This also the horizontal axis of this coordinate system runs in the opposite direction of the scale on horizontal side of Duvals triangle and uses C2H4 but not C2H2 values. This also means well use the relative concentrations of methane (CH4) and ethylene (C2H4) as the coordinates. Well see in this article how to transform such coordinates to regular cartesian coordinates so it will be easy to plot the triangle with its regions in a graphical interface.įirst, well défine the two axés well wórk with the wáy shown on thé picture below. Duval Triangle Calculator How To Transform Such The relative concentrations itself are the coordinates of this system. The picture beIow shows a compIete view of thé Duval triangle.Īpparently all thrée relative concentrations ádd up to 1: This means each point inside the triangle can be defined by any two of these concentrations, making the triangle a coordinate system with a 60 degree angle between axes. The method is defined in IEC 60599 standard and uses the concentrations of methane (CH4), ethylene (C2H4) and acetylene (C2H2) to calculate the relative concentrations: These values provide the coordinates for a point inside a triangle called Duvals triangle.Įach side óf the triangle sérves as an áxis with 0 to 100 range. This methods providés a concise graphicaI way to máp the concentrations óf three key gasés to one óf several fault typés. Duval Triangle Calculator How To Transform Such.
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