Justifying the productivity of a grain dryer in the climate of the Southern Urals Sergey Shepelev, Dmitry Vnukov, Vladimir Chumakov, Oleg Polushkin, Viacheslav Lebedenko and Svetlana Ponomareva E3S Web Conf., 135 (2019) 01012 Published online: 04 December 2019 DOI: 10.1051/e3sconf/201913501012