 1839 m3/hr-bar Air is being forced into the valve by an axial fan having discharge pressure of 100 mm of WG Thanks
  8. offshorehvac

    Air velocity in Exhaust duct from Kitchen Hood

    Friend Can someone directs me to the ASHRAE chapter or any other code where I can find any reference to recommended air velocity in the exhaust duct connected to Kitchen hood. Air will have oil/grease. Thanks
  9. offshorehvac

    Lloyds requirements for Galley ventilation

    Guys please help Is there any requirement in Lloyd rule for Galley ventilation on mobile semi I am looking for any requiremenys of air changes etc.. Thanks
  10. offshorehvac

    Chiller for Submarine air-conditioning

    Friends Any ideas who manufacture or supply water chillers for air-conditioning in submarines. Thanks
  11. offshorehvac

    Supplier for HVAC Chillers for Submarine

    Friends Any ideas who manufacture or supply water chillers for air-conditioning in submarines Thanks
  12. offshorehvac

    Can we connect exh from Toilet and Gym in LQ?

    Hi Friends Is it allowed to connect exhaust from toilets/washrooms and gymnasium on a common exhaust duct. On the project that we are working, we are required to exhaust all the air supplied to gymnasium. I am wondering if we can connect gym. exh. with cabin toilet exh. Are there any...
  13. offshorehvac

    Can We add Two diff. zones with diff SHR

    Hi Friends I am reviewing load calcutions submitted by a vendor Application is comfort HVAC for Living Quarter on an offshore Rig. There are about 90 small rooms being served by a large common AHU Vendor has divided the load for rooms into two groups In group 1, about 40 rooms and in group 2...
  14. offshorehvac

    FMEA for HVAC System

    Hi Friends I have been asked to check how the system will perform if 25% of the cooling capacity is lost. The system is in design stage and the system sizing considering all units operating is as follows Plant Configuration : 4 x 125 KW Ambient : 44 deg C/90% RH Installed Total Load : 500000...
  15. offshorehvac

    Coil coil load calculations

    Hi friends Can someone please verify and clarify? Application: Offshore Rig Area of operation: North Sea System :DX Ambient : 72*F/80%RH Inside required in Summer : 75*F/50%RH Loads/Airflows Room Sensible Load : 187000 BTU/Hr SHR : 0.89 Supply air: 15000 CFM Fresh air : 6100 CFM Return Air...

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