BAE Systems has selected Reaction Engines to conduct a study on utilizing novel heat exchanger technology for waste heat recovery and exhaust cooling on naval ships. The focus of the study is to assess the feasibility of implementing Reaction Engines' lightweight and compact heat exchangers to enhance the efficiency of naval vessels. These heat exchangers can be integrated with current diesel engines, gas turbine propulsion systems, and potential future hydrogen or hybrid-electric alternatives. The primary goals of the study are to investigate the environmental benefits, energy efficiency improvements, emissions reduction, and potential operational advantages of incorporating this technology. Oliver Nailard, the Business Development Manager at Reaction Engines, expressed enthusiasm regarding the collaboration with BAE Systems, emphasizing the expected positive outcomes such as enhanced energy efficiency, reduced emissions, and possibly decreased thermal signature for naval operations. This partnership highlights the ongoing efforts within the defense industry to explore innovative solutions for improving the sustainability and performance of naval fleets.