There’s a company called RayGen trying something along these lines at grid scale. They use concentrated PV to generate electricity directly, and the cooling wa

There’s a company called RayGen trying something along these lines at grid scale. They use concentrated PV to generate electricity directly, and the cooling water goes into a pond (with insulation on top) that reaches ~90C. They also have a “cool pond” cooled using a heat pump to just above freezing. The combination of the heat and cold reservoirs are used to run a turbine with a low boiling point fluid. Obviously with the low temperature differentials it’s not terribly thermally efficient, but the proponents claimed the cost of electricity combined with the storage will make it viable in sunny locations. https://raygen.com/ https://raygen.com/