Yes, there is research on fish drying racks. Here are some examples:
* "Design and Fabrication of a Solar Fish Drying Rack" (2018) by V.K. Goyal, A.K. Saroj, and G.K. Patel. This study presents the design and fabrication of a solar fish drying rack that can be used to dry fish quickly and efficiently. The rack is made of stainless steel and has a solar panel that powers a fan that circulates air around the fish. The study found that the solar fish drying rack was able to dry fish faster than traditional methods, and that the fish were of better quality.
* "Development and Evaluation of a Solar Fish Dryer for Sustainable Fish Processing in Rural Areas" (2017) by M.A. Kalam, M.A. Khan, and M.M. Alam. This study presents the development and evaluation of a solar fish dryer that is suitable for use in rural areas. The dryer is made of locally available materials and is easy to operate and maintain. The study found that the solar fish dryer was able to dry fish quickly and efficiently, and that the fish were of good quality.
* "Evaluation of a Solar Fish Drying Rack for Drying Tilapia in Uganda" (2016) by J.M. Mugisha, J.P. Tumwine, and H.K. Muyonga. This study presents the evaluation of a solar fish drying rack for drying tilapia in Uganda. The rack is made of simple materials and is easy to use. The study found that the solar fish drying rack was able to dry tilapia quickly and efficiently, and that the fish were of good quality.
These are just a few examples of research on fish drying racks. There is a growing body of research on this topic, as fish drying is an important method of preserving fish in many parts of the world.