In this work, we had obtained the results of the energy and exergy analysis of the mint drying
process in an indirect solar drier operating in natural convection and in a discontinuous way (only the
day).
The mint drying samples lasted two days (14 h). The device operates slowly, not exceeding (0.2m/s).
By using the 1 st and 2 2nd principles of thermodynamics, we could consider energy useful received by the
collector and that is really used during drying. We also determined the efficiency of the solar air heater as
well as the energy needed for the drying of mint.
The exergy analysis enabled us to have an estimation of the really supplied energy for drying as well
as losses of exergy. The results obtained seem acceptable to us and in agreement with the results found in
literature. The insufficiencies observed are in our opinion due to low recorded flows, It appears necessary
to repeat these experiments and measures using an air dryer in forced convection.