20.500.12556/RUL-135184 Performance of the condensation process for water vapour in the presence of a non-condensable gas on vertical plates and horizontal tubes The condensation of humid air is a crucial step in air conditioning and process engineering. However, the models that describe the condensation of vapour in the presence of a non-condensable gas require time-consuming numerical calculations that go beyond the Nusselt film theory. Only a small number of publications exist, where simple and computationally effective correlations for the condensation of water vapour in the presence of air are presented for specially designed condenser heat exchangers. Therefore, the objective of this paper is to extend the existing semi-empirical correlations for different geometries and process parameters. For the purpose of the study, an experimental setup with two different condenser heat exchangers based on vertical plates (height 74 mm) and horizontal tubes (3 tubes, diameter 40 mm and 7 tubes, diameter 15 mm) was built. Additionally, based on existing correlations, we developed two semi-empirical models that predict the condensation mass flux for the proposed geometries. Here, we report that the agreement between the experimental and theoretical values predicted by the new, semi-empirical correlations is excellent, with an average uncertainty of less than ±6%. Their usability was demonstrated by a possibly significant performance improvement of the condenser inside a condensation-type tumble dryer. condensation humid air water vapour non-condensable gases mass transfer condenser flat plates horizontal tubes kondenzacija vlažen zrak vodna para nekondenzirajoči plini prenos snovi kondenzator ravne plošče horizontalne cevi true false true Angleški jezik Slovenski jezik Članek v reviji 2022-02-28 10:15:28 2022-02-28 10:15:36 2022-09-14 04:12:02 0000-00-00 00:00:00 2021 0 0 28 str. iss. 8, art. 2291 Vol. 14 Apr. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.876.5:66.048.914(045) 1996-1073 10.3390/en14082291 60378627 RAZ_Poredos_Primoz_2021.pdf RAZ_Poredos_Primoz_2021.pdf 1 CA56102A309080C0B0D394620AF5BA84 486c6634710470df1944223192db8cbbe8eafcfa0b1d2e11f71e10dc83b13d74 04032d77-9877-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154076 https://www.mdpi.com/1996-1073/14/8/2291 1 ba063326-9876-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154075 Fakulteta za strojništvo 0 0 0