Many countries face food consumption and energy source issues. Direct production and consumption control are critical due to various factors. Many studies advocate food preservation as a crucial means to reduce post-harvest crop losses, with drying being a prominent method. By using Transys software, the annual performance of tomato drying inside the greenhouse Dryer was evaluated under Karbala, Iraq’s conditions during months (October2023, November2023) to ascertain drying outcomes The experiments were conducted at air mass flow rate of 10.26 kg/hr. and a thickness of 10 mm for three different conditions. The first condition involved no phase change material usage, while the second condition utilized a basin made of aluminum containing phase change material. As for the third condition, the basin was left empty to test the thermal storage of aluminum. In addition to two other experiments each of with a different velocity’s applied (13.68, 17.1) kg/hr. without the use of a phase change material and the basin containing the aluminum, in order to compare the best air mass flow rate for the drying process. The use of paraffin wax aims to enhance the drying efficiency, leading to an increase in the temperature of the device. Consequently, this enhances the drying efficiency and prolongs the drying time.