Updated: May 2026
Energy has remained high on the agenda since the announcement of the European Green Deal, with Europe’s path to net-zero increasingly shaped by energy market volatility and the transition to a low-carbon energy system.
As countries continue to strengthen domestic energy systems and businesses and consumers face ongoing cost pressures, there is a risk that short-term solutions—such as increased reliance on fossil fuels—are used to safeguard energy outputs.
However, this isn’t the only way—or the most effective way—to ensure reliable power and support the energy transition. In fact, leveraging dispatchable clean power and improving overall system efficiency could accelerate the transition, increase domestic production and reduce energy costs. The key?
Getting the sustainable energy mix right.
Key Takeaways
- A large share of energy is lost as heat across industrial processes and power generation—this untapped resource can be converted into electricity.
- Waste heat recovery enables dispatchable, weather-independent power, complementing intermittent renewables like wind and solar.
- Low-temperature heat can also be utilized, expanding the addressable opportunity across maritime, industrial, and energy systems.
- Recovered energy translates directly into fuel savings and reduced ETS exposure, particularly in fuel-intensive sectors like maritime.
- Technologies such as ORC systems can be integrated with existing infrastructure, enabling efficiency gains without disrupting operations.
What Is the Sustainable Energy Mix?
The ‘sustainable energy mix’ is the range of sustainable energies that are used to generate power within a specific region or country. According to the latest statistics, renewable energy accounted for 24.5% of the EU’s gross final energy consumption in 2023 and 46.9% of its net electricity generation in 2024 (Eurostat, 2025), but which types of renewable power contribute to this output?
Recent statistics show that Europe’s total renewable electricity generation still comes from a relatively concentrated mix of sustainable power sources:
As shown above, wind and solar power—together with hydropower, which is dependent on water availability—account for more than 90% of Europe’s renewable electricity production, highlighting a continued reliance on weather-dependent and variable energy sources.
Safeguarding the Sustainable Energy Mix
A narrow mix of renewables inevitably threatens the reliability of sustainable power. If one type of renewable fails to produce expected outputs, for example, it could have a significant impact on Europe’s sustainable energy outputs as a whole.
Furthermore, Europe’s main renewable sources—wind and solar, along with hydropower which depends on water availability—are influenced by natural conditions, resulting in variable energy output.
Additionally, two of the main sources of renewable power in Europe - wind and solar - are non-dispatchable, which means they cannot provide reliable baseline power and cater for peaks in energy consumption. The potential over-production associated with non-dispatchable power can lead to inefficiencies, excess costs and the need for increased energy storage.
With weather dependency a major issue for Europe’s main source of renewable power, along with an emerging and potentially costly energy storage industry, it’s not surprising that renewable power as a whole is sometimes seen as unreliable. Indeed, failing to safeguard the renewable mix with alternative forms of dispatchable sustainable power could render renewables overlooked and underused.
By diversifying the renewable mix and increasing the reliability of green electricity, however, we can make clean energy a more attractive option to investors and power generators and increase the accessibility of green energy to consumers and businesses.
As confidence grows, the lower costs, optimal reliability and domestic production available via a more diverse sustainable energy mix can successfully increase both the demand and consumption of renewable power as a whole. In this sense, Waste Heat Recovery (WHR) can provide a solution to Europe’s ‘energy trilemma’ (EUISS, 2022) and provide sustainable energy that is secure, affordable and dependable.
What Role Does WASTE HEAT RECOVERY Play in Power Generation?
To date, waste heat recovery (WHR) has been a largely overlooked form of sustainable energy. As Climeon’s HeatPower technology shows, however, waste heat recovery can play a critical role in diversifying and safeguarding the sustainable energy mix.
In simple terms, waste heat recovery generates clean electricity from wasted heat. Using Organic Rankine Cycle (ORC) technology, Climeon’s HeatPower system takes low-temperature waste heat and converts it into clean, carbon-free energy.
Thermal energy in the form of low-temp heat is always generated as a byproduct by industrial processes and engines, as prescribed by the laws of thermodynamics. Electricity is more valuable than heat, easier to distribute and a key to the reduction of CO2 emissions.
Climeon's HeatPower 300 units utilize the thermal energy and generate electricity in a way that does not cause any additional emissions, does not depend on weather and is dispatchable. Furthermore, it can also provide a sustainable supply of electricity that is detached from the volatility of today's energy markets (KCORC, 2022).
Climeon's Organic Rankine Cycle (ORC) technology converts low-temp waste heat into clean, carbon-free electricity.
Industrial processes and engines used in power plants produce significant amounts of waste heat. When this waste heat is channeled into a HeatPower module, it is converted into clean electricity. By integrating waste heat recovery technology into power stations, the plant’s total output and renewable output increases.
To learn more about the role waste heat recovery can play in safeguarding the sustainable energy mix, take a look at some of the benefits on offer:
Benefits of ORC Waste Heat Recovery
Non-Weather Dependent Clean Power
Unlike many other forms of renewable power, such as wind and solar—along with hydropower, which depends on water availability—waste heat recovery is not weather-dependent and can produce clean, carbon-free energy 24x7x365, providing thermal energy is available.
For example, in a natural gas power station, excess waste heat is generated as a byproduct of the primary power generation process. When an Organic Rankine Cycle (ORC) system is integrated, this waste heat is captured and converted into sustainable electricity.
With no reliance on weather conditions, power station operators can be confident in their ability to produce sustainable energy at any time while in operation. This enables power stations to incorporate sustainable energy into their baseline power production and ensures waste heat recovery can become a much-needed form of reliable, sustainable power.
Case Study:
Recovering Waste Heat in PET Resin Production
At NEO GROUP’s PET resin production facility in Klaipėda, Lithuania, excess low-temperature heat from the production process was previously released through cooling systems without being utilized. By integrating a Climeon HeatPower 300 system, this waste heat is now converted into electricity—improving overall energy efficiency without impacting core operations.
This is a typical example of industrial waste heat recovery applied in energy-intensive manufacturing.
Key Results:
- ~2,700 MWh of electricity generated annually
- ~€250,000–300,000 in annual energy cost savings
Dispatchable Renewable Power
The demand for energy is in a constant state of flux, which means power generators must be able to account for sudden increases in electricity consumption. To facilitate this, ‘dispatchable’ energy sources are used. These dispatchable sources effectively mean that power can be produced on demand. Conversely, power generators can reduce or stop energy being produced when demand is met by using dispatchable sources, thus giving them complete control over production.
While the fossil fuels commonly used to produce electricity - coal and natural gas - are dispatchable, the most frequently used renewables - wind and solar - are not.
As these non-dispatchable sources of power cannot be relied upon to deliver baseline power, many energy producers are understandably apprehensive about being totally reliant on them. Similarly, investors may be wary of backing renewable plants that cannot offer consistency and reliability.
However, waste heat recovery is a form of dispatchable, sustainable energy that can be relied upon to meet fluctuating demand and contribute to baseload power production. Providing thermal energy is available, Climeon's ORC HeatPower units can generate clean electricity at any time. With the systems ability to automate carbon-free electricity production via the control management system or manually adjust production settings, power stations can increase the reliability of their sustainable energy outputs in response to demand.
In this sense, waste heat recovery not only diversifies the sustainable energy mix but it also provides the enhanced security, consistency and reliability that is critical to successfully integrating sustainable power into the mainstream energy mix.
Domestic Production
Recent statistics show that 58% of Europe’s energy comes from imported sources (Europa), with some countries more heavily reliant on imports than others. However, strained international relations have highlighted the risks associated with having such a high energy dependency rate.
Due to this, many European countries are eager to increase domestic energy production. As well as safeguarding energy supplies, this gives EU countries greater control over pricing and even enables governments to generate additional profits from energy sales.
Of course, domestic energy production can only be successful if a country has access to the raw materials required to produce power. To date, Europe has predominantly been using natural gas and fossil fuels to generate energy, hence the need to import resources from non-EU sources.
By increasing sustainable power generation, however, European countries can boost domestic production and reduce their energy dependency rate accordingly. With the ability to generate increased energy outputs via HeatPower, even power plants still using fossil fuels can reduce their reliance on imports and maintain existing outputs with on-site waste heat recovery technology.
FAST INTEGRATION & IMMEDIATE OUTPUTS
In the midst of an energy crisis, efficient solutions are needed to shore up energy supplies, reduce costs and retain confidence. While new renewable solutions are emerging, the relatively slow speed at which they can be tested and/or deployed renders them unsuitable saviors given the immediate need for clean, affordable, domestic energy supplies.
Similarly, increasing domestic production of existing renewables typically means building new wind farms or producing thousands of extra solar panels. Not only does this require investment in materials and land, but it takes a considerable amount of time for sites to be commissioned and fully operational.
In contrast, HeatPower systems can be integrated into new and existing power stations comparatively easily. Engineered with a minimal footprint and designed for simplicity, Climeon’s low-temp ORC system ensures a robust and hassle-free integration with few interfaces. From super-efficient, next-gen, low-carbon power plants to traditional fossil-fuel-powered sites, the HeatPower modules can utilize the waste heat that’s already being produced to maximize efficiency, increase energy outputs and generate carbon-free power.
Furthermore, the speed at which HeatPower systems can be deployed and integrated ensures optimal performance from the get-go. At a time when reliable, sustainable and affordable energy is desperately needed throughout Europe, waste heat recovery provides a fast and proven way to generate cost-effective, carbon-free electricity now.
Low-Cost Energy
Energy costs reached an all-time high in Europe in 2022 (Europa, 2022) with governments, businesses and consumers all scrambling to find lower cost power options. When we rely so heavily on imports and fossil fuels, however, we remain at the mercy of external providers who can effectively set any price for the commodities we need.
Fortunately, waste heat recovery overcomes these issues in a number of ways to provide a low-cost and sustainable addition to the energy mix.
Firstly, waste heat recovery relies on resources that are already being produced, namely waste heat. In fact, this thermal energy is typically produced as a byproduct of an existing process (such as an operational turbine, combustion engine, or manufacturing process). By converting this overlooked byproduct into a usable, renewable asset, HeatPower significantly reduces the cost of producing sustainable power.
Secondly, HeatPower systems can be integrated into existing power stations or industrial plants, which ensures modules can be installed cost effectively. Instead of having to build new wind farms or produce thousands of solar panels to generate intermittent sustainable energy, for example, existing power stations can simply increase their sustainable outputs by installing HeatPower systems alongside their existing infrastructure.
Lastly, Climeon’s HeatPower systems have a relatively low payback period combined with low operating costs. Giving power stations and investors the opportunity to increase sustainable energy outputs, safeguard energy production and reduce operating costs, waste heat recovery could be a cost-effective and lucrative addition to the mix.
Discover the Potential of ORC Waste Heat Recovery
We’re always happy to help! If you want to discover how waste heat recovery solutions can optimize energy efficiency in your industry, or learn how Climeon’s HeatPower modules can be seamlessly integrated into power plants, manufacturing processes, or industrial facilities, reach out to our expert team today.
Whether you're looking to reduce costs, increase energy output, or lower emissions, we have the technology to meet your needs. Contact us now for a free consultation, or explore our case studies to see how we’ve helped industries like yours achieve sustainability and energy savings.
