## 3 Results and Discussions
Similarly, on 31 August and 4 September there was a change compared to the minimum flow value of \(O_{2}\) in Bremen and Beijing, respectively; it went from \(7.50\times 10^{-5}\) mol/s to \(1.29\times 10^{-3}\) mol/s for Bremen and from \(7.50\times 10^{-5}\) mol/s to \(1.70\times 10^{-3}\) mol/s for Beijing. In the case of Puerto Bolivar, the increase of the minimum molar flow value of \(O_{2}\) occurred on 7 October and went from \(7.50\times 10^{-5}\) mol/s to \(1.70\times 10^{-5}\) mol/s. Figure 8: Flow for charge profile 1 for (**a**) \(\mathrm{O_{2}}\) and (**b**) \(\mathrm{H_{2}}\). As for the flow of \(H_{2}\), in Figure 9b it can be seen that for the case of Texas, on day 220 the first increase in molar flow was presented, going from \(7.50\times 10^{-5}\) mol/s a \(1.26\times 10^{-3}\) mol/s. In the case of Bremen and Beijing, the first increases occurred on 3 September and 6 September, respectively; going from \(7.50\times 10^{-5}\) mol/s to \(7.77\times 10^{-4}\) mol/s for the Bremen and from \(7.50\times 10^{-5}\) mol/s to \(3.00\times 10^{-3}\) mol/s for Beijing. On the other hand, in Puerto Bolivar, this increase in molar flow did not occur until 8 October, from \(7.50\times 10^{-5}\) mol/s a \(1.10\times 10^{-4}\) mol/s. The variations in the intensities of solar radiation and wind speed that motivate these variations in the molar flows of \(H_{2}\) and \(O_{2}\) change the amount of power generated by each of the sources. These combinations are variable for each of the geographical areas analyzed, as well as for each load profile. These powers were analyzed for each of the areas studied. Figure 10 shows the power generated by the system for Puerto Bolivar (Colombia) for the demanded load profile 1. Figure 10 highlights what happened between 19 July and 7 September, days on which the generated power exceeded the power demand stipulated in the load profile. This was due to above-average winds and a slight increase in average solar radiation added to the low demand at this time of year, which led to the observed overshoot. Similarly, Figure 11 shows the power generated by the system in Beijing (China) for load profile 1. As in the previous case, increases in solar radiation and wind speed and a decrease in load demand coincide. This point is relevant due to the fact that the excess in the demanded charge was maintained from 19 July to 7 September, unlike the cases that occured on the previous days, which were only daily  
Figure 10: Power in Puerto Bolivar (Colombia). Figure 9: Flow for charge profile 2 for (**a**) O\({}_{2}\) and (**b**) H\({}_{2}\). peaks in wind speed. This figure also shows the influence of the solar radiation peak highlighted in Figure 6; this increase in radiation occurred at the time of year when the load demand for the simulation was higher, so the system needed the PEM fuel cell operation to achieve the load demand. However, the tunning parameters of the control system are responsible for ensuring that the hybrid system follows the energy demand, regardless of the wind or solar resource peaks. Likewise, Figure 12 shows the power generated by the system in Texas (USA) for load profile 1. Figure 11 highlights the last days of January, together with the month of February, in which there was an increase in wind speed, causing a generated power higher than the demanded load profile. The rest of the time, the generation contributed by the solar radiation and the wind was complemented with the contribution of the PEM cell; this contribution is evident in the increase of the flows of \(H_{2}\) and \(O_{2}\) presented in Figure 8a,b. In the case of Bremen (Germany), the results are presented in Figure 13. In Figure 13 it can be seen that in the first 100 days of the year, there were peaks in wind speed, which triggered an increase in the energy generated that exceeded the load profile. This increase was the highest presented in the four locations analyzed and is due to the increase in wind speed presented on those days, which, as in the  
Figure 11: Power in Beijing (China).