SAVE ENERGY
SAVE ENERGY Energy Audits in HelsinkiKatri KuusinenCity of HelsinkiJune 17th, 2010
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
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
Schedule of Energy Audits in Save Energy
• Energy audits made by certified energy auditors of a privateconsulting 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
Included in the Energy Audits
• Total electricity, heat and water consumptions of the totalbuilding, 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 weeksin the kitchen of Ala-Malmi School
Energy consumption distributions in Ala-Malmi
Heating66%
Venti-lation32 %
Hot water
2%
Heat consumption 1367 MWh/a
Indoor lighting
17%Outdoor lighting
6%
HPAC42 %
Kitchen17%
IT equip-ment12 %
Other equip-ment6 %
Electricity consumption 306 MWh/a
Energy consumption distributions in Pihkapuisto
Heating17%
Venti-lation32 %
Hot water
7%
Heat consumption 380 MWh/a
Indoor lighting
22% Outdoor lighting
4%
HPAC42 %
Kitchen18%
Plug-in equip-ment12 %
Other equip-ment6 %
Electricity consumption 280 MWh/a
Monthly consumptions in Ala-Malmi
0
50
100
150
200
250
Jan Mar May Jul Sep Nov
Heat Consumption
0
5
10
15
20
25
30
35
Jan Mar May Jul Sep Nov
Electricity consumption
Monthly consumptions in Pihkapuisto
0
10
20
30
40
50
60
Jan Mar May Jul Sep Nov
Heat Consumption
0
5
10
15
20
25
30
Jan Mar May Jul Sep Nov
Electricity consumption
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 €
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 €
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
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
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
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
Display Poster
Thank You!www.hel.fi