HomeRenewablesBiomassThermal power ready for fresh challenges

Thermal power ready for fresh challenges

Thermal power has a vital role to play in the post-COP21 landscape of the European power sector, says Patrick Clerens


Existing thermal plants need little modification to use biomass

Credit: TàƒÅ“V SàƒÅ“D

The Paris Agreement, with its long-term target to limit the global temperature rise to well below 2à‹Å¡C compared to pre-industrial levels, has set a clear path for future investments in low-carbon technologies and will strengthen the European Union‘s efforts to reduce carbon emissions. By the end of 2016, the European Commission will release a set of legislative proposalsà‚ to further increase the share of renewableà‚ energy sources in the EU and to redesign the European electricity market in order to develop a secure, sustainable and competitive energy system. Efforts should now be focused on delivering cost-effective solutions to reconcile the EU’s objectives on climate change, energy and growth.

Thermal powerà‚ is part of the solution to ensure a secure, reliable and affordable electricity supply in Europe. Suppliers of efficient, state-of-the-art thermal power generation technologies are ready to play their part in tackling these challenges.

Setting the direction

Partly driven by this regulatory framework, Europe’s electricity system and energy mix are experiencing rapid and significant changes, including the increasing penetration of intermittent energy sources.

Between 1990 and 2012, the relative importance of intermittent renewables in the EU more than doubled, from 12 per cent to 25 per cent (with wind going from 0.03 per cent to 6.2 per cent and solar from 0.0005 per cent to 2.2 per cent). This increase led to a reduced use of conventional energy sources and nuclear power for electricity generation.

As the share of intermittent renewable power generation continues to grow, the role of thermal power generation becomes increasingly important since it complements the intermittent nature of renewables with dispatchable and flexible backup generation.

Thermal power has long been the backbone of the electricity generation market, providing the necessary balancing and backup services whenever intermittent renewables cannot cover the in-time energy demand. A comparison of different decarbonization scenarios in 2030 (by, amongst others, Greenpeace, the European Climate Foundation and the European Commission) shows that thermal power will continue to play a prominent role within the energy mix – the predicted proportion of thermal power generation (including biomass) in 2030 will range from 34.1 per cent to 53.3 per cent, despite – or because of – the increasing deployment of intermittent renewables.

European excellence

Changes in the energy system require technological adaptations to ensure the optimal contribution of thermal power generation in the future. Over the last two decades, energy efficiency has substantially increased, both on the consumption side – reducing the demand – and on the generation side – increasing the production with less energy input. On the generation side, thermal power technologies have embraced these trends and have made huge improvements to become increasingly flexible, clean and efficient.

Retrofitting/replacing thermal power plants with state-of-the-art technologies has proven beneficial in terms of efficiency increases and emissions abatements.

Retrofits by EPPSA members show up to 31 per cent in fuel savings and CO2 emission reductions. When taking into account the various cost savings, this was done at a negative avoidance cost of almost €20 ($23)per tonne of CO2 (i.e., €20 profit per tonne of CO2 not emitted).

Considering the predicted proportion of thermal power generation in 2030, retrofitting/refurbishing aging, less efficient and more polluting power plants with state-of-the-art technologies is of paramount importance.

Innovative solutions are also emerging that integrate intermittent renewables directly in thermal power generation systems. One example of this is concentrated solar power (CSP), where concentrated sun rays generate superheated steam, which feeds into a steam turbine to produce electricity.

New developments have increased the dispatchability of solar-based thermal power generation by dissociating steam production from solar energy absorption, for example through energy storage.

Power plants can also be designed for fuel flexibility, for example by running on a mix of 1 per cent to 100 per cent biomass. Sustainably harvested biomass is CO2-neutral, meaning that any primary fuel replaced by it is reducing the CO2 emission per kWh produced.

Existing thermal power plants, with relatively lower operational costs, need little to no modification to use biomass, making it highly cost-effective to produce electricity from biomass. Increasing the use of biomass increases the flexibility of power generation, the security of energy supply, and reduces the dependence on fossil fuel imports, while maintaining an affordable energy supply.

Modern thermal power plants are also prepared for carbon capture and storage. CCS and usage technologies (CCSU) have a huge potential for CO2 abatement for both the industrial and power generation sectors. When combined with biomass, CCSU can allow going CO2-negative. Efforts are now needed to demonstrate CCS on a large scale. Failure to do so would be very costly and make it difficult or even impossible to reach the EU’s climate targets.

Global standards

Thermal power contributes significantly to the European economy in terms of employment, taxes and growth. A study by German engineering association the VDMA shows that, in Germany alone, around 36,000 jobs depend on a continued active role of the thermal power plant suppliers’ industry – an industry with a turnover of around €6 billion on the global stage.

Figure 1. Projected generation mix in 2030

Source: EPPSA, Thermal Power in 2030

European Commission President Jean-Claude Juncker has said: “My first priority as Commission President will be to strengthen Europe’s competitiveness and to stimulate investment for the purpose of job creation”.This commitment should translate into a balanced regulatory framework, ensuring fair competition in the global economy and allowing thermal power to contribute to a greener economy and society.

Setting global standards with these state-of-the-art EU technologies is necessary to ensure worldwide shared efforts, CO2 abatements and a level playing field. In this context, the support and collaboration from European and international authorities is key. Increasing investments in research, development and demonstration are necessary to drive EU competitiveness and ensure an affordable, low-emission power supply. Favouring support and availability of financing options to certain technologies over others may foster lower overall efficiency and poorer emissions rates due to up-front capital cost differences between subcritical and high-efficiency low emission technologies, resulting in more CO2 emitted and non-EU technologies prevailing.

The COP21 targets and the upcoming EU Winter Package will result in further national efforts to reduce CO2 emissions, creating new challenges for the European energy production system. Despite – or perhaps because of – these changes, thermal power is set to have a prominent role in the energy mix of tomorrow. EPPSA supports the deployment of renewable energy sources and underlines that thermal power generation technologies can provide the necessary flexibility and dispatchability to ensure a stable and cost-effective electricity supply in Europe.

EPPSA members look forward to working constructively with EU institutions and stakeholders to address these challenges, and to ensure that the added value of the European Thermal Power Technology is recognized in a fair and balanced legislative framework, supporting the move to a low-carbon Europe.

Patrick Clerens is Secretary-General of the European Power Plant Suppliers Association (EPPSA), the voice, at European level, of companies supplying power plants, their components and related services. www.eppsa.eu