NUI Galway Energy Management Bureau
Energy & Water Conservation
Awareness Training
Dermot Buttle MIEI
Enerit Ltd, Galway
www.enerit.com
© 2010 Enerit Ltd.
Agenda
Introduction
NUIG Energy & Water Usage
• Annual Energy Use
• Energy Performance Indicator (EPI) Benchmark
• Day/Night/Weekend Profiles
What Can You Do?
• The Small Things – bigger than you might think!
Questions & Your Energy & Water Saving Ideas
© 2010 Enerit Ltd.
Introduction
• NUI Galway Energy Management Bureau established 2010
• College wide activity (all departments & buildings)
• Operated and managed on behalf of NUIG by Enerit
• Systematic approach to energy management (IS393, EN 16001)
– Technical & People & Management
• Long term commitment
• Targets
– 7.5% electricity savings in 2011
– 10% water usage savings in 2011
© 2010 Enerit Ltd.
Introduction
• Co-operation and involvement of everyone at NUI
Galway is essential
– i.e. academic staff, students, service providers,
cleaners, security etc.
© 2010 Enerit Ltd.
Consumption & Costs
Costs
• Energy Costs
• Water
> €3m (€8,000 per day)
> €300k (€1,000 per day)
Consumption
• 13 million units (kWh) of Electricity (1700 households)
• 15 million units (KWh) of Natural Gas
• 140 million litres of water (56 Olympic swimming pools)
• Electricity accounts for 70% of energy costs
-
69% of C02 emissions (approx. 9000 tonnes)
• Water charges due to rise significantly in coming years
© 2010 Enerit Ltd.
Electricity Consumption
3,000,000
(based on largest bills covering 75% of all electricity )
2,500,000
kWh
2,000,000
1,500,000
1,000,000
500,000
0
© 2010 Enerit Ltd.
Natural Gas Consumption
3,000,000
2,500,000
kWh
2,000,000
1,500,000
1,000,000
500,000
0
Month
© 2010 Enerit Ltd.
NUIG Water Consumption
14,000,000
12,000,000
Litres
10,000,000
8,000,000
6,000,000
4,000,000
2,000,000
-
© 2010 Enerit Ltd.
Energy Saving Technologies
• €2m+ spent since 2007 on energy saving technologies
including:
–
–
–
–
–
–
–
Combined Heat & Power (CHP)
Biomass boiler (quadrangle)
Solar panels (library roof)
Rain water harvesting (Quadrangle)
sub metering of electricity, gas and water
Building Management Systems (BMS)
Energy efficient lighting (T5 and motion/light sensors)
© 2010 Enerit Ltd.
Sustainability/Environmental
Energy Reduction & Sustainability Projects 2007-2010
• Water Saving Measures
– Water metering project; >20 meters across campus
– Replacement of 40% of cold water mains pipe work in 2010
– Active leak detection program, internal and external
– Installation of water savers in cisterns
© 2010 Enerit Ltd.
Why Energy Management
•
Economic benefits - Significant cost savings can be achieved considering
annual energy bill > €3m
– Savings will be ring fenced for further sustainable projects.
•
Environmental benefits - environmental benefits through significant
reduction in greenhouse gases
– “The economy is a wholly owned subsidiary of the environment, not the other way
around” - Gaylord Nelson, Earth Day founder
•
Legislation - The public sector has been challenged to take the lead in
demonstrating energy efficiency savings.
– Ireland’s vision for 2020 is a 20% reduction in energy use,
– but for the public sector the improvement must be 33%,
– a target that calls for management commitment at the top and the broader
engagement of all. (NEEAP)
•
Other benefits – Improved comfort levels for all & nicer working
environments in existing and new buildings (USGBC LEED)
© 2010 Enerit Ltd.
Water Consumption
© 2010 Enerit Ltd.
© 2010 Enerit Ltd.
Water Consumption Benchmarks
• 140,000,000 litres per annum used in NUIG
• (equivalent to 56 Olympic swimming pools)
• In Ireland:
– average consumption is 148 litres per person per day (54,000
litres per annum)
– Average of 50 litres per person in business (11,000 litres per
annum)
• A tap dripping once a second wastes about 10 m3 or
10,000 litres of water a year.
• A power shower uses almost 125 litres of water in 5
minutes. That's a massive 250 litres in 10 minutes!
© 2010 Enerit Ltd.
Water Saving tips
• Make sure taps are not left running.
• Make sure all taps are drip free
–
Report any maintenance issues to Discipline Liaisons. For
a list of Discipline Liaisons please go to the Building and
Services webpage and click on Maintenance and
Projects.
– Further water saving tips can be found at:
http://www.taptips.ie
© 2010 Enerit Ltd.
Electricity Consumption
© 2010 Enerit Ltd.
Night Energy?
• How much electrical energy is used at night compared
to office hours?
© 2010 Enerit Ltd.
Time
© 2010 Enerit Ltd.
00:00
23:00
22:00
21:00
20:00
19:00
18:00
17:00
16:00
15:00
14:00
13:00
12:00
11:00
10:00
09:00
08:00
07:00
06:00
05:00
04:00
03:00
02:00
01:00
00:00
kW
Example Daily Electrical Load Profile
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
Night Energy?
• Would you believe 31%?
© 2010 Enerit Ltd.
Night Energy?
• Would you believe approx 31%?
• This is between 11pm and 8am!
© 2010 Enerit Ltd.
Weekend Energy?
• How much energy is used at weekends compared to
office hours?
© 2010 Enerit Ltd.
Monday 
Time
© 2010 Enerit Ltd.
Sunday
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
Demand (kW)
Example Weekly Electrical Load Profile
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
Weekend Energy?
• Would you believe approx 16%?
© 2010 Enerit Ltd.
Electricity Consumption
'Office Hours'
53%
© 2010 Enerit Ltd.
Unoccupied
47%
What can You do in Your Building?
• Switch things OFF
• Switch things OFF ……. EARLY
• Switch things OFF ……………………..OFTEN
© 2010 Enerit Ltd.
Example Daily Electrical Load Profile
90
85
80
75
70
65
60
55
45
40
35
30
25
Large electricity savings potential
20
6pm
15
10pm
Can we reduce demand quicker at end of the day?
10
5
Time
© 2010 Enerit Ltd.
00:00
23:00
22:00
21:00
20:00
19:00
18:00
17:00
16:00
15:00
14:00
13:00
12:00
11:00
10:00
09:00
08:00
07:00
06:00
05:00
04:00
03:00
02:00
01:00
0
00:00
kW
50
Example Weekly Electrical Load Profile
95
90
85
80
75
70
65
55
50
45
40
35
30
25
20
Large electricity savings potential
15
10
Can we reduce the night & weekend demand?
5
Monday 
Time
© 2010 Enerit Ltd.
Sunday
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
0
00:00
Demand (kW)
60
Office Equipment
© 2010 Enerit Ltd.
© 2010 Enerit Ltd.
What Can you
Switch OFF?
The ‘Small’ Things:
•
•
•
•
•
•
Computers & Monitors
Printers
Photocopiers
Lights
Fans
Electric heaters
© 2010 Enerit Ltd.
© 2010 Enerit Ltd.
Popular Misconception
"Computer screens in "screen saver" mode save
energy."
• UNTRUE: when a computer screen is in "screen saver"
mode, it does not save any energy. Screens should be
turned off rather than leaving them in screen saver mode.
© 2010 Enerit Ltd.
© 2010 Enerit Ltd.
Switch OFF the Bigger Things
•
•
•
•
Lights
Water Heaters
Electric Heaters
Air conditions units
THESE CAN BE 10 TIMES MORE ENERGY CONSUMING
THAN THE SMALL THINGS.
© 2010 Enerit Ltd.
Lighting
© 2010 Enerit Ltd.
© 2010 Enerit Ltd.
Popular Misconception
"Switching off fluorescent lights costs more than
leaving them switched on."
• UNTRUE: if a fluorescent light is not required, it is always
more efficient to turn it off than to leave it on. (This might
have been true for older lights.)
© 2010 Enerit Ltd.
Heating
© 2010 Enerit Ltd.
© 2010 Enerit Ltd.
Heating
• Windows left open – close
– If possible, keep track of repeated instances.
• If electric heater is on switch it off
– Do not unplug from wall as may be on a timer.
© 2010 Enerit Ltd.
There are approx 500 electric
heaters throughout NUIG
2000W * 500 =
1MW
© 2010 Enerit Ltd.
Storage Heaters
• INPUT
– control tells the heater how much heat to
store up, during the night
– setting it on 4 (out of 6) means the elements
will shut off when the box is 2/3 full.
• OUTPUT
– control tells the heater how much heat to let
out into the room
© 2010 Enerit Ltd.
Storage Heaters
Tip
– If your room is cold by the evening, check that
the OUTPUT is turned down overnight and
the INPUT is set high enough
© 2010 Enerit Ltd.
Summary
© 2010 Enerit Ltd.
Water Saving tips
• Make sure taps are not left running.
• Make sure all taps are drip free
– Further water saving tips can be found at:
http://www.taptips.ie
© 2010 Enerit Ltd.
Energy Saving Checklist
•
•
•
•
Switch off Lights
Switch off Electric Heaters
Switch off Computers & Monitors
Switch off Printers
• Close Windows
... and do it early
© 2010 Enerit Ltd.
Reporting of Maintenance Issues
• Report any maintenance issues to
Discipline Liaisons. For a list of Discipline
Liaisons please go to the Building and
Services webpage and click on
Maintenance and Projects.
© 2010 Enerit Ltd.
90
85
80
75
70
65
60
55
45
40
35
30
25
Large electricity savings potential
20
6pm
15
10pm
Can we reduce demand quicker at end of the day?
10
5
Time
© 2010 Enerit Ltd.
00:00
23:00
22:00
21:00
20:00
19:00
18:00
17:00
16:00
15:00
14:00
13:00
12:00
11:00
10:00
09:00
08:00
07:00
06:00
05:00
04:00
03:00
02:00
01:00
0
00:00
kW
50
Time
© 2010 Enerit Ltd.
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
00:00
18:00
12:00
06:00
5
00:00
10
18:00
15
12:00
06:00
00:00
18:00
12:00
06:00
00:00
Demand (kW)
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
Large electricity savings potential
Can we reduce the night & weekend demand?
0
Feedback & ideas
Send your Questions & Your Energy and Water Saving
Ideas to:
• greencampus@nuigalway.ie
or
Contact:
• NUI Galway Energy Champion: Sinead Higgins & Aoife Collins
• Email: aoife.collins@nuigalway.ie (091) 495944
•
Enerit: Mike Brogan
• Phone: (086 8310485)
• Email: mike_brogan@enerit.com
© 2010 Enerit Ltd.
Go Raibh Maith Agaibh!
© 2010 Enerit Ltd.