Performance of copper oxide/distilled water nanofluid in evacuated tube solar collector (ETSC) water heater with internal coil under thermosyphon system circulations by Ghaderian, J., Sidik, N. A. C., Kasaeian, A., Ghaderian, S., Okhovat, A., Pakzadeh, A., Samion, S., Yahya, W. J.