The course extends the view of the technical equipment of very often overlooked part of the overall design, which has a major impact on its reliability and efficiency. This is a cooling design that uses selected chapters from hydromechanics, thermodynamics and heat transfer. The main focus is on methods of cooling design and description of steady state and transient heat transfer. In particular, emphasizes the interaction of electrical, mechanical and thermal parts that describes the behavior of electrical machines or equipment. Particularly, emphasizes the interaction of electrical, mechanical and thermal parts that describes the behavior of electrical machines or equipment.