Download - Tank Spreadsheet

7/28/2019 Tank Spreadsheet

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Tank SpreadsheetInstructions to Users

Guidelines

>The tank turnover time and mixing calculations are not applicable for every tank. The following are guidelines for these calculations:

>Care should be taken to apply these calculations in the following cases:

-- If you do not know the configuration of the tank inlet or if you do not know if there are any baffles inside the tank.

-- If the inlet is located near the tank wall, mixing will be reduced.

-- If the age of the water entering the tank is significantly old, the turnover time will not approximate the water age in the tank.

Date Modified: Modifications & By Whom:

10/24/2003 LDD modified tank worksheets to simplify data entry requirements. Provided space for up to 15 tank fill periods.

9/13/2004 MWS added guidelines

10/6/2004 MWS added Data Summary worksheet

12/13/2004 MWS added Summary, Prioritization, and Analysis worksheets. Also revised Data Input worksheet's error in turnover tim

1/27/2005 MWS added calculations for rectangular tanks. Made minor modifications to all sheets for increased functionality.

-- Cylindrical, rectangular, or hydropillar tanks or tanks

having SCADA that reports changes in volume

-- Height to width ratios less than 1

Tank Mixing Worksheet CAN Be Used On: Turnover Time Worksheet CAN Be Used On:

-- Tanks that operate in a fill/ draw mode

-- Tank inlets oriented horizontally or vertically.

-- Under neutrally buoyant conditions (no temperature

difference between the inlet water and tank water)

Tank Mixing Worksheet CANNOT Be Used On: Turnover Time Worksheet CANNOT Be Used On:

-- All height to width ratios

-- Under any buoyancy conditions (temperature

differences between the inlet water and tank water)

-- If the temperature difference between the water coming into the tank and the water in the tank is significantly different. This may decre

buoyancy.

-- Flow-through tanks (tanks operating with

simultaneous inflow and outflow)

-- Tanks with a submerged inlet.

-- If the storage tank is a standpipe with a height to

diameter ratio greater than 1

-- If the tank is baffled or has pillars.

-- Flow-through tanks (tanks operating with

simultaneous inflow and outflow)

-- Irregular-shaped tanks.

>The purpose of this spreadsheet is to summarize tank characteristics, assess water storage tank turnover time and mixing, and determine

improve turnover time and mixing.

>Enter information into the Summary worksheet about the storage tanks.

>Enter data into the Tank worksheets for the storage tanks in the distribution system. Tank diameter, inlet diameter, and water level changeare required inputs. Water system SCADA data is typically used to determine the changes in tank water levels.

>If the tank mixing calculations (in the Tank worksheet) determine that mixing is poor, the Mixing Analysis should be used to determine solut

>If the tank turnover time calculations (in the Tank worksheet) determine that turnover time is high, the Turnover Time Analysis should be us

operational changes to improve turnover time.

>In situations where the tank is not well mixed or when the mixing calculations cannot be used, the tank turnover time calculations only show

time of the tank. There may be much older "dead-zones" of water in the tank.

-- Tanks that operate in a fi ll/ draw mode

-- Tanks with any inlet orientation and baffling-- Cylindrical, rectangular, or hydropillar tanks or tanks

having SCADA that reports changes in volume

-- Tanks with any inlet/outlet configuration


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Instructions:

I. Tank Characteristics (See Glossary worksheet for illustrations of Tank Characteristics)

**Data must be entered into this section for the spreadsheet to function.

**Do not enter tank dimensions if the tank is NOT cylindrical, rectangular, or hydropillar.

**Hydropillar tanks can be approximated as cylindrical tanks depending on their operating range. See glossary

Alma Perry Hill Girard

Hyde

Park Ryan Rd

1 1 2 2 3

c h c r h

Ifneither, does SCADA report volume (or % full) rather than level (y/n)? n n n n n

32 75 86 30 120

20

1.00 2.00 2.00 2.00 2.00

29 35 25 20 42

fd fd fd fd fd

0.91 0.47 0.29 0.67 0.35

The remaining data is automatically calculated based on the data entered above:

Are the mixing equations applicable?3

yes yes yes yes yes

Are the turnover time calculations applicable?4

yes yes yes yes yes

(if cylindrical/hydropillar/) Tank diameter or (if rectangular) Longest Sidewall

length, D (ft)

(if cylindrical, hydropillar, or rectangular) Maximum Operating

Water Depth, H (ft)

Inlet Diameter, d (ft)

(If rectangular) Shortest Sidewall length, L (ft)

H/D ratio

Is the tank operated fill-draw (fd) or flow-through2

(ft)?

Tank Summary

2. After completing section I, go to the tank worksheets entitled "Tank #1", "Tank #2", etc. Enter the operational data in Step 1 of the works

in Step 1, proceed to Step 2 and 3, if appropriate.

3. If the tank calculations in Step 1 determine that turnover time and/or mixing is poor, Step 2 and 3 of the tank worksheet will determine p

operations. The calculations analyze current operations and develop operational solutions to decrease water age and increase mixing in th

1. Enter tank characteristics into section I below. Section II and III will be populated automatically when data is entered into the tank works

the user are shown in red. Data must be entered into section I for the spreadsheet to function.

Volume (MG)

Name of Tank

Cylindrical (C), Rectangular (R), Hydropillar1

(H), or None of these (n)?


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II. Tank Calculations (from Tank Data Input worksheets)

Turnover Time (days) 5.5 2.0 3.1 5.3 6.1

Mixing Performance Ratio (Measured/ Desired) 0.18 0.80 1.00 1.00 0.60

Notes:

1. Hydropillar tanks can be approximated as cylindrical tanks depending on their operating range. See glossary for illustration.

2. In flow-through operation water is simultaneously coming into the tank and leaving the tank. In fill-draw operation water is can either be

the tank (this is typical of most tanks).

4. If the tank is flow-through the turnover time calculations are not applicable.

**If data is missing the reason could be that the tank mixing equations may not be applicable or the tank may not be cylindrical, h

SCADA that reports volume rather than level.

3. The mixing calculations are not applicable if A) the height to diameter (H/D) ratio is greater than 1, then the tank is considered a standpip

OR C) the tank is irregularly shaped.


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Step 1: Data Input- Tank Turnover and Mixing Calculations

Tank Name: AlmaCylindrical (C), Rectangular

(R), Hydropillar (H), or None of

these (n)? c

Ifneither, does SCADA report

volume (or % full) rather than

level? n

Maximum Water Depth, H: 29 ft

Tank diameter, D: 32 ft

H/D ratio: 0.91

Inlet diameter, d: 1.00 ft

Instructions: Enter tank fill data (obtained from plant SCADA) for up to 15 fill periods. Data inputted by the user are shown in redDate Time Min Level Max Level Date + Time Delta Time

Ft Ft Days

04/07/05 8:12 AM 27.90 4/7/05 8:12

04/07/05 9:09 AM 28.50 4/7/05 9:09 0.04

04/07/05 1:54 PM 27.00 4/7/05 13:54 0.24

04/07/05 3:49 PM 28.60 4/7/05 15:49 0.32

04/07/05 7:50 PM 27.00 4/7/05 19:50 0.48

04/07/05 10:51 PM 28.70 4/7/05 22:51 0.61

04/08/05 6:30 AM 27.00 4/8/05 6:30 0.93

04/08/05 8:40 AM 28.60 4/8/05 8:40 1.02

04/08/05 2:44 PM 26.70 4/8/05 14:44 1.27

04/08/05 5:00 PM 28.60 4/8/05 17:00 1.37

04/08/05 8:50 PM 27.00 4/8/05 20:50 1.53

04/08/05 11:26 PM 28.60 4/8/05 23:26 1.63

04/09/05 8:11 AM 26.70 4/9/05 8:11 2.00

04/09/05 10:55 AM 28.60 4/9/05 10:55 2.1104/09/05 2:26 PM 27.00 4/9/05 14:26 2.26

04/09/05 5:17 PM 28.60 4/9/05 17:17 2.38

04/09/05 8:50 PM 27.00 4/9/05 20:50 2.53

04/09/05 10:51 PM 28.60 4/9/05 22:51 2.61

04/10/05 5:58 AM 27.00 4/10/05 5:58 2.91

04/10/05 8:41 AM 28.60 4/10/05 8:41 3.0

04/10/05 12:02 PM 27.00 4/10/05 12:02 3.2

04/10/05 2:14 PM 28.60 4/10/05 14:14 3.3

04/10/05 5:32 PM 27.00 4/10/05 17:32 3.4

04/10/05 8:35 PM 28.60 4/10/05 20:35 3.5

04/11/05 2:28 AM 27.00 4/11/05 2:28 3.8

04/11/05 4:10 AM 28.60 4/11/05 4:10 3.8

04/11/05 7:00 AM 28.10 4/11/05 7:00 3.9

04/11/05 8:41 AM 28.60 4/11/05 8:41 4.0

04/11/05 2:12 PM 26.70 4/11/05 14:12 4.304/11/05 4:32 PM 28.60 4/11/05 16:32 4.3

Tank #1 Worksheet


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Fill period Low/Min Level High/Max Level Vol at start Vol added Volume drawn

of fill cycle during fill cycle during drain cyc

(ft) (ft) (MG) (MG) (MG)1 27.90 28.50 0.17 0.00

2 27.00 28.60 0.16 0.01 0.01

3 27.00 28.70 0.16 0.01 0.01

4 27.00 28.60 0.16 0.01 0.01

5 26.70 28.60 0.16 0.01 0.01

6 27.00 28.60 0.16 0.01 0.01

7 26.70 28.60 0.16 0.01 0.01

8 27.00 28.60 0.16 0.01 0.01

9 27.00 28.60 0.16 0.01 0.01

10 27.00 28.60 0.16 0.01 0.01

11 27.00 28.60 0.16 0.01 0.01

12 27.00 28.60 0.16 0.01 0.01

13 27.00 28.60 0.16 0.01 0.01

14 28.10 28.60 0.17 0.00 0.00

15 26.70 28.60 0.16 0.01 0.01

Turnover Summary

Avg Vol Added in One Fill Period 0.01 MG Avg Min Water L

Avg Vol Drawn in One Drain Period 0.01 MG Avg Actual VEF

Avg Fill Time 0.09 days Avg VEF Needed

Avg Draw Time 0.21 days Avg Measured W

Avg Fill Rate 67 gpm

Avg Draw Rate 32 gpm

Avg Duration (Fill + Draw Time) 0.3 days

Avg Flow Rate into tank 0.03 MGD

Avg Tank Vol 0.17 MG

Turnover Time 5.5 days

Turnover time is at an undesirable level, use Turnover Time

Analysis (Step 2) to determine operational strategies that

will reduce turnover time.

Desired Water Le

Good Mixing

Inlet Diameter N

Mixing Performa

(Measured/Desir


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Step 2: Turnover Time Analysis

Instructions: Five scenarios are available for experimenting with changing tank operations to improve turnover time. Experimen

only the Min level, and only the Max level. Modify data shown in red. Do not use this analysis if the turnover time equations are

No Changes Scenario A Scenario B Scenario C Scenario DTank diameter 32 32 32 32 32

Inlet Diameter 1.00 1.00 1.00 1.00 1.00

High/Max Level 28.60 28.60 26.00 26.00 28.60

Low/Min Level 27.07 20.00 23.00 20.00 27.07

Level Change 1.53 8.60 3.00 6.00 1.53

Pressure Drop After Change

in Min Water Level 3.1 1.8 3.1 0.0

Fill rate/ Pumping rate 67 67 67 67 67

Draw rate/ consumer

demand 32 32 32 32 39

Avg fill time 0.09 0.54 0.19 0.37 0.10

Avg draw time 0.21 1.13 0.39 0.79 0.16

Avg volume added during fill 0.01 0.05 0.02 0.04 0.01

Avg Duration (fill +draw) 0.30 1.67 0.58 1.16 0.26

Ave Flow Rate 0.03 0.03 0.03 0.03 0.04

Ave Tank Vol 0.17 0.15 0.15 0.14 0.17

Turnover Time 5.5 4.7 4.7 4.4 4.7


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Step 3: Mixing Analysis

Instructions: Five scenarios are available for experimenting with reducing inlet diameter to improve mixing. Note that improvin

Enter data shown in red. Do not use this analysis if the mixing equations are not applicable (H/D>1)!

No Changes Scenario A Scenario B Scenario C Scenario DHigh/Max Level 28.60 28.60 26.00 26.00 28.60

Low/Min Level 27.07 20.00 23.00 20.00 27.07

Tank diameter 32 32 32 32 32

Inlet Diameter 1.00 1.00 0.40 0.80 1.00

H/D ratio 0.89 0.89 0.81 0.81 0.89


Draw rate/ consumer

demand 32 32 32 32 39

Actual Level Change 1.53 8.60 3.00 6.00 1.53

Desired Level Change

Needed for Good Mixing 8.73 7.13 3.13 5.70 8.73Mixing Performance Ratio

(Measured/Desired) 0.18 1.21 0.96 1.05 0.18

Avg fill time 0.09 0.54 0.19 0.37 0.10Avg draw time 0.21 1.13 0.40 0.79 0.16

Avg Flow Rate 0.03 0.03 0.03 0.03 0.04

Avg Tank Volume 0.17 0.15 0.15 0.14 0.17

Turnover Time 5.5 4.7 4.8 4.4 4.7


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Tank Name: Perry HillCylindrical (C), Rectangular


these (n)? h



level? n



H/D ratio: 0.47


Instructions: Enter tank fill data (obtained from plant SCADA) for up to 15 fill periods. Data inputted by the user are shown in redDate Time Date + Time Delta Time

Days

07/18/05 8:54 PM 20.30 7/18/05 20:54

07/19/05 5:15 AM 29.60 7/19/05 5:15 0.35

07/19/05 9:43 AM 26.40 7/19/05 9:43 0.53

07/19/05 4:43 PM 30.60 7/19/05 16:43 0.83

07/19/05 7:16 PM 24.00 7/19/05 19:16 0.93

07/20/05 12:22 AM 30.20 7/20/05 0:22 1.14

07/20/05 8:40 AM 21.90 7/20/05 8:40 1.49

07/20/05 2:38 PM 28.00 7/20/05 14:38 1.74

07/20/05 9:42 PM 17.50 7/20/05 21:42 2.03

07/21/05 5:02 AM 28.00 7/21/05 5:02 2.34

07/21/05 7:20 AM 22.10 7/21/05 7:20 2.43

07/21/05 5:38 PM 29.10 7/21/05 17:38 2.86

07/22/05 12:50 AM 18.60 7/22/05 0:50 3.16

07/22/05 5:02 AM 24.60 7/22/05 5:02 3.3407/22/05 7:28 AM 21.60 7/22/05 7:28 3.44

07/22/05 3:22 PM 26.30 7/22/05 15:22 3.77

07/22/05 11:33 PM 19.70 7/22/05 23:33 4.11

07/23/05 5:00 AM 29.10 7/23/05 5:00 4.34

07/23/05 10:14 AM 23.70 7/23/05 10:14 4.56

07/23/05 4:52 PM 27.30 7/23/05 16:52 4.8

07/23/05 8:09 PM 20.60 7/23/05 20:09 5.0

07/24/05 5:33 AM 27.40 7/24/05 5:33 5.4

07/24/05 9:11 PM 18.40 7/24/05 21:11 6.0

07/25/05 4:37 AM 27.80 7/25/05 4:37 6.3

07/25/05 7:09 AM 23.00 7/25/05 7:09 6.4

07/25/05 1:13 PM 28.70 7/25/05 13:13 6.7

07/25/05 9:20 PM 19.60 7/25/05 21:20 7.0

07/26/05 4:54 AM 26.00 7/26/05 4:54 7.3

07/26/05 7:30 AM 22.30 7/26/05 7:30 7.407/26/05 4:00 PM 25.20 7/26/05 16:00 7.8

Tank #2 Worksheet


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(ft) (ft) (MG) (MG) (MG)1 20.30 29.60 0.67 0.31

2 26.40 30.60 0.87 0.14 0.11

3 24.00 30.20 0.79 0.20 0.22

4 21.90 28.00 0.72 0.20 0.27

5 17.50 28.00 0.58 0.35 0.35

6 22.10 29.10 0.73 0.23 0.19

7 18.60 24.60 0.61 0.20 0.35

8 21.60 26.30 0.71 0.16 0.10

9 19.70 29.10 0.65 0.31 0.22

10 23.70 27.30 0.78 0.12 0.18

11 20.60 27.40 0.68 0.22 0.22

12 18.40 27.80 0.61 0.31 0.30

13 23.00 28.70 0.76 0.19 0.16

14 19.60 26.00 0.65 0.21 0.30

15 22.30 25.20 0.74 0.10 0.12

Turnover Summary











Turnover Time is at a desired level.

Desired Water Le

Good Mixing

Inlet Diameter N

Mixing Performa

(Measured/Desir


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Inlet Diameter 2.00 2.00 2.00 2.00 2.00

High/Max Level 27.86 27.86 27.86 27.86 27.86

Low/Min Level 21.31 21.31 21.31 21.31 21.31

Level Change 6.55 6.55 6.55 6.55 6.55




Draw rate/ consumer

demand 643 643 643 643 643

Avg fill time 0.30 0.30 0.30 0.30 0.30

Avg draw time 0.24 0.23 0.23 0.23 0.23



Ave Flow Rate 0.40 0.41 0.41 0.41 0.41

Ave Tank Vol 0.81 0.81 0.81 0.81 0.81

Turnover Time 2.0 2.0 2.0 2.0 2.0


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Modify data shown in red. Do not use this analysis if the mixing equations are not applicable (H/D>1)!


Low/Min Level 21.31 21.31 21.31 21.31 21.31


Inlet Diameter 2.00 1.50 1.50 1.50 1.50

H/D ratio 0.37 0.37 0.37 0.37 0.37


Draw rate/ consumer

demand 643 643 643 643 643



Needed for Good Mixing 8.45 6.32 6.32 6.32 6.32

Mixing Performance Ratio



Avg Flow Rate 0.40 0.41 0.41 0.41 0.41

Avg Tank Volume 0.81 0.81 0.81 0.81 0.81

Turnover Time 2.0 2.0 2.0 2.0 2.0


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Tank Name: GirardCylindrical (C), Rectangular


these (n)? c



level? n



H/D ratio: 0.29



Ft Ft Days

07/12/05 7:16 PM 15.00 7/12/05 19:16

07/13/05 4:51 PM 22.10 7/13/05 16:51 0.90

07/14/05 12:52 PM 20.50 7/14/05 12:52 1.73

07/15/05 5:10 AM 23.20 7/15/05 5:10 2.41

07/15/05 11:05 PM 14.90 7/15/05 23:05 3.16

07/16/05 9:07 AM 23.00 7/16/05 9:07 3.58

07/16/05 5:53 PM 16.20 7/16/05 17:53 3.94

07/17/05 4:37 PM 23.10 7/17/05 16:37 4.89

07/18/05 8:48 AM 14.90 7/18/05 8:48 5.56

07/19/05 12:53 AM 23.10 7/19/05 0:53 6.23

07/19/05 2:25 PM 17.70 7/19/05 14:25 6.80

07/20/05 1:47 AM 23.20 7/20/05 1:47 7.27

07/20/05 3:12 PM 16.70 7/20/05 15:12 7.83

07/21/05 2:35 AM 23.10 7/21/05 2:35 8.3007/21/05 2:21 PM 16.80 7/21/05 14:21 8.80

07/22/05 3:30 PM 23.20 7/22/05 15:30 9.84

07/23/05 3:27 PM 15.90 7/23/05 15:27 10.84

07/24/05 5:09 AM 23.10 7/24/05 5:09 11.41

07/24/05 7:05 PM 14.90 7/24/05 19:05 11.99

07/25/05 2:47 AM 23.10 7/25/05 2:47 12.3

07/25/05 3:02 PM 16.90 7/25/05 15:02 12.8

07/26/05 4:39 AM 23.10 7/26/05 4:39 13.4

07/24/05 9:11 PM 18.40 7/24/05 21:11 12.1

07/25/05 4:37 AM 27.80 7/25/05 4:37 12.4

07/25/05 7:09 AM 23.00 7/25/05 7:09 12.5

07/25/05 1:13 PM 28.70 7/25/05 13:13 12.7

07/25/05 9:20 PM 19.60 7/25/05 21:20 13.1

07/26/05 4:54 AM 26.00 7/26/05 4:54 13.4

07/26/05 7:30 AM 22.30 7/26/05 7:30 13.507/26/05 4:00 PM 25.20 7/26/05 16:00 13.9

Tank #3 Worksheet


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(ft) (ft) (MG) (MG) (MG)1 15.00 22.10 0.65 0.31

2 20.50 23.20 0.89 0.12 0.07

3 14.90 23.00 0.65 0.35 0.36

4 16.20 23.10 0.70 0.30 0.30

5 14.90 23.10 0.65 0.36 0.36

6 17.70 23.20 0.77 0.24 0.23

7 16.70 23.10 0.73 0.28 0.28

8 16.80 23.20 0.73 0.28 0.27

9 15.90 23.10 0.69 0.31 0.32

10 14.90 23.10 0.65 0.36 0.36

11 16.90 23.10 0.73 0.27 0.27

12 18.40 27.80 0.80 0.41 0.20

13 23.00 28.70 1.00 0.25 0.21

14 19.60 26.00 0.85 0.28 0.40

15 22.30 25.20 0.97 0.13 0.16

Turnover Summary












Desired Water Le

Good Mixing

Inlet Diameter N

Mixing Performa

(Measured/Desir


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Inlet Diameter 2.00 2.00 2.00 2.00 2.00

High/Max Level 24.07 24.07 24.07 24.07 24.07

Low/Min Level 17.58 17.58 17.58 17.58 17.58

Level Change 6.49 6.49 6.49 6.49 6.49




Draw rate/ consumer

demand 472 472 472 472 472

Avg fill time 0.55 0.55 0.55 0.55 0.55

Avg draw time 0.40 0.41 0.41 0.41 0.41



Ave Flow Rate 0.30 0.29 0.29 0.29 0.29

Ave Tank Vol 0.90 0.90 0.90 0.90 0.90

Turnover Time 3.1 3.1 3.1 3.1 3.1


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Low/Min Level 17.58 17.58 17.58 17.58 17.58


Inlet Diameter 2.00 2.00 2.00 2.00 2.00

H/D ratio 0.28 0.28 0.28 0.28 0.28


Draw rate/ consumer

demand 472 472 472 472 472



Needed for Good Mixing 6.80 6.77 6.77 6.77 6.77




Avg Flow Rate 0.30 0.29 0.29 0.29 0.29

Avg Tank Volume 0.90 0.90 0.90 0.90 0.90

Turnover Time 3.1 3.1 3.1 3.1 3.1


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Tank Name: Hyde ParkCylindrical (C), Rectangular


these (n)? r



level? n


Longest Sidewall Length, D: 30 ft

Shortest Sidewall Length, L: 20 ft

H/D ratio: 0.67



Ft Ft Days

04/07/05 8:12 AM 27.90 4/7/05 8:12

04/07/05 9:09 AM 28.50 4/7/05 9:09 0.04

04/07/05 1:54 PM 26.80 4/7/05 13:54 0.24

04/07/05 3:49 PM 28.60 4/7/05 15:49 0.32

04/07/05 7:50 PM 27.00 4/7/05 19:50 0.48

04/07/05 10:51 PM 28.70 4/7/05 22:51 0.61

04/08/05 6:30 AM 26.90 4/8/05 6:30 0.93

04/08/05 8:40 AM 28.60 4/8/05 8:40 1.02

04/08/05 2:44 PM 26.70 4/8/05 14:44 1.27

04/08/05 5:00 PM 28.60 4/8/05 17:00 1.37

04/08/05 8:50 PM 27.00 4/8/05 20:50 1.53

04/08/05 11:26 PM 28.60 4/8/05 23:26 1.63

04/09/05 8:11 AM 26.50 4/9/05 8:11 2.00

04/09/05 10:55 AM 28.60 4/9/05 10:55 2.1104/09/05 2:26 PM 26.90 4/9/05 14:26 2.26

04/09/05 5:17 PM 28.60 4/9/05 17:17 2.38

04/09/05 8:50 PM 27.00 4/9/05 20:50 2.53

04/09/05 10:51 PM 28.60 4/9/05 22:51 2.61

04/10/05 5:58 AM 26.90 4/10/05 5:58 2.91

04/10/05 8:41 AM 28.60 4/10/05 8:41 3.0

04/10/05 12:02 PM 27.00 4/10/05 12:02 3.2

04/10/05 2:14 PM 28.60 4/10/05 14:14 3.3

04/10/05 5:32 PM 26.90 4/10/05 17:32 3.4

04/10/05 8:35 PM 28.60 4/10/05 20:35 3.5

04/11/05 2:28 AM 27.00 4/11/05 2:28 3.8

04/11/05 4:10 AM 28.60 4/11/05 4:10 3.8

04/11/05 7:00 AM 28.00 4/11/05 7:00 3.9

04/11/05 8:41 AM 28.60 4/11/05 8:41 4.0

04/11/05 2:12 PM 26.50 4/11/05 14:12 4.304/11/05 4:32 PM 28.60 4/11/05 16:32 4.3

Tank #4 Worksheet


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(ft) (ft) (MG) (MG) (MG)1 27.90 28.50 0.13 0.00

2 26.80 28.60 0.12 0.01 0.01

3 27.00 28.70 0.12 0.01 0.01

4 26.90 28.60 0.12 0.01 0.01

5 26.70 28.60 0.12 0.01 0.01

6 27.00 28.60 0.12 0.01 0.01

7 26.50 28.60 0.12 0.01 0.01

8 26.90 28.60 0.12 0.01 0.01

9 27.00 28.60 0.12 0.01 0.01

10 26.90 28.60 0.12 0.01 0.01

11 27.00 28.60 0.12 0.01 0.01

12 26.90 28.60 0.12 0.01 0.01

13 27.00 28.60 0.12 0.01 0.01

14 28.00 28.60 0.13 0.00 0.00

15 26.50 28.60 0.12 0.01 0.01

Turnover Summary











Turnover time is at an undesirable level, use Turnover Time

Analysis (Step 2) to determine operational strategies that

will reduce turnover time.

Desired Water Le

Good Mixing

Inlet Diameter N

Mixing Performa

(Measured/Desir


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No Changes Scenario A Scenario B Scenario C Scenario DLongest Sidewall Length 30 30 30 30 30

Shortest Sidewall Length 20 20 20 20 20

Inlet Diameter 2.00 2.00 2.00 2.00 2.00

High/Max Level 28.60 28.60 28.00 26.00 28.00

Low/Min Level 27.00 27.00 27.00 21.50 27.00

Level Change 1.60 1.60 1.00 4.50 1.00



Fill rate/ Pumping rate 52 52 52 52 52Draw rate/ consumer

demand 25 25 25 25 30

Avg fill time 0.09 0.10 0.06 0.27 0.06

Avg draw time 0.21 0.20 0.13 0.56 0.10



Ave Flow Rate 0.02 0.02 0.02 0.02 0.03

Ave Tank Vol 0.12 0.12 0.12 0.11 0.12

Turnover Time 5.3 5.2 5.2 4.4 4.4


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Low/Min Level 27.00 27.00 27.00 21.50 27.00

Longest Sidewall Length 30 30 30 30 30

Shortest Sidewall Length 20 20 20 20 20

Inlet Diameter 2.00 0.50 0.50 0.50 0.50

H/D ratio 0.95 0.95 0.93 0.87 0.93


Draw rate/ consumer

demand 25 25 25 25 30

Actual Level Change 1.61 1.60 1.00 4.50 1.00Desired Level Change

Needed for Good Mixing 19.21 4.80 4.80 4.13 4.80Mixing Performance Ratio



Avg Flow Rate 0.02 0.02 0.02 0.02 0.03

Avg Tank Volume 0.12 0.12 0.12 0.11 0.12

Turnover Time 5.3 5.2 5.2 4.4 4.4


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Tank Name: Ryan RdCylindrical (C), Rectangular


these (n)? h



level? n



H/D ratio: 0.35



Days

07/13/05 8:23 AM 32.80 7/13/05 8:23

07/14/05 4:39 AM 38.10 7/14/05 4:39 0.84

07/14/05 9:20 PM 34.20 7/14/05 21:20 1.54

07/15/05 4:52 AM 37.20 7/15/05 4:52 1.85

07/15/05 1:26 PM 33.30 7/15/05 13:26 2.21

07/16/05 4:12 AM 37.20 7/16/05 4:12 2.83

07/17/05 11:19 AM 30.40 7/17/05 11:19 4.12

07/17/05 4:37 PM 34.60 7/17/05 16:37 4.34

07/17/05 10:46 PM 29.90 7/17/05 22:46 4.60

07/18/05 4:03 AM 34.70 7/18/05 4:03 4.82

07/18/05 12:57 PM 31.00 7/18/05 12:57 5.19

07/19/05 5:31 PM 41.60 7/19/05 17:31 6.38

07/20/05 10:35 AM 34.40 7/20/05 10:35 7.09

07/20/05 4:09 PM 37.90 7/20/05 16:09 7.3207/20/05 10:43 PM 32.90 7/20/05 22:43 7.60

07/21/05 5:44 AM 36.00 7/21/05 5:44 7.89

07/21/05 8:25 AM 34.10 7/21/05 8:25 8.00

07/21/05 6:39 PM 40.10 7/21/05 18:39 8.43

07/22/05 2:40 AM 30.30 7/22/05 2:40 8.76

07/22/05 6:21 PM 37.70 7/22/05 18:21 9.4

07/23/05 1:22 AM 32.90 7/23/05 1:22 9.7

07/23/05 6:50 AM 36.90 7/23/05 6:50 9.9

07/23/05 11:07 AM 34.60 7/23/05 11:07 10.1

07/23/05 5:19 PM 36.90 7/23/05 17:19 10.4

07/24/05 12:56 AM 32.90 7/24/05 0:56 10.7

07/24/05 7:35 AM 36.10 7/24/05 7:35 11.0

07/24/05 10:21 PM 30.30 7/24/05 22:21 11.6

07/25/05 4:47 AM 36.20 7/25/05 4:47 11.8

07/25/05 8:35 AM 33.50 7/25/05 8:35 12.007/25/05 5:42 PM 39.40 7/25/05 17:42 12.4

Tank #5 Worksheet


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Inlet Diameter 2.00 2.00 2.00 2.00 2.00

High/Max Level 37.37 37.37 35.00 35.00 35.00

Low/Min Level 32.50 28.00 32.50 28.00 32.50

Level Change 4.87 9.37 2.50 7.00 2.50


in Min Water Level 1.9 1.9


Draw rate/ consumer

demand 655 655 655 655 665

Avg fill time 0.43 0.82 0.22 0.61 0.22

Avg draw time 0.43 0.84 0.22 0.63 0.22



Ave Flow Rate 0.48 0.48 0.48 0.48 0.48

Ave Tank Vol 2.96 2.77 2.86 2.66 2.86

Turnover Time 6.1 5.8 5.9 5.6 5.9


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Tank Name: Mt LookoutCylindrical (C), Rectangular


these (n)? n



level? n

Tank spreadsheet is not set up for tank shapes other than cylindrical, hydropillar, and r

Inlet diameter, d: ft


Days

07/12/05 7:16 PM 15.00 7/12/05 19:16

07/13/05 4:51 PM 22.10 7/13/05 16:51 0.90

07/14/05 12:52 PM 20.50 7/14/05 12:52 1.73

07/15/05 5:10 AM 23.20 7/15/05 5:10 2.41

07/15/05 11:05 PM 14.90 7/15/05 23:05 3.16

07/16/05 9:07 AM 23.00 7/16/05 9:07 3.58

07/16/05 5:53 PM 16.20 7/16/05 17:53 3.94

07/17/05 4:37 PM 23.10 7/17/05 16:37 4.89

07/18/05 8:48 AM 14.90 7/18/05 8:48 5.56

07/19/05 12:53 AM 23.10 7/19/05 0:53 6.23

07/19/05 2:25 PM 17.70 7/19/05 14:25 6.80

07/20/05 1:47 AM 23.20 7/20/05 1:47 7.27

07/20/05 3:12 PM 16.70 7/20/05 15:12 7.83

07/21/05 2:35 AM 23.10 7/21/05 2:35 8.3007/21/05 2:21 PM 16.80 7/21/05 14:21 8.80

07/22/05 3:30 PM 23.20 7/22/05 15:30 9.84

07/23/05 3:27 PM 15.90 7/23/05 15:27 10.84

07/24/05 5:09 AM 23.10 7/24/05 5:09 11.41

07/24/05 7:05 PM 14.90 7/24/05 19:05 11.99

07/25/05 2:47 AM 23.10 7/25/05 2:47 12.3

07/25/05 3:02 PM 16.90 7/25/05 15:02 12.8

07/26/05 4:39 AM 23.10 7/26/05 4:39 13.4

07/24/05 9:11 PM 18.40 7/24/05 21:11 12.1

07/25/05 4:37 AM 27.80 7/25/05 4:37 12.4

07/25/05 7:09 AM 23.00 7/25/05 7:09 12.5

07/25/05 1:13 PM 28.70 7/25/05 13:13 12.7

07/25/05 9:20 PM 19.60 7/25/05 21:20 13.1

07/26/05 4:54 AM 26.00 7/26/05 4:54 13.4

07/26/05 7:30 AM 22.30 7/26/05 7:30 13.507/26/05 4:00 PM 25.20 7/26/05 16:00 13.9

Tank #6 Worksheet


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Fill period Vol at start Vol added Volume drawn


(MG) (MG) (MG)1 15.00 22.10 error error

2 20.50 23.20 error error








10 14.90 23.10 error error

11 16.90 23.10 error error

12 18.40 27.80 error error

13 23.00 28.70 error error

14 19.60 26.00 error error

15 22.30 25.20 error error

Turnover Summary

Avg Vol Added in One Fill Period #DIV/0! MG

Avg Vol Drawn in One Drain Period #DIV/0! MG Avg Actual VEF


Avg Draw Time 0.40 days

Avg Fill Rate #DIV/0! gpm

Avg Draw Rate #DIV/0! gpm


Avg Flow Rate into tank #DIV/0! MGD

Avg Tank Vol #DIV/0! MG

Turnover Time #DIV/0! days

#DIV/0!

Inlet Diameter N

Mixing Performa

(Measured/Desir


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No Changes Scenario A Scenario B Scenario C Scenario D

Inlet Diameter

FALSE 24.07 24.07 24.07 24.07

FALSE 17.58 17.58 17.58 17.58

6.49 6.49 6.49 6.49

Fill rate/ Pumping rate #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0!Draw rate/ consumer

demand #DIV/0! #DIV/0! #DIV/0! #DIV/0! 472

Avg fill time 0.55 #VALUE! #VALUE! #VALUE! #VALUE!

Avg draw time 0.40 #VALUE! #VALUE! #VALUE! #VALUE!

Avg volume added during fill #DIV/0!

Avg Duration (fill +draw) 0.95 #VALUE! #VALUE! #VALUE! #VALUE!

Ave Flow Rate #DIV/0! #VALUE! #VALUE! #VALUE! #VALUE!

Ave Tank Vol #DIV/0!

Turnover Time #DIV/0! #VALUE! #VALUE! #VALUE! #VALUE!


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Instructions: Five scenarios are available for experimenting with reducing inlet diameter to improve mixing. Note that improving


No Changes Scenario A Scenario B Scenario C Scenario DFALSE 24.07 24.07 24.07 24.07

FALSE 17.58 17.58 17.58 17.58

Inlet Diameter 0.75 0.50 0.17 1.00

Fill rate/ Pumping rate #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0!

Draw rate/ consumer

demand #DIV/0! #DIV/0! #DIV/0! #DIV/0! 472


(Measured/Desired) #VALUE! #VALUE! #VALUE! #VALUE!

Avg fill time 0.55 #VALUE! #VALUE! #VALUE! #VALUE!

Avg draw time 0.40 #VALUE! #VALUE! #VALUE! #VALUE!Avg Flow Rate #DIV/0!

Avg Tank Volume #DIV/0!

Turnover Time #DIV/0! #VALUE! #VALUE! #VALUE! #VALUE!


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Tank Name: NorthportCylindrical (C), Rectangular


these (n)? n



level? y


Instructions: Enter tank fill data (obtained from plant SCADA) for up to 15 fill periods. Data inputted by the user are shown in redDate Time Vol at Start of Fill Vol at End of Fill Date + Time Delta Time

Gal Gal Days

01/01/05 3:48 AM 480400.00 1/1/05 3:48

01/01/05 9:49 AM 368600.00 1/1/05 9:49 0.25

01/01/05 4:04 PM 407850.00 1/1/05 16:04 0.51

01/01/05 7:48 PM 349000.00 1/1/05 19:48 0.67

01/02/05 12:16 AM 480400.00 1/2/05 0:16 0.85

01/02/05 7:32 AM 370600.00 1/2/05 7:32 1.16

01/02/05 10:41 AM 411750.00 1/2/05 10:41 1.29

01/02/05 6:06 PM 360800.00 1/2/05 18:06 1.60

01/03/05 2:29 AM 476450.00 1/3/05 2:29 1.94

01/03/05 8:21 AM 335319.20 1/3/05 8:21 2.19

01/03/05 8:19 PM 476450.00 1/3/05 20:19 2.69

01/04/05 4:00 AM 351000.00 1/4/05 4:00 3.01

01/04/05 7:25 AM 454900.00 1/4/05 7:25 3.15

01/04/05 3:01 PM 358850.00 1/4/05 15:01 3.4701/04/05 9:07 PM 476450.00 1/4/05 21:07 3.72

01/04/05 10:58 PM 378450.00 1/4/05 22:58 3.80

01/05/05 2:03 AM 425500.00 1/5/05 2:03 3.93

01/05/05 4:31 AM 347050.00 1/5/05 4:31 4.03

01/05/05 9:02 AM 478450.00 1/5/05 9:02 4.22

01/05/05 12:51 PM 349000.00 1/5/05 12:51 4.4

01/05/05 5:21 PM 478450.00 1/5/05 17:21 4.6

01/05/05 8:52 PM 347050.00 1/5/05 20:52 4.7

Tank #7 Worksheet


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Fill period Vol at Start of Fill Vol at End of Fill Vol at start Vol added Volume drawn


(gal) (gal) (MG) (MG) (MG)1 368600.00 480400.00 0.37 0.11

2 349000.00 407850.00 0.35 0.06 0.13

3 370600.00 480400.00 0.37 0.11 0.04

4 360800.00 411750.00 0.36 0.05 0.12

5 335319.20 476450.00 0.34 0.14 0.08

6 351000.00 476450.00 0.35 0.13 0.13

7 358850.00 454900.00 0.36 0.10 0.12

8 378450.00 476450.00 0.38 0.10 0.08

9 347050.00 425500.00 0.35 0.08 0.13

10 349000.00 478450.00 0.35 0.13 0.08

11 347050.00 478450.00 0.35 0.13 0.13

12

13

14

15

Turnover Summary

Avg Vol Added in One Fill Period 0.10 MG Avg Vol at Start



Avg Draw Time 0.23 days Avg Measured V








Desired Vol Cha

Mixing

Inlet Diameter N

Mixing Performa

(Measured/Desir


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Inlet Diameter 1.00 1.00 1.00 1.00 1.00

Fraction Full (Max Level) 0.92 0.92 0.92 0.92 0.92

Fraction Full (Min Level) 0.71 0.71 0.71 0.71 0.71

Fraction Volume Change 0.21 0.21 0.21 0.21 0.21


demand 305 305 305 305 305

Avg fill time 0.22 0.22 0.22 0.22 0.22

Avg draw time 0.23 0.24 0.24 0.24 0.24



Ave Flow Rate 0.23 0.23 0.23 0.23 0.23

Ave Tank Vol 0.41 0.41 0.41 0.41 0.41

Turnover Time 1.8 1.8 1.8 1.8 1.8


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No Changes Scenario A Scenario B Scenario C Scenario DFraction Full (Max Level) 0.92 0.92 0.92 0.92 0.92


Inlet Diameter 1.00 1.00 1.00 1.00 1.00


Draw rate/ consumer

demand 305 305 305 305 305

Actual Vol Change 103229.80 105000.00 105000.00 105000.00 105000.00

Desired Vol Change Needed

for Good Mixing 88430.14 88248.09 88248.09 88248.09 88248.09




Avg Flow Rate 0.23 0.23 0.23 0.23 0.23

Avg Tank Volume 0.41 0.41 0.41 0.41 0.41

Turnover Time 1.8 1.8 1.8 1.8 1.8


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Fill period Vol at Start of Fill Vol at End of Fill Vol at start Vol added Volume drawn


(gal) (gal) (MG) (MG) (MG)1 2580200.00 3362800.00 2.58 0.78

2 2443000.00 2854950.00 2.44 0.41 0.92

3 2594200.00 3362800.00 2.59 0.77 0.26

4 2525600.00 2882250.00 2.53 0.36 0.84

5 2347233.00 3335150.00 2.35 0.99 0.54

6 2457000.00 3335150.00 2.46 0.88 0.88

7 2511950.00 3184300.00 2.51 0.67 0.82

8 2649150.00 3335150.00 2.65 0.69 0.54

9 2429350.00 2978500.00 2.43 0.55 0.91

10 2443000.00 3349150.00 2.44 0.91 0.54

11 2429350.00 3349150.00 2.43 0.92 0.92

12

13

14

15

Turnover Summary

Avg Vol Added in One Fill Period 0.72 MG Avg Vol at Start



Avg Draw Time 0.23 days Avg Measured V








Desired Vol Cha

Mixing

Inlet Diameter N

Mixing Performa

(Measured/Desir


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Inlet Diameter 1.00 1.00 1.00 1.00 1.00

Fraction Full (Max Level) 0.80 0.80 0.80 0.80 0.80


Fraction Volume Change 0.18 0.18 0.18 0.18 0.18


demand 2133 2133 2133 2133 2133

Avg fill time 0.22 0.22 0.22 0.22 0.22

Avg draw time 0.23 0.23 0.23 0.23 0.23



Ave Flow Rate 1.60 1.60 1.60 1.60 1.60

Ave Tank Vol 2.85 2.84 2.84 2.84 2.84

Turnover Time 1.8 1.8 1.8 1.8 1.8


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No Changes Scenario A Scenario B Scenario C Scenario DFraction Full (Max Level) 0.80 0.80 0.80 0.80 0.80


Inlet Diameter 1.00 1.00 1.00 1.00 1.00


Draw rate/ consumer

demand 2133 2133 2133 2133 2133

Actual Vol Change 722608.73 720000.00 720000.00 720000.00 720000.00

Desired Vol Change Needed

for Good Mixing 323592.89 322493.43 322493.43 322493.43 322493.43




Avg Flow Rate 1.60 1.60 1.60 1.60 1.60

Avg Tank Volume 2.85 2.84 2.84 2.84 2.84

Turnover Time 1.8 1.8 1.8 1.8 1.8


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Tank Shape:

Tank Dimensions:

Cylindrical or Hydropillar Tanks Rectangula

Cylindrical Hydropillar

Tank G

CylindricalCylindrical

HydropillarHydropillar

RectangularRectangular

Water

Inlet diameter (d)

Tank Diameter (D)

MaximumOperating

WaterDepth(H)

Water

Inlet diameter (d)

Dry riser

Wet riser

Tank Diameter (D)

MaximumOperating

WaterDepth(H)

Inlet


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Download - Tank Spreadsheet

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