In parallel with the energy transition, fundamental changes are taking place in production and consumption patterns worldwide. In line with the principles of decarbonization and sustainability, renewable sources are becoming the cornerstone of energy. In this context, variable sources such as solar and wind are driving the rapid development of storage technologies.
Due to the fluctuating nature of solar and wind power on the grid, issues of energy security and stability are becoming increasingly critical. While excessive production may occur on days with intense sunlight, periods of low production pose risks to energy security. For this reason, the reliable and efficient storage of energy is emerging as an indispensable necessity. In the face of large-scale demand, advanced storage solutions can ensure continuity in energy supply.
Storage solutions encompass not only large-scale projects but also local and micro-scale applications. Pumped hydroelectric systems, whose reliability has been proven over many years, now require new technologies due to cost and geographic limitations. While lithium-ion batteries are used for storage at various scales, issues regarding lifespan and cost remain significant areas of debate.
Another important development is liquid air energy storage technology (LHEP). In this system, energy is stored by compressing air drawn from the atmosphere—turning it into a liquid—when demand increases, and electricity is generated by heating the air to recover the stored energy when electricity is needed. It stands out for its high energy density and long-term storage capacity; several large-scale projects in China and Europe aim to provide timely support to the grid using this technology.
Its operating principles consist of three basic steps: air is compressed to high pressure, liquefied, and stored; when needed, this liquid air is heated to turn it back into a gas, and electricity is generated via turbines. This approach is considered suitable for a sustainable energy infrastructure due to its ability to store energy for long periods with minimal loss and its relatively low environmental impact.
On a global scale, particularly in China and European Union countries, significant investments are being made in LHEP technology. Turkey, with its abundant geothermal, solar, and wind potential, can enhance energy supply security and strengthen sustainability by integrating this technology.
Economic and political challenges are intertwined with the widespread adoption of this technology. Installation costs and fluctuations in energy prices can influence investor decisions. Therefore, government support, subsidy policies, and market regulations should focus on reducing costs and increasing feasibility. Although costs currently stand at approximately $45 per megawatt-hour, large-scale production and joint investments could drive this figure even lower.
The energy paradigm of the future is being enriched by innovative solutions such as liquid air storage. These technologies are expected to play a significant role in reducing the carbon footprint and meeting global energy needs. With small-scale and local applications, the energy transition is projected to adapt to every region and every scale. New financing models and public-private partnerships are among the key factors that will accelerate the economic and technological maturation of these technologies.
