Solar water-heating system and panel thereof

A solar water-heating panel comprising a plurality of risers configured for utilizing solar radiation impinging thereon to heat a fluid therein, and each comprising a riser wall defining a fluid path extending in a longitudinal direction for flow therethrough of the fluid, the panel further comprising one or more headers for facilitating delivery of said fluid between said panel and an external source of the fluid, wherein said risers are parallely-arranged and free of direct attachment to one another, and each comprises a longitudinal fin projecting in a sideward direction therefrom toward and contacting an adjacent riser, said adjacent riser being free of an element obstructing movement of the fin in a lateral direction perpendicular to the longitudinal and sideward directions.

A solar water-heating panel comprising a plurality of risers configured for utilizing solar radiation impinging thereon to heat a fluid therein, and each comprising a riser wall defining a fluid path for flow therethrough of the fluid, the panel further comprising one or more headers for facilitating delivery of said fluid between said panel and an external source of the fluid, said risers being parallely-arranged and separate from one another, each comprising two longitudinal fins formed opposite one another and each projecting sidewardly therefrom towards an adjacent riser, each of said fins comprising a distal-most contacting surface contacting a distal-most surface of a fin of the adjacent riser, wherein said fins are formed such that said distal-most contacting surfaces are substantially planar and are disposed, in lateral cross-section, perpendicularly to a radius of their respective riser, thereby facilitating separation of adjacent risers when at least one of them flexes in a vertical direction being mutually perpendicular to the longitudinal and sideward directions.