## 4 Conclusions  
The inclusion of an adsorption module into a solar DWH system is an effective way to improve its performance. Although such systems are usually developed and optimized to operate under certain specific conditions, they can effectively operate in different locations, provided that the installation conditions are suitably adapted. In this case, the easiest installation parameter that can be changed is the solar collector's inclination angle. Thus, the best solar collector's inclination angle for each location and how the system performs when operating under each location particular conditions remain to be determined. A solar DWH system previously optimized to operate in the Portuguese conditions was analyzed when installed and operated in seven different locations around the world, representative of the locations with similar latitudes and climatic conditions, and its performance was evaluated by numerical simulation. For each particular location, the best solar collector's inclination was assessed. The results indicated that the best solar collector's inclination angle is not the local latitude and that some deviation must be considered for better performances. It was observed that, in general, the best performances were obtained for the solar collector's inclination angles larger than the local latitude. This favors the system's operation under winter conditions, when heating needs are higher. However, for low latitudes, the solar collector's inclination angle deviation relative to the latitude is not so relevant. Locations with less available solar radiation require higher yearly energy consumptions of the backup water heater, but present also higher \(\mathrm{Q_{saving}}\), thus indicating that the system with an adsorption module operates with a higher performance there. It should also be retained that, for the warmer locations with low latitudes, care must be taken when assessing the system's performance improvement associated to the use of the adsorption module only in terms of the percentual increase of \(\mathrm{Q_{saving}}\). This percentual increase can be relatively high for these locations, even if the absolute value of this reduction is in fact low. However, it is the absolute value of the obtained energy consumption reduction that is relevant to investment decisions. These results allow for a deeper understanding on the system's performance under different local installation and operating conditions by considering a limited number of representative locations. The results can thus serve as a starting point for further studies aiming to extend this work to other locations, in order to statistically assess the system's performance throughout the world. In this line, if the system configuration is altered (as opposed to the present assumption of \"as is\" system), further studies are required to properly evaluate the optimal system configuration for each location. The performance dataset of a solar DHW system with an adsorption module operating in seven world locations and respective climate data are available online at URL [[https://doi.org/10.6084/m9.figshare.10048961](https://doi.org/10.6084/m9.figshare.10048961)]([https://doi.org/10.6084/m9.figshare.10048961](https://doi.org/10.6084/m9.figshare.10048961)), hosted at Figshare [22]. Conceptualization, V.A.F.C., M.S.F., J.J.C., and A.R.G. ; methodology, M.S.F. and G.J.V.N.B. ; software, M.S.F. ; formal analysis, M.S.F. and G.J.V.N.B. ; investigation, M.S.F. ; writing of the original draft preparation, M.S.F. ; writing of review and editing, M.S.F., V.A.F.C., J.J.C., A.R.G., and G.J.V.N.B. ; visualization, M.S.F. ; supervision, V.A.F.C. ; project administration, V.A.F.C., J.J.C., and A.R.G. ; funding acquisition, A.R.G. and V.A.F.C.