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Empowered consumer in the energy marketCONFERENCE, Riga, 21.05.2015
RES use in the Riga city
Juris Golunovs, Head of Energy Efficiency Information Centre of Riga Energy Agency
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.
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
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
Decision maker
• Mayor of Riga to sign Covenant of Mayors
• Riga City Council
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
Calculated CO2 emissions in Riga 1990 -2008
0,0
500,0
1000,0
1500,0
2000,0
2500,0
3000,0
3500,0
4000,0
4500,0
5000,0
1990 1995 2000 2005 2008
thous t
Transport
Final fuel consumption
Electricity consumption
DH consumption
Projected CO2 emissions in Riga for different scenarios
1500
2000
2500
3000
3500
4000
4500
1990 1995 2000 2005 2008 2010 2015 2020
thous t CO2
referencescenario
Scenario Min
Scenario Opt
Scenario Max
.
Name, Institution – 16 June 2009 – 7
CITY
Materials
Products
FoodEnergy
Waste
Water
CITY
.
Name, Institution – 16 June 2009 – 8
CITY
Electricity
Hydro
Geothermal
Solar
Transport
Energy
Biomass
Heat
Wind
CITY
Renewable energy solutions for city
RES use in Riga:
• hydroenergy – Riga HES (Daugava cascade) connectioned to the power supply system of Riga
• biogas
• solid biomass
• subsurface ground heat
• solar energy
• electric cars
B I O G A S
Biogas Cogeneration (CHP) plants:
◙ Sewage treatment plant “Daugavgrīva”
(LtD “Rigens”) – 2,1 MWel.; 2,6 MWth;
◙ LtD “Getliņi EKO” solid communal waste treatment plant – 5,3 MWel.; 6,8 MWth.
Heat to be used in the greenhouses farm.
Biomass use dynamics in the JSC “Rigas siltums”
Ground thermal resourcesGround thermal resources
SUBSURFACE GROUND HEAT
Riga municipality installed space heating based on the ground heat
pumps in the two kindergardens, thereby closed the two coal-fired
boiler houses:
Kindergarden “Kastanītis” –
10 thermal probes in vertical
boreholes with depth –
120m;
Two stage heat pump 57,5
kW
Riga municipality eliminated coal boiler houses and installed heating
with geothermal pumps equipment in two pre-schools buildings:
Kindergartenn Mežaparkā -
12 boreholes with thermoprobes – 80m;
Two 29 kW heat pumps
SOLAR ENERGY
0
50
100
150
200
250
Jan
Feb Mar A
pr
Maijs
Jūn
Jūl
Aug
Sep O
ktDec
Berlīne
Helsinki
Stokholma
Kopenhāgena
Rīga
Global monthly solar radiation on horizontal surface in nordic cities of Europe
(kWh/m²):
Most important solar plant in Riga was installed in the hazardous
waste treatment company “Zaļā Latvija” LtD - with the annual
designed capacity 1500 kWh
Energy balance example for Riga
multi-apartment building
Total annual energy demand for space
heating & hot water preparation = 231
kWh/(m²a)
(LUWOGE consult)
Annual energy demand for space
heating = 144,29 kWh/(m²a)
Energy storage options – posibilities to balance
energy production & demand
Hydrogen energy system: from water to water
Fuel cells and hydrogen
can provide a complete
zero-emission
(decentralised) power
generation-pathway
BAU technical solutions
not later than in 2030
Energy storage – key component in sustainable
energy system (*)
.
Storage possibilities for renewable energy
. •Electricity (supercapacitors)
•Hydro storage energy (hydropower, pumped
storage power plants
•Mechanical energy (compressed air reservoirs,
flywheel energy storage systems)
•Electrochemical energy (batteries)
•Chemical energy (fuels)
Development of hydrogen technologies
depends on oil price
Alex Körner
IEA Infrastructure analyses
© OECD/IEA 2012
How fare are H2 aplications for city?
Letter of intent for the development and
usage of hydrogen fuel cell trolleys in
Riga was signed on October of 2014
The enterprise "Rīgas Satiksme" as the
operator of public transport in Riga,
"Ballard Power Systems" and the
leading Czech trolleybus and tram
manufacturer "Skoda Electrics"
("Škoda") agreed that, in accordance
with the "Hy-Trolley" program "Skoda"
and "Ballard" plans by 2016 to replace
part of the Riga trolleybus traction
power-generating backup diesel
generators with a new generation of
fuel cell modules from "Ballard"
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
16) Smart distance controllers for electricity supply data gathering
Innovative Smart City projects with integrated ICT solutions (included in REA project e-catalogue)
Thank you for your kind attention!
http://www.rea.riga.lv