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Recent content by jherbert

  1. jherbert

    Non-Disclosure Agreements

    SME = Small and Medium Enterprises
  2. jherbert

    flash tank vent blowing water

    A diagram would be nice, however a few observations: All the steam trapping should be carried before the flash vessel, primarily to prevent the flash vessel becoming a steam space which in turn prevents condensation cooling (necessary to avoid pump damage) When was the trap added? do this...
  3. jherbert

    Going Beyond LEED- Building Systems Engineering

    Eng: you spec'd SC and U value for glazing right? Arch: duh.....yup Eng: great, sooooooo what you specify? Arch: I'll get back to you on that..... Eng: Oh.....we have to submit a sh*t load of calculations based on these figures to get building department approval Arch:.......hmmmmmmmmmmmmmmmm
  4. jherbert

    Going Beyond LEED- Building Systems Engineering

    Just to add one more point...here the local system is called HKBEAM (equal to LEED) it costs the client about US$13K for an assessment, and that excludes the extra design, modelling, etc. Should the client spend that US$13K on building improvements that would save money, ie better windows or...
  5. jherbert

    Going Beyond LEED- Building Systems Engineering

    I was talking to an engineer, taking an architectural course and he confessed his horror about the method for teaching architect - to cut a long story short compared to any engineering course - little is actually taught. There is alos a political/historical problem in that many architects think...
  6. jherbert

    Going Beyond LEED- Building Systems Engineering

    "......and getting HVAC engineers to participate and do design assist on fenestration and building envelope design" eliminating the need for architects perhaps? But seriously, in the majority of cases the E&M engineering is appointed way too late, the arch/client have normally bought the...
  7. jherbert

    Car Wash Facilities

    I would add that after the Noroxo factory Legionella outbreak in France 2003, where the car wash tested positive for legionella and was closed down (athough that was most probably a cross infection from adjacent cooling tower). And the current outbreak in Norway 2005 where an industrial...
  8. jherbert

    Server Room Cooling Requirements

    If the servers run 24/7 - I would check that your air conditioning actually operates over weekend, public holidays, etc.
  9. jherbert

    High Rise Piping Design

    The primary reason for verticall spliting zones in high rise building is the statis hd, and hence the cost, and delivery. Incidentally, this principle also applies to fire services installation in high rise buildings. For example, taking SAK9 4.5 m floor to floor If the chiller is at a low...
  10. jherbert

    Problem on flooding at AHU Room

    ......agree with mintjulep the OP states he has a sealed room, as return air plenum. Most likely the relative low room pressure (-) is drawing waste water from the trap into the plant room. Incidentally, that is how SARS outbreak occurred. Anyway solutions: - unseal the plenum - increase...
  11. jherbert

    Plumbing Design Book

    or IOP manual http://www.iphe.org.uk/publications/guide.html
  12. jherbert

    assessing sewer pipe condition

    hi, The site is remote, and you have a backhoe on site? I would seriously consider doing the work now. It is only 1/3 mile, 20 years old and nearing end of economic life - replace it. Putting a new pump on an very old piping system is just asking for trouble in my view. It seems that part...
  13. jherbert

    Aqua Cool Cooling Towers

    iken, slightly off-topic, if I have read this right, you have no isolation valves for each tower? - how does one isolate a tower for inspection, maintenance and cleaning? - no bypass is mentioned either, that limits options for future chemical treatment, since only treatments that are fill...
  14. jherbert

    Galvanised Mild Steel Pipe

    BRIS, From my experience the reasons GI is used is simple, availability. When I arrived in Hong Kong (from UK) I was shocked to find that GI was used for everything! potable water chilled water, everything was GI. Primarily because that was all that was available and the importers didnt want to...
  15. jherbert

    Selecting the best method forr Water quality for cooling tower

    To establish the cycle of concentration for your installation, one needs a feedwater quality analysis. Regarding "...the best method.." it depends on the source of the feedwater. If served from your water utility, ask them or served from a river take a sample to the nearest lab. Most water...
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