The energy and exergy analyses of greenhouse under passive mode for fish drying are presented in [22]. Energy analysis was used to predict the fish surface temperature, greenhouse room temperature and moisture evaporated during drying. The predicted value is validated by the experimental values and its coefficient of correlation varies from 0.94–0.99. The thin layer drying kinetics of Amaranthus cruentus grain occurred in the solar tent dryer under passive mode [23]. The drying rack is inside the dryer having two rackstop and bottom. The drying time of the product was 7 h and at the end, the moisture content was 7% (dry basis). Temperature inside the tent dryer varies from 31.2–54.7 1C and its relative humidity ranges from 22–34%. The quality of tent