Scientific approaches to solving the problem of joint processes of bubble boiling of freon and its movement in a coil

The combined processes of nucleate boiling and refrigerant movement in the tubes of a heat pump are considered. A coil located on the back side of the photovoltaic panel (PV) is used as an additional heating surface. A mathematical model has been created to theoretically determine the temperature on the front surface of a solar cell cooled by freon in a coil from the rear side. A peculiarity of the numerical modeling of nucleate boiling of freon in a coil was the insufficiently detailed study of the process and the lack of references to the results obtained in earlier works. The boundary conditions and assumptions in the numerical modeling of the process of nucleate boiling of freon R407C are clarified, the results are compared with the theoretically found values, which are subsequently used in the design of an energy technology complex consisting of a heat pump and a photovoltaic panel. A mathematical model for theoretical calculation of PV temperature and a methodology for constructing a numerical model of nucleate boiling of freon as part of the methodology for designing energy technology complexes based on renewable energy sources are presented for the first time.