Panels with a frame cut from teak flooring. These sketches could be used for other screen and storm window panel systems.
This is a PDF scan of an old sketch problem for a porch enclosure.
The usable ideas for today would be the use of T&G 3/4" flooring to make the interlocking frames and the use of shelving clips to allow for easy installation and removal of the panels. This system could be adapted to storm windows and screen panels as well.