On May 19, 2023, an online meeting of section 1.1 “Modeling of work processes in heat-technological, power equipment and energy saving problems” of the XXXI International Scientific and Practical Conference “Information technologies: science, engineering, technology, education, health” MicroCAD-2023 was held on the Teams platform. The chair of the section is Professor Anton Ganzha, the secretary is Victoria Pavlova. The meeting was attended by teachers, graduate students and students of the Institute of Education and Science in Power Engineering, Electronics and Electromechanics of NTU “KhPI”. During the meeting, reports were presented on theoretical and practical developments in relation to modern energy-efficient technologies.