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