## 5 Results and Discussion
To increase the speed of the DW, the DW's control input voltage was increased by the controller after the 800 th second and was reduced to approximately 22.5 V. Thus, it was ensured that the room relative humidity reached the second set value in a short time. Similar to the fans, 0 V is sent in the DW during the automatic OFF process to stop it. Then, when the cooler was ON again, the DW was started to provide the deteriorated relative humidity balance in the room, and the dehumidification process was started. The rotational speed of the DW is shown in Figure 4c. It is shown that the rotational speed of the desiccant wheel was determined at 4400 rad/sec to reach the first set point and 5300 rad/sec to reach the second set point. After that, the powers and the energies consumed by the actuators depending on the actuator voltage values determined by the control strategy according to the ambient and process conditions were analyzed. The speed of the fans and the power consumed by the fans during operation vary depending on the control input voltage determined by the controller. Figure 4: (**a**) The rotational speed of fans. (**b**) The operation modes of the desiccant wheel. (**c**) The rotational speed of the desiccant wheel. Figure 5 shows the variation of fan power and energy consumption of a fan as a function of time, respectively. It can be seen that the power consumed by the fan varies similarly with the supply voltage. Figure 5b shows the variation of the energy consumed by a fan during the operation concerning time. As can be seen from the figure, the energy consumption of the fan increases from the time the fans start to work until the automatic stop occurs. With the decrease of the set value in the 800 th second, the power consumed decreases due to the slowing down of the fans. Depending on the decrease in power, the energy consumed by the fan decreases at a certain time. As seen in the graph, the slope of the increase in energy changes after the 800 th second. The total energy consumed during the active control mode of the cooler is observed as 39 KJ. Between the 1650 th seconds and the 2100 th seconds when the cooler is OFF, the consumption remains constant at 39 KJ. Afterward, the energy consumption continues to increase as the fans restart and the energy consumption reaches 45 KJ for a fan at the end of 2500 th seconds. Approximately 60% less energy is consumed compared to conventional ON/OFF control, in which the fans are supplied with maximum voltage (20 V) while the cooler is running. In addition, 19.65% energy savings were achieved by consuming 45 KJ instead of 56 KJ with the automatic Stop/Run feature added to the control strategy. The operation of the desiccant wheel is as important as the fans in the calculation of the total energy consumed by the cooler during the cooling process. Similar to the fans, consumed power and energy analyses were made for the desiccant wheel. Figure 6a shows the variation of the desiccant wheel's power as a function of time for this case. It has similar behavior to the control input and rotational speed. Figure 5: (**a**) The power consumption of a fan. (**b**) The energy consumption of a fan. Figure 6b shows the variation of the energy consumed by the desiccant wheel during the operation concerning time. As seen in the figure, the energy consumption increases from the time the desiccant wheel starts to work until the automatic stop occurs. With the decrease of the set value in the 800 th second, the power consumed increases depending on the acceleration of the desiccant wheel. Depending on the increase in power, the energy consumed by the desiccant wheel increases at a certain time. For this reason, the slope of the increase in energy increases after the 800 th second. During the active control mode of the cooler, the total energy consumed by the desiccant wheel is observed to be approximately 820 KJ. Between the 1650 th second and the 2100 th second when the cooler is OFF, the consumption remains constant at 820 KJ.