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  2. Water Use and Cycles of Concentration (COC) in a cooling tower

    Associated Project(s): 
    Reduce Cooling Tower and Chiller Plant Water Use
    Land and Water iCAP Team

    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.

     

    2Q==

     

    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

     

    "

     

  3. Pricing Breaks for higher quantities

    Associated Project(s): 
    Solar Urbana-Champaign

    Hi Solar UC Advisory Committee,

    The Midwest Renewable Energy Association (MREA) has accepted the Solar Urbana-Champaign Advisory Committee’s recommendation and contracted with New Prairie Construction to install solar arrays for the second round of our group buy program.  MREA and New Prairie Construction have agreed to an amended fee schedule whereby New Prairie will be providing a rebate which will be paid to program participants who sign a contract for services by August 31, 2017 according to the following schedule: $.03/watt if the program reaches 50-150 kW of total capacity; $.06/watt for 150-250 kW; $.09/watt for installed capacity in excess of 250 kW. 

    Please keep an eye on solarurbanachampaign.com as we will be announcing Solar Power Hours very soon.  Please share these event announcements through your networks and let us know of any ideas for additional public engagement.

    Thanks!

    Scott

     

    Scott R. Tess

    Environmental Sustainability Manager

    City of Urbana, IL

    P: 217-384-2381   -   F: 217-819-3167

    706 S. Glover Ave. Urbana, IL 61802

    Walk Score® – 61 out of 100

    Bike Routes – www.urbanaillinois.us/bike-urbana

    Plan Your Bus Trip – http://www.cumtd.com or 384-8188

  4. Rates of participation in Eco-Olympics by residence hall

    Associated Project(s): 
    Eco-Olympics

    Hello Eco-Olympic followers!

    It's not too late to sign up! For those who have their team up and running, I highly encourage you all to meet before spring break begins. Once we get back, the competition is on! If you let me know the time and place, I can bring shirts to hand out.

    Here is the count of participants signed up for each hall:

    Remember that each person signed up gives your one point towards the participation price! Have some tabling events to get people interested!

    Best,

    Jessica Mondello
    Eco-Olympics | Director

    Think Globally. Act Locally.

     

  6. Weekly Update

    Associated Project(s): 
    Campus Bike Center
    Departmental Bike Sharing

    All, Happy Monday! Last week was a steady busy one. We routinely had peaks of busyness and fallow valleys. We had 97 visitors through the doors, including staff. We grossed $951.50. We sold two bikes for $335; one build-a-bike for $61; and 4 memberships for $120.

    Overall, last week I was met with a little more enthusiasm for the space than I regularly receive upon explaining the cost structure and mission of the CBC to new visitors. That was nice. Our for-sale bike count after last week sits at 14 for-sale bikes. I keep trying to grow that number up into the 20s but people keep buying them. That’s not a bad thing, I suppose.

    Additionally, the two Departmental Share bikes need parts that are on-order so that project will be delayed, unfortunately.

    Our numbers for B-a-Bs last year was quite low and as such I will begin photographing—with permission—all those who complete build-a-bikes and posting them on social media, which will serve two important functions: advertising for CBC and its most education-intensive program; and having a picture of owner and bicycle in the event of a stolen or lost bike.

    This week I am going to cull a few more unbuiildable bikes from the pile and concentrate heavily on ramping up the for-sale numbers since this week of cold, snowy weather should keep the shoppers at bay. I will additionally focus on drop-bar bicycles, since I’ve noticed people requesting and looking for those more than the about-town cruisers and flat-bar bikes we have for sale, irrespective of how well-suited they are to campus riding.

    Sincerely,

    Jake Benjamin

    Campus Bike Center Manager

  7. EGEN SWATeam Meeting (3.10.17)

    Associated Project(s): 
    Biomass Boiler at the Energy Farm
    Geothermal on Campus
    Solar Power on Campus
    Energy Generation, Purchasing, & Distribution (eGen) SWATeam [ARCHIVED]
    Sustainability iCAP Portal
    Clean Power Agreements Off-Campus

    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: 

  8. iWG Meeting Notes from Jan. 27, 2017

    Associated Project(s): 
    iCAP Working Group (iWG)
    Reduce Cooling Tower and Chiller Plant Water Use
    Indoor Bike Parking
    Green Lab Program

    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 tracker

    Attached Files: 

  9. Sustainability staff discussed the outreach programs on the portal

    Associated Project(s): 
    Sustainability iCAP Portal
    Certified Green Office Program (CGOP)
    Earth Week
    Student Sustainability Leadership Council (SSLC)

    Morgan Johnston, Catherine Yee, and Chenxi Jiang met today to discuss the outreach information listed on the iCAP Portal.  Catherine described the Student Sustainability Leadership Council (SSLC) and the Certified Green Office Program (CGOP).  We also discussed the Earth Week efforts and the overall purpose of the SSLC as a networking opportunity for students in sustainability groups.

  10. Weekly Update

    Associated Project(s): 
    Campus Bike Center
    Bicycle Education

    All, last week we had 114 visitors. We grossed $997.25. We sold two bikes for $210 and six memberships for $180. The new hires are coming along, with only minor hiccups here and there.

    Last week Lily and I assisted with the University High School Agora Days class that a Bike Project member was leading.  For Four days last week we went over various bike repair basics, focusing on tires/tubes, minor brake adjustments, chains, and a how-to on bike fitting. The kids were genuinely interested and engaged, and no one minded getting a little dirty. The only downside was the one-hour limit on each day’s class.

    Lily and I also met to discuss the implementation of some bike classes for which she so adeptly secured funding.

    This week I will get a job posting up for more student workers, as one new hire is MIA and a few others are graduating. I will continue to work on the departmental bike share bikes for F&S as well as bikes for sale here, as our stock isn’t quite as robust as I would like pre-spring rush.

    Sincerely,

    • Jake Benjamin
      Campus Bike Center Manager

  11. Water & Stormwater SWAT Meeting Minutes 2/23/2017

    Associated Project(s): 
    BIF Greywater Pipe System
    Water Conservation [ARCHIVED]
    Reduce Potable Water Usage
    Energy Dashboard Project
    Water and Stormwater SWATeam [ARCHIVED]
    Obtain and Publicize Water Data

    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: 

  12. Requesting approval as Master Naturalist volunteer site

    Associated Project(s): 
    Red Oak Rain Garden

    The ECIMN Advisory Board meets on the third Monday of the month from 3-5 pm.  Karen Folk and Eliana Brown will present the Red Oak Rain Garden as a requested site for approval as an official volunteer location for the Master Naturalists.  Once Board approval is granted, Maddy Kangas will work to complete the MOU with F&S, similar to the Idea Garden agreement.

    The effort could be set up in three phases: 1. Assessment 2. Renovation 3. Maintenance.

  14. Arbor Day Celebration planned for April 28, 2017

    Associated Project(s): 
    Tree Campus Higher Education

    Five trees will be planted on the South Quad of campus, for the Arbor Day Celebration, on April 28, 2017. The agenda includes a welcome, a reading of the proclamation, an educational speech, the tree planting, and a trivia game.  Attendees will each be invited to add a shovel of soil to the newly planted trees.

  17. MAster Naturalist intern notes

    Associated Project(s): 
    Red Oak Rain Garden

    "I walk by that rain garden almost every day and have been picking up trash, etc.  It would be great if we could get the original plan from Dr. Tony Endress that shows what was planted.  From my observations, the rocks need replenished, possibly removal of fabric underlayment, and, if we had the plan, we could do a census of surviving plants.  The Native Plant sale is coming up in May and if we had a plan by then, we could buy and plant replacements.  I am willing to monitor when students aren't available and work with them in whatever capacity they are anticipating.

    Karen Folk"

  18. Weekly Update

    Associated Project(s): 
    Campus Bike Center

    All, last week we grossed $506.80. We sold one build-a-bike for $35 and two memberships for $60. We had 60 visitors to the shop.

    We were inundated this past week with volunteers, which isn’t a bad thing but is difficult to come up with enough unskilled jobs in a very skill-demanding environment. Thankfully, the organizing never ends! I made some good progress on the wheel storage rack in the back corner of the CBC and it will be completed by the end of the day today. While not the best built thing out there, it will get the job done and allow us to store more wheels safely out of the way and off the ground.

    This week will be truncated since I was sick over the weekend and did not work on Monday or Tuesday. But good news: Lily has secured funding for some basic maintenance classes for the spring! Way to go Lily! I will meet with her next week and discuss the details. This week I will start recruiting again for more hires since four of the current CBC staff are graduating in May and at least one more will not be around to help in the summer.

    Sincerely,

    • Jake Benjamin
      Campus Bike Center Manager

  19. ECBS SWATeam meeting minutes

    Associated Project(s): 
    Illini Lights Out
    Green Lab Program
    Eco-Olympics
    Earth Week
    Energy Conservation and Building Standards (ECBS) SWATeam [ARCHIVED]

    On the agenda at the ECBS SWATeam meeting:

    1) Discussion of recommendation process as developed and described in the iCAP;

    2) Illini Lights Out final planning for 10th of February;

    3) Update on fume hood work;

    4) North America Laboratory Freezer Challenge update;   5) Planning for Earth Week.        

     

     

     

     

     

    Attached Files: 

  20. Eco-Olympics information and application requests

    Associated Project(s): 
    Eco-Olympics

    It’s time for promoting and encouraging energy conservation in the halls through Eco-Olympics energy competition, we are displaying the coveted trophy in various locations around housing starting this week through the end of the competition. The grand prize, a catered banquet is secured and awaiting the winning hall!

    New to this year’s competition!

    1)      We are asking Chancellor Jones to be the signatory for the leadership certificates this year.

    2)      We are also supporting a participation prize of $200-$500 for the hall with the most and best participation efforts, your thoughts on this and more on that in a minute.

    3)      All Eco-Olympics meetings will be held at your individual hall, accommodating busy schedules and making it easier to attend.

    4)      Housing is helping with marketing support for the competition and individual halls.

    5)      We have been working with campus utilities to identify meters that are impacted by students and only recording energy usage from these meters to better gauge the teams efforts.

    Is your hall competing? 
    If you have not seen, flyers posted, group meetings held, plans for participation events or heard conversation about Eco-Olympics it is time to stir the pot and get your residents in contact with us.

    • Committed Halls are: Allen, LAR, Busey-Evans, FAR, and ISR (Wardall)
    • Halls that have expressed interest (someone signed up but has not followed up with email communication): Bousfield, Barton, Lundgren and Nugent

    This leaves us with nine (9) buildings competing at various levels of effort, we are shooting for 12-15 buildings this year and would like your help in making this happen?

    If your hall is not listed as “committed” help us get the word out by contacting us, we will make arrangements for a  presentation/recruiting opportunity and marketing materials to be distributed.

    Your input is Greatly appreciated, this year we are measuring participation efforts and awarding a financial incentive (between $200-$500) to the hall with the highest level of participation. This will be measured by number of team member’s signup with Eco-Olympics from each hall, number of events held in the hall, and number of participants at each event, verified through organization representatives, and photos of the event.
    What we would like from you is to let us know your thoughts on the idea of motivating participation with a $200-$500 incentive for your residents. This prize could be used for the students in any way they like, of course we would encourage it to be used for sustainability and energy conservation efforts, but that would not be mandatory.

    We are looking forward to our best and biggest competition ever!

     

    Thank  you 
    Paul Foote

    Think Globally. Act Locally.

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