INTERCIENCIA, cilt.57, sa.12, ss.14-27, 2023 (SCI-Expanded, Scopus)
It is generally subjected to a drying process to extend the shelf life of agricultural
products and to obtain products with high added value. Commonly used drying
methods are open-sun, hot air, infrared, microwave, and hybrid methods. The
open-sun drying method is advantageous in terms of energy consumption and
practicality. However, it is quite disadvantageous in terms of obtaining a
homogeneous temperature distribution and hygienic end product. For this reason,
renewable energy sources are used both to reduce the increasing energy
consumption and to provide a quality and fast drying process. Especially solar
dryers have become quite popular. However, one of the most important problems
in solar dryers in the literature review is the temperature difference between the
drying racks. This problem causes an increase in energy consumption and the
formation of end products that are not of homogeneous quality. In this study, the
temperature distribution between the shelves of a conventional dryer with a solar
assisted heat pump was modeled with artificial neural networks. Present
calculations revealed the lowest total cost value as 54.48 at 55 ºC target
temperature, 3.5 m/s airflow rate, and 43º diffuser angle of the drying machine.