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Indicator Assessment
The efficiency of electricity and heat production from conventional thermal power plants improved between 1990 and 2009 by 5.5 percentage points (from 45.4% in 1990 to 50.9% in 2009). Between 1990 and 2005, the improvement was even greater at 7.0 percentage points (from 45.4% in 1990 to 52.4% in 2005). The improvement until 2005 was due to the closure of old inefficient plants, improvements in existing technologies, often combined with a switch from coal power plants to more efficient combined cycle gas-turbines. Between 2005 and 2009, there was a decline in efficiency of electricity and heat production from conventional thermal power plants of 1.5 percentage points (from 52.4% in 2005 to 50.9% in 2009) because of lower heat production.
Efficiency of conventional thermal electricity and heat production
Note: Output from conventional thermal power stations consists of gross electricity generation and also of any heat sold to third parties (combined heat and power plants) by conventional thermal public utility power stations as well as autoproducer thermal power stations. The figure on the left is including district heat and the figure on the right is excluding district heat. Left figure: Efficiency of conventional thermal electricity and heat production (including district heat). Right figure: Efficiency of conventional thermal electricity and heat production (excluding district heat)
Eurostat 2010 (historical data), http://epp.eurostat.ec.europa.eu/portal/page/portal/energy/data/database
Output from public thermal power stations - Supply, transformation, consumption:
Efficiency (electricity and heat) production from conventional thermal plants, 1990, 2009
Note: The EEA efficiencies exclude Iceland (and Croatia) (for conventional) and Iceland and Norway (and Croatia) (for public conventional). Iceland is missing because there is no data in Eurostat this year. Croatia was included last year but has been excluded because it is not part of EEA32. For Norway its efficiency is above 100% in 1990 because the electricity consumed for heating is not considered as an input, although the heating from electric boilers is considered in total output. Swedish conventional and public conventional efficiencies are above 100% in some years (when including district heating), but not in 1990 or in 2009, so Sweden is included in the charts.
Eurostat 2010 (historical data), http://epp.eurostat.ec.europa.eu/portal/page/portal/energy/data/database
Output from public thermal power stations - Supply, transformation, consumption:
Efficiency (electricity and heat) from public conventional thermal plants, 1990, 2009
Note: The EEA efficiencies exclude Iceland (and Croatia) (for conventional) and Iceland and Norway (and Croatia) (for public conventional). Iceland is missing because there is no data in Eurostat this year. Croatia was included last year but has been excluded because it is not part of EEA32. For Norway its efficiency is above 100% in 1990 because the electricity consumed for heating is not considered as an input, although the heating from electric boilers is considered in total output. Swedish conventional and public conventional efficiencies are above 100% in some years (when including district heating), but not in 1990 or in 2009, so Sweden is included in the charts.
Eurostat 2010 (historical data), http://epp.eurostat.ec.europa.eu/portal/page/portal/energy/data/database
Output from public thermal power stations - Supply, transformation, consumption:
Efficiency (electricity and heat) from autoproducers conventional thermal plants, 1990, 2009
Note: Due to inconsistencies in the Eurostat data set Bulgaria, Greece, Lithunia, and Slovenia are excluded for all years (efficiencies >100%). For Cyprus, Iceland and Malta data on autoproducers is not available, therefore they are also excluded for all years. Croatia is excluded because it is not part of EEA32.
Eurostat 2010 (historical data), http://epp.eurostat.ec.europa.eu/portal/page/portal/energy/data/database
Output from public thermal power stations - Supply, transformation, consumption:
[1] Specific details of emission levels from electricity generating plants can be obtained for a variety of pollutants at the European Pollutant Emission Register.
Output from conventional thermal power stations consists of gross electricity generation and also of any heat sold to third parties (combined heat and power plants) by conventional thermal public utility power stations as well as autoproducer thermal power stations. The energy efficiency of conventional thermal electricity production (which includes both public plants and autoproducers) is defined as the ratio of electricity and heat production to the energy input as a fuel. Fuels include solid fuels (i.e. coal, lignite and equivalents, oil and other liquid hydrocarbons, gas, thermal renewables (industrial and municipal waste, wood waste, biogas and geothermal energy) and other non-renewable waste.
Units: Fuel input and electrical and heat output are measured in thousand tonnes of oil equivalent (ktoe)
Efficiency is measured as the ratio of fuel output to input (%)
The indicator shows the efficiency of electricity and heat production from conventional thermal plants. A distinction is made between public (i.e. main activity producers), thermal plants and autoproducers. Public thermal plants mainly produce electricity (and heat) for public use. Autoproducers produce electricity (and heat) for private use, for instance in industrial processes.
The efficiency of electricity and heat production is an important factor since losses in transformation account for a substantial part of the primary energy consumption (see ENER 11). Higher efficiency of production therefore results in substantial reductions in primary energy consumption, hence reduction of environmental pressures due to avoided energy production. However, the overall environmental impact has to be seen in the context of the type of fuel (see ENER 27) and the extent to which abatement technologies are used (see ENER 06).
Compliance with environmental legislation (for example the Large Combustion Plant Directive 2001/80/EC, the CARE package, etc) requires the application of a series of abatement technologies (e.g. to reduce SO2 emissions requires retrofitting the plant with flue-gas desulphurisation technology, carbon capture and storage to capture CO2 emissions, etc) increasing the energy consumption of the plant, thus reducing its efficiency. This is why it is important to promote highly efficient generation units, such as IGCC (Integrated Gasification Combined Cycle), which can operate at higher efficiencies.
Council adopted on 6 April 2009 the climate-energy legislative package containing measures to fight climate change and promote renewable energy. This package is designed to achieve the EU's overall environmental target of a 20 % reduction in greenhouse gases and a 20 % share of renewable energy in the EU's total energy consumption by 2020. The climate action and renewable energy (CARE) package includes the following main policy documents:
Communication from the Commission; COM(2008) 771 final. The main objectives of this communication are to report on the current status of the combined heat and power generation (CHP or cogeneration), and to present possibilities for its development.
Detailed guidelines for the implementation and application of Annex II to Directive 2004/8/EC; 2008/952/EC. Guidelines for the calculation of the electricity from high-efficiency cogeneration.
Action Plan for Energy Efficiency: Realising the Potential ( COM(2006) 545).The Commission will develop minimum binding energy efficiency requirements for electricity generation facilities, heating and cooling for facilities operating with less than 20 megawatts of power, and possibly for more powerful facilities too (not published yet).
Directive on the limitation of emissions of certain pollutants into the air from large combustion plants; Directive 2001/80/EC. Aims to control emissions of SOx, NOx and particulate matter from large (>50MW) combustion plants and hence favours the use of higher efficiency CCGT as opposed to coal plants.
No targets have been specified
Average annual rate of growth calculated using: [(last year / base year) ^ (1/number of years) - 1]*100
Efficiency of electricity and heat production = (electrical output + heat output)/fuel input
The coding (used in the Eurostat New Cronos database) and specific components of the indicator are:
Numerator:
Denominator:
Data collected annually.
Eurostat metadata for energy statistics http://epp.eurostat.ec.europa.eu/portal/page/portal/statistics/metadata
Geographical coverage:
The Agency had 32 member countries at the time of writing of this fact sheet. These are the 27 European Union Member States and Turkey, Iceland, Norway, Liechtenstein and Switzerland.
Total: Norway, displays efficiencies higher than 100% for thermal generation due to the extensive use of electric boilers for heat production. In the Eurostat statistics, the heat is included in the output, while the electricity input is not. For power plants the consumption of electricity is attributed to the energy sector while partly may be in fact used as input for heat. For these reasons, Norway was excluded from the calculations
Public: Norway is excluded as the data was considered unreliable, giving efficiencies ≥ 100%. Autoprocucers: Bulgaria, Greece, Lithunia, and Slovenia are excluded as they were considered unreliable, giving efficiencies ≥ 100%. No autoproducers data was available for Cyprus, Iceland and Malta
Temporal coverage: 1990-2009.
No methodology for gap filling has been specified. Probably this info has been added together with indicator calculation.
No methodology references available.
The efficiency of electricity production is calculated as the ratio of electricity output to the total fuel input. However, the input to conventional thermal power plants cannot be disaggregated into separate input for heat and input for electricity production. Therefore the efficiency rate of electricity and heat production equals the ratio of both electricity and heat production to fuel input, which assumes there is an efficiency rate for heat production.
Also, electricity data (unlike that for overall energy consumption) for 1990 refers to the western part of Germany only, so there is a break in the series from 1990-1992.
There are also slight differences in the calculation of efficiencies between the historical and projected data. In contrast to the Eurostat data, the projections take into account non -marketed steam, i.e. steam generated - either in boilers or in CHP plants - and used on site by industrial consumers. The calculation of projected efficiencies therefore takes into account both the non-marketed steam generated in CHP units as well as the corresponding fuel input whereas the calculation of historical efficiencies excludes both these components.
Strengths and weaknesses (at data level)
Data have been traditionally compiled by Eurostat through the annual Joint Questionnaires, shared by Eurostat and the International Energy Agency, following a well established and harmonised methodology. Methodological information on the annual Joint Questionnaires and data compilation can be found in Eurostat's web page for metadata on energy statistics.
http://epp.eurostat.ec.europa.eu/portal/page/portal/statistics/metadata See also information related to the Energy Statistics Regulation http://epp.eurostat.ec.europa.eu/portal/page/portal/energy/introduction
No uncertainty has been specified
For references, please go to https://www.eea.europa.eu/data-and-maps/indicators/efficiency-of-conventional-thermal-electricity-generation/efficiency-of-conventional-thermal-electricity-3 or scan the QR code.
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