TY - JOUR AU - Brodowicz, Kazimierz AU - Głowacka, Maria AU - Poniewski, Mieczysław AU - Szopa, Przemysław PY - 2011 TI - LUMPED MODELS OF DYNAMICS OF HEAT EXCHANGERS WITH CONCENTRIC TUBES JF - Journal of Power Technologies; Vol 44 (1974) KW - N2 - The aim of this article has been to present mathematical models to depict the dynamic behaviour of heat exchangers with concentric tubes. Two models have been presented: an overall lumped model, and a section-lumped one. The method has been quoted herein of obtaining operator transfer functions characteristic for the dynamics, and of deriving frequency characteristics out of those former. An analysis has been performed herein, of proporties of theoretical characteristics in comparison with experimental characteristics. UR - https://papers.itc.pw.edu.pl/index.php/JPT/article/view/83