20.500.12556/RUL-128361 Minimization of the lifecycle cost of a rotary heat exchanger used in building ventilation systems in cold climates Minimizacija stroškov življenjskega cikla rotacijskih prenosnikov toplote za stavbne prezračevalne sisteme v hladnih podnebjih This article presents an analysis of rotary heat exchangers (RHE) used as heat recovery units in building ventilation systems in cold climates. Usually, heat exchangers with the highest heat transfer efficiency are the preferable option for this purpose. However, such exchangers usually have the highest media pressure drop, thus requiring the highest amount of energy for media transportation. In this study, the problem is solved by analysing the lifecycle cost (LCC) of the RHE including both the recovered heat and the electricity consumed in the fans of the air handling unit (AHU). The purpose of the investigation was to determine the optimal set of geometrical characteristics such as the exchanger%s length, foil thickness, the height and width of the air channel. Two hundred and seventy different combinations were examined using analytical dependencies and ANSYS simulations. The results are compared with experimental data obtained earlier at the KOMFOVENT laboratory. The results show that the best overall energy efficiency is obtained in heat exchangers that do not offer the best heat recovery efficiency, and LCC differences in the same climatic and economic conditions can go as high as 31 %, mainly due to the geometrical parameters of the heat exchanger. rotary heat exchangers heat recovery ventilation systems temperature efficiency pressure loss ANSYS lifecycle cost rotacijski prenosniki toplote rekuperacija toplote prezračevalni sistemi temperaturni izkoristek tlačni padec ANSYS stroški življenjskega cikla true false true Angleški jezik Slovenski jezik Članek v reviji 2021-07-09 13:36:55 2021-07-09 13:37:01 2025-03-11 14:58:25 0000-00-00 00:00:00 2021 0 0 Str. 302-310 no. 6 Vol. 67 June 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 628.8 0039-2480 10.5545/sv-jme.2021.7168 69792259 RAZ_Sokolnikas_Ignas_2021.pdf RAZ_Sokolnikas_Ignas_2021.pdf 1 65794EB8DAB99A853557F9784A25511B 48fdebc029e3d6b38ab1136c1dc2856153e5bfcce0b82d5b73ad611920367777 233fc390-e0aa-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145077 https://www.sv-jme.eu/sl/article/minimisation-of-the-life-cycle-cost-of-a-rotary-heat-exchanger-used-in-building-ventilation-systems-in-cold-climates/ 1 d91ce3d6-e0a9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145076 Fakulteta za strojništvo Strojniški vestnik 0 0 0