woc 5 - utilization sg 5.1 industrial...
TRANSCRIPT
WOC 5 - Utilization SG 5.1 Industrial Utilization
Case study:
Efficient use of CHP for process & heating in industry in Italy
Egidio Adamoeni gas & power - Italy
Buenos Aires6th October 2009
Agenda - Items
Introduction
Case study in textile sector
Conclusions3
2
1
Cogeneration is the simultaneous generation of electrical and thermal energy in the same process, both considered useful products
Introduction
Example of CHP plant lay out
HOT WATER
GAS
EXHAUST
ENGINE
STEAM
POWER
Less energy wasting in production
Less losses in power transmission
Reduction of emissions
Main benefits of CHP
CHP is mainly suitable if there is a simultaneous demand of power & heat
To evaluate effectiveness of CHP with respect to separate production
Suitability conditions Feasibility study
Suitability and feasibility
Paper mills
In Industry, CHP is particularly suitable in these sectors:
Industrial sectors
Food Brick and ceramicsChemical Textile
Introduction
In many Countries, “high efficiency CHP” is defined by law
Grid Operators
Authority
ESCos
In Italy “high efficiency CHP” is eligible to White Certificates System, a mechanism to incentive energy efficiency
PES ≥
10% (size > 1 MWe)
In European Union (EU Directive 2004/8/EC) starting from 2011, minimum Primary Energy Saving is required
• smooth administrative processes • reduction of CAPEX• incentives to recover external costs of energy market• information & culture
Development of CHP needs also:
Introduction
Case study
Natural gas CHP in textile industry
COTONIFICIO ALBINI S.p.A.Lombardia - ITALY
PROCESS: Cotton dyeing and weaving factory located in Albino
Electricity
Heat
Working program~ 6,500 h/y
12.5 GWh/y
11.1 GWh/y
ENERGY
DEMAND
PROCESS
• Dyeing
• Preparation
• Weaving
• Quality controls
dryingvaporizationsizing
Previous good experience
A 1.8 MWe CHP plant – 3 engines – was already installed, to be substituted because of obsolescence of engines
Case study:Industrial process
Choice of kind and size of CHP
22 internal combustion engines1.7 MWe total
Energy audit1
Energia elettrica consumata
0.00
500.00
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Energiaelettricaconsumata
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gen-
00m
ar-0
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ag-0
0lug
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set-0
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ar-0
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set-0
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ar-0
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set-0
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set-0
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5lug
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Termico caldaia Termico cogeneratore Termico totalemedia mobile totale media mobile cogenerazione media mobile caldaia
~ 1.8 MWe
~ 2.0 MWt
Case study:Feasibility study
Profits estimation vs. separate production
3
Saving of Primary Energy 25 % *
Economic saving (including O&M costs)
270,000 €/y
* according to Italian regulation
Case study:Main actions
• 2 internal combustionNatural Gas engines: 1/1 heat/power ratio cheaper than GT
1 new engine: 1 MWe
1 existing engine: 0,7 MWe
POWER
Optimization of power generation and heat recovery
• Optimization of plant efficiency & flexibility• Preservation of high quality of productsRESULTS
HEAT
• Direct use of hot water instead of steam
• Hot water storage tank with closed loop
• Low pressure steam (instead of 11 barg)
65 °C, 95 °C
200 m3
4 barg
Case study:Some images…
HOT WATER
N. GAS
EXHAUST
ENGINE
STEAM
POWER
Images of the new 1 MW Engine & Steam Generator
Case study:Saving
N O
CHP 1
90%
815
741%6
9
POWERPRIMARY ENERGYGWh HEAT
CHP
316
6 7
Th. Eff.
42%El. Eff.
38%
3Saving of energy: 30 % *
Efficient
CO2 avoided: 1.8 kt/y **Clean
***compared to separate production
Saving: ~300,000 €/y***~ 20 %
** referred to: 575 tCO2 /GWhe and 2.35 tCO2 /Toe NG
* referred to Italian regulation
Pay back time ~ 4 y
Cost effective
Data are for reference purpose only
13 57 11
FACTORY
Conclusions
District heating Industry
Energy saving
Reducing CO2 emissions
Reducing cost of energy supply
Energy efficiency is a “virtual” energy source, leading to reduction of greenhouse gas emission and stimulation of technology research
CHP can play an important role in:
Good fields of development are:
eni is committed to promoting energy saving behaviourand offers consultancy services aimed at promoting energy efficiency and CHP among industrial clients
Italian firm Cotonificio Albini SpA for information & data on industrial CHP case study
WOC 5 - SG 5.1 Chairman, Vice Chairman & all the members for their cooperation
Thank you for your attention!
Egidio Adamoeni gas & power - Italy
Phone: +39 02 520 51627E-mail: [email protected]