[EN26] Energy losses in transformation and distribution
Key message
In Slovenia, final users have at their disposal only around 70 % of primary energy. The efficiency of electricity and heat production mostly influences this share.
Definition
The indicator Energy losses in energy conversion and transfer distributes the energy consumption in Slovenia (primary energy) to losses in electricity and heat production (dependent on the production efficiency = consumed energy (fuels) – produced energy (electricity, heat, oil products)), to losses in transfer and distribution, to consumption in the energy sector (in SORS data, this includes the categories Own consumption and Energy sector) and to final energy consumption (non-energy and energy consumption).
Furthermore, the indicator shows the impact of individual fuels on CO2 emissions.
The indicator can be shown in relative (share of individual fuels in total energy consumption) or absolute units. For the indication in absolute units, the thousand tonnes of oil equivalent (ktoe) is used.
Charts
Statistical Office of the RS, 2012; Jožef Stefan Institute, 2012.
| 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Loss in transformation | % | 26.78 | 27.02 | 28.19 | 25.91 | 25.89 | 26.24 | 25.75 | 26.5 | 26.26 | 26.6 |
| Consumption in transformation and in energy sector | % | 1.46 | 1.48 | 1.47 | 1.49 | 1.5 | 1.44 | 1.49 | 1.5 | 1.46 | 1.57 |
| Loss in grids | % | 1.44 | 1.26 | 1.29 | 1.57 | 1.51 | 1.69 | 1.5 | 1.51 | 1.32 | 1.53 |
| Final energy consumption | % | 70.31 | 70.24 | 69.06 | 71.03 | 71.1 | 70.63 | 71.26 | 70.49 | 70.95 | 70.3 |
| 2010 | 2011 | ||||||||||
| Loss in transformation | % | 25.78 | 27.35 | ||||||||
| Consumption in transformation and in energy sector | % | 1.65 | 1.6 | ||||||||
| Loss in grids | % | 1.68 | 1.47 | ||||||||
| Final energy consumption | % | 70.9 | 69.59 |
Statistical Office of the Republic of Slovenia, 2012; Jožef Stefan Institute, 2012
| Transformation losses | Consumption in transformation and energy sector | Distribution losses | Non energy consumptino | Industry | Transport | Households | Other sectors | ||
|---|---|---|---|---|---|---|---|---|---|
| Share in gross inland consumption | [%] | 27.35 | 1.6 | 1.47 | 0.61 | 17.21 | 27.69 | 16.36 | 7.7 |
Slovenian Environment Agency, 2012.
| Solid fuels | Oil products | Natural gas | Renewable sources | Waste | ||
|---|---|---|---|---|---|---|
| Emission factors CO2 | [t/TJ] | 101.56 | 73.49 | 55.02 | 0 | 73.3 |
Slovenian Environment Agency, 2012.
| Solid fuels | Oil products | Natural gas | Renewable sources | Waste | ||
|---|---|---|---|---|---|---|
| Shares of individual fuels in consumption of thermal power plants | % | 86.83 | 0.47 | 9.06 | 3.32 | 0.32 |
| Shares of individual fuels in emissions from thermal power plants | % | 94.07 | 0.37 | 5.31 | 0 | 0.25 |
Goals
- decrease of energy losses in conversion and transfer;
- improvement of efficiency of energy consumption and decrease of the impact of consumption on the environment.
Methodology
Data for Slovenia:
Objectives summarised by: Resolucija o Nacionalnem energetskem programu (ReNEP) (Resolution on the National Energy Programme, Official Gazette of the RS, No. 57/04).
Source database or source: SI-STAT Data Portal > Environment and natural resources > Energy > Energy balance and energy indicators. A joint questionnaire, which is communicated by SORS to EUROSTAT annually, for data on the own consumption of heating plants.
Data administrator: Statistical office of the Republic of Slovenia.
Date of acquisition for this indicator: 11 November 2012.
Methodology and frequency of data collection: The data were prepared on an annual basis. For the previous year, the data are available at the end of the current year.
Data processing methodology:
The calculation of individual contributions:
- Losses in conversion: The consumption of fuels in electricity and heat production from energy balance and in refineries (transformation-total) – electricity and heat production and the production of oil derivatives (transformation total).
- Own consumption in electricity and heat production (electricity – difference between gross production and net production, heat – joint questionnaire).
- Energy consumption in the energy sector (Energy balance of SORS – Energy sector).
The annual growth for the indicator is sometimes shown in percentage points. A percentage point is a unit used for the comparison of different rates of growth. A percentage point includes an absolute comparison calculated by the formula (nthis year)-(nlast year)=16 %–15 %=1 pp (for instance: if last year the growth was 15 % and this year 16 %, then this year the growth was higher by 1 percentage point). The difference in growth can also be expressed in a relative comparison using the formula [(nthis year/nlast year)*100]–100=[(16 %/15 %)*100]–100=6.7 %, where the growth is indicated in percentages.
Information concerning data quality:
- Advantages and disadvantages of the indicator: The source of the basic information is one institution (SORS, EUROSTAT) for the entire time series. This provides a more qualitative analysis of events in the considered period.
- Relevance, accuracy, robustness, uncertainty:
Reliability of the indicator (archive data): The data have the same reliability as the balance of energy consumption – see indicator Final energy consumption by sectors.
Uncertainty of the indicator (scenarios/projections): Scenarios and projections are not available.
- Overall assessment (1 = no major comments, 2 = data to be considered with reservation):
Relevance: 1
Accuracy: 1
Completeness over time: 1
Completeness over space: 1
Other sources and literature:
- EEA, 2012. Energy efficiency in transformation (ENER 011)