Why residential energy efficiency moves slowly

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Orsolya Németh
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Rīgas Tehniskā universitāte Enerģētikas un elektrotehnikas fakultāte Vides aizsardzības un siltuma sistēmu institūts www.videszinatne.

1 Rīgas Tehniskā universitāte Enerģētikas un elektrotehnikas fakultāte Vides aizsardzības un siltuma sistēmu institūts Why residential energy efficiency moves slowly and how to speed it up? Prof.Andra Blumberga Riga Technical university th Baltic Housing Conference Energy Saving in the Residential Sector- Country Experiences, Tallinn

2 System archetype: Energy Addiction + Addiction Atkarība no to importa + Symptomatic Simptomātisks solution: risinājums: IMPORTS + Enerģijas Energy deficīts deficit + Fundamentāls Fundamental risinājums: solution: ATJAUNOJAMIE RENEWABLE ENERGY SOURCES ENERGORESURSI and ENERGY EFFICIENCY ENERGOEFEKTIVITĀTE

3 LATVIA S POLICY ON BUILDING ENERGY EFFICIENCY

4 National energy end-use and energy efficiency goal

5 In 2010 Residential 52 GWh Energy efficiency goals Agriculture Transport 0 GWh Total 4 GWh In2016 Industry 3 GWh 67 GWh Services 8 GWh Agriculture 11 GWh Residential 2701 GWh Total 3483 GWh Transport 204 GWh Industry 159 GWh Services 408 GWh

6 Policy measures in residential sector Energy audits in buildings and building energy certification Subsidies for energy efficiency measures in multi-apartment buildings Informing energy consumers Development of secondary legislation

7 System dynamics model base scenarios: technology diffusion 3rd scenario (optimistic) 2nd scenario (moderate) st scenario (pessimistic) Years

8 1) Netbenefits max 2) Uncertainty costs min

9 Energy efficiency policy tools used in the system dynamics model Energy consumption standarts; Quality of energy audits; Reaserch and develpment; Standard procurement documentation and contracts; Quality control of construction works; CO2 tax; Subsidies; Energy service companies; Information distribution; One stop shops; Champion effect.

10 Existing policy tools tika izslegta; itika ieslegta Total_Insulated_Area olitika a; 0.8 esosa With subsidies(1) and without subsidies(2) it is possible to save only 55 GWh until 2016, i.e. 2% of the planned savings. the required reduction in consumption using this policy could not even be achieved by Energy audits in buildings and building energy certification Subsidies for energy efficiency measures in multi-apartment buildings Informing energy consumers Development of secondary legislation

11 No 1. Energy efficiency policy Development of onestop shop With energy efficiency policy Implementation of First Energy Efficiency Action Plan, % 3.3 % 2. Introduction of CO 2 tax 3.2 % Increase in minimum 3. energy efficiency requirements Increase in research 4. and development support Development of standard procurement 5. documentation and contracts Introduction of 6. information campaign All energy efficiency 7. policies simultaneously 2.0 % and development 5.6 % 3.5 % 2.5 % 21.6 % 8. Only subsidies 2.0 % tika izslegta; itika ieslegta Total_Insulated_Area olitika it is possible to save only 583 GWh by 2016, i.e. 21.6% of the planned savings. the required reduction in consumption using this policy could only be achieved by

12 ENERGY SERVICE COMPANY IN RESIDENTIAL SECTOR IN LATVIA

13 Multi-family building in Gaujas ielā 13, Valmiera Heated area 1914,6 m 2 High energy consumption for heating (183 kwh/m2year) and hot water preparation First ESCO project in residential sector in Latvia Sun Energy Baltics

14 Before renovation U=0.82 W/m2K 30 mm 150 mm 220 mm

15 Before renovation U=1.18 W/m2K U=2.4 W/m2K U=1.36 W/m2K U=2.8 W/m2K

16 Heating system

17 Heating and hot water system Connection to appartment Hot water heaters

18 Energy consumption before renovation /year MWh/ Normalized space heating DHW preparation DHW circulation losses

Changing of doors Change of hot water system Partly change of

19 Energy efficiency measures Wall insulation (10cm) Insulation of attic (20cm) and basement ceiling (10cm) Changing of windows Changing of doors Change of hot water system Partly change of heating system Reconstruction of heating substation Monitoring system

20 Improvements in heating system

21 Renovation of hot water system Water meter Flow measurement Prefabricated heat insulation

22 Monitoring system Regulation of heating and hot water systems Consumption data collection Inhabitants can follow energy consumption Control of internal comfort Warning on deviation from the target( ..)

24 Additional measures

25 Investments, EUR Measure EE measure Non-EE measures Total Building envelope insulation Renovation of roof Changing windows Fixing balconies Stair cases, entrances Ventilation systems Other costs Renovation of heating substation Renovation of heating system Renovation of hot water system Monitoring system TOTAL Specific investment = 107 EUR/m2

26 After energy efficiency measures savings 50% MWh/yea ar Exisitng Forecast Normalized space heating DHW preparation DHW circulation losses Energy savings

C 21 Telpas gaisa tem peratūra, 20 19 18 17 16 15 1

27 Indoor comfort Average indoor temperature: Gaujas 9: +18,3 o C Gaujas 11: +20,0 o C Gaujas 13: +21,6 o C o C 21 Telpas gaisa tem peratūra,

28 Compared to other buidings

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