Classification of energy forms. Basic concepts and measurement units for energy and power. Primary forms of energy. Transformation of primary forms of energy into more suitable forms of energy. Transformation of chemical energy into internal energy. Boilers. Devices for combustion. Heat balance of steam boiler. Heat transfer in boiler. Calculations of boiler’s heating surfaces. Transformation of internal thermal into mechanical energy. Steam turbines. Nozzle processes. Force, momentum and power at moving blades. Gas turbines. Combined cycle plants. Transformation of internal thermal into mechanical energy. Transformation of potential energy of water into mechanical energy. Transformation of mechanical into electrical energy. Transformation of nuclear energy into internal energy.