Trace 3D Plus
User Guide
 
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Curve tab

Drybulb Effectiveness Modifier Curve
This curve modifies the drybulb effectiveness by multiplying the design effectiveness value by the result of this curve. The curve is evaluated low fraction as independent variable. The flow fraction is the ratio of sum of the primary and secondary flow rates divided by the sum of the design flow rates. If this input field is left blank, the effectiveness is assumed to be constant.
 
Wetbulb Effectiveness Modifier Curve
This curve modifies the wetbulb effectiveness by multiplying the design effectiveness value by the result of this curve. The curve is evaluated low fraction as independent variable. The flow fraction is the ratio of sum of the primary and secondary flow rates divided by the sum of the design flow rates. If this input field is left blank, the effectiveness is assumed to be constant.
 
Fan Power Curve
The normalized curve modifies the design secondary air fan power in the previous field by multiplying the value by the result of this curve. The normalized curve is a function of the secondary side flow fraction as independent variable. The flow fraction is the secondary air flow rate during operation divided by Secondary Design Air Flow Rate. If this input field is left blank, the fan power is assumed to be constant.
 
Pump Power Curve
This curve modifies the pump electric power in the previous field by multiplying the design power by the result of this curve. The normalized curve is a function of the secondary side flow fraction as independent variable. The flow fraction is the secondary air flow rate during operation divided by Secondary Design Air Flow Rate.