Investigation of thermal behaviour, pressure drop, and pumping power in a Cu nanofluid-filled solar flat-plate collectorS. Reza Shamshirgaran, Morteza K. Assadi, Hussain H. Al-Kayiem and K.V. SharmaMATEC Web Conf., 131 (2017) 01003DOI: https://doi.org/10.1051/matecconf/201713101003