Increasing the efficiency of solar water heating installations with flat-flat collectors: Optimization of circuit solutions and mode parameters

This research paper provides an increase in the energy efficiency and reliability of self-draining solar plants by optimizing their hydrodimatic operating modes. Based on this goal, the objectives of the study were to analyze the existing methods of protecting solar collectors of water heating and hot water supply systems from freezing and to identify the most promising methods. Also, the identification of the regularities of the hydrodynamics of a self-draining solar circuit. The task of increasing the efficiency of flat solar collectors in heat supply systems by optimizing their operating parameters under conditions when their weight and size characteristics and parameters of heat engineering perfection, that have been worked out well enough in world practice is studied and reached the parameters close to their limiting values. The aim of the study is to identify the features of improving the efficiency of existing flat solar collectors in heating systems by optimizing their operating parameters that affect the average temperature of the absorbing heat exchanger. It is shown that increasing the efficiency of flat solar collectors in heating systems can be achieved by two ways.