We are having a discussion about duct diameters, and so I have a short question about Ductwork. Is there a generally accepted convention that understands that listing the size of a duct, automatically identifies the ID or OD of the duct? If so, which one? Is the convention the same for HVAC...
What is a recommended pressure in the distribution header of a packaged cooling tower with 6-8 cells? The flow is balanced at each cell by a manual butterfly valve. I've been told to use 30 psig, but that seems like a lot of pump HP to waste. Will there be problems if I design the header...
A client has asked if there is a computer program for Industrial Ventilation. The client is primarily interested in dust collection systems. A typical system has several hoods (different types) branch ducts, elbows, tees, main duct, collector, fan, etc. Can anyone recommend a program.
Recommendations for journal bearing & pin design: mat'l, pin surface finish & hardness, design contact pressure, lubrication. The draw bar linkage mechanism has very high loads >500,000 lbs and moves very slowly so that velocity and angular travel <30deg between the pins and bushings is very...
Is there a 'standard' for the design of guyed stacks published by some organization? I am familar with wind pressures (25-33 lbs/sqft - 100mph) and wind loads (pressure x projeted area). I am less familar with accepted methods of calculating critical buckling loads...
