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Dennis Alwon

Dennis Alwon

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Chapel Hill, NC
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Retired Electrical Contractor
Okay-- how many seconds will it take for you all to tell me what the picture below is? I have no idea. Well I have ideas but that's it. There were 4 or 5 of these. These are mounted on the roof of a university building.

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Here is a fume hood

fume-hood.jpg


I worked at a University in Boston and they had a forest of similar vents on the roof, but almost all them had this symbol on them


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My guess was a hood but why so high. This building is not on campus grounds but over by the maintenance and surplus buildings about a mile or so from campus. I don't think they are labs in this building but I will try and find out.
 
The pipes are necked down to slow the flow rate to allow pollution removal equipment time to work?
 
They generally neck the exhaust down like that when nasty stuff is coming out. This increases the velocity of the air and shoots it higher. This is to keep the nasty junk from leaving spots on cars in the parking lot and making funny dead spots on the shrubbery, among other reasons.
 
mdshunk said:
They generally neck the exhaust down like that when nasty stuff is coming out. This increases the velocity of the air and shoots it higher. This is to keep the nasty junk from leaving spots on cars in the parking lot and making funny dead spots on the shrubbery, among other reasons.
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I'm glad at least they are saving the cars. :grin:
 
mdshunk said:
They generally neck the exhaust down like that when nasty stuff is coming out. This increases the velocity of the air and shoots it higher.
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I had kind of figured that but was not sure enough to post it.

He mentioned it's near a service area, I am thinking small incinerators for bio hazards. Pretty similar shape on those stacks as the stack on crematorium a friend worked at an animal cemetery.
 
iwire said:
He mentioned it's near a service area, I am thinking small incinerators for bio hazards. Pretty similar shape on those stacks as the stack on crematorium a friend worked at an animal cemetery.
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Now that's a very realistic possibility.
 
stickboy1375 said:
I'm glad at least they are saving the cars. :grin:
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Here's a story from a place I used to work at. A famous connector manufacturer that rhymes with Tramp. They had a plant with many exhaust stacks that a nearby car dealership claimed was messing up the finishes on their new cars, and employees of the plant had similar complaints.

Sort of cloak and dagger style, trusted employees were sent out each Friday to rent new cars from rental car companies. Trunk lids and hoods were removed from those rental cars and placed all over the plant's roof as an experiment. Over that weekend, a local body shop would put new trunk lids and hoods on those rental cars and they were returned that Monday, no one the wiser.

As it turned out, the exhaust did indeed effect the finishes on the test panels placed on the roof. The plant summarily bought a lot full of new cars, had a lot of employee cars painted, and they installed scrubbers on the worst exhaust offenders.

Those were the days.
 
mdshunk said:
Trunk lids and hoods were removed from those rental cars and placed all over the plant's roof as an experiment. Over that weekend, a local body shop would put new trunk lids and hoods on those rental cars and they were returned that Monday, no one the wiser.
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Wouldn't it have been cheaper just to get hood and trunk lids to put on the roof?
 
iwire said:
I am thinking small incinerators for bio hazards.
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I found out that those fans are exactly what Bob said (you win). The building is the universities own little EPA and it takes care of all the hazardous wastes including fluorescent tubes ballasts, etc.
 
You found them !

You found them !

Call the White House! You found those "WMD's finally Bush can stop looking. :D
 
iwire said:
I had kind of figured that but was not sure enough to post it.

He mentioned it's near a service area, I am thinking small incinerators for bio hazards. Pretty similar shape on those stacks as the stack on crematorium a friend worked at an animal cemetery.
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Animal cemetery? Really?
 
jdsmith said:
Animal cemetery? Really?
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They do lots of research on animals in the labs at big universities. This one is Univ of NC at Chapel Hill. They also don't like it to be known that they are messing with animals

Buck-- those missiles are aimed at Duke. Be careful over there.
 
Dennis Alwon said:
They also don't like it to be known that they are messing with animals
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Around here, a "normal" looking office building with a roof full of those ventilators, chillers, and other equipment is a dead giveaway that it's a pharmaceutical/animal research type of facility.
 
peter d said:
Around here, a "normal" looking office building with a roof full of those ventilators, chillers, and other equipment is a dead giveaway that it's a pharmaceutical/animal research type of facility.
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Just don't believe the sign on the door for free pet sitting.
 
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