Energy resources are of great importance for human life. Today, the intensive spread of renewable energy sources (RES) in the world is the result of complex political, social, economic and natural resources that have been developing over the past 40-50 years. These processes are associated with different levels and dynamics of economic development of states, an increase in energy consumption, an uneven distribution of natural resources, an increase in the world's population and climatic changes. The energy-saving way of economic development presupposes a significant reduction per unit of product consumption of fuel, electricity and heat at the final stage of their consumption; improvement of production, transportation, transformation and storage of energy resources; improving the structure of the energy balance in the direction of replacing scarce and expensive energy resources in it with cheap and affordable renewable energy sources. The growth of production and consumption is inextricably linked with the development of society, throughout its development it is fighting to increase its energy balance. The struggle for energy, for its source, for the discovery of new ways of transforming and using it is going on continuously and at an ever-increasing pace. The development of renewable energy sources in the world is associated with limited energy resources. From renewable energy sources, the use of solar energy, wind energy, water energy, environmental energy, geothermal energy, biomass energy has been obtained. Most of all in Ukraine, biomass energy is used to obtain thermal energy. Also, the use of environmental energy has been developed due to the introduction of heat pumps in heating systems of buildings, in the technological processes of drying and cooling.