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Conférence européenne des régions pour le Climat. Energy efficiency in Heat + Electricity co-generation: the Lombardy’s best practices. Yves Gaspar Lombardy Foundation for the Environment Catholic University of Brescia. Lyon, 20 Octobre 2011. Energy use efficiency:

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conf rence europ enne des r gions pour le climat
Conférence européenne des régions pour le Climat

Energy efficiency in Heat + Electricity co-generation:

the Lombardy’s best practices

Yves Gaspar

Lombardy Foundation for the Environment

Catholic University of Brescia

Lyon, 20 Octobre 2011

s carnot 1796 1832

Energy use efficiency:

Performance of thermal engines

S. Carnot 1796-1832
slide3

η

The heat engines

QH

QH = QC + W

W

QC

district heating in eu present situation1

District heating is a convenient way to heating space and tap water.

In many processes, for example when electricity is generated or waste is burned, large parts of the energy are set free in the form of surplus heat.

The fundamental idea behind modern district heating is to recycle this surplus heat which otherwise would be wasted- from electricity production, from fuel and biofuel-refining, and from different industrial processes.

Furthermore, district heating can make use of the many kinds of renewables (biomass, geothermal, solar thermal).

DH has an average market share of 10 percent in Europe, but it is particularly widespread in North, Central and Eastern Europe, where market shares often reach 50 percent and more.

District Heating in EU – Present Situation
district heating in eu present situation2
District Heating in EU – Present Situation
  • At present 69% of the primary energy demand in EU is originated in urban areas, where the DH benefits are higher.
  • More than 83% of heat delivered by DH systems is originated by “surplus heat”, CHP and renewable energies. DH contibutes to the reduction of primary energy demand and CO2 emissions in EU.
  • At present DH in the EU saves 0,9 EJ/year of primary energy and avoids 113 Mt/year of CO2 emission
  • Ecoheatcool project, co-financed by the European Commission, confirms the possibility of saving an extra 400 Mton/year of CO2 (corresponding to 9.3% CO2 reduction, more than the whole Kyoto target) and an extra 2,1 EJ/year of primary energy (equivalent to the annual energy balance of Sweden) with more District Heating and Cooling across 32 European countries.
slide8

BRESCIA

Municipality of Brescia

Province of Brescia

slide9

BRESCIA DISTRICT HEATING – EXISTING SITUATION

C.le Nord

1 km

40 Mm3 heated volume

620 km of double pipe

19.500 connected buildings

130.000 inhabitants supplied

695 MWt of installed power

223 MWe of electrical installed power (CHP)

C.le Lamarmora

Termoutilizzatore

slide11

BRESCIA DISTRICT HEATING

2008 OPERATIONAL DATA

Heat supplied by district heating:

at customer boundaries: 1.053 GWht

at power plant boundaries: 1.292 GWht

Cogenerated electricity: 857 GWhe

Maximum heat produced

(5 gennaio 2009): 560 MWt

slide13

100 %

650 kWh

1000 kg

~ 60 %

1000 kWh

TERMOUTILIZZATORE BRESCIA- Integrated Waste Management

slide15

TERMOUTILIZZATORE

(The waste to energy plant of Brescia)

slide17

TERMOUTILIZZATORE

(The waste to energy plant of Brescia)

OPERATIONS DATA 2008:

Treated waste

( of which biomass 274.000 tons )

Electricity production (net)

District heating

Fossil fuels saving (Tons of Oil Equivalent)

CO2 avoided emissions

801.000 tons

570 Gwhel

568 Gwhth

> 150.000 TOE

> 400.000 tons

brescia dh developments nox reduction
Brescia DH developments: NOx Reduction

IMPLEMENTED NOx CONTROL IN BRESCIA WTE

(since 1998)

  • PRIMARY
    • low combustion excess air
    • 30 compartment grate
    • infrared camera for

optimization of air supply

    • flue gas recirculation
  • SECONDARY (NOx reduction)
    • SNCR (NH3 injection with 27 nozzles, positioned at

three levels)

slide19

TERMOUTILIZZATORE

(The waste to energy plant of Brescia)

STACK EMISSIONS

slide20

STUDIO DI DISPERSIONE ATMOSFERICA

DI INQUINANTI EMESSI SUL TERRITORIO BRESCANO

Comune di Brescia – Università degli Studi di Brescia

Fig 47 – Riduzione della media annuale di PM10(µg/m3) conseguente all’introduzione

del teleriscaldamento

slide21

BRESCIA DISTRICT HEATING FUTURE developmentS

- SCENARIO 2020 -

HEATED VOLUME: 45 Mm3

MAXIMUM PEAK OF HEAT REQUIRED: 720 MWt

ANNUAL THERMAL ENERGY REQUIRED: 1.791 GWht

slide22

Brescia DH developments: NOx Reduction

HIGH DUST SCR

HIGH DUST SCR LOCATION

slide23

Brescia DH developments: NOx Reduction

SCR “HIGH DUST”

2nd PHASE TEST RESULTS (preliminary)

2 SCR LAYER (24 months operation):

  • NOx: 80  60 mg/Nm3
  • NH3 slip: 12  1 - 4 mg/Nm3
  • NH3 consumption: 0.22  0.20 m3/h (25% concentrated)
  • PRESSURE LOSS: < 2 m bar
slide24

Brescia DH developments: NOx Reduction

SCR HIGH DUST ON THE COAL BOILER OF LAMARMORA PLANT

  • BOILER THERMAL POWER: 200 MW
  • FLUE GAS FLOW: 230 KNm3/h
  • NOX EMISSION: 500 mg/Nm3

EXPECTED NOx EMISSION AFTER DENOX INSTALLATION: < 150 mg/Nm3

slide25

MILANO DISTRICT HEATING

UPDATED 31/12/2008

19,8 Mm3 heated volume

143 km of double pipe

1.240 connected buildings

200.000 inhabitants supplied

639 MWt of installed power

80 MWe of electrical installed power (CHP)

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