Vilniaus energija

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European Economic and Social CommitteeSustainable Development Observatory

UAB Vilniaus Energija, Biomass unit in Vilnius CHP-2

Raimondas Valentinas STIGA Projects performance director

Impact Study of the EU Renewable Energy DirectiveStudy Visit Lithuania: Vilnius, 15 May 2014

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Vilniaus energijaKlausiate - atsakome

22/04/23 Vilniaus energija

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The beginning

• Established in 1998.• The first contract was signed in October of 1999 (700 thousand EUR). After that fast increase.• Heat production and supply.

•Heat:– 65 299 flats– 2.016 administrative, commercial, industrial objects;– 58 381 bills per month.

• Established in January of 2002.• Activity began in April of 2002.• Company reorganization and optimization.

• Heat:– 200 000 flats– 7833 administrative, commercial, industrial objects;– 183 000 bills per month.

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Dalkia in Lithuania

Sargėnai(Kaunas)

Palanga

Telšiai Biržai

Kelmė

Kazlų Rūda

Vilkaviškis

Marijampolė

DruskininkaiAlytus

Litesko 1042 MW (heating) 17 MW (electricity)

Vilniaus energija 2041,75 MW (heating) 388,8 MW (electricity)

- 11 cities- About 41 percent of Lithuanian heat sector- More than 700 000 residents- Annual turnover- 281 M EUR.- 1421 employees- Production of heat- 3,8 TWh/y-Production of electricity- 1,1TWh/y- 1048 km of heat network

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Consumption of biomass

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Vilnius72 MW 16,8 MW el

499,320 GWh 102,898 GWh el

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GWh th - heat production of biomass per yearGWh el - electricity production of biomass per year

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CHP3

BH8

CHP2

604 MW th360 MW el

932 MW th28,8 MW el 40,75 MW th

465 MW th

BH 7

An Example of Integrated Management: Vilnius District Heating Systems15 Year Concession Agreement signed with Dalkia in 2002

CHP- combined heat and power plant;BH- boiler-house.

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Electric capacity – 28,8 MW.Heat capacity – 932MW.

Vilnius Combined Heat and Power Plant No. 2 (E-2)

Third largest power plant in terms of electric capacity in Lithuania (following the Power Plant of Lithuania and Kruonis Pumped Storage Power Plant).Electric capacity in cogeneration mode – 360 MW.Heat capacity – 604 MW.

Vilnius Combined Heat and Power Plant No. 3 (E-3)

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Regardless of inflation during the period (~ 30 percent), fixed price hasn't changed a lot.This was made mostly because of investments and good management which increased effectiveness of company. Unfortunately we have no influence to increasing gas prices.

Investments

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Activity Obligation under the contract until 2017

M EUR

Investment amount M EUR

2002 - 2014

Implementation of information technologies 4,3 4,0

Modernization of combined heat and power stations 57,1 58,6

Modernization of regional boiler houses 2,6 5,5

Renovation of DH network and Connection of new customers 64,0 55,3

Installation of individual building substations with modern heatexchangers and automatic equipments(decommissioning of uneconomic group substations)

31,3 35,5

Investmens

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Activity Obligation under the contract until 2017

M EUR

Investment amount M EUR

2002 - 2014

Application of pump stations to the variable flow in the district heating network

3,5 2,6

Other investments 4,8 4,79

TOTAL M EUR 167,8 166,3

Fuel tank

Primary airAsh removal system

BFB

ESP

Chimney

Sand tank

Flue gas condenser and WESP

AMS

Boiler after reconstruction

Boiler parametersFuel Wood chips, peat, straw

Boiler type BKZ-75-39 reconstructed it to (BFB type)

Starting year 1951 peat / 1961-1971 natural gas and heavy oil/ 2006 biofuel

Fuel consumption (average) 90 m3/h

Capacity 60 MW

Steam capacity 75 t/h

Steam temperature 430 oC

Steam pressure 39 bar

CO (recalculated 6% O2) ≤250 mg/Nm3

Hard particle (recalculated 6% O2) after ESP

≤50 mg/Nm3

NOx (recalculated 6% O2) ≤400 mg/Nm3

Sand temperature 850 oC

Efficiency (guarantee tets ) 87 %

T-4 turbine

Gas boiler

nr5

40 bar(a) collector

Biofuelboiler

nr4

Gas boiler

nr3

1,2 bar(a) header

12 MWe 12 MWe

New T-5 turbine

16,67MWe

T-3 turbine

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No. Parameters Unit Value

1 Electrical capacity MWe 16,67

2 Voltage kV 6.3±10℅

3 Heat output MWth 53,3

4 Live steam pressure bar 40

5 Live steam temperature oC 440

6 Turbine net efficiency % 95.7

7 Revolutions per minute turbine/generator rpm 8120/1500

8 Live steam flow t/h 78

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Turbine MAN Turbo AG MARC 4 – C01

From boiler <200 mg/Nm3~180-200°C

To chimney1-5 mg/nm3~50-55°C

To WH boilers~50-60°C

From heating network~40-45 °C

Clean condensate to electric magnet

Flue gases condenser

Flue gases economaizer

ID fans Water separator

WESP

Water treatment modul

(capacity 12-18 MW, depends on fuel moisture, water temperature, flue gases temperature)

FGC - for recover heat from flue gas and for reducing CO2 emissions

By using of FGC bio mass boilers efficiency increased 20-25%, that lets return approximately 102.4 GWh annual heat energy( and that is about 3% of heat energy which is produced in E-2 and E-3 power plants)

FGC reduces natural gas costs, have a long operation period (~20 years) and have a low operational cost

Good payback

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Flue gases condenser

The Vilnius CHP-2 biomass unit projects:• Start of BFB boiler installation - June 2005:- Retrofit a 1953 existing boiler (Thermal capacity - 60 MW, from it 12 MWel). Installation

of a bubbling fluidized bed, construction of fuel handling system and electrostatic filter and etc.;

- Beginning of operation: October 2006. Annual output: 420 GWh (heat) and 64.8 GWh (electricity);

- Fuel: from 200 to 220 th. t. of wood biomass (70% also 10% of straw from it) and peat 30%);

- Gas consumption by Vilniaus Energija reduced by 8%, CO2 emissions cut by 96 000 t. per year;

- Investments - 11 700 k€.• Installation of new 16,7 MWe turbine instead of old one 12 MWe, output of electricity

increased by 33,1 GWh:- Investments - 7 183 k€.• Flue gas condenser started to operate in April 2010:- 54 ,1 GWh/year flue gas heat recovery, CO2 cut by 12 000 t.;- Investments - 7 860 k€.

Total – 26 743 k€.

VILNIUS CHP-2 BIOMASS UNIT PROJECT

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Thank You for Attention

22/04/23 Vilniaus energija