Abstract:
The experiments were carried out in September 2019 in the laboratory of the
Department of Agricultural Engineering at the Al-Bayda city is located in northeastern
Libya, at the top of the Jabal Al-Akhdar summit at the confluence of latitude 21.44 north with
longitude 32.76 east .
The aims Drying some medicinal and aromatic plants ( Sage , Ment , Basil , Rut ) so
that studying moisture content , rate of drying and Calculates the heat energy useful for
heating the air in the oven in order Calculates The thermal efficiency.
So the samples was prepared by Harvesting , Washing to removed dust and measured the
weights of the samples before put in the drying oven . The results showed that the
temperature of the Sage and Basil was relatively high, reaching 70 C0
, the temperature was
Mint 60 C0
, but the mint took a while, due to the amount of water in a mint leaf, and it took
85 minutes.While the Rut used the lowest temperature (50 C
0
) and the least time because the
Rut leaf is weak and does not bear a high degree, the Drying rate of sage is bigger than basil
and Ment ,Rut . The best Drying efficiency for the process of drying the Sage plant 69.4 %
Then the Ment plant 50.7 % , subsequent by the basil plant 47.98 % , the least efficiency on
the drying process of the Rut plant 36.57 %.
