## 4 Results and Discussion
Readers interested in this subject matter are advised to consult these references. From the end user point of view, the most important parameter is the transfer of the thermal energy to the storage tank to be used for domestic or industrial use. Thus, Figure 13 is presented to show the impact of the magnetic field on the heat transfer into the storage tank. It appeared from the results obtained at solar radiation of 750 \(\mathrm{w/m^{2}}\) and Al\({}_{2}\)O\({}_{3}\) nanofluid at a concentration of 5% that the higher the Gauss magnetic intensity, the higher the thermal energy transferred to the storage tank. Additionally, the results showed that the higher the heat transport nanofluid temperature, the higher the thermal energy  
Figure 2:0 Thermal energy in the hybrid system generated by PV-Th solar panels with different magnetic fields. transferred to the storage tank. Therefore, as per Figures 11 and 12, we can deduce that the higher the nanofluid concentration and the higher the magnetic field, the higher the thermal energy transferred to the storage tank and the higher the hybrid system's efficiency. This is an important finding to help the designer of such a solar system properly size the hybrid system in question. Another angle of this study is to analyze the dynamic development of the storage tank temperature under the increase in the magnetic field, thus Figures 13-15 have been plotted to illustrate that increasing the magnetic field resulted in increasing the temperature of the water in the storage tank. In particular, Figure 14 shows the dynamic temperature-time history. However, Figure 15 demonstrates that the higher the heat transport fluid temperature, the higher the storage tank temperature. The findings in the aforementioned figure are an extremely useful tool to predict the storage tank characteristics when the heat transport nanofluid is subjected to a magnetic field. Figure 2:1 Thermal efficiency of the hybrid system generated by PV-Th solar panels with different magnetic fields. Figure 2:2 Thermal energy generated in thermal tank by PV-Th solar panels. To study the impact of the different solar radiations on the performance of Al\({}_{2}\)O\({}_{3}\) nanofluids at a concentration of 5% and magnetic field of 3000 Gauss on the PV-Th solar panels, Figures 16-20 were constructed and compared with water-based heat transport fluid. The results showed that higher solar radiation increased the thermal energy absorbed and the more heat released to the storage tank, the higher the hybrid system efficiency. In particular, Figure 18 shows that higher solar radiations resulted in higher heat load in the heat pipe evaporator that also, in turn, enhanced the pipe thermal energy efficiency generated by PV-Th solar panels with different solar radiations. Additionally, Figure 20 demonstrates that higher solar radiation resulted in higher water temperature in the storage tank which is a result of the increase in the thermal energy in the heat pipe condenser section. It is important to note that similar observations were found at the other different concentrations of the Al\({}_{2}\)O\({}_{3}\) nanofluid. Figure 2:3 The dynamic temperature profile in the storage tank induced by PV-Th solar panels with different magnetic fields. Figure 2:4 The temperature profile in the storage tank induced by PV-Th solar panels with different magnetic fields and nanofluid temperatures. \"It is believed that the increase in radiative forcing resulted in higher solar PV panel surface temperatures and an increase in the water-holding thermal capacity that, in turn, increased the thermal energy transferred to the heat transport nanofluid and the hybrid system efficiency. This was interpreted by [PERSON] [31] and others that as temperature increases, both the number of free electrons and lattice vibrations increase. Additionally, the fluid molecules' spatial velocity increased at higher temperatures, thus, heat is transferred through the material at a higher rate.