I married a business major. A makeup artist when we met and now a contract analyst for a telecom company. Business majors look at the whole pie while engineers look at the pieces. We have our occassional head butting sessions but overall we learned to compromise. I remember our biggest nastiest...
MintJulip, thanks for pointing that out.
For some reason I thought delta T applies to any temperature scale.
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A green thought..."We don't inherit the earth from our ancestors, we borrow it from our children." (unknown)
You are not allowed to post homework questions on the forum. But I will help you out anyway.
Q [BTU/hr] = 1.08 x CFM x (delta Temp)
Delta Temp = Q / (1.08 x CFM)
Change the electric heater capacity to BTU (1KW = 3412 BTU)
Delta Temp = 3412 / (1.08 x 2500) = 1.26 deg
Entering air temp =...
"It may make sense, but it doesn't make for a good building. I wouldn't want to live or work in the jurisdiction you are under, as every building would comply only with the year it was built.
Almost impossible means that it can be done. I should hope that you make the best engineering...
In commercial cooling load estimation and HVAC design, we view computers, printers, scanners and most other office equip as black boxes. We dont care what goes on inside these devices. We are mainly concerned with how the overall operation of these equip will affect the room or space conditions...
I recommend talking with the manufacturer. As ASHRAE states, "heat gains from medical equipment is very specific and varies greatly from application to application."
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A green thought..."We don't inherit the earth from our ancestors, we borrow it from our children." (unknown)
First the NFPA 96 is a guide and NOT the code. You will need to check your local jurisdiction whether fire sprinkler in grease ducts are required.
Taken from NFPA 13, 2007 ed. 7.10.3.4.1 Where ducts do not exceed 75 ft (22.86 m) in length and the entire exhaust duct is protected in accordance...
I think steel supply grille will be fine. THe question is what type of face...perf, egg-crate, etc.
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A green thought..."We don't inherit the earth from our ancestors, we borrow it from our children." (unknown)
Normal Grease exhaust is about 110F - 140F. When selecting a fan, it is best to select a fan that has a max operating temp of at least 250F. This will allow the fan to operate in the event of a fire.
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A green thought..."We don't inherit the earth from our ancestors, we borrow it from our...
You are correct. ESP is the measure of static pressure losses from ductwork, fittings, dampers, grilles and any other devices located in the airstream.
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A green thought..."We don't inherit the earth from our ancestors, we borrow it from our children." (unknown)
"I have another questions, When you have calculated your solar heat gains and internal gains. I get Sensible and Latent total. Why is it that for selecting fan coil units you only have to specify the sensible loads and not the total loads which inlcudes the latent?"
The sensible heat directly...
If you do proceed with exhausting the telecom room instead of cooling it, remember to exhaust more CFM than what is required to cool the room at 55F. This is because the air in the room will be transferred in from another space and therefore is warmer.
A green thought..."We don't inherit the...
