I used Blast software for energy modeling several years ago, and it was a good one. It was developed by university of illinois, urbana champion. I heard Blast then was combined with DOE energy analysis software...
Let me clarify: The fan is radial blade pressure blower, and it is a centrifugal fan. The fan selection should be all right.
My situation now is that I want to add the bypass modulating valve to relieve certain amount of air that the system does not need, in order to avoid surging in case all...
Thanks! Trashcanman(???).
The AHU manufacturer selected the radial fan, and I am not quite sure the reason. You've got a good point, and I will ask them this question.
My situation is: The fan has been installed, and has no problem to provide 900 cfm at 50" static pressure. The problem occurs...
We designed a central cold air system, in which a radial fan with VFD is used to deliver 900 cfm at 50 inch static pressure. The air is to serve five outlets with 180 cfm each at 45 inch constant static pressure. Any of these five outlet can be closed by a butterfly damper any time, in other...
In the project I am working on, the client wants to use the existing PVC duct in stock for clean cold air delivery. But at that specific size, the velocity of air flowing through the PVC duct will go up to 3500 fpm (it is not fume exhaust application, no any hazard particles in the air stream)...
Thanks,LSAxDesigner. It is good point to provide negative pressure at the wash booth. What I am trying to figure out is how much cooling the wash booth needs to keep it at 75 deg F. I came up the formular: total cooling load in Btu/hr = 10 gpm (total hot water flow through spray nuzzlers) * 500...
I am working on a project, and need to estimate how much heat is generated from the wash station using hot water spray at 100 F. The overall flow of the hot water spray is 5 gpm. If the wash station is exhausted at 3 cfm/sq ft, do I still need to cool the space? The wash station is enclosed in...
I am working on a project, and need a wet vacuum system - vacuum water off the surface of the vehicle after the washing process inside a washing booth. Does anyone know any manufactures dealing with this kind of vacuum? In order to separate the water, does the traditional cyclone separator work...
Thanks, walkes and cme. Per my understanding, International Mechanical Code restricts the use of PVC ductwork/piping to be underground only. Similar to Uniform Mechanical Code, it requires plastic duct/piping in the return plenum to meet 25/50 requirement and there is no exception (it does not...
Can anyone help me with the code (united mechanical code and international code) limitation on the use of PVC duct? The PVC duct is used to supply conditioned air (not exhaut) and it is to be routed inside of the return plenum. The plenum is sprinkler protected.
How can I decide how many risers to install for an area with 50,000 sq ft? Just one is enough since the area is within the limitation 52,000 sq ft? Please help!
What's design guide for offsets of stack and vent in domestic plumbing system? The house is only three-story. IPC has sections only for offsets of five stories or more.
Thanks in advance!
I am working on a project of three-story house plumbing design. Need some guidance and want to know anyone could tell me what's the best resources, any plumbing book for example? Thanks in advance.
Thank you all for the responses.
But what is the best way to install the smoke detector in the discharge side of the fan so it can hold 50" static pressure?
Per "1997 Standard Mechanical Code", recirculating air system with a fan capacity great than 2000 cfm shall automatically shut down by means of an approved smoke detector placed in the return air stream. Could anyone explain to me why only return air stream, not discharge air stream...
