The coffee drying system that is less efficient with the use of sunlight makes the productivity of coffee farmers in Indonesia less than optimal when the rainy season arrives. In this study, the coffee bean drying process was carried out to make the drying system more effective and efficient by combining a bed dryer-type drying system with a heat pump. The drying air flow used was 550 lpm. Variations in temperature on the evaporator used 10 until 20 °C and without refrigeration. While the electric heating temperatures used are 60 to 80 °C. In addition, this test is also carried out using only electric heaters. The results obtained from this study are the dehumidification process of drying air in the evaporator can improve the drying process of coffee beans. Higher electric heating temperatures will also speed up the drying process. The highest value of activation energy for drying coffee beans on air humidity was 39.6485 kJ/mol at drying conditions without using a refrigeration system and n The lowest activation energy value was obtained at a specific humidity of 0.0079 kg/kg d.a (evaporator temperature 10°C) with a value of 19.9407 kJ/mol. The lower the specific humidity of the drying air, the lower the energy required to evaporate the water in the coffee beans. This activation energy value can then be used as initial data for the numerical simulation of drying coffee beans.