Quote:
Originally Posted by jengineer  mm = millimeters
cm = centimeters
conversion from C to K is C +273.15
You sure coefficient is correct? most chimney are more like the photo...The effective coefficient of discharge for flow nozzles in pipelines varies from 0.96 to 1.2 for turbulent flow and increases as the throat-to-pipe-diameter ratio increases. C in our systems will vary due to some folks using angle brackets and others making a smoother trend. |
I knew I could find an engineer on the forum. I am just the guy who bubble gums these things together. Kind of a close enough approach for our purposes. I used 273 as the conversion to K and built it into the worksheet as most of the builders work in degrees C . I used 0.7 as the coefficient based on the information I had on hand. I figured that even if the modeling was not exact it could prove to be a useful preditive tool for oven builders. For example, I found that the difference between a 6 inch and an 8 inch round flue pipe is that an 8 inch has almost double the draw for the same height.
Please feel free to correct and repost. The worksheet was intended as a starting point, not a finished product.
Engineers !!!!
ON YOUR MARK
GET SET
CALCULATE !!!
