Alfa Laval Unveils Next-Generation Once-Through Steam Generator to Power Modular Thermal Energy Storage Systems

Published: 10 Nov 2025

Author: Precedence Research

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A major player in the Swedish heat transfer technology market, Alfa Laval, has presented a new once-through steam generator (OTSG) designed to operate in modular thermal energy storage systems that use molten salt as a heat medium. This high-efficiency OTSG is intended for both renewable and hybrid energy plants and is a compact, durable choice for the new generation of thermal storage technology. It flexibly and efficiently converts energy by integrating with renewable energy sources, such as solar photovoltaic (PV) systems, to form a power plant with a capacity of 2-10 MW.

Alfa Laval also claims that, due to its small size and high throughput, the OTSG can be used in modular mode, especially where space, scale-up, and cycle stability are important. It has a competitive advantage in dynamic power generation due to its ability to start and operate at very low loads. As the market needs clean energy and efficient thermal storage continues to grow, Alfa Laval's innovation aligns with the global ambition to decarbonize power generation and maximize energy flexibility.

Another strong point of the new OTSG from Alfa Laval is its outstanding thermal efficiency and operational stability. The helical coil arrangement provides a high heat-transfer surface in a small area. Thus, it saves space when installing coils in large areas and minimizes material fatigue under high-pressure conditions. Through its built-in thermal expansion accommodation, the unit can withstand constant cycling without deterioration. This is very important in renewable energy setups, where systems must start, stop, and adjust to fluctuating energy inputs.

The modularity of the unit also aligns with the changing energy landscape of decentralization and digitalization, with distributed generation systems replacing large, centralized power plants. OTSG The Alfa Laval OTSG ensures flexibility across markets and geographies by providing a scalable design that spans from small-scale demonstration projects to commercial-level energy facilities. It can also be easily transported, installed, and attached to new and existing facilities, as it is compact and can be reduced to a much smaller size. Furthermore, Alfa Laval is pushing the limits of thermal engineering to become more sustainable and create a sustainable worldwide energy ecosystem by integrating durability, safety, and efficiency.