private double CalculateTotalCollectionEfficiency(ArrayList particleDistributionList)
{
double cutDiameter = cutParticleDiameter.Value;
double collectionEff;
double pDiameter;
double diamRatio;
double totalEfficiency = 0.0;
double loading = owner.InletParticleLoading.Value;
if (loading == Constants.NO_VALUE)
{
loading = owner.CalculateParticleLoading(owner.GasInlet);
}
foreach (ParticleSizeFractionAndEfficiency psf in particleDistributionList)
{
pDiameter = psf.Diameter.Value;
diamRatio = pDiameter / cutDiameter;
collectionEff = CycloneUtil.CalculateCollectionEfficiency(diamRatio, inletConfiguration);
collectionEff = CycloneUtil.CorrectedCollectionEfficiency(collectionEff, particleType, loading);
totalEfficiency += collectionEff * psf.WeightFraction.Value;
//psf.ToCutDiameterRatio.Value = diamRatio;
psf.Efficiency.Value = collectionEff;
}
return(totalEfficiency);
}
public void DoRatingCalculation()
{
double volumeFlow = owner.GasInlet.VolumeFlowRate.Value;
double inletW = inletWidth.Value;
double inletH = inletHeight.Value;
double inletHToWRatio = inletHeightToWidthRatio.Value;
double diamOutlet = outletInnerDiameter.Value;
double wallThicknessOutlet = outletWallThickness.Value;
double diamCyclone = cycloneDiameter.Value;
int numOfCyclones = numberOfCyclones.Value;
volumeFlow /= numOfCyclones;
double outletTL = outletTubeLengthBelowRoof.Value;
double outletTLToInletHRatio = outletBelowRoofToInletHeightRatio.Value;
double loading = owner.InletParticleLoading.Value;
if (loading == Constants.NO_VALUE)
{
loading = owner.CalculateParticleLoading(owner.GasInlet);
}
if (inletW != Constants.NO_VALUE && inletHToWRatio != Constants.NO_VALUE)
{
inletH = inletW * inletHToWRatio;
ownerUnitOp.Calculate(inletHeight, inletH);
}
else if (inletW != Constants.NO_VALUE && inletH != Constants.NO_VALUE)
{
inletHToWRatio = inletH / inletW;
ownerUnitOp.Calculate(inletHeightToWidthRatio, inletHToWRatio);
}
else if (inletH != Constants.NO_VALUE && inletHToWRatio != Constants.NO_VALUE)
{
inletW = inletH / inletHToWRatio;
ownerUnitOp.Calculate(inletWidth, inletW);
}
if (inletH != Constants.NO_VALUE && outletTLToInletHRatio != Constants.NO_VALUE)
{
outletTL = inletH * outletTLToInletHRatio;
ownerUnitOp.Calculate(outletTubeLengthBelowRoof, outletTL);
}
else if (inletH != Constants.NO_VALUE && outletTL != Constants.NO_VALUE)
{
outletTLToInletHRatio = outletTL / inletH;
ownerUnitOp.Calculate(outletBelowRoofToInletHeightRatio, outletTLToInletHRatio);
}
else if (outletTL != Constants.NO_VALUE && outletTLToInletHRatio != Constants.NO_VALUE)
{
inletH = outletTL / outletTLToInletHRatio;
ownerUnitOp.Calculate(inletHeight, inletH);
}
if (diamOutlet != Constants.NO_VALUE && wallThicknessOutlet != Constants.NO_VALUE && inletW != Constants.NO_VALUE &&
diamCyclone == Constants.NO_VALUE)
{
diamCyclone = 2.0 * inletW + diamOutlet + 2.0 * wallThicknessOutlet;
ownerUnitOp.Calculate(cycloneDiameter, diamCyclone);
}
double inletArea = Constants.NO_VALUE;
double outletArea = Constants.NO_VALUE;
double inletV = Constants.NO_VALUE;
double numOfTurns = Constants.NO_VALUE;
double viscGas = owner.GasInlet.GetGasViscosity(owner.GasInlet.Temperature.Value);
double densityParticle = ParticleDensity.Value;
double densityGas = owner.GasInlet.Density.Value;
double cutDiameter = cutParticleDiameter.Value;
double collectionEff = owner.CollectionEfficiency.Value;
double temp;
//if (volumeFlow != Constants.NO_VALUE && viscGas != Constants.NO_VALUE) {
//the above condition has already been guarded by IsRatingCalcReady()
if (inletW != Constants.NO_VALUE && inletH != Constants.NO_VALUE)
{
inletArea = inletW * inletH;
if (diamOutlet != Constants.NO_VALUE)
{
outletArea = Math.PI * diamOutlet * diamOutlet / 4.0;
inletArea = inletArea < outletArea ? inletArea : outletArea;
}
inletV = volumeFlow / inletArea;
numOfTurns = CalculateNumOfTurns(inletV);
cutDiameter = Math.Sqrt(9 * viscGas * inletW / (Math.PI * numOfTurns * inletV * (densityParticle - densityGas)));
ownerUnitOp.Calculate(cutParticleDiameter, cutDiameter);
ownerUnitOp.Calculate(inletVelocity, inletV);
collectionEff = CalculateTotalCollectionEfficiency(particleSizeFractionAndEfficiencyList);
ownerUnitOp.Calculate(owner.CollectionEfficiency, collectionEff);
//solveState = SolveState.Solved;
//if (dp != Constants.NO_VALUE) {
// double diamRatio = cutDiameter/dp;
// collectionEff = 1.0/(1.0 + diamRatio * diamRatio);
// Calculate(collectionEfficiency, ce);
// solveState = SolveState.Solved;
//}
}
else if (cutDiameter != Constants.NO_VALUE && inletHToWRatio != Constants.NO_VALUE && inletW == Constants.NO_VALUE)
{
//double diamRatio = cutDiameter/dp;
//collectionEff = 1.0/(1.0 + diamRatio * diamRatio);
collectionEff = CalculateTotalCollectionEfficiency(particleSizeFractionAndEfficiencyList);
ownerUnitOp.Calculate(owner.CollectionEfficiency, collectionEff);
//Assume initail number of spirals is 3.5
numOfTurns = 3.5;
int i = 0;
double inletWOld = 0;
double diff;
do
{
i++;
temp = cutDiameter * cutDiameter * Math.PI * numOfTurns * volumeFlow * (densityParticle - densityGas) / (9.0 * viscGas * inletHToWRatio);
inletW = Math.Pow(temp, 1.0 / 3.0);
inletV = volumeFlow / (inletW * inletW * inletHToWRatio);
numOfTurns = CalculateNumOfTurns(inletV);
diff = inletW - inletWOld;
inletWOld = inletW;
} while (i <= 500 && Math.Abs(diff) > 1.0e-6);
if (i < 500)
{
ownerUnitOp.Calculate(inletWidth, inletW);
ownerUnitOp.Calculate(inletHeight, inletW * inletHToWRatio);
ownerUnitOp.Calculate(inletVelocity, inletV);
}
if (diamOutlet != Constants.NO_VALUE && wallThicknessOutlet != Constants.NO_VALUE && inletW != Constants.NO_VALUE &&
diamCyclone == Constants.NO_VALUE)
{
diamCyclone = 2.0 * inletW + diamOutlet + 2.0 * wallThicknessOutlet;
ownerUnitOp.Calculate(cycloneDiameter, diamCyclone);
}
}
//}
double vesselDiam = externalVesselDiameter.Value;
if (loading != Constants.NO_VALUE && inletV != Constants.NO_VALUE &&
densityGas != Constants.NO_VALUE && vesselDiam != Constants.NO_VALUE &&
inletW != Constants.NO_VALUE && inletH != Constants.NO_VALUE)
{
double vesselArea = Math.PI * vesselDiam * vesselDiam / 4.0;
double vesselV = volumeFlow / vesselArea;
vesselArea /= numOfCyclones;
double areaRatio = inletArea / vesselArea;
if (areaRatio > 1.0)
{
//something is wrong
}
double contractionFactor = CycloneUtil.CalculateDPContractionFactor(areaRatio);
double dpInletContraction = 0.5 * densityGas * ((1.0 + contractionFactor) * inletV * inletV - vesselV * vesselV);
double dpParticleAcceleration = loading * inletV * (inletV - vesselV);
double diamInlet = 4.0 * inletW * inletH / (2.0 * (inletW + inletH));
double Re = diamInlet * inletV * densityGas / viscGas;
double frictionFactor = FrictionFactorCalculator.CalculateFrictionFactor(Re);
double dpBarrelFriction = 2.0 * frictionFactor * densityGas * inletV * inletV * Math.PI * diamCyclone * numOfTurns / diamInlet;
double dpGasFlowReversal = densityGas * inletV * inletV / 2.0;
double barrelArea = Math.PI * diamCyclone * diamCyclone / 4.0;
double barrelV = volumeFlow / barrelArea;
double outletV = volumeFlow / outletArea;
areaRatio = inletArea / barrelArea;
if (areaRatio > 1.0)
{
//something is wrong
}
contractionFactor = CycloneUtil.CalculateDPContractionFactor(areaRatio);
double dpOutletContraction = 0.5 * densityGas * ((1.0 + contractionFactor) * outletV * outletV - barrelV * barrelV);
double dpTotal = dpInletContraction + dpParticleAcceleration + dpBarrelFriction + dpGasFlowReversal + dpOutletContraction;
double loadingCorrectionFactor = CycloneUtil.CalculateDPLoadingCorrectionFactor(loading);
dpTotal *= loadingCorrectionFactor;
ownerUnitOp.Calculate(owner.GasPressureDrop, dpTotal);
//ownerUnitOp.BalancePressure(ownerUnitOp.MixtureInlet, ownerUnitOp.FluidOutlet, ownerUnitOp.PressureDrop);
}
double diamDipleg = Constants.NO_VALUE;
double densityBulk = ParticleBulkDensity.Value;
if (loading != Constants.NO_VALUE && volumeFlow != Constants.NO_VALUE &&
densityGas != Constants.NO_VALUE && densityBulk != Constants.NO_VALUE)
{
temp = volumeFlow * loading * Math.Sqrt(Math.Tan(Math.PI * 62.0 / 180)) / (Math.Sqrt(Constants.G) * densityBulk * Math.Sqrt((densityBulk - densityGas) / densityBulk));
diamDipleg = Math.Pow(temp, 0.4);
if (diamDipleg < 0.0254 * 4.0)
{
diamDipleg = 0.0254 * 4.0;
}
ownerUnitOp.Calculate(diplegDiameter, diamDipleg);
}
double vortexLength = Constants.NO_VALUE;
if (diamOutlet != Constants.NO_VALUE && volumeFlow != Constants.NO_VALUE)
{
//FLUIDIZATION, SOLIDS HANDLING, AND PROCESSING--Industrial Applications
//Edited by Wen-Ching Yang, Siemens Westinghouse Power Corporation, Pittsburgh, Pennsylvania
//Chapter 12--Cyclone Desgn, page 779
vortexLength = volumeFlow / (Math.PI * diamOutlet * 5.0);
ownerUnitOp.Calculate(naturalVortexLength, vortexLength);
}
double coneAngleValue = coneAngle.Value / 2.0;
double coneLengthValue = coneLength.Value;
double coneLengthUnderVortex = Constants.NO_VALUE;
if (coneAngleValue != Constants.NO_VALUE && diamDipleg != Constants.NO_VALUE)
{
if (diamCyclone != Constants.NO_VALUE)
{
coneLengthValue = Math.Tan(coneAngleValue) * (diamCyclone - diamDipleg) / 2.0;
ownerUnitOp.Calculate(coneLength, coneLengthValue);
}
if (diamOutlet != Constants.NO_VALUE)
{
double vortexGap = 0.0254 * 2 / Math.Sin(coneAngleValue);
coneLengthUnderVortex = ((diamOutlet - diamDipleg) / 2.0 + vortexGap) * Math.Tan(coneAngleValue);
}
}
if (vortexLength != Constants.NO_VALUE && coneLengthUnderVortex != Constants.NO_VALUE &&
outletTL != Constants.NO_VALUE)
{
double totalLength = vortexLength + coneLengthUnderVortex + outletTL;
ownerUnitOp.Calculate(barrelPlusConeLength, totalLength);
double barrelL = totalLength - coneLengthValue;
ownerUnitOp.Calculate(barrelLength, barrelL);
}
}
