Аннотация
Abstract The method of heat protection and control of phenophases of fruit trees by means of a ring energy divider with insert in the zones of risky agriculture has been developed. This method is performed on the principle of a heat pipe (thermosyphon) or thermopile working in the device of a ring energy divider. The naturally circulating coolant can change the aggregate state, and the presence of a capillary porous structure in the ring channel facilitates the efficient transport of the liquid. The problem of soil freezing was solved as a task of a semi-infinite solid body, when the heat flux passing through the surface of the soil was about 5 W∙m −2 , and the driving pressure was −9 °C. The operating pressure is established, the temperature profile is measured, and the coolant consumption and the type of porous structure are optimised. The economic impacts on one tree will make approximately $50, and for a fruit zone of the Republic of Kazakhstan, the economic impacts exceed 500 million dollars per year.