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  • Users: nicolai
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  1. nicolai

    Shed structure indoor or outdoor classification

    Hi Folks as what is an IBC storage area cover with an overhead roof (but not on the side walls) classified outdoor or indoor I am considering a sprinkler system in accordance with NFPA 400 and NFPA 13 for fire sprinkler protection at appear no other choice than deluge sprinkler over entire...
  2. nicolai

    Sulfuric Acid Storage

    Hi Folks possible to direct me to the applicable codes and guidelines regarding bulk outdoor storage of Sulfuric Acid (98%) many thanks
  3. nicolai

    Safety valve selection hot water

    Good day folks who can direct me to applicable source or guideline... I need to select pressure safety relief valve for high temperature hot water system (not steam) operating 188 °F (87°C ) The vessel volume is 1,300 gallon ( 5,000 liter ) The hot water source is a boiler high temperature...
  4. nicolai

    supplementary hydrants and hose streams @ fuel facility

    Hi Folks what NFPA code provide guidance on requirement for suplementary hydrant and hose stream flows to be allowed for fuel depot facility The facility has mounded fuel storage with loading and decanting bay (for which foam/ water sprinkler protection will be provided for ) requiring guidance...
  5. nicolai

    yellow cake dust conveying velocity

    hi Folks repost from nuclear engineering forum do anyone has any reference regarding the settling velocity of yellow cake (uranium oxide) dust. Need it to ensure min velocity is adhered to prevent settling in duct system thanks
  6. nicolai

    yellow cake dust- settling velocity

    hi Folks do anyone has any reference regarding the settling velocity of yellow cake (uranium oxide) dust. Need it to ensure min velocity is adhered to prevent settling in duct system thanks
  7. nicolai

    hot water tank tube HX

    hi folks i am missing something i am required so size immersed copper U-tube HX in a tank known required heat capacity (kw) Hot side Th in : 120 °C Th out : ? Cold side Tc in vessel : 20° Tc out : ? Vessel target temperature : 80°C LMTD method not applicable since not all temperatures...
  8. nicolai

    economizer heat exchanger -hot water boilers

    Hi folks is it viable to provide an economizer heat exchanger for preheating on the stack outlet of high temperature hot water boiler ( fire tube) - LFO fired? is their any pitfalls to be aware of using an economizer on an LFO fire tube boiler? many thanks
  9. nicolai

    SO2 SO3 emissions

    Hi Folks what is the generally accepted emission removal process for Offgas mainly containing SO2 and SO3 Any reference or literature you could recommend? many thks
  10. nicolai

    damper actuator selection

    Hi Folks i am looking for literature on the sizing narrative to select electrical actuator for dampers on industrial ventilation ( torque etc) are you aware of any reference ?
  11. nicolai

    effluent pump station screening

    good day folks, I am exploring options for screening option for submersible type effluent pump station daily flow 1500 m³/day we have relative deep invert level on in -feed pipe options -manual incline bar screen [ not deemed feasible due to depth of in-feed] -mechanical rake screen [...
  12. nicolai

    effluent pump station screening

    good day folks, I am exploring options for screening option for submersible type effluent pump station daily flow 1500 m³/day we have relative deep invert level on in -feed pipe options -manual incline bar screen [ not deemed feasible due to depth of in-feed] -mechanical rake screen [...
  13. nicolai

    PRV station

    Hi all, on a PRV station on water distribution.. to my knowledge it is good practice to provide Pressure regulating valves PRV) in two paralel lines to cater for for flow fluctuations big line to cater for high flow and small line to cater for low flow situations selection of large line not a...
  14. nicolai

    Covid 19/ Ventilation

    With the current pandemic going on what is the anticipated upgrade expected of guidelines especially on recirculating air conditioning systems what would be the best technology to fit on the return air side of FCU's etc HEPA filtration will result in huge pressure losses whast your take?
  15. nicolai

    hydraulic calculations for hydrocarbons

    hi everyone I am looking for references on hydraulic calculations ( pipe, pump sizing etc) for hydrocarbons which formulas are applicable etc. any advice would be appreciated.
  16. nicolai

    Data center cooling

    Hi There what is the methods applicable to establish cooling load required for equipment in data center area based ( w / m2) or breaking it down per equipment intended what type of data center equipment is most sensitive to humidity regulation thank you
  17. nicolai

    2 air compressors in parallel

    hi There we have a scenario to expand the current compressed air delivery ( flow) what is the practical implications of running 2 rotary screw compressors in parallel?
  18. nicolai

    horizontal grit collection canals- depth

    Hi Every one how deep could one go with invert level of inflow from practical perspective? intended grit removal is by portable jet pump. is depth of 3 meter sensible?
  19. nicolai

    rolling resistance reference

    Hi there are you aware of book or literature on rolling resistance coefficients of various materials?
  20. nicolai

    carton Drop chute

    hi all anyone aware on any guidelines for chute design for cartons/ boxes?

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