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I have an airflow meter and a wind meter (see below). Without access to the ducts, it's impossible for me to slot the airflow meter's tube into the straight sections for a more precise flow volume & velocity reading. Is there some kind of employable correction factor to adjust for this if I were...

Thanks for the input, this is all really helpful. The Fan and primary air filter should be upstream of the Evaporator coils.. And it makes sense that the primary air filters may have not been cleaned One thing for sure, is that the problem was not always there. It surfaced only recently, so...

Hi, I work at a hospital with a simple 4hp, Ceiling Concealed Fan Coil unit serving a small 50 sqft room, oversized of course. And yet, it's too warm inside (27'C) for staff comfort...(21'C - 24'C is desirable). AIR PATH: FRESH AIR IN -> EVAPORATOR -> HEPA FILTER -> BOOSTER FANS -> 10ft DUCTING...

There is another tank, and this tank has a design pressure of 20mbar(g), and a design vacuum of 50mbar(g). At first glance, clearly falls outside the scope of the scope of EN14015:2004, because the design vacuum of 20mbar(g) falls under the category of "very high pressure tanks" and anything...

okay, what kind of typical multiple of the fill pipe may be used? 1:1?

I've attached the dimensional analysis. Something I missed out: Can someone comment on the area reduction due to bird screens/meshes? Is this a logical calculation? I mean having a screen just restricts the flow of air at that point. Since air is compressible, is there even a need to use...

Hi, I've attached my calculations for an atmospheric EN14015 1000m3 steel tank with an emptying rate of 1440m3/hr. The trouble is with the sizing of the vents (read some of the other threads on this, and have been trying to find a suitable equation to determine the actual flow capacity of a...

The issue I've faced is really more of a commercial fault of a contractor - they bought pipes based off the wrong BQ - My company is just trying to maintain relations with them. However now that all the comments are quite unanimous here that the casings are more trouble than they're ever...

NEW QUESTION: Suppose I bury these concrete pipes with just 3ft of cover. Would these RC pipes fail? They've got work-proof strength of 45kN/m and crushing strength of 52kN/m. Soil is clay-silt.Link Could you help me check if my calculation is flawed? (File Attached) LittleInch: They will be...

OK I was informed that the MAWP has now to include the 500mbarg nitrogen blanketing pressure. Using EN14015:2004 (Clause 10.4), I calculated the roof plates to be 18mm thick due to the 500mbar pressure in the space above the liquid...

woops the attachment is herehttp://files.engineering.com/getfile.aspx?folder=a794f7ad-f6f7-427d-a68a-20f9fb762d45&file=Document1.pdf

Bought about a whole lot of 3m long 450mm reinforced concrete pipes to be used as protection for my ductile iron pipes, which will be running up to a 100m under a main road. Ran into two problems (and I still want to utilise those pipes): 1. If I place my two DI pipes, or even just one DI pipe...

They clarified that geodetic height in this context is atmospheric pressure. Also found out they have a pressure equalising line, and the -20mBarg corresponds to: a drain line needing to prevent air ingress down to a vacuum pressure of -20mBarg. So would it be logical to just design the tank to...

Thanks guys. I may get back when I clear things with the engineer

The datasheet provided of an atmospheric condensate storage tank was provided by a contractor: (1) Design Temp: 70degreesC (2) Operating Pressure: -0,05 - 0,35 barg. (I bet this means -50mbarg to 350barg) (3) Tank MAWP [bar g] = Geodetic Height + 500mbarg Nitrogen Blanket / -20mbarg My...

oh nevermind i found it. yes, salinity is going to be a problem. floods occur every year there is a potential of a hurricane even though there hasn't been one in the area

btw, are there any ready sources on the web about soil sulphate contents?

I do not have detailed empirical data off-hand nor much time to do a deeper study (this is a tender support job). The Contractors are from China and they are trying to cut cost here by suggesting the use of concrete U/G tanks. cvg: this is historical wind data provided by a weather study at...

rb1957: "The block will go with the plate" ... isn't there some structure resisting the body?", Yeah there is, ISBind mentioned some kind of resistive component with wheels. But that resistive force was not indicated on his first FBD.

to clarify: "Wind (cyclones) wind speed zero in Bangladesh, really?" i'm just limiting the scope of study. Wind speed is 28kph max. Thanks mintjulep, any other opinions?