I am in a region where there is high solar radiation and I wish I could design and construct something that will harvest and use the energy for domestic use and will also serve as my thesis work.
For thermal mode; It could be heating domestic water, heating swimming pools, or, employ a compression cycle for cooling. For PV mode, you may think lighting or pumping water, ,,,, These could cover, designing, performance evaluation and enhancing, economical studies, applying combined cycles, ...
According to your replay by considering your climate as a hot climate , you can focus on the application of Ground Source Heat Pump supported by solar energy for Airconditioning Application if u have a good potential for GSHP in your country.