yankee shower design€¦ · patternator test results-300 -200 -100 0 100 200 300 target position...

41
Yankee Shower Design A New Perspective Presented by: Ralph Lichtenberg Tissue and Towel Applications Project Manager Solenis

Upload: others

Post on 26-Sep-2020

0 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Yankee Shower DesignA New Perspective

Presented by:Ralph LichtenbergTissue and Towel Applications Project ManagerSolenis

Page 2: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Safety First!

Interlock Yankee showers

Showers must not run on a stationary dryer

Page 3: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Some Background

• Before mid 1980’s - Yankee showers uncommon– Yankee coating from wet end– Poor control– Grade dependent

• Yankee showers are now standard– Large effort in chemistry – ongoing– Little development of showering dynamics

Page 4: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Yankee Coating Objectives1. Uniformity across dryer

» Shower geometry» Nozzle selection» Header pressure

2. Droplet size distribution» Nozzle selection» Header pressure

3. Water spray volume (condensing load)» Nozzle selection» Header pressure

Page 5: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Classical Shower Header Design• Step 1

Page 6: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

D

αh

Page 7: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Single Coverage

D

Page 8: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Single Coverage

D

D

Page 9: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Single Coverage

D

D

Page 10: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Double Coverage

½ D

D

Page 11: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Double Coverage

½ D

D

Page 12: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Triple Coverage

⅓ D

D

Page 13: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Uniform Coverage

00.5

11.5

2

3 8 13 18 23 28

Page 14: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

0

05

01

15

0 10 20 30 40 50 60 70 80 90 100

Uniform CoverageCoverage assumption…

FlatUniform

Exact1X, 2X, 3XCoverage

Page 15: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

0

5

1

5

0 10 20 30 40 50 60 70 80 90 100

Shower PerformanceCoverage assumption…

Parabolic

Page 16: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance

0.00

0.05

0.10

0.15

0.20

0.25

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170

Spray Delivery Ra

te (G

PH)

in1/4" W

ide Increm

entsat Indicated Po

sitio

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Spray Pattern

Double Coverage

Page 17: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170

Spray Delivery Ra

te (G

PH)

in1/4" W

ide Increm

entsat Indicated Po

sitio

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Spray Pattern

Triple Coverage

Page 18: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

0

5

1

5

2

5

0 10 20 30 40 50 60 70 80 90 100

Shower PerformanceCoverage assumption…

NormalDistribution

Page 19: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance

0.00

0.05

0.10

0.15

0.20

0.25

0.30

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170

Spray Delivery Ra

te (G

PH)

in1/4" W

ide Increm

entsat Indicated Po

sitio

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Spray Pattern

Double Coverage

Page 20: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170

Spray Delivery Ra

te (G

PH)

in1/4" W

ide Increm

entsat Indicated Po

sitio

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Spray Pattern

Triple Coverage

Page 21: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Patternation

Page 22: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Patternator Test Results

-300 -200 -100 0 100 200 300Target Position - Millimeters from Centerline

Test Curve, 7" to Target, 60 PSI

0%

2%

4%

6%

8%

10%

12%

14%

-300 -200 -100 0 100 200 300

Spra

y Vo

lum

e Pe

rcen

t

Target Position - Millimeters from Centerline

Spray Flow Distribution Data

Mfg. Curve, 10" to Target, 3 Bar (43.5 PSI)

-300 -200 -100 0 100 200 300Target Position - Millimeters from Centerline

Test Curve, 7" to Target, 40 PSI

Page 23: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Yankee Nozzle Survey

0%

10%

20%

30%

40%

50%

60%

70%

Page 24: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

0

2

4

6

8

0

10 8 6 4 2 0 2 4 6 8 10

Shower Performance – 11001, 60 psi, 6-inches

Coverage assumption…

ActualPer Spraying Systems Test Number 2009T12

Page 25: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Double Coverage10” centers

Page 26: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance – 11001 - DOUBLE

0.00

0.05

0.10

0.15

0.20

0.25

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170

Spray Delivery Ra

te (G

PH)

in1/4" W

ide Increm

entsat Indicated Po

sitio

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Spray Pattern

Page 27: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Triple Coverage6.7” centers

Page 28: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance – 11001 - TRIPLE

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170

Spray Delivery Ra

te (G

PH)

in1/4" W

ide Increm

entsat Indicated Po

sitio

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Spray Pattern

Page 29: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Optimized Coverage5.7” centers

Page 30: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance – 11001 - OPTIMIZED

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270

Spray Delivery Ra

te (G

PH)

in~1/4" W

ide Increm

ents at Ind

icated

 Position

 

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Assessment

Page 31: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Case StudyOld shower graph New shower graph

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200

Spray Delivery Ra

te (G

PH)

in~1/4" W

ide Increm

ents at Ind

icated

 Position

 

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Assessment

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200

Spray Delivery Ra

te (G

PH)

in~1/4" W

ide Increm

ents at Ind

icated

 Position

 Yankee Dryer Face Position (Inches)

Yankee Coating Shower Assessment

Page 32: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Case Study

Coating Appearance

Coating Flow

After

Uniform

4.0 mg/m2

Before

Streaky

6.4 mg/m2

Page 33: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Coefficient of Variance

0.00

0.05

0.10

0.15

0.20

0.25

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170

Spray Delivery Ra

te (G

PH)

in1/4" W

ide Increm

entsat Indicated Po

sitio

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Spray Pattern

Page 34: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance – CV Curve

02468

1012141618

4.0 5.0 6.0 7.0 8.0

Coeffic

ient of V

ariance (%)

Distance from Nozze  Tip to Yankee Surface (inches)

Coefficient of Variance (Cv) for Nozze type ‐ 11001 at 6" Spacing

Page 35: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance – CV Map

4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.04.0 7.77 3.3 2.61 2.61 3.31 2.09 0.78 1.42 1.42 0.92 1.87 48 3.194.5 18.9 7.77 3.3 2.61 1.7 3.31 2.99 2.09 0.78 1.42 1.42 41 2.735.0 24.5 15.7 7.77 3.3 3.49 1.7 2.61 3.31 2.99 2.09 0.78 37 2.475.5 23.7 23.1 15.7 7.77 2.33 3.49 1.7 2.61 3.31 2.99 2.09 34 2.276.0 19.4 24.5 21.8 15.7 7.77 2.33 3.49 2.61 1.7 3.31 3.31 31 2.076.5 15.5 22.1 24.7 21.8 15.7 7.77 2.33 3.49 2.61 1.7 2.61 29 1.937.0 11.6 17.9 23.7 24.5 21.8 11.7 7.77 2.33 3.3 2.61 1.7 27 1.807.5 10.4 14.4 19.4 24.5 24.5 18.9 11.7 7.77 2.33 3.3 3.49 25 1.678.0 12.3 11.6 16.5 22.1 24.5 23.1 18.9 11.7 7.77 2.33 3.3 24 1.608.5 17.2 10.4 14.4 17.9 22.1 24.7 23.1 18.9 11.7 7.77 2.33 22 1.479.0 23.1 12.3 10.9 15.5 19.4 23.7 24.5 21.8 18.9 11.7 7.77 20 1.339.5 15.5 10.4 12.9 16.5 20.6 24.5 24.5 21.8 15.7 11.7 19 1.2710.0 21.1 12.3 10.9 14.4 19.4 22.1 24.5 24.5 21.8 15.7 19 1.27

Cv Table for 1100067 nozzles at 40 psig Number of 

Nozzles Required

Total Shower Flow (gpm)

Spacing (inches)

Nozzle to Target Distance (inches)

Page 36: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Oscillation

• Proper spray distribution – no oscillation needed

• Poor spray distribution – oscillation may help … or hurt

• To compensate for poor spray:

– Stroke = ½ nozzle spacing– Linear oscillator, not sinusoidal “crank arm”

Page 37: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance6-inch nozzle spacing

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270

Spray Delivery Ra

te (G

PH)

in~0.14" W

ide Increm

ents at Ind

icated

 Position

 

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Assessment

Page 38: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance6-inch nozzle spacing 4-inch oscillation

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270

Spray Delivery Ra

te (G

PH)

in~0.14" W

ide Increm

ents at Ind

icated

 Position

 

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Assessment

Page 39: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Shower Performance6-inch nozzle spacing 3-inch oscillation

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

‐10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270

Spray Delivery Ra

te (G

PH)

in~0.14" W

ide Increm

ents at Ind

icated

 Position

 

Yankee Dryer Face Position (Inches)

Yankee Coating Shower Assessment

Page 40: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Summary

• Safety first! – Interlock Yankee showers

• Single, Double, Triple coverage ≠ good coverage

• Optimization requires patternation

• Optimization means minimization of Cv

• Oscillation is not necessary for an optimized shower

Page 41: Yankee Shower Design€¦ · Patternator Test Results-300 -200 -100 0 100 200 300 Target Position -Millimeters from Centerline Test Curve, 7" to Target, 60 PSI 0% 2% 4% 6% 8% 10%

Thank youPRESENTED BY

Ralph LichtenbergTissue and Towel Applications Project [email protected]

Yankee Shower Designa New Perspective