I don't mean any disrespect to the ones that have responded to this thread, but I'm really bothered by the responses. I thought the whole point of this was to impart knowledge, not to shun those that lack it. The two answers that I see provide no kind of insight whatsoever, only an offer of...
It was in the 30s in the basement this morning, so I'm pretty sure the building is not situated within a volcano crater =D. I think it's simply the ME misusing terminology.
I take that you are looking at the 3.6 KW unit. This is simply saying that if you have a higher external pressure, you are going to get less air flow. Which makes sense.
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The fan capabilities are fixed, but the duct size and outside pressures are not. These outside influences are going to...
I have an application that uses a 100% outside air intake with a HW coil in the duct. The application calls for freeze protection with a pump. Problem is, there is no schematic on this. I've searched high and low for something with no results. Can someone provide me either a schematic or...
Since the riser diagram shows the absorber in the basement, I think GenB's answer more aligns with my application. Thanks to both GenB and gr2vessels for the response.
I'm looking at contract drawings that call out an expansion tank in the schedule for plumbing. However, on the riser diagram it shows a 'thermal absorber'. Is there a difference or are these interchangeable terms?
Yeah, these were the formulas they outlined. However, there is no distinction between the two. Given that the tank is exposed to atmospheric pressure and fluid is being pumped therefrom, the two formulas should be equivalent. The static head plus the velocity head should be the same as the...
I came across these two definitions for Net Positive Suction Head and Net Positive Suction Head Available:
NPSH = p(s)/y + v(s)^2/2g - p(v)/y
and
NPSHa = p(atm)/y - h(e) - h(l) - p(v)/y
where:
p(s) = static pressure in fluid
y = specific weight of fluid
v(s) = velocity of fluid
g =...
I have a tank with deicing fluid and methane gas which collects at the top of the tank. I want to be able to alleviate any the pressure created from an incidental (static friction, etc.) ignition of the methane gas. Would a rupture disk be the right direction? Would you base the analysis...
Thank you for all your responses. PTMOSS is right on target with his assessment: it doesn't matter what we think/know is right I just needed some standard that stated this in writing. I am an entry level engineer just feeling my way out and someone brought this issue up to me and I wanted to...
i don't want to do this: it's just a situation where two separate designs are going on at the same time and there si a conflict with this particular issue. they want to put a force main over ours and we didn't want them to do that, but there response was: "what is prohibiting us from doing that."
Does anybody know of any wastewater standard (I am located in Long Island, NY) that has language regulating the placement of a force main directly above another force main?
