Thank you Abdulfatah Abdu Yusuf for your response, but actually I need to use one type of solar systems (water heater with air heater or desalination) in a compact way.

Dear Dr. Abdulfatah Abdu Yusuf ,

I get and read the first article before, but I dont have excess to the second one. If you can get it and send it to me I will be very grateful to you.

https://www.sciencedirect.com/science/article/pii/S0038092X00001584

Many thanks

Thanks alot Dr. Abdulfatah Abdu Yusuf

It depends on some factors such as design of the swh, architecture, utility, cost, etc

you can use the PV/T concentrated solar system. See the attached file

For obtaining good electrical and thermal energy yields u can use the concentrated PV/T Solar system.

Thank you Dr. Naseer K. Kasim.

The PV/T system with concentrating and tracking leads to about double of output power in hot environments.