Energy Efficiency of the Lettuce Greenhouse Production
Energetski bilans proizvodnje salate u objektima zaštićenog prostora različite konstrukcije
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Author
Dimitrijevic, Aleksandra
Djevic, Milan
Blazin, Slobodan
Blazin, Dragan
Keywords
plastic covered greenhouseslettuce
tunnel
gutter connected structures
multi-span structures
energy
productivity
salata
tunel
blok objekti
energija
energetska produktivnost
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Show full item recordAbstract
In this paper the influence of greenhouse construction on energy efficiency in
winter lettuce production was estimated for different double plastic covered greenhouses
in Serbia region. In order to see whether the greenhouse structure influences energy
consumption, energy inputs were estimated for lettuce production in four different
greenhouse structures (a tunnel and gutter connected structure and three multi-span
greenhouses). On the basis of lettuce production output and the energy input, specific
energy input, energy output-input ratio and energy productivity were estimated. Results
show that the lowest energy consumption was obtained for gutter connected greenhouse
with two bays, 3.11 MJ/m2. The highest energy consumption was multi-span greenhouse
with thirteen bays, 3.30 MJ/m2. The highest value for output-input ratio was calculated
for the multi-span greenhouse with thirteen bays, 0.85 and the lowest for the tunnel
structure, 0.47. Regression equations show the nature of the greenhouse structure
influence on these parameters. U ovom radu analiziran je uticaj konstrukcije objekata zaštićenog prostora na
energetski bilans zimske proizvodnje salate. Utrošak energije praćen je u četiri tipa
objekata zaštićenog prostora i na bazi direktnih i indirektnih energetskih inputa i
energetskog outputa određeni su specifični energetski input, energetski odnos i
energetska produktivnost. Rezultati pokazuju da je najniža potrošnja energije po jedinici
površine ostvarena u blok objektu sa dva bloka, 3,11 MJ/m2, dok je najviša vrednost
utrošene energije zabeležena u blok objektu sa trinaest blokova, 3,30 MJ/m2. Najviši
energetski odnos ostvaren je u blok objektu sa trinaest blokova, 0,85 a najniži u objektu
tunel tipa, 0,47. Jednačine regresije su ukazale na prirodu zavisnosti energetskog bilansa
sistema od izabrane konstrukcije objekta zaštićenog prostora.