## 5 Results and Discussion
Afterward, the energy consumption continues to increase with the desiccant wheel restarting. At the end of the 2500 th second, the total energy consumption of the desiccant wheel reaches approximately 1100 KJ. If there was no automatic Stop/Run mode, 1400 KJ of energy would be consumed during the operation of the desiccant wheel, and 21.43% energy savings were achieved with this feature. Compared to the classical ON/OFF control (the desiccant wheel consumes 1754.38 KJ in this control mode), 37.3% energy savings were achieved during the 2350 s of operation of the desiccant wheel with the developed control strategy. In addition to the fan and desiccant wheel, the other equipment that consumes energy in the cooler is the water pump. The working state of the water pump is discussed in the next case. As mentioned before, the water pump has three operating modes. When the cooler is ON, Mode-2 is used to feed water to the channels at a constant and lower flow  
Figure 6: **(a)** The power consumption of the desiccant wheel. (b) The energy consumption of the desiccant wheel. rate. When the cooler is OFF, Mode-3, which is used as flashing mode, is used to clean the channels. In this mode, the high flow rate of water is fed to the channels at certain intervals, and cleaning is provided. The operating performance and energy analysis of the water pump, which consumes energy during operation in Mode-2 and Mode-3. Figure 7 shows the change in room temperature for the process that is manually turned off and the flashing mode turned on, and the change in the operating modes of the water pump during the process. The water pump (Mode-2) that starts running at 75 s starts to consume energy. As seen in the figure, it continues to operate in Mode-2 from this moment until the 2650 th second when the cooler is switched to manual OFF mode. In addition, the water pump continues to run automatically in the 1650 th second when the OFF mode is operating. In the figure on the upper part of Figure 8, the increase in room temperature with disruptive effects can be seen as a result of the manual shutdown at the 2650 th second. As can be seen, the disturbing input effect to which the system is exposed is quite high. Despite these high amplitude disturbance effects, it is concluded that the cooler is a successful controller for the control of temperature and relative humidity in active control mode. After the cooler was closed manually, the flashing mode (Mode-3) of the water pump was activated manually at the 3550 th second. At this stage, high flow rate water is fed to the channels periodically. At 5200 th second, the flashing mode was turned off manually and the water pump was stopped (Mode-1). The control input applied to the water pump by the controller and the energy consumption of the water pump are shown in Figure 8. As can be seen in Figure 8a, the operating voltage for the water pump is determined as 1 V during operation in Mode-2. With this voltage supply, the  
and the operation is stopped. Next, the flashing mode is activated at the 3550 th second and the water pump pumps high flow rate water into the channels for 40 s every 100 s. After the cleaning process is finished, the flashing mode is turned off manually and the water pump is stopped. The cleaning mode of the water pump can only be activated when DPEC is OFF. The variation of the energy consumed by the water pump with respect to time is given in Figure 8b. As can be seen from the figure, in Mode-2, which is a low-speed operating mode, the energy consumption increases with a low slope during operation. The total consumption of the water pump until 2650 th seconds is 3.5 KJ. Since the water pump does not work until the flashing mode is activated, no energy is wasted. In flashing mode, energy consumption increases rapidly as higher flow rate water is pumped in the direction of control input with 5V amplitude. After flashing mode, the energy consumption of the water pump reaches 56 KJ at the end of 6000 th seconds. Figure 8: (**a**) The control input for the water pump.