Abstract: The deep storage pond may comprise a flexible plastic bag or a rigid plastic compartment supported by a containment structure which may comprise insulating and supporting walls underground with an open top. The solar energy collector may comprise a smaller absorber bag or compartment of the same material which can be mounted atop the storage pond. Black-dyed water is used as the absorbing and storage medium and when the absorber bag temperature reaches an optimum value the contents thereof are transferred to the storage pond and subsequently replaced by cooler water from the bottom of the storage pond. The absorber means may be remotely located from the storage means.

Abstract: This invention utilizes a solar radiation absorbing fluid (i.e., a black fluid) for direct solar energy to thermal energy transfer. The unique structure of the several disclosed embodiments of this invention provides for a selected distribution and a selected depth of the absorbing fluid in the solar energy exposed area.The disclosed apparatus converts solar radiation energy into thermal energy with higher conversion efficiency, lower material and manufacturing costs and considerable weight reduction compared to conventional solar collectors.

Abstract: This invention utilizes a solar radiation absorbing fluid (i.e.: a black fluid) for direct solar energy to thermal energy transfer. The unique structure of the several disclosed embodiments of this invention provides for a selected distribution and a selected depth of the absorbing fluid in the solar energy exposed area.The disclosed apparatus converts solar radiation energy into thermal energy with higher conversion efficiency, lower material and manufacturing costs and considerable weight reduction compared to conventional solar collectors.