Solar energy absorption by acrylic coatings–I: absorption characteristics

This paper presents the results of a larger study on application of acrylic plasters as external coatings in the passive heating systems. The efficiency of the heating system strongly depends on the physical and optical properties of the used materials, especially those used for the finishing coatings. Absorption characteristics as a function of colour and microstructural features of the external layer of coatings have been analysed in course of the presented investigation.