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2019, vol. 23, br. 1, str. 1-5
Statistička ocena dvoparametarskih modela sorpcionih izotermi
aFaculty of Technical Sciences, Bitola, Macedonia
bFaculty for Safety Engineering, Sveti Nikole, Macedonia
cUniverzitet u Novom Sadu, Poljoprivredni fakultet

e-adresavangelce.mitrevski@uklo.edu.mk
Ključne reči: izoterme sorpcije; dvoparametarski modeli; statistička ocena
Sažetak
Krive sorpcije i desorpcije su veoma važne pri definisanju ravnotežne vlažnosti i aktivnosti vode. Predviđanje promena ovih veličina u zavisnosti od uslova okolnog vazduha su veoma važne za sušenje i skladištenje poljoprivredg proizvoda. Izoterme sorpcije vlage opisuju odnos između ravnotežnog sadržaja vlage i aktivnosti vode pri konstantnim temperaturama i pritiscima. Za preradu prehraambenih materijala važne su sorpcione izoterme u modelovanju procesa sušenja, projektovanju i optimizaciji opreme za sušenje, predviđanju stabilnosti roka trajanja , izračunavanju promena vlažnosti, koje se mogu pojaviti tokom skladištenja i izborodgovarajućeg materijala za pakovanje. U radu su korišćeni esperimentalni podaci ispitvanja sorpcionih osobina dunje, odnosno sorpcionih krivih. Ove krive predstavljaju se matematičkim funkcija - modelima, čiji parametri se ispituju eksperimentima. Za aproksimaciju sorpcionih podataka prehrambenih materijala u naučnoj literaturi dostupni su brojni matematički modeli. Zavisno od broja parametara, modeli mogu biti jedno, dvo, tro ili više parametarski. U radu je prikazana statistička ocena šezdeset dvoparametarskih modela koji su korišćeni za aproksimaciju ravnotežne vlažnosti dunje. Analizirani modeli su preuzeti iz refrentne svetske literature. Na osnovu dobijenih rezultatata može se zaključiti da model Popovski & Mitrevski ima najbolje statističke performanse. Glavni kriterijum ocene bio je koeficijent determinacije čija je vrednost za najbolje ocenjeni model bila vrednost od R2 = 0,9913. Vrednosti statističkih parametara modela Popovski & Mitrevski procenjene su slaganjem modela sa eksperimentalnim podacima ispitivanja ravnotežne vlažnosti dunje korišćenjem Quasi-Newton metod procene koji minimizira greške sume kvadrata.
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.5937/jpea1901001M
objavljen u SCIndeksu: 03.05.2019.

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