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Water Balance Study. Water Treatment, Management and Conservation Solutions. Project Overview. Two Primary Objectives Balance the Internal Water Usage w ith Purchased and Discharge Water Volumes. Look for Opportunities To Reduce Water Usage and Conserve Utilities. Methodology. - PowerPoint PPT Presentation
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Water Balance Study
Water Treatment, Management and Conservation Solutions
Project Overview
Two Primary Objectives
1. Balance the Internal Water Usage with Purchased and Discharge Water Volumes.
2. Look for Opportunities To Reduce Water Usage and Conserve Utilities
Methodology1. Introduction and Site Survey
2. Compile Existing Information; Meter Readings, Site Drawings, Usage Estimates, Etc.
3. Generate List of Water Users by Department
4. Gather Purchased Water Usage Data
5. Preliminary Balance, Data Verification and Revisions
6. Final Water Balance
7. Provide Recommendations For Water and Energy Conservation.
Resources
Significant Information and Data are required to execute study Introduction, Site Overview, Site Specific Details
Purchased & Discharge Water Data
Resources
Departmental InterviewsHDM – LDD – HVAC – Sytech –Wastewater Treatment –LDD Tech Center – Emissions Solutions –
Resources
Drawings; RB-28 – Water Meters & Mains RB-28 (TIFFY) – Combined Sewer RB-30 – Plant 1 Storm Sewers RB-31 – Sewers Surrounding Facility RB-65 – Parking Plan with Gate #’s
Water Supply & Discharge
An Overview Of Water Sources and Discharge Points.
Water Sources
There are nine (9) water meters being monitored by the city. They are designated as follows:Meter # Size Location Description
Meter #1 6” Incoming City Water
Meter #2 3” DEDUCT - Tower Makeup Water
Meter #3 6”ADD BACK - Tower Blowdown & Filter Backwash
Meter #4 4”ADD BACK - Tower Blowdown & Filter Backwash
Meter #5 10” Incoming City Water
Meter #6 4” Incoming City Water
Meter #7 3” Incoming City Water - Irrigation
Meter #8 2” Incoming City Water - Irrigation
Meter #9 2” Incoming City Water - Irrigation
Discharge Locations
There are seven (8) discharge points. They are designated as follows:
Description Destination Metered Area
Point A Sanitary Sewer No Bldg. 60 Basement
Point B Sanitary Sewer Yes Bldg. 60 Basement
Point C Sanitary Sewer Yes By Building 40
Point I Sanitary Sewer No Building 73
Point G Sanitary Sewer No Building 30
Unnamed 1 Sanitary Sewer No Restrooms in Bldg. 96
Unnamed 2 Sanitary Sewer Yes Tower Blowdown
Point WWT Sanitary Sewer Yes WWT Plant (Pt. B)
Water Usage History
The following graph depicts the increasing volumes of incoming water and discharge water since 2005
Water & Sewer Cost Calculator
CITY WATER & SEWER COST CALCULATOREnter City Water Volume 92,992,000 Gallons
Enter City Sewer Volume 80,552,000 Gallons
City Water Volume (Gallons)City Water Rate (per
1,000 Gallons)City Sewer Rate (per
1,000 gallons) City Water Charge City Sewer ChargeUp to 10,000 $1.61 $6.67 $16.10 $66.70
10,000 to 50,000 $1.34 $5.97 $53.60 $238.8050,000 to 300,000 $1.11 $4.77 $277.50 $1,192.50
300,000 to 1,000,000 $1.03 $3.63 $721.00 $2,541.00
Over 1,000,000 $0.88 $2.81 $80,952.96 $258,497.52
TOTAL $82,021.16 $262,536.52
Date City Water Cost City Sewer Cost TOTAL2005 $20,771.40 $66,954.90 $87,726.30
2006 $37,555.64 $120,550.03 $158,105.672007 $51,798.44 $166,029.88 $217,828.322008 $84,906.68 $271,750.51 $356,657.192009 $82,021.16 $262,536.52 $344,557.68
5-Year Total $277,053 $887,822 $1,164,875
Water & Sewer Cost History
Water Usage Estimate
1. Interviewed Department Heads
2. Traced Water and Discharge Piping Lines.
3. Recorded and Verified Existing Meter Readings
4. Reviewed Historical Meter Readings.
5. Monitored and Verified Flow Rates with Portable Ultrasonic Flow Meter.
HDM Usage Worksheet
Water User Qty System Volume (gals)
Frequency of Operation
Type of Water Meter #
Water Usage per UnitANNUAL
TOTALGallons per Operation
Gallons per Day
Gallons per Week
Gallons per Month
Gallons per Year
Central Cooling - Head line 1 70,000 Ongoing RO/City 1&5 - 2,500 17,500 76,050 910,000 910,000
Central Cooling - Block line 1 70,000 Ongoing RO/City 1&5 - 2,500 17,500 76,050 910,000 910,000
Parts Washer - Makeup 4 - Ongoing RO/City 1&5 - 25 175 761 9,100 36,400
Parts Washer - Washdown & Refill 4 3,000 4 Weeks City 1&5 4,000 142 1,000 4,333 52,000 208,000
Mobile Parts Washer - Makeup 4 - Ongoing RO/City 1&5 - 10 70 304 3,650 14,600
Mobile Washer - Washdown & Refill 4 300 2 Weeks City 1&5 400 29 201 869 10,428 41,712
Mazaks 7 211 6 Weeks City 1&5 0 0 0 0 0 0
Mist Eliminators: Mist Cycle 9 n/a 10 minutes every shift Soft 1&5 100 300 2,100 9,100 109,200 982,800
Mist Eliminators: Pre-Filter Washdown 9 n/a 10 minutes every shift Soft 1&5 50 150 1,050 4,550 54,600 491,400
Aqueous Parts Washer 1 150 Monthly City 1&5 200 7 46 200 2,400 2,400
Mop Basins and Utility Sinks 6 n/a Ongoing City 1&5 - 5 35 152 1,825 10,950
Solution SP-2238R / J-2347 1 500 6 Weeks City 1&5 600 14 100 435 5,214 5,214
Nalco Solution SCN9194CL 1 150 6 Weeks City 1&5 200 5 33 145 1,738 1,738
TOTAL 3,615,214
Note: Red text indicates variable used for calculating usage Annual Gals
HDM Usage Chart
LDD Usage Chart
HVAC Usage Chart
Wastewater Usage Chart
LDTC Usage Chart
Employee & Related Usage Chart
Departmental Usage Summary
2009 Departmental Usage Chart
DEPARTMENT Type of Water Meter # ANNUAL TOTAL
HDM City/Soft/RO 1&5 3,615,214
LDD City/Soft/RO 1&5 818,695
HVAC City/Soft/RO 1&5 80,963,548
WWT City Water 1&5 8,840
LDTC City/Soft 1&5 53,067
SYTECH City 1&5 28,522
EMPLOYEES City/Soft 1&5 5,000,000
90,487,886Annual Gallons
Where Is The Water Coming From?
METER #2009 VOLUME
(Gallons)
Meter 1 34,220,000
Meter 3 2,270,000
Meter 4 230,000
Meter 5 10,860,000
Meter 6 43,610,000
Meter 7 1,280,000
Meter 8 522,000
Meter 9 0
TOTAL 92,992,000
Where Is The Water Going?
2009 Water Balance
2009 PURCHASED v. USAGE BALANCE
ITEM QTY. Units
2009 Purchase Volume 92,992,000 gallons
2009 Projected Usage 90,487,886 gallons
Max. Margin of Error (+/-) 2%
Max. Discrepancy 1,859,840 gallons
Discrepancy -2,504,114 gallons
% Discrepancy 2.69%
2009 Balance Summary v. Purchased
Item Qty. Disc
Purchased 92,992,000 -
Estimated Usage 90,487,886 2.7%
Discharged 93,760,898 0.8%
Maintaining Water Balance-
There Is Significant Value In Ongoing Monitoring of Purchased Water Volume, Internal Usage and Discharge Water Volume.
Meter Data Can Be Integrated Into The Building Management System
A Comprehensive Plan For Meter Locations, Data Acquisition and Analysis Can Be Implemented by Danco/GWS.
Potential Water Conservation and Cost Reduction Projects
# DescriptionAnnual
Reduction Annual Savings
1 Reclaim Cooling Water from Blowdown HX in Boiler Room 655,200 $2,417.69
2 Reclaim Portion of RO Reject Water (50%) 6,480,000 $23,911.20
3Reclaim Cooling Water from Air Compressors in Bldg.12 & Bldg. 73
30,000,000 $110,700.00
4Reclaim Water from Mist Eliminators in HDM (Return to Cooling System)
1,000,000 $3,690.00
5 Reclaim Fire Main Test Water 500,000 $1,845.00
6 Adjust RO Flow Rates to 75% Conversion 876,000 $3,232.44
7 Use RO Water in Combination w/ City Water for Tower Makeup 3,000,000 $10,930.00
8 Use RO Makeup Water to Boilers 6,000,000 $78,117.60
9 Install VFD on RO Pump 68,841 $4,130.43
10 Install VFD on RO Water Distribution Pumps 28,684 $1,721.01
TOTAL $240,695.38
Operational Improvements -
Resolve issues with RO Pretreatment – Softeners and Carbon Filters
Improve RO System Operation
Segregate Soft Water System from RO
Reclaim Regeneration Water From Water Softener and Carbon Filters
More Operational Improvements
Additional RO Water Available for HDM
Heat RO Feedwater
Add Controls to Cooling Water Processes (Air Compressors)
Modify Water Main Configuration to Improve Flow & Pressure.
Questions and Answers