Water Resource Management Utilities and Energy Management – Facilities Operations and Development 1. Objectives of the 2012 water audit 2. Methodology 3. Results 4. MELS’s objectives & Water Conservation Measures

October 11, 2012

1. Water Audit - Objectives

• Estimate water consumption of downtown campus

• Break down consumption per building/usage

• Investigate Water Conservation Measures (WCM)

• Evaluate potential of WCMs

• Added objectives (from SPF):

• Give opportunity for student projects

• Communicate findings to the community

In progress

2. Water Audit - Methodology

• Main buildings only – Downtown

• Five categories:

• Operational Water-cooled equipment, cooling towers, boilers, hot water closed circuits, chilled water closed circuits, maintenance sinks

• Hygiene Bathroom sinks, urinals, toilets, kitchen sinks, drinking fountains, showers

• Landscaping

• Food Services Water used to process food, wash dishes, and for coffee/tea and other beverages

• Research and Academia Identified research, estimated remaining research

2. Water Audit - Operational

• From Building Operations: metered data re. cooling towers, hot and chilled water closed circuits

• From Utilities & Energy Mgmt: metered data re. boilers

• From Building Services: info re. custodial

• From BPA/Adrian N.: estimate of water consumption of once-through water-cooled equipment

2. Water Audit - Hygiene

• Survey of fixtures (bathroom sinks, urinals, toilets, sinks, drinking fountains, showers) based on floor plans

• Walkthrough of building to confirm information on floor plans + note age of the fixture

• Find reference re. amount of water used by usage of the fixture (e.g., liters per flush)

• Estimate number of use of each fixture per building (based on even density of occupation)

• Compile data for each building

2. Water Audit – Landscaping & Food

• Landscaping: Estimate water consumption based on data from Ground Services: frequency of watering of trees, flower beds, etc.

• Food Services: Survey of fixtures on floor plans + walkthrough of buildings + estimate of coffee/tea consumption per person per day. Note: no major cafeteria included in study.

2. Water Audit – Research and Acad.

• “The biggest unknown”

• Contacted building directors to be in touch w lab technicians / building occupants. Very little feedback.

• Walkthrough of the buildings.

• Good feedback from Animal Facilities (re. cage washers, aquariums in Stewart Biology)

2. Water Audit – Compiling Data

Known and unknown parameters:

• Operational: known

• Hygiene: known (estimated)

• Landscaping: known (estimated)

• Food Services: known (estimated)

• Research: mostly unknown

Metered data from City for

• McIntyre Medical

• Stewart Biology

• Life Sciences

• Chancellor Day Hall

1. Compare compiled data to metered data for these buildings, assign

difference to Research and Academia

2. Extrapolate Research and Academia to the other buildings audited

3. Extrapolate result to the rest of the campus

3. Results

Total annual consumption – Downtown Campus

• 1.8 to 2.3 million cubic meters (1.8 to 2.3 billion litres)

• Equivalent of 720 to 920 Olympic pools

• Equivalent of Kheop’s Pyramid

• Equivalent of flooding the Island of Montreal under 5 cm of water

3. Results – Breakdown per Category

Hygiene 206,031 m3

16.35% Food Services

677 m3 0.05%

Operational 411,390 m3

32.65%

Landscaping 1,080 m3

0.09%

Research and Academia

640,953 m3 50.86%

Total Annual Water Consumption

3. Results – Breakdown|Operational

Cooling towers 90,480 m3

21.99% Chilled Water Closed Circuit 35 m3 0.01%

Hot Water Closed Circuit 168 m3 0.04%

Water Cooled Equip. 266,914 m3

64.88%

Maintenance Sinks 5,725 m3

1.39%

Boilers 48,069 m3

11.68%

Operational Annual Water Consumption

3. Results – Breakdown|Hygiene

Toilets 76,761m3 37.26%

Urinals 6,924m3 3.36%

Bathroom Sinks 116,531m3

56.56%

Kitchen sinks 3,655 m3

1.77%

Drinking Fountains 2,067m3 1.00%

Showers 92 m3 0.04%

Hygiene Annual Water Consumption

3. Results – Breakdown|R&A

Identified Research 168,729 m3

26%

Estimated Remaining Research

472,224 m3 74%

Research & Academia Annual Water Consumption

3. Results – Breakdown|R&A

Toilets 76,761m3

6.09%

Urinals 6,924 m3

0.55%

Bathroom Sinks 116,531 m3

9.25%

Kitchen Sinks 3,655 m3

0.29%

Drinking Fountains 2,067 m3

0.16%

Showers 92 m3 0.01%

Food Services 677 m3 0.05%

Cooling Towers 90,480 m3

7.18%

Hot Water Closed Loop

35 m3 0.00%

Chilled Water Closed Loop

168 m3 0.01%

Water Cooled Equipment 266,914 m3

21.18%

Maintenance Sinks 5,725 m3

0.45%

Boilers 48,069 m3

3.81%

Landscaping 1,080 m3

0.09%

Known Research 168,729 m3

13.39%

Unknown Research 472,224 m3

37.47%

Total Annual Water Consumption

4. MELS Objectives

10% reduction by 2014-04, 20% by 2017-04 – Relative to “baseline”

• General recommendations: install water flow meters and audit main remaining

buildings (self-funded units (Athletics, Residences, SSMU, Student Services), Strathcona Music, New Music, Ludmer, Duff Medical, and Macdonald Campus)

• Hygiene: • Continue policy on installing low flow equipment during renovations (5%) • Consider of grey water, such as rain water in new development (3%)

• Operational:

• Consider reusing blow down water from cooling towers as gray water in new development (1.4%) • Replace once-through cooling units with air cooled units, connect equipment to the cooling tower

circuit, or install individual evaporators and condensers (15%) • Install new water treatment technology for the cooling towers. New chemical free water treatment

methods are available on the market.

• Research and Academia: • Look into cage washer water reuse technology. • Reuse water concentrate from reverses osmosis systems.