Conserving heat consumption by modeling and optimizing efficiency of complex heat exchanger systemsTomasz Wyleciał, Dariusz Urbaniak, A. E. Barochkin, V. P. Zhukov and N. R. LeznovaE3S Web Conf., 154 (2020) 04004DOI: https://doi.org/10.1051/e3sconf/202015404004