Breadcrumbs
Domestic coal is far from providing a baseload in Türkiye
The low capacity factor and availability rate, and frequent production losses due to breakdowns of Türkiye's domestic coal power demonstrate that this source is far from capable of providing a baseload supply.
Available in: Türkçe
Highlights
52%
The available capacity ratio of domestic coal power plants in Türkiye.
22 TWh
Annual generation loss due to malfunctions of coal power plants in Türkiye.
20%
Share of emissions from coal power in Türkiye’s total emissions.
About
This study provides a comparative analysis of Türkiye’s coal-fired power plants by examining their current stock, development and performance in electricity generation. Our data is free and easily downloadable.
Executive summary
Domestic coal fails to provide baseload electricity
In the last decade, electricity generation from coal has doubled, with coal-generated electricity reaching a record high of 118 TWh in 2023, marking the highest production in Türkiye’s history. Additionally, a large portion of Türkiye’s domestic coal reserves has low energy potential and high moisture content, which reduces the performance of the power plants. Consequently, a high amount of coal is consumed per unit of electricity generated, leading to high emissions.
In Türkiye, most of the coal power plants fall short of achieving the performance expected of baseload providers due to their low efficiency, availability, and capacity factor, coupled with frequent breakdowns and irregular production profiles. While Türkiye’s continuous electricity demand is estimated to be around 20 GWh, which is referred to as baseload, domestic coal plants fail to provide the baseload supply as they show low performance in producing electricity. Reducing dependency on coal in electricity generation is crucial for lowering emissions and preventing economic losses. It is imperative for Türkiye to promptly establish a phase-out strategy from coal and accelerate investments in renewable energy to mitigate future economic and environmental burdens.
Bahadir Sercan Gümüş Energy Analyst, Ember
The significant portion of coal power plants held in the system with various supports with the claim of providing baseload is actually far from achieving baseload supply. The ability of solar and wind energy to generate electricity at a lower cost presents an opportunity for Türkiye’s clean energy transition. Türkiye must swiftly establish a strategy to phase out low-performing and expensive coal, focusing particularly on harnessing its substantial potential in solar energy to accelerate the transition to clean energy.
Türkiye moves away from net zero target
The share of coal in electricity generation continues to increase
Türkiye’s electricity generation emissions do not show a downward trend due to the recent rise in coal-fired electricity generation
One of the key performance indicators, energy efficiency in power plants, indicates the proportion of fuel consumed that is converted into electrical energy. Over the last five years, lignite power plants owned by the state-owned company EÜAŞ had an average energy efficiency of 33.9%. Privately operated lignite power plants had an even lower efficiency, calculated at 31.5%. In comparison, the EU average efficiency was 38%. In countries such as Germany and Poland, the average efficiency rates were 39.4% and 40.6% respectively.
Another factor that may affect the performance of the power plants is their age. In Türkiye, the installed capacity of coal-fired power plants aged 30 years and above is 6 GW with a share of 27% of total coal capacity, while there is 8.8 GW installed capacity between 30 and 10 years old and 6 GW installed capacity under 10 years old. The average age of coal-fired power plants in Türkiye is 21 years old.
In Türkiye, the low calorific value of coal, combined with its high ash, sulphur, and moisture content, contributes to the low efficiency of power plants. Additionally, some plants have completed their economic life, which affects the reliability of electricity generation, particularly as expected from a baseload power plant. In fact, a considerable number of coal-fired power plants cannot operate at full capacity. Their available capacity falls far behind the installed capacity. The plants frequently report malfunctions and their hourly production shows high variability. These factors lead to unreliable electricity generation and frequent operational issues, making it difficult for Türkiye to balance demand and supply.
Is coal base load?
Domestic coal plants are the furthest from providing baseload
Domestic coal power plants older than ten years are the farthest from providing baseload power, whereas some wind farms achieved higher capacity factors than domestic coal
Considering all indicators affecting baseload performance together, it is evident that the power plants with the lowest baseload effect are especially the older domestic coal plants. Additionally, the average performance of EÜAŞ plants is significantly below the Turkish lignite average, particularly due to the low calorific value of the coal in the Afşin-Elbistan region. In contrast, the calorific value of coal imported consistently meets commercial agreements, enabling these plants to experience fewer production drops and maintain continuous production.
It has been observed that power plants which are 10 years old or older, frequently experience malfunctions, have low availability rates, operate at low capacities throughout the year, and consequently have a low baseload effect. The age of the plants is considered to play a significant role in their baseload performance. On the other hand, the significantly higher failure-related losses in domestic coal power plants over 10 years old compared to other coal plants indicate that these plants are far from providing continuous electricity supply.
As a result of the investigations, it has been observed that especially domestic coal-fired power plants are far from being suitable for base load supply. These plants also have the highest emission factors in Türkiye due to their use of low calorific value coal and operate at low efficiencies in electricity generation. As for imported coal power plants, they produce high emission levels due to their high electricity generation capacities and also account for an annual payment for imported coal of 3.7 billion USD. In short, these plants increase dependency on imported energy sources for electricity generation and hinder Türkiye’s efforts to reduce emissions. Therefore, it is recommended to replace these inefficient, costly and environmentally damaging coal plants with new renewable energy sources.
Conclusion
Electricity generation policies need to be reviewed
Türkiye has ratified the Paris Climate Agreement and set a net zero target for 2053, yet it lacks a strategy for phasing out coal.
Coal power plants, in particular those burning domestic coal, generate electricity with low efficiency, low availability rate, and low capacity factors. Moreover, these plants frequently experience production drops and losses due to failures, diminishing their reliability. This situation not only jeopardises energy security but also leads to economic losses.
It is evident that renewable energy sources, especially solar and wind energy, are more cost-effective and environmentally friendly compared to coal. Therefore, to achieve Türkiye’s climate targets without delay, it is imperative to prioritise phasing out coal by focusing on plants with the lowest baseload performance first.
In conclusion, defining a coal phase-out strategy and integrating it into energy policies are essential for Türkiye to reach its climate and energy goals while fostering a more competitive energy market economically. This strategy will represent a significant step in the long term towards improving energy security and addressing climate change.
Supporting Material
Methodology
Supporting Materials
For Türkiye’s licensed electricity generation data “/production/real-time-generation” and for unlicensed generation “/production/renewable-unlicenced-generation-amount” EPİAŞ Transparency API web services were used. Capacity utilization rates of power plants were calculated using their Injection Quantity (UEVM) and installed capacities from the EPDK License Database (MWe).
During analysis, years where some plants had zero or very low capacity factors were excluded assuming these plants were not operational during those periods. Additionally, data for the year 2020 was excluded for five plants (Afşin-Elbistan A, Seyitömer, Tunçbilek, Kangal, and Çatalağzı) which were completely shut down and Soma, which was partially closed, due to not meeting air pollution limit values set by the Ministry of Environment, Urbanization and Climate Change. Similarly, production values for plants affected by events such as the earthquake in February 2023, like Afşin-Elbistan A in Kahramanmaraş, were also not considered.
Availability rates were calculated based on hourly data reported to TEİAŞ by power plants regarding their Available Installed Capacity (AIC). This data was obtained using the EPİAŞ Transparency Platform API web service “/production/aic”. Production losses due to malfunctions and their durations were captured using the EPİAŞ Transparency Platform API web service “/v1/markets/data/market-message-system” for the period 2020-2023, on a plant-by-plant basis. Production losses were calculated by multiplying the difference between the plant’s installed capacity and its capacity during the malfunction by the duration of the malfunction notification.
National greenhouse gas statistics were derived from the Turkish Statistical Institute’s (TÜİK) Greenhouse Gas Emission Statistics. Emissions from coal-fired power plants were based on EMBER calculations. The global heating value of coal was compiled from the United Nations Statistics Division’s 2024 Energy Statistics Yearbook. Efficiency rates of coal power plants in EU countries were calculated using Eurostat’s Electricity and Heat Statistics. The amount of coal required to generate 1 MWh of electricity was calculated using heating values from the United Nations database and efficiency data from Eurostat.
Acknowledgements
We would like to thank Ufuk Alparslan, and Sarah Brown for their contribution to the content, and Eva Mbengue for reviewing the English translation and for her valuable feedback. Also, we would like to thank Reynaldo Dizon for his contribution to data visualisation.
Photo creditIlkay dede / Alamy Stock Photo
LinksAccess to government data via the hyperlinks may be restricted outside Türkiye.