The effect of solution flow rate on plate heat exchanger fouling

Ploščni prenosnik toplote je podvržen neželenemu odlaganju materiala na površino prenosnika toplote, kar močno zmanjša njegovo učinkovitost. V pričujočem delu smo skozi kompaktni ploščni prenosnik toplote v protismernem režimu črpali vodno raztopino inverzno-topnih soli in med variabilnim spreminjanjem pretoka opazovali časovno spreminjanje mašenja in učinkovitosti prenosnika toplote. Analizirali smo vpliv skočnih sprememb pretoka na odlaganje nečistoč. Z infrardečo kamero smo merili površinsko temperaturo zgornje plošče, kar je omogočilo lokalno detekcijo mašenja. Ugotovili smo, da spreminjanje hitrosti pretoka skozi ploščni prenosnik toplote lahko izboljša učinkovitost prenosnika in zmanjšuje odlaganje nečistoč.A plate heat exchanger is subject to unwanted deposition of material on the surface of the heat exchanger, which greatly reduces its efficiency. In the present work, an aqueous solution of inverse-soluble salts was pumped through a compact plate heat exchanger in the counter-flow regime and, during variable changes in the flow rate, we observed the time change of fouling and efficiency of the heat exchanger. We analyzed the influence of sudden changes in the flow rate on the deposition of impurities. We measured the surface temperature of the upper plate with an infrared camera, which enabled local detection of fouling. We found that changing the flow rate through a plate heat exchanger can improve the efficiency of the heat exchanger and reduce fouling