1. No category

European Economic and Social Committee
Sustainable Development Observatory
UAB Vilniaus Energija,
Biomass unit in Vilnius CHP-2
Raimondas Valentinas STIGA
Projects performance director
Impact Study of the EU Renewable Energy Directive
Study Visit Lithuania:
Vilnius, 15 May 2014
11/01/2017
)
Vilniaus energija
Klausiate - atsakome
)
11/01/2017 Vilniaus energija
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.
11/01/2017
• 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.
3
Dalkia in Lithuania
Biržai
Telšiai
Litesko
1042 MW (heating)
17 MW (electricity)
Palanga
Vilniaus energija
2041,75 MW (heating)
388,8 MW (electricity)
Kelmė
Sargėnai
(Kaunas)
- 11 cities
Kazlų Rūda
Vilkaviškis
Marijampolė
Vilnius
Alytus
11/01/2017
Druskininkai
- 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
4
Consumption of biomass
Telsiai
5 MW
35,552 GWh
Palanga
6,4 MW
44,350 GWh
Birzai
8 MW
28,984 GWh
Kelme
5 MW
24,371 GWh
Kybartai
1,5 MW
7,592 GWh
Kazlu Ruda
3 MW
14,686 GWh
Vilkaviskis
2,5 MW
27,053 GWh
Vilnius
72 MW 16,8 MW el
499,320 GWh 102,898 GWh el
Marijampole
16 MW 2,5MW el
123,437 GWh 11,383 GWh el
Druskininkai
12,19 MW
69,179 GWh
Alytus
20,2 MW 5,4 MW el
112,706 GWh 47,796 GWh el
GWh th - heat production of biomass per year
GWh el - electricity production of biomass per year
11/01/2017
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An Example of Integrated Management: Vilnius District Heating Systems
15 Year Concession Agreement signed with Dalkia in 2002
BH8
465 MW th
604 MW th
360 MW el
CHP3
CHP2
932 MW th
28,8 MW el
40,75 MW th
BH 7
CHP- combined heat and power plant;
BH- boiler-house.
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6
Vilnius Combined Heat and
Power Plant No. 2 (E-2)
Electric capacity – 28,8 MW.
Heat capacity – 932MW.
Vilnius Combined Heat and
Power Plant No. 3 (E-3)
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.
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.
11/01/2017
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Investments
Activity
Obligation under the contract
until 2017
Investment amount M EUR
2002 - 2014
M EUR
Implementation of information
technologies
4,3
4,0
57,1
58,6
2,6
5,5
Renovation of DH network and
Connection of new customers
64,0
55,3
Installation of individual building
substations with modern heat
exchangers and automatic equipments
(decommissioning of uneconomic
group substations)
31,3
35,5
Modernization of combined heat and
power stations
Modernization of regional boiler
houses
11/01/2017
Investmens
Obligation under the contract
until 2017
Activity
Investment amount M EUR
2002 - 2014
M EUR
Application of pump stations to the
variable flow in the district heating
network
3,5
2,6
Other investments
4,8
4,79
167,8
166,3
TOTAL M EUR
11/01/2017
Footer
11
Boiler after reconstruction
Chimney
Sand tank
Fuel tank
AMS
ESP
Primary air
Ash removal system
BFB
Flue gas
condenser and
WESP
Boiler parameters
Fuel
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 %
Gas
boiler
nr3
Biofuel
boiler
nr4
Gas
boiler
nr5
40 bar(a) collector
1,2 bar(a) header
New T-5 turbine
T-3 turbine
16,67MWe
T-4 turbine
12 MWe
12 MWe
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Turbine MAN Turbo AG MARC 4 – C01
No.
Parameters
Unit
MWe
Value
1
Electrical capacity
2
Voltage
3
Heat output
4
Live steam pressure
bar
40
5
Live steam temperature
oC
440
6
Turbine net efficiency
%
95.7
7
Revolutions per minute turbine/generator
8
Live steam flow
kV
MWth
rpm
t/h
16,67
6.3±10℅
53,3
8120/1500
78
15
Flue gases condenser
(capacity 12-18 MW, depends on fuel moisture, water temperature, flue gases
temperature)
To chimney1-5 mg/nm3
~50-55°C
ID fans
From boiler <200 mg/Nm3
~180-200°C
Water separator
WESP
Flue gases economaizer
Water treatment modul
To WH boilers~50-60°C
From heating network
~40-45 °C
Clean condensate to electric magnet
Flue gases condenser
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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VILNIUS CHP-2 BIOMASS UNIT PROJECT
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€.
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Thank You for Attention
)
11/01/2017 Vilniaus energija