Performance Curves¶

21 object types from idfpy.models.curves · EnergyPlus 26.2

Curve:Bicubic¶

from idfpy.models import CurveBicubic

Cubic curve with two independent variables. Input consists of the curve name, the ten coefficients, and the minimum and maximum values for each of the independent variables. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*x + C3*x**2 + C4*y + C5*y**2 + C6*x*y + C7*x**3 + C8*y**3 + C9*x**2*y + C10*x*y**2

Curve:Biquadratic¶

from idfpy.models import CurveBiquadratic

Quadratic curve with two independent variables. Input consists of the curve name, the six coefficients, and min and max values for each of the independent variables. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*x + C3*x**2 + C4*y + C5*y**2 + C6*x*y

Curve:ChillerPartLoadWithLift¶

from idfpy.models import CurveChillerPartLoadWithLift

This chiller part-load performance curve has three independent variables. Input consists of the curve name, the twelve coefficients, and the maximum and minimum valid independent variable values. Optional inputs for the curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*x + C3*x**2 + C4*y + C5*y**2 + C6*x*y + C7*x**3 + C8*y**3 + C9*x**2*y + C10*x*y**2 + C11*x**2*y**2 + C12*z*y**3 x = dT* = normalized fractional Lift = dT / dTref y = PLR = part load ratio (cooling load/steady state capacity) z = Tdev* = normalized Tdev = Tdev / dTref Where: dT = Lift = Leaving Condenser Water Temperature - Leaving Chilled Water Temperature dTref = dT at the reference condition Tdev = Leaving Chilled Water Temperature - Reference Chilled Water Temperature

Curve:Cubic¶

from idfpy.models import CurveCubic

Cubic curve with one independent variable. Input for a cubic curve consists of the curve name, the 4 coefficients, and the maximum and minimum valid independent variable values. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*x + C3*x**2 + C4*x**3

Curve:CubicLinear¶

from idfpy.models import CurveCubicLinear

Cubic-linear curve with two independent variables. Input consists of the curve name, the six coefficients, and min and max values for each of the independent variables. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = (C1 + C2*x + C3*x**2 + C4*x**3) + (C5 + C6*x)*y

Curve:DoubleExponentialDecay¶

from idfpy.models import CurveDoubleExponentialDecay

Double exponential decay curve with one independent variable. Input consists of the curve name, the five coefficients, and the maximum and minimum valid independent variable values. Optional inputs for the curve minimum and maximum may be used to limit the output of the performance curve. curve = C1+C2*exp(C3*x)+C4*exp(C5*x)

Curve:Exponent¶

from idfpy.models import CurveExponent

Exponent curve with one independent variable. Input for a exponent curve consists of the curve name, the 3 coefficients, and the maximum and minimum valid independent variable values. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*x**C3 The independent variable x is raised to the C3 power, multiplied by C2, and C1 is added to the result.

Curve:ExponentialDecay¶

from idfpy.models import CurveExponentialDecay

Exponential decay curve with one independent variable. Input consists of the curve name, the three coefficients, and the maximum and minimum valid independent variable values. Optional inputs for the curve minimum and maximum may be used to limit the output of the performance curve. curve = C1+C2*exp(C3*x)

Curve:ExponentialSkewNormal¶

from idfpy.models import CurveExponentialSkewNormal

Exponential-modified skew normal curve with one independent variable. Input consists of the curve name, the four coefficients, and the maximum and minimum valid independent variable values. Optional inputs for the curve minimum and maximum may be used to limit the output of the performance curve. curve = see Input Output Reference

Curve:FanPressureRise¶

from idfpy.models import CurveFanPressureRise

Special curve type with two independent variables. Input for the fan total pressure rise curve consists of the curve name, the four coefficients, and the maximum and minimum valid independent variable values. Optional inputs for the curve minimum and maximum may be used to limit the output of the performance curve. curve = C1*Qfan**2+C2*Qfan+C3*Qfan*(Psm-Po)**0.5+C4*(Psm-Po) Po assumed to be zero See InputOut Reference for curve details

Curve:Functional:PressureDrop¶

from idfpy.models import CurveFunctionalPressureDrop

Sets up curve information for minor loss and/or friction calculations in plant pressure simulations Expression: DeltaP = {K + f*(L/D)} * (rho * V^2) / 2

Curve:Linear¶

from idfpy.models import CurveLinear

Linear curve with one independent variable. Input for the linear curve consists of a curve name, the two coefficients, and the maximum and minimum valid independent variable values. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*x

Curve:QuadLinear¶

from idfpy.models import CurveQuadLinear

Linear curve with four independent variables. Input for the linear curve consists of a curve name, the two coefficients, and the maximum and minimum valid independent variable values. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*w + C3*x + C4*y + C5*z

Curve:Quadratic¶

from idfpy.models import CurveQuadratic

Quadratic curve with one independent variable. Input for a quadratic curve consists of the curve name, the three coefficients, and the maximum and minimum valid independent variable values. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*x + C3*x**2

Curve:QuadraticLinear¶

from idfpy.models import CurveQuadraticLinear

Quadratic-linear curve with two independent variables. Input consists of the curve name, the six coefficients, and min and max values for each of the independent variables. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = (C1 + C2*x + C3*x**2) + (C4 + C5*x + C6*x**2)*y

Curve:Quartic¶

from idfpy.models import CurveQuartic

Quartic (fourth order polynomial) curve with one independent variable. Input for a Quartic curve consists of the curve name, the five coefficients, and the maximum and minimum valid independent variable values. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*x + C3*x**2 + C4*x**3 + C5*x**4

Curve:QuintLinear¶

from idfpy.models import CurveQuintLinear

Linear curve with five independent variables. Input for the linear curve consists of a curve name, the two coefficients, and the maximum and minimum valid independent variable values. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = C1 + C2*v + C3*w + C4*x + C5*y + C6*z

Curve:RectangularHyperbola1¶

from idfpy.models import CurveRectangularHyperbola1

Rectangular hyperbola type 1 curve with one independent variable. Input consists of the curve name, the three coefficients, and the maximum and minimum valid independent variable values. Optional inputs for the curve minimum and maximum may be used to limit the output of the performance curve. curve = ((C1*x)/(C2+x))+C3

Curve:RectangularHyperbola2¶

from idfpy.models import CurveRectangularHyperbola2

Rectangular hyperbola type 2 curve with one independent variable. Input consists of the curve name, the three coefficients, and the maximum and minimum valid independent variable values. Optional inputs for the curve minimum and maximum may be used to limit the output of the performance curve. curve = ((C1*x)/(C2+x))+(C3*x)

Curve:Sigmoid¶

from idfpy.models import CurveSigmoid

Sigmoid curve with one independent variable. Input consists of the curve name, the five coefficients, and the maximum and minimum valid independent variable values. Optional inputs for the curve minimum and maximum may be used to limit the output of the performance curve. curve = C1+C2/[1+exp((C3-x)/C4)]**C5

Curve:Triquadratic¶

from idfpy.models import CurveTriquadratic

Quadratic curve with three independent variables. Input consists of the curve name, the twenty seven coefficients, and min and max values for each of the independent variables. Optional inputs for curve minimum and maximum may be used to limit the output of the performance curve. curve = a0 + a1*x**2 + a2*x + a3*y**2 + a4*y + a5*z**2 + a6*z + a7*x**2*y**2 + a8*x*y + a9*x*y**2 + a10*x**2*y + a11*x**2*z**2 + a12*x*z + a13*x*z**2 + a14*x**2*z + a15*y**2*z**2 + a16*y*z + a17*y*z**2 + a18*y**2*z + a19*x**2*y**2*z**2 + a20*x**2*y**2*z + a21*x**2*y*z**2 + a22*x*y**2*z**2 + a23*x**2*y*z + a24*x*y**2*z + a25*x*y*z**2 +a26*x*y*z