17 мар. 2009 г. · This page describes some basic math for calculating the potential collection of a rainwater harvesting system. Collection calculations · Tips · Pipe sizing calculations |
Divide the length of the gutter to the outlet in mm (I) by the depth of the gutter in mm (d). · Consult table 3 to get the next highest reduction factor. |
The runoff equation is Q = C*I*A/3600. Where Q is L/s: I is mm/hr; A is sqm. To use this in the program without paying me any money, make the Area equal 3600, ... |
Оценка 5,0 (1) The total flow rate is then multiplied by the number of houses to size the pipe diameter using a flow rate graph. |
Calculating effective roof areas where gutter angles are installed. Effect of angles – If a length of eaves gutter includes an angle, the flow in the gutter. |
Take the roof's total square footage and divide by the total square footage handled by one drain. The result is the number of drains needed. |
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