EXPO-2017: engine of alternative types of energy of the future Z. K. Ayupova, D. U. Kussainov, Zh. K. Madalieva, G. D. Rakhimova, B. Zh. Saparov and A. M. Seralieva E3S Web Conf., 124 (2019) 01048 Published online: 25 October 2019 DOI: 10.1051/e3sconf/201912401048