CEA-Liten: Development of an Ammonia/Water Absorption Heat Transformer to upgrade low-temperature industrial waste heat

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Advancing Industrial Sustainability with Ammonia/Water Absorption Heat Transformers

At this year’s HTHP Symposium, Romain Collignon from CEA-Liten presented interesting findings on innovative sorption systems and addressed the pressing need to reduce energy consumption and CO2 emissions in industrial processes.

The research targets the efficient use of waste heat—a significant portion of which is released at low temperatures (<100°C) and is often underutilized in industrial processes. By employing an absorption heat transformer and upgrading waste heat to more useful temperatures, industries can significantly reduce their reliance on fossil fuels.

The poster presentation focused on the numerical performance evaluation of a single-stage absorption heat transformer, specifically designed to recover low-temperature waste heat from industrial processes and transform it to higher temperatures suitable for various applications, such as steam production.

- Sorption systems offer a promising avenue for harnessing waste heat efficiently and sustainably when dealing with rising energy demands and CO2 emissions, says Romain Collignon, CEA LITEN. The potential benefits of this technology are immense as waste heat can be converted into valuable and useful energy.

Through modeling and simulation, the project provides valuable insights into the performance of the absorption heat transformer under varying operating conditions. The findings have shed light on the system's COP, electricity consumption, and expected output temperature, paving the way for lower CO2 emissions and greater energy efficiency.

Key Highlights

Demonstration case

• The project explores an ammonia/water absorption heat transformer designed to upgrade low-temperature waste heat (<100°C) to higher, usable temperatures, enabling applications such as steam production in industrial processes.

Impact

• This innovative system offers a sustainable solution to reduce CO2 emissions and fossil fuel dependence by harnessing underutilized waste heat, significantly improving energy efficiency in industries.

Technology partner

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