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  • Users: sauba
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  1. sauba

    Natural Gas Piping Pressure Drop

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  2. sauba

    Natural Gas Piping Pressure Drop

    I have a problem I would like a sanity check on if anyone has a few minutes. I have a natural gas system designed for about 3" W.C. of pressure drop from the meter/regulator to the most remote burner. The system is approximately 1000 total equivalent feet. The total load at the meter is 10000...
  3. sauba

    Medical Air vs. Breathing Air

    I am having a hard time figuring out what the difference is in Medical Air and Breathing Air. From what I can tell, Medical Air systems must meet the requirements of NFPA 99, but the quality of the air is the same as OSHA Grade D breathing air. Is this correct?
  4. sauba

    HVAC Annual Maintenance Cost Estimates

    I am having a hard time finding anything on the website. Do you have a link or a title of the publication? Thanks
  5. sauba

    HVAC Annual Maintenance Cost Estimates

    Anyone know of a good source for HVAC annual maintenace cost estimates based on system type, either per ft^2 or ton? Thanks
  6. sauba

    engineering outlook for us young guys

    Looks like the shortage of engineers we were lead to believe existed is actually quite a surplus (as all of us who have graduated college in the last few years know very well). http://www.redherring.com/Article.aspx?a=14849&hed=U.S.+Engineers+Undercounted&sector=Industries&subsector=Computing...
  7. sauba

    Maximum Leaving Air Temperature

    Tombtech - My last statement I intended to propose that I increase airflow to lower supply temperature. Walkes - My system is hot water reheat vav in an office environment. I guess I am just looking for a ballpark figure/ROT. Do you generally try to stay under 90 F? This seems to be the most...
  8. sauba

    Maximum Leaving Air Temperature

    What is generally the maximum leaving air temperature for VAV system with ceiling diffusers? I have seen temperatures ranging from 85 to 110 degrees. What is the most commonly accepted method for lowering this temperature and achieve desired heating? Are minimum airflows generally increased...
  9. sauba

    Professional Society Attendance?

    There are very few peers in my age/experience (24, 2.5 years industry experience) range at my local ASHRAE chapter which I find to be a bit of a deterrant. I would enjoy the opportunity to discuss some of the issues of being a young engineer with peers rather than just hear from the seasoned...
  10. sauba

    Interview advice

    What is a reasonable amount of time to ask for to consider an offer?
  11. sauba

    Please give me some advice as FE exam is approaching

    Geosmith, The following link may also provide some useful info from people who have recently taken the exam. http://ppi2pass.com/ppi/PPIInfo_pg_myppi-faqs-FEadvice.html
  12. sauba

    Peak Demand Calculation

    I think I have it now. Lots of good information available on utility provider websites, so with a little research it all started to make alot more sense. I am assuming I a misheard the utility company and he said 29.7 kw rather than kwh and this is the peak demand. From this, I calculated...
  13. sauba

    Peak Demand Calculation

    raisinbran, Thanks for the response. That makes more sense. Just to make sure I have it straight, the peak demand represents the average maximum power delivered to the space over a defined period of time such as 15 minutes? Is this determined by averaging a number of instantaneous readings...
  14. sauba

    Peak Demand Calculation

    I am trying to calculate the peak demand in amps to a space. The utility company has informed me that the max reading to the space in a 15 minute period was 29.7 kWh. If i have 120/208 V service to the space, am I correct in calculating this as: I=kWh/(V*T)=29.7*1000/(.25*208*SQRT(3))= 329.76...
  15. sauba

    Please give me some advice as FE exam is approaching

    You can't take reference material to the exam. I think this used to be the case, but now you are only allowed to use the formula book they provide. I took the exam in October 2003 and elected to take the General afternoon section. I have BSME, which I thought prepared me fairly well for the...
  16. sauba

    Switching professions

    It seems to me that few companies are willing to train young engineers. If they can get what they want out of you as a technician, they will take it. If they can get what they want out of you as a drafter, they will take it. If they can get what they want out of you as an engineer doing the...

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