The Department of Defense, specifically the Navy, is seeking proposals for the development of a Smart Exhaust Waste Heat Recovery Unit (SEWHRU) aimed at enhancing the thermal efficiency of diesel engines. The objective is to create a self-cleaning unit capable of capturing and transferring at least 50% of the waste heat from exhaust flue gas, which ranges from 500 to 1200 °F, to an intermediate working fluid for conversion into useful work. This technology is critical for improving fuel efficiency and reducing environmental impact in both military and commercial applications, particularly in the internal combustion engine and electric power generation sectors. Proposals are due by February 21, 2024, with further details available on the DOD SBIR/STTR website.