The dizzying pace of research and innovation at MIT can make it hard to keep up. To mark the end of the year, MIT News is looking back at 10 of the research stories that generated the most excitement in 2022. Designing a heat engine with no moving parts. In April, engineers at MIT and the National Renewable Energy Laboratory (NREL) designed a heat engine that might someday enable a fully decarbonized power grid. In demonstrations, the engine was able to convert heat to electricity with over 40 percent efficiency…