Introduction. The first law of thermodynamics. The second law of thermodynamics. Differential equations of thermodynamics. Equilibrium in thermodynamics systems and phase changes. Thermodynamic properties of substances. Basic thermodynamic processes. Fluid flow processes. Methods to analyze the efficiency of thermopower plants. Gas power cycles. Vapour power cycles. Cycles of direct-energy conversion systems. Refrigeration cycles. Humid air. Fundamentals of chemical thermodynamics.