2 ▁G J ▁come ▁from ▁the ▁suc rose ▁and ▁ 2 . 5 ▁from ▁the ▁bag asse . ▁Per ▁hect are ▁per ▁year , ▁the ▁bi om ass ▁produced ▁corresponds ▁to ▁ 0 . 2 7 ▁T J . ▁This ▁is ▁equivalent ▁to ▁ 0 . 8 6 ▁W ▁per ▁square ▁meter . ▁Assuming ▁an ▁average ▁ins olation ▁of ▁ 2 2 5 ▁W ▁per ▁square ▁meter , ▁the ▁photos yn th etic ▁efficiency ▁of ▁sugar ▁can e ▁is ▁ 0 . 3 8 %. ▁The ▁ 1 3 5 ▁kg ▁of ▁suc rose ▁found ▁in ▁ 1 ▁ton ▁of ▁b & c ▁are ▁transformed ▁into ▁ 7 0 ▁lit res ▁of ▁eth an ol ▁with ▁a ▁comb ust ion ▁energy ▁of ▁ 1 . 7 ▁G J . ▁The ▁practical ▁suc rose - eth an ol ▁conversion ▁efficiency ▁is , ▁therefore , ▁ 7 6 % ▁( compare ▁with ▁the ▁theoretical ▁ 9 7 %). ▁One ▁hect are ▁of ▁sugar ▁can e ▁yields ▁ 4 , 0 0 0 ▁lit res ▁of ▁eth an ol ▁per ▁year ▁( without ▁any ▁additional ▁energy ▁input , ▁because ▁the ▁bag asse ▁produced ▁exceed s ▁the ▁amount ▁needed ▁to ▁dist ill ▁the ▁final ▁product ). ▁This , ▁however , ▁does ▁not ▁include ▁the ▁energy ▁used ▁in ▁till ing , ▁transport ation , ▁and ▁so ▁on . ▁Thus , ▁the ▁solar ▁energy - to - eth an ol ▁conversion ▁efficiency ▁is ▁ 0 . 1 3 %. ▁ ▁Bag asse ▁applications ▁Sug arc ane ▁is ▁a ▁major