Presentation on the Energy Efficiency in schools: a learning oportunity workshop held in Coimbra on the 17 of June 2010. This presentation is about the work done on energy efficiency in Helsinky schools.
1. SAVE ENERGY
SAVE ENERGY Energy Audits in Helsinki
Katri Kuusinen
City of Helsinki
June 17th, 2010
2. Background for Energy Efficiency Work
• Energy Saving Board established 1974
• Annual energy consumption monitoring and reporting started in 1978
• First national Energy conservation agreement in 1993
• First energy audits in 1994 (government subsidies 40 – 50 %)
• Monthly energy consumption monitoring and reporting started in 1995
• Objective in national voluntary Energy and climate agreement
– 80 % of public buildings to be energy audited by the year 2005
• Objective in Energy Efficiency Agreement in 2008
– 9 % energy saving from the level of 2005 until 2016 (city organization)
• Objective in Energy policy lines (2008) and in Covenant of Mayors (2009)
– 20 % CO2 emission reduction from the level of 1990 by 2020
3. Energy Audits in Public Buildings
• 80 % of the building stock energy audited
– 11,2 million cubic meters
– 3,6 million square meters
– 500 energy audits
• Average results, saving potential
– Heat 13 %
– Electricity 9 %
– Water 6 %
• Average payback period of reported saving actions 1.3 years
• Future: energy audits for new buildings, new energy audits
for buildings with major changes & changes in energy
consumption figures, follow-up energy audits after 10 years
4. Schedule of Energy Audits in Save Energy
• Energy audits made by certified energy auditors of a private
consulting company
• Audit work from February to May
• Kitchen electricity consumption measurements 6 weeks in
April-May
• Preliminary reports in May-June
• Final reports (after commenting & handover meetings) in
October
5. Included in the Energy Audits
• Total electricity, heat and water consumptions of the total
building, not just pilot application areas
• Calculation of energy consumption distributions based on
installed power and operational times of equipment
• Momentary room temperature measurements
• Continuous electrity consumption measurement for 6 weeks
in the kitchen of Ala-Malmi School
6. Energy consumption distributions in
Ala-Malmi
Heat consumption Electricity consumption
1367 MWh/a 306 MWh/a
Other Indoor
Hot IT equip- lighting
water equip- ment 17%
2% ment 6% Outdoor
12 % lighting
Venti- 6%
lation
Kitchen
32 %
Heating 17%
66% HPAC
42 %
7. Energy consumption distributions in
Pihkapuisto
Heat consumption Electricity consumption
380 MWh/a 280 MWh/a
Plug-in Other
Hot equip- equip- Indoor
water ment ment lighting
Heating
7% 12 % 6% 22% Outdoor
17% lighting
Kitchen 4%
18%
Venti-
lation HPAC
32 % 42 %
8. Monthly consumptions in Ala-Malmi
Heat Consumption Electricity consumption
250 35
30
200
25
150 20
100 15
10
50
5
0 0
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
9. Monthly consumptions in Pihkapuisto
Heat Consumption Electricity consumption
60 30
50 25
40 20
30 15
20 10
10 5
0 0
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
10. Results in Ala-Malmi
• Saving potential
– Heat 5 %
– Electricity 15 %
– Water 4 %
• 15 proposed saving actions with profitability calculations
• 6 proposed actions in check-list
• Payback period of proposed actions on average 0.4 years
(varying from 0 to 4.3 years)
• Required investments 1,960 €
11. Results in Pihkapuisto
• Saving potential
– Heat 16 %
– Electricity 20 %
– Water 4 %
• 10 proposed saving actions with profitability calculations
• 5 proposed actions in check-list
• Payback period of proposed actions on average 2.1 years
(varying from 0 to 7.5 years)
• Required investments 22,600 €
12. Examples of proposed saving actions
• Changing the operational time of ventilation units
• Lowering the temperature of inlet air
• Refurbishment of heat recovery unit
• Shutting down computers during the nights
• Replacing incandescent lighting with fluorescent lighting
• Changing the adjustments in the control system of lighting
• Installation of limiting nozzles in water taps and showers
13. Challenges in implementing the actions
• Resources for investments
– Budget
– Personnel
• Distributed responsibilities and benefits
– Building owner
– Building end-user
– Building maintenance provider
– Building energy use expertise
• Commitment of city personnel in all organization
levels
14. Education for staff and citizens
• Training of Eco Supporters (city organizations)
• During Energy Awareness Week (week 41 every year)
– Campaigns for citizens, employees and school children
• For schools
– Training occasions in schools
– Visits to the tropical garden Gardenia (greenhouse) and
lessons about “how to reduce greenhouse gas emissions”
– “Everything’s Working” educational material package for
teachers and school children
– 30,000 children have participated
• Display poster (energy certificate) delivery trainings
15. Energy Certificates in City of Helsinki
• Finnish Act on Energy Certificates
– Compulsory for new buildings and buildings sold or rented
out
– Voluntary for other existing buildings – public buildings
– Helsinki provides public buildings with Display® Posters
• Display® – to motivate and activate building users
– Developed in EU-project coordinated by Energie-Cités
– Financed by EU – Intelligent Energy Europe Programme
– First Display poster in 2006 to city’s office building
– 150 buildings in Helsinki have received Display posters
