Class CompressorChartAlternativeMapLookupExtrapolate

java.lang.Object

neqsim.process.equipment.compressor.CompressorChart

neqsim.process.equipment.compressor.CompressorChartAlternativeMapLookup

neqsim.process.equipment.compressor.CompressorChartAlternativeMapLookupExtrapolate

All Implemented Interfaces:

Serializable, Cloneable, CompressorChartInterface

Direct Known Subclasses:

CompressorChartKhader2015, PumpChartAlternativeMapLookupExtrapolate

public class CompressorChartAlternativeMapLookupExtrapolate
extends CompressorChartAlternativeMapLookup

CompressorChartAlternativeMapLookupExtrapolate class.

Author:

ESOL

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static org.apache.logging.log4j.Logger	logger	Logger object for class.
private static final long	serialVersionUID	Serialization version UID.

Fields inherited from class CompressorChartAlternativeMapLookup

chartConditions, fanLawCorrectionFunc, gearRatio, isStoneWall, isSurge, reducedHeadFitterFunc, reducedPolytropicEfficiencyFunc, referenceSpeed, refMW, refPressure, refTemperature, refZ

Fields inherited from class CompressorChart

chartSpeeds, chartValues, fanLawCorrectionFitter, flow, flowPolytropicEfficiency, head, maxSpeedCurve, minSpeedCurve, polytropicEfficiency, redflow, redflowPolytropicEfficiency, redhead, redpolytropicEfficiency, reducedFlowFitter, reducedHeadFitter, reducedPolytropicEfficiencyFitter, speed, stoneWallCurve, surgeCurve

Constructor Summary

Constructors

Constructor	Description
CompressorChartAlternativeMapLookupExtrapolate()

Method Summary

Modifier and Type	Method	Description
private double	extrapolateOrInterpolate(double flow, double[] flowData, double[] valueData, org.apache.commons.math3.analysis.polynomials.PolynomialSplineFunction spline)	Extrapolates or interpolates a value based on the given flow using the provided flow data, value data, and polynomial spline function.
private double	extrapolateOrInterpolateSpeed(double speed, double speed1, double speed2, double value1, double value2)	Extrapolates or interpolates a value based on the given speed and two reference speeds with their corresponding values.
ArrayList<Double>	getClosestRefSpeeds(double speed)	getClosestRefSpeeds.
double	getPolytropicEfficiency(double flow, double speed)	Get method for polytropic efficiency from reference curves.
double	getPolytropicHead(double flow, double speed)	Get method for polytropic head from reference curves.
private double	linearInterpolate(double x, double x1, double x2, double y1, double y2)	Performs linear interpolation to estimate the value of y at a given x, based on two known points (x1, y1) and (x2, y2).

Methods inherited from class CompressorChartAlternativeMapLookup

addCurve, addCurve, addSurgeCurve, bisect_left, bisect_left, checkStoneWall, checkSurge1, checkSurge2, getChartConditions, getChartValues, getCurveAtRefSpeed, getFlow, getFlows, getGearRatio, getHeads, getHeadUnit, getMaxSpeedCurve, getMinSpeedCurve, getPolytropicEfficiencies, getSpeed, getSpeeds, getSpeedValue, getStoneWallCurve, getSurgeCurve, isUseCompressorChart, main, plot, polytropicEfficiency, prettyPrintChartValues, setCurves, setCurves, setGearRatio, setHeadUnit, setReferenceConditions, setStoneWallCurve, setSurgeCurve, setUseCompressorChart, setUseRealKappa, useRealKappa

Methods inherited from class CompressorChart

equals, fitReducedCurve, generateStoneWallCurve, generateSurgeCurve, getDischargeTemperatures, getGamma, getInletPressure, getInletTemperature, getPolytropicExponent, getPowers, getPressureRatios, getReferenceDensity, getStoneWallFlowAtSpeed, getStoneWallHeadAtSpeed, getSurgeFlowAtSpeed, getSurgeHeadAtSpeed, hashCode, setGamma, setInletPressure, setInletTemperature, setMaxSpeedCurve, setMinSpeedCurve, setPolytropicExponent, setReferenceDensity

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface CompressorChartInterface

equals, generateStoneWallCurve, generateSurgeCurve, getDischargeTemperatures, getGamma, getInletPressure, getInletStream, getInletTemperature, getOperatingMW, getPolytropicExponent, getPowers, getPressureRatios, getRatioToMaxSpeed, getRatioToMinSpeed, getReferenceDensity, getStoneWallFlowAtSpeed, getStoneWallHeadAtSpeed, getSurgeFlowAtSpeed, getSurgeHeadAtSpeed, hashCode, isHigherThanMaxSpeed, isLowerThanMinSpeed, isSpeedWithinRange, setGamma, setInletPressure, setInletStream, setInletTemperature, setOperatingMW, setPolytropicExponent, setReferenceDensity

Field Details

serialVersionUID

private static final long serialVersionUID

Serialization version UID.

See Also:

• Constant Field Values

logger

static org.apache.logging.log4j.Logger logger

Logger object for class.

Constructor Details

CompressorChartAlternativeMapLookupExtrapolate

public CompressorChartAlternativeMapLookupExtrapolate()

Method Details

getClosestRefSpeeds

public ArrayList<Double> getClosestRefSpeeds(double speed)

getClosestRefSpeeds.

Retrieves the closest reference speeds to the given speed from the compressor chart values. The method returns a list containing one or two speeds: - If the given speed matches a reference speed, the list contains only that speed. - If the given speed is between two reference speeds, the list contains both speeds. - If the given speed is less than the lowest reference speed, the list contains the lowest reference speed. - If the given speed is greater than the highest reference speed, the list contains the highest reference speed.

Overrides:

getClosestRefSpeeds in class CompressorChartAlternativeMapLookup

Parameters:

speed - the speed to find the closest reference speeds for

Returns:

a ArrayList of the closest reference speeds

getPolytropicHead

public double getPolytropicHead(double flow,
 double speed)

Get method for polytropic head from reference curves.

This method interpolates the polytropic head values from reference speeds closest to the given speed and averages them to estimate the polytropic head at the specified flow and speed.

Calculates the polytropic head for a given flow and speed by interpolating or extrapolating between reference compressor curves.

Specified by:

getPolytropicHead in interface CompressorChartInterface

Overrides:

getPolytropicHead in class CompressorChartAlternativeMapLookup

Parameters:

flow - [m3/h], speed in [rpm].

speed - a double

Returns:

polytropic head in unit [getHeadUnit]

getPolytropicEfficiency

public double getPolytropicEfficiency(double flow,
 double speed)

Get method for polytropic efficiency from reference curves.

Calculates the polytropic efficiency of the compressor for a given flow and speed. The method interpolates the efficiency values from reference speed curves and averages them to estimate the efficiency at the specified conditions.

Calculates the polytropic efficiency for a given flow and speed by interpolating or extrapolating between reference compressor curves.

Specified by:

getPolytropicEfficiency in interface CompressorChartInterface

Overrides:

getPolytropicEfficiency in class CompressorChartAlternativeMapLookup

Parameters:

flow - [m3/h], speed in [rpm].

speed - a double

Returns:

polytropic efficiency [%].

extrapolateOrInterpolate

private double extrapolateOrInterpolate(double flow,
 double[] flowData,
 double[] valueData,
 org.apache.commons.math3.analysis.polynomials.PolynomialSplineFunction spline)

Extrapolates or interpolates a value based on the given flow using the provided flow data, value data, and polynomial spline function.

Parameters:

flow - the flow value for which the corresponding value needs to be determined

flowData - an array of flow data points

valueData - an array of value data points corresponding to the flow data points

spline - a polynomial spline function created from the flow and value data points

Returns:

the extrapolated or interpolated value corresponding to the given flow

extrapolateOrInterpolateSpeed

private double extrapolateOrInterpolateSpeed(double speed,
 double speed1,
 double speed2,
 double value1,
 double value2)

Extrapolates or interpolates a value based on the given speed and two reference speeds with their corresponding values.

Parameters:

speed - the speed at which to extrapolate or interpolate the value

speed1 - the first reference speed

speed2 - the second reference speed

value1 - the value corresponding to the first reference speed

value2 - the value corresponding to the second reference speed

Returns:

the extrapolated or interpolated value at the given speed

linearInterpolate

private double linearInterpolate(double x,
 double x1,
 double x2,
 double y1,
 double y2)

Performs linear interpolation to estimate the value of y at a given x, based on two known points (x1, y1) and (x2, y2).

Parameters:

x - the x-value at which to interpolate

x1 - the x-value of the first known point

x2 - the x-value of the second known point

y1 - the y-value of the first known point

y2 - the y-value of the second known point

Returns:

the interpolated y-value at the given x