The paper analyzes and compares methods for calculating heat transfer during boiling of refrigerants in horizontal pipes, as well as works devoted to the study of two-phase flows in minichannels. The main provisions of the comprehensive analysis method based on true phase parameters were formulated. It was found that for all the values of the mass velocity, there is a significant discrepancy in the calculated data, while the method based on the comprehensive analysis provides the best agreement with the experiment. The comprehensive method was tested in relation to the analysis of heat-hydrodynamic processes at boiling in minichannels. Comparison of the calculation results using the method based on true phase parameters with the experimental data showed a good agreement.

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This article is devoted to the development of a methodology for calculating the hydrodynamic characteristics of liquids boiling in mini-channels. In contrast to the well-known methods, the proposed methodology is based on the use of the true volumetric steam content and prediction of two-phase flow regimes in the field of a steady flow. The article presents experimental data on the true volumetric steam content, pressure loss, and two-phase flow pattern in mini-channels

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