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Project Updates for collection: 2015 iCAP Objectives
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- Associated Project(s):Attached Files:
iWG meeting minutes March 28, 2017
Associated Project(s):see file
Attached Files:Water Use and Cycles of Concentration (COC) in a cooling tower
Associated Project(s):Below is information provided by Jeremy Overmann, B.S. Ch. E., Water Treatment Specialist, on the water use and cycles of concentration (COC) in a cooling tower, as requested after a Land and Water SWAT meeting.
"
Water SWAT members,
Here is some more information regarding the cooling tower discussion at today’s meeting.
This first graph shows how much water a typical 100 ton Cooling Tower uses per hour, and how this changes when the tower is operated at various Cycles of Concentration (COC)
NOTE: a 1 ton cooling tower can remove 15,000 BTU/hr of heat.
Most standard chemically treated Cooling Towers use unsoftened water and operate between 4 – 6 COC, depending on the source water quality (also called Make-Up water) and the efficacy of the chemical treatment program.
As COC increases, the potential for formation of calcium scale (and possibly other types of scale) increases. Scale deposits reduce the energy efficiency of the chiller and the cooling tower, and result in the need for labor intensive cleaning to remove the scale.
The following table shows the relationship between volume of Cooling Tower blowdown (bleed), blowdown rate (% bleed), COC, and total water usage.
Cycles of Concentration is controlled by choosing the rate of blowdown. This is done by controlling the blowdown (bleed) valve at the bottom of the tower.
COC
BLOWDOWN
TOTAL USAGE (Makeup)
Gallons
Percent
Gallons
Percent
1.5
10,000
100%
15,000
100%
2
5000
50%
10,000
66%
3
2500
25%
7500
50%
4
1667
17%
6667
44%
5
1250
13%
6250
42%
6
1000
10%
6000
40%
7
833
8%
5833
39%
8
714
7%
5714
38%
Note: Evaporation = 5000 Gallons
In a “Zero” blowdown cooling tower, softened water is used, and cycles of concentration ranges from 20 – 100 or higher. To achieve proper water chemistry to provide corrosion protection, usually need to operate at > 20 COC.
During the Champaign Regional Office Building study, the highest COC achieved was 51. The blowdown valve is turned off, however some water is lost from leaks in the tower, and from droplets of water that escape with the air that is drawn through the tower.
COC
BLOWDOWN
TOTAL USAGE (Makeup)
Gallons
Percent
Gallons
Percent
1.5
10,000
100%
15,000
100%
5
1250
13%
6250
42%
10
555
6%
5550
37%
25
208
2%
5208
35%
50
102
1%
5102
34%
75
66
0.7%
5066
34%
100
51
0.5%
5051
34%
200
25
0.3%
5025
34%
Note: Evaporation = 5000 Gallons
"
Stormwater Utility Fee overview
Associated Project(s):The University pays a stormwater utility fee to both the City of Urbana and the City of Champaign. The fee is based on total impervious area that drains into city-owned storm sewers. If stormwater drains into university-owned sewers then directly discharges to a receiving stream, there is no fee assessed.
- The current rate for the City of Champaign is $5.24/3,478 sq ft.
- The current rate for the City of Urbana is $5.14/3,100 sq ft.
There are credits and incentives that the university can apply toward the stormwater utility fee. By maintaining compliance with the university’s Municipal Separate Storm Sewer System (MS4) National Pollutant Discharge Elimination Systems (NPDES), the university receives a 5% credit from each city. Additionally, each city has their own Credit and Incentive Manual (attached) which provides an opportunity for the university to reduce their stormwater utility fee by reducing the impact of the runoff from their properties by methods such as installing sustainable storm water practices that allow stormwater to infiltrate into the ground. The manuals have specific guidelines on how to calculate the credits based on the particular stormwater practices that are employed.
Water & Stormwater SWAT Meeting Minutes 3/16/2017
Associated Project(s):Updates on BIF Greywater Meter application. Discussion on Cooling Tower COC and "Zero" blowdown systems.
Attached Files:PWR SWATeam Minutes 3/15
Associated Project(s):At the PWR SWAT Team meeting on March 15th, the team debated over the message in the new Ethics Compliance Message concerning recycling standards and rules. The team decided that two videos should be created, one with base instructions for recycling, the other for explaining the commonly misunderstood paper policy. The team will look more into the paper policy draft and suggest a new paper policy for the campus.
Attached Files:Sustainability interns continue work updating iCAP Portal project pages
Associated Project(s):CEE students Chenxi Jiang and Shuang Chen are working with Morgan Johnston to edit the iCAP Portal project pages for each iCAP objective. Chapters 8-12 do not have SWATeams, and the background research on these chapters has been completed. The edited project pages are scheduled to be online by the end of March. The next step is editing the iCAP objectives for each SWATeam chapter in the iCAP. Chenxi and Shaung will be meeting with SWATeam representatives over the next few weeks to gather information, and then the project pages will be edited to reflect the latest info. We expect to be able to complete this before Earth Day on April 22, 2017.
Plans for wrapping up student project
Associated Project(s):Diliya Murtazina and Morgan Johnston reviewed the work tasks completed this year, and identified files to finalize for the end of this project. Diliya will formalize the behavior change strategies document, collect all the example images, and provide documentation on the creation of the building level energy charts with examples.
South Campus Afforestation Recommendation - Assessment with comments
Associated Project(s):The iCAP Working Group (iWG) met on Feb 16, 2017. They supported the South Campus Afforestation recommendation. Their official comments for this recommendation was:
"The iCAP includes an objective to add 50 acres of trees on campus, and this SWATeam recommendation suggests one potential location. The iWG suggests the College of ACES work with the Campus Master Planning committee to identify appropriate locations for additional trees. Another option to consider is parallel to the Embarras River."
See attached the iWG assessment complete with comments from all the iWG members.
Attached Files:Provost Office approves funding for LED Exit Signs
Associated Project(s):The Office of the Provost approved $75,000 in one-time funding for the next step in the LED Exit Sign retrofit project. The funding of $75,000 is for LED Exit Sign lighting replacement, additions, and new building surveys. Material and labor of $70,000 would be used to replace 343 fixtures in 20 buildings at an average rate of $204/fixture. An additional $5,000 is proposed to survey 50 campus buildings for exit light counts. That will provide the input necessary for the next phase, once this phase is completed.
EGEN SWATeam Meeting (3.10.17)
Associated Project(s):The EGEN SWATeam held another bi-weekly meeting. Topics covered include:
- Associate Director for Campus Sustainability Ximing Cai and his vision for iSEE
- Biomass boiler at Energy Farm
- Opportunities for Geothermal on campus
Attached Files:iWG Meeting Notes from Jan. 27, 2017
Associated Project(s):The iCAP Working Group met and discussed the following agenda items. Meeting notes are attached.
1. Brief iCAP Portal overview by Morgan
2. Discuss any updates to Water002, Cooling Tower Increase COC
3. Discuss Trans008, Bike Parking in Ramps
4. Discuss updates to Econs004, Green Labs Coordinator
5. Consider issues with recommendation process and view recommendation trackerAttached Files:EGen006 Petascale Offsets recommendation - Assessment with all comments
Associated Project(s):The iCAP Working Group (iWG) met on February 23rd, 2017, to discuss and start the assessment on the SWATeam recommendation EGen006 Petascale Offsets. The iWG's official recommendation was:
"This has been an open issue since the 2010 iCAP and the 2015 iCAP. This should be addressed with the current discussions about supercomputing on campus."
See attached the iWG assessment complete with official comments from all the iWG members.
Attached Files:Water & Stormwater SWAT Meeting Minutes 2/23/2017
Associated Project(s):Updates on BIF Greywater Meter, Increase Cooling Tower COC, and Design Center Greywater Piping recommendations. Discussion on the development of water use dashboard.
Attached Files:iWG meeting agenda February 23, 2017
Associated Project(s):see file
Attached Files:iWG meeting minutes February 23, 2017
Associated Project(s):see file
Attached Files:EGEN SWATeam Meeting (2.17.17)
Associated Project(s):The EGEN SWATeam held another bi-weekly meeting. Topics covered include:
- Updating the EGEN objectives project page
- Reporting steam generation on-campus
- Plans for this semester
Attached Files:Carbon Credit funding approved for Virtual Storeroom
Associated Project(s):The estimated cost of $2-3/Carbon Credit has been approved by Director of iSEE Evan DeLucia and Interim Executive Director of F&S Helen Coleman for buying 10,000 additional carbon offsets, when purchasing the 103,000 replacement offsets from the carbon credits sold from 2015. The additional carbon offsets will be used as the initial inventory for a new Virtual Storeroom for carbon offsets being developed by iSEE for on campus users.
An email of approval is attached below.
Attached Files:Inaugural Stormwater Public Meeting
Associated Project(s):Keith Erickson, Morgan Johnston, Jason Jones, and Stephanie Cash attended the first annual Urbana Stormwater Public Meeting on February 15th, 2017. The City of Urbana Engineering Staff led a discussion with community members on the stormwater management practices required for the City’s National Pollutant Discharge Elimination System (NPDES) permit. The City of Urbana owns and operates a Municipal Separate Storm Sewer System (MS4) which is required by the US Environmental Protection Agency to implement minimum control measures to target and improve stormwater quality. The minimum control measures include public outreach and education, public participation and involvement, illicit discharge detection and elimination, construction site runoff control, post-construction runoff control, and pollution prevention and good housekeeping.
For more information: http://www.urbanaillinois.us/departments/public-works/StormwaterManagement
RFP update for buying offsets
Associated Project(s):The State Purchasing Officer recommends a single quantity for the Request for Proposals for buying Carbon Offsets. F&S and iSEE are considering the use of Carbon Credit (CCs) sales funding for the start-up inventory of 10,000 CCs for the Virtual Storeroom for Offsets.