convecting solar pond

A solar pond is a man-made body of salt water that captures and stores solar energy to provide heat and power. Unlike freshwater ponds where heat dissipates, solar ponds use salt to prevent heat loss.

There are two main types:
* Non-convecting solar ponds use a high salt concentration in the bottom layer to trap heat, preventing convection. A middle, less salty layer acts as an insulator. Heat is then extracted via pipes.
* Convecting solar ponds prevent evaporation instead of convection, using a sealed bag of water with insulation and glazing. Hot water is pumped to storage tanks at night.

Solar ponds offer a sustainable alternative to fossil fuels, providing heat for industrial processes, greenhouses, and electricity generation. They are cost-effective and do not cause air pollution, but require significant land and maintenance.12