Energy efficiency status of building stock in Riga Smart City Sustainable Energy Action Plan

Transcription

1 Energy efficiency status of building stock in Riga Smart City Sustainable Energy Action Plan Juris Golunovs, Head of Energy Efficiency Information Centre of Riga Energy Agency International workshop with Copenhagen and Frederiksberg municipalities representatives Riga City Hall, Riga, 28th of May, 2015

2 EU green city index of Riga (Siemens evaluation)

3 Covenant of Mayors It means that by 2020 the city commits itself to reduce CO2 emissions by at least 20 % by improving energy efficiency by 20 % and by ensuring that renewable energy sources account for 20 % of volume of energy to be used

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5 OBJECTIVES In order to reduce CO2 emissions by 2020, the SEAP proposes measures to increase energy efficiency (EE) and the use of renewable energy resources (RES) in the public and private sectors. The Riga Smart City SEAP provides for actions and measures to reduce CO2 emissions both directly and indirectly: Measures implemented in municipal bodies and companies, Indirectly the municipality promotes CO2 emission-reducing measures among households in residential buildings.

6 Decision maker Mayor of Riga to sign Covenant of Mayors Riga City Council Stakeholders Riga Energy Agency Municipal institutions and departments Municipal enterprises DH company partially owned by the municipality Other energy suppliers (electricity, gas) Households and other energy consumers Barriers Lack of awareness of inhabitants on EE & RES issues Lack of supportive financial tools Inappropriate performance of existing infrastructure Passive resistance of low income residents on EE improvements in their households Drivers Growing energy bills Necessity of greenhouse gas emissions & air pollution reduction Riga Smart City SEAP which is integrated with the other city strategic development planning documents is promoting achievement of progress towards a city with a high value-added and resource efficient economy, also contributes to development of a low-carbon economy

7 Calculated CO 2 emissions in Riga thous t 5000,0 4500,0 4000,0 3500,0 Transport Final fuel consumption Electricity consumption DH consumption 3000,0 2500,0 2000,0 1500,0 1000,0 500,0 0,

8 Evaluated potential of demand side emission reduction measures, year thous t CO 2 Electric cars in transport Biofuel in transport solar heat collectors heat pumps in decentralised heat supply Renovation of municipal buildings Renovation of multi dwelling residential buildings Total "Rigas Siltums" 0 Min Opt Max

9 Selecting the extent of energy efficient renovation of buildings [kwh/m2] kwh/m ,5 104,1 76,6 13,4 9,3 status quo 8L 5L 3,5L 1,5L Page 9

10 Enerģijas patēriņa struktūra daudzdzīvokļu dzīvojamās mājās Elektroenerģija 10% Dabas gāze virtuvēs 4% Space heating demand share in housing energy balance is the main Karstais ūdens 29% Apkure 57% Page 10

11 STATUS QUO? Rīgas pilsētas siltumapgāde Page 11

12 Prefabricated building serial type No.119 energy balance example Calculated value of energy demand for space heating and natural ventilation = 144,29 kwh/(m²a) (LUWOGE consult)

13 Wide range of building types and district heat energy usage in the one district of the city Page 13

14 Energy efficiency assesment of buildings 2.Annex Ministru kabineta 2013.gada 9.jūlija noteikumiem Nr.383 A klase nzeb; B klase Low energy building; C klase Corresponds to the requirements for new buildings D klase for buildings going under mayor renovation; E klase confirms to the average consumption of specific type of buildings; F klase confirms to the acceptable consumption of specific type of buildings;

15 Energy efficiency assesment of buildings (II) 2.Annex Ministru kabineta 2013.gada 9.jūlija noteikumiem Nr.383 Regulations on the energy certification of buildings 17. The building is classified as a nearly zero-energy building, if it meets all the following requirements: energy consumption for heating purposes shall be made no more than 30 kwh per square meter per year, while ensuring that the indoor climate with the laws and regulations of construction, hygiene and occupational health and safety; Total primary energy consumption for heating, hot water supply, mechanical ventilation, cooling, lighting constitute no more than 95 kwh per square meter per year; building uses high-efficiency systems that: provides no less than 75% of the ventilation heat loss recovery during the heating season; at least partially provides use of renewable energy; low-efficient fossil fuel heating system of the building is not installed

16 Impact of the building code corrections λ 0,037W/(m K) < 2014 Thickness insulation material 90mm > W/(m 2 K) Thickness insulation material 170mm

17 Impact of the building code corrections until 1991 Sept Janv Apr until now Roofs W/m2*K 1,3 0,31 0,2 0,11 0,13 Walls (heavy) W/m2*K 1,1 0,36 0,3 0,17 Walls (light) W/m2*K 1,1 0,36 0,25 0,17 Windows W/m2*K 5,9 2 1,8 <1,3 Energy consumption for heating kwh/m2 year ?

18 The new low-energy buildings (I) In 2013 in the competition long-term sustainable building project 2013" two Riga projects were successful - the office building " Upmalas biroji" Mukusalas Street 101, and living house "Futuris" Antonijas street. Upmalas biroji energy efficiency kwh/m²/year (heat and electricity consumption); Futuris (7318,3 m²) 55,52 kwh/m²/ year (heat and electricity consumption);

19 The new low-energy buildings (II) Riga industrial parc Dzelzavas str. 120Z The building is one of the first public buildings in Latvian, which solutions used in the construction, materials and technology, which provides low power consumption during operation. They are selected on the basis of examples of similar buildings in Germany, gaining knowledge and information by visiting specialized exhibitions in Germany. Office building designed by the passive house standard - calculated heat consumption of 15 kwh / m2. Buildings are only used for heating renewable energy sources - ground (geothermal) heat pump (three boreholes around 120m deep). Space heating is provided with heated floors and traditional radiator-type heaters.

20 Rise of cooling demand in the new public buildings

21 Riga s directions for strategic development Smart

22 2001: The first energy efficient renovation in Riga

23 2010: Continious growth of number of energy efficiently renovated apartment buildings in Riga

24 Different scenarious of housing renovation 24

25 Essential is monitoring of results after energy efficient refurbishement of buildings (1) 25

26 Main energy efficiency measures for multi apartment houses (2) Apartments are equipped with modern automated individual substations which allow to set the desired temperature; An innovative solution of system balancing problem is a riser return temperature controlling system with automatic load balancing mechanisms. 26

27 Measures for energy efficiency increase for residential block houses (3) Thermostatic valve is mounted on the return riser cable allowing to set the desired return temperature (Ltd. Danfoss ) 27

28 Measures for energy efficiency increase for residential block houses (4) Realized action Gauja Street 29, Riga 28

29 Measures for energy efficiency increase for residential block houses (4) Apartment individual consumption regulation within installation of a thermostat over the heaters and heat cost allocators: 29

30 Measures for energy efficiency increase for residential block houses (5) 30

31 Monthly specific heat consumption in renovated in comparison with not renovated buildings buildings of serial type No 464.

32 Publicly available apartment house energy efficiency database Riga Energy Agency implemented via website a publicly available database of residential buildings which are connected to the city district heating. The database records are arranged (by the street names) in alphabetical order showing the following data:

33 Publicly available apartment house energy efficiency database (2) For the comparison within the database an average actual specific energy consumption of 101 kwh/m² of year 2012 is taken Example: Useless overdrawn and overpaid (as a percentage) heat in non-renovated house (Vesetas str.8, Riga, year 2012) with consumption of 202 kwh/m2/a x 100 = 50% 202 Initially the database included multi apartment houses managed Ltd. Rīgas namu pārvaldnieks In 2012 avarage, average actual specific heat consumption over nonrenovated multi apartment houses in Riga was 201 kwh / m²/a

34 Publicly available apartment house energy efficiency database (3) Renovated buildings actual specific energy consumption compared with 7 sets of excessive profits by effective specific heat consumption (red line)

35 Support measures to finance renovations Cohesion and EU structural funds National revolving fund for energy efficiency measures ESCO involvement Implementation of administrator service Involvement of power supply companies in order to increase household energy efficiency

36 Shallow renovation or deep renovation (extra costs of additional measures to average scale building envelope insulation)? EUR/m LVL/m2 140,0 120,0 100,0 80,0 Windows (U=1.3) 60,0 Internal heat distribution Ventilation 40,0 Heat source (six options) 20,0 0,0 I II III IV V VI I II Siltuma avots III Ventilācija IV Siltuma V sadale VI ēkā Logi (U=1.3) Pēc ECOFIS pētījuma

37 Shallow renovation or deep renovation? Selecting by financially efficient U-values [W/m2 x K] of building constructions? What else? Riga U-values for better buildings Ecofys GmbH

38 Extra investments for deep renovation of buildings Paldies par uzmanību

39 Riga Energy Agency performs monitoring of renovation results specific energy consumption per square meter of heated floor area kwh/m2

40 Municipal support measures for renovation Municipal support measures for renovation REA implemented Energy Efficiency Information Center Riga City Council issued binding rules on the procedure for the Riga municipality provides assistance for energy efficiency measures in residential homes 80% co-financing on energy audits (142 (102 audits already made) - Technical documentation such as forms for energy audits, technical surveys, technical renovation projects were developed (total 12 common forms); REA is initiating the group of 3 energy auditors with aim to ensure actual energy performance indicators to reduce energy consumption to the extent possible From 2014 free municipal monthly newspaper about opportunities to increase energy efficiency is published Municipal Ltd. Rīgas namu pārvaldnieks (4300 buildings) offers renovation services as ESCO. Signficantly is reduced property tax for buildings which renovation works are already commisioned.

41 ESCO and EPC operational scheme

42 Revolving fund implementation in the city is under development

43 Public building sector of Riga municipality owned buildings and energy efficiency key figures before refurbishment.

44 Energy efficiency measures in public sector (1) There are more than 400 municipal building in Riga including 136 schools and 159 kindergartens In schools and 46 kindergartens were renovated, that is 36% from total number of educational institution buildings. It is aimed to finish mentioned sector s renovation in 5 years.

45 Energy efficiency measures in public sector (2) There are unique cultural institution buildings Opera House, City s theatre, etc.), sport complexes, governmental and public buildings in Riga. Renovation and modernization were partially implemented also in this segment (Russian Drama Theatre, cultural center Ziemelblazma, National museum and others).

46 Energy efficiency measures in public sector (3) Riga municipality eliminated coal boiler houses and installed heating with geothermal pumps equipment in two pre-schools buildings: PII Kastanītis Bišumuižā thermoprobes in the 10 boreholes with depth of 120m. Two-stage heat pump 57,5 kw

47 Energy efficiency measures in public sector (3) Kindergartner Mežaparkā - 12 boreholes with thernoprobes 80m; Two 29 kw heat pumps

48 Public negotiations on nzeb standards

49 Energy efficiency improvement potential is still huge in all of the main energy chain sectors: industry, transport, power production, buildings (Source: )

50 Innovative Smart City projects with integrated ICT solutions (included in REA project e-catalogue) 16) Smart distance controllers for electricity supply data gathering 1) Energy consumption management in multi apartment buildings 2) Energy consumption management in public buildings 3) Local biogas cogeneration with heating in greenhouse complex 4) Programmed LED city lightning with distance control function 5) Heat recovery from the flue gases within district heating system plants 6) Automated energy consumption distance data mining within district heating system 7) E-ticket system implementation and reduced price tickets available for different social groups using public transport 8) Database for Riga living households 9) Thermal pump with heat controllers for efficient building heating 10) Automated wood chips biomass boilers with output value over 100% 11) Electric cars for municipal technical units 12) Sun battery system on building roofs over the city 13) Energy Efficiency for household using Smart technologies 14) Solar pumps for building heating 15) Heat recover from waste water in multi apartment houses

51 Thank you! Brīvības 49/53 Riga, LV-1010, Latvia