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2007, vol. 32, iss. 2, pp. 61-70
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Influence of greenhouse covering material on energy consumption
Uticaj pokrivnog materijala na potrošnju energije u objektima zaštićenog prostora tunel tipa
University of Belgrade, Faculty of Agriculture, Serbia
Project: Projekat Ministarstva nauke Republike Srbije, br. TP 6918.A: Optimalna tehnološko tehnička rešenja za tržišno orijentisanu biljnu proizvodnju
Abstract
Greenhouse production in Serbia region is, in most cases, carried out in tunnel structures covered with single or double PE folia. Reason for this is greenhouse coverings and structures market which is pretty much uniform with tunnel structures offers to the growers. Growers enter this sophisticated plant production system with lack of information about energy efficiency as well as economical aspect of purchasing specific structure. Main problem with greenhouse production comes with winter production, when heating is needed. In this period coverings and structures show their quality. Aim of this paper is analysis of lettuce winter greenhouse production in tunnel structures using direct/indirect energy input analysis. Result show that tunnel structures covered with single PE folia and with smaller specific volume per meter of length.
Sažetak
Proizvodnja u zaštićenom prostoru se, u Srbiji, dominantno odvija u objektima tunel tipa pokrivenim jednostrukom ili dvostrukom folijom. Razlog tome je samo tržište pokrivnih materijala i konstrukcije koje nudi gotova tehnička rešenja poluvisokih i visokih tunela, sada već ustaljenih dimenzija. Proizvođači ulaze u ovaj sistem sofisticirane biljne proizvodnje sa nedovoljno informacija o energetskoj efikasnosti a samim tim i ekonomskoj opravdanosti ulaganja u određeni tip objekta. Najveći problem kod proizvodnje u zaštićenom prostoru je proizvodnja izvan sezone tj. u zimskom periodu. Tada karakteristike materijala i konstrukcije pokazuju sve svoje prednosti i nedostatke. Cilj istraživanja je utvrđivanje energetske efikasnosti proizvodnje zelene salate u zaštićenom prostoru preko energetskih inputa varijanti tehnološko-tehničkih proizvodnih sistema za objekte tunel tipa pokrivene jednostrukom i dvostrukom folijom. Rezultati ukazuju da najvišu specifičnu potrošnju energije imaju objekti tunel tipa pokriveni jednostrukom folijom sa najmanjom proizvodnom površinom a da viši stepen iskorišćenja energije imaju tuneli veće specifične zapremine po jedinici dužine, pokriveni dvostrukom folijom.
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