Main Problems of Hydrodynamics of a Flat-Plane Solar Collector

In this paper, the relevant hydrodynamic aspects occurring in the implementation of flat-plate solar collectors are reviewed. It studies causes for non-uniform coolant flow distribution, which plays a role in heat transfer and system losses. Particular attention is paid to the formation of air lock, increase of hydraulic resistance and effect of flow situation on overall collector efficiency. It underlines the importance of enhance design of distribution systems, optimal coolant flow and fouling prevents for better performance in solar collector. The reduction or elimination of hydrodynamic problems leads to enhanced reliability and longevity of solar thermal systems.