Flat plate solar collector (FPSC) is one of the essential solar devices that can be utilized for heating purposes in either residential or civil buildings. Its mechanism is simple: solar radiation that passes through one or more transparent glasses received by the risers’ surfaces and absorber plate of a FPSC. Concomitant of this period, operating fluid acquires sufficient time to absorb the energy stored in the risers and absorber of the FPSC. As a result, outlet temperature of the operating fluid flows within risers augments. However, in this paper, to conduct a mathematical investigation, a MATLAB code has been developed to illuminate the effect of using two different nanoparticles namely Fe3O4 and MgO suspended within pure base water of a flat plate solar collector (FPSC) from energy and exergy points of view. Results are being presented for two different mass flow rates, and comparisons are being established for various consequential parameters. Considering the attained outcomes, it is found that using Fe3O4/water nanofluids provides higher thermal efficiency and entropy generation rate value, whereas exploitation of MgO/water nanofluids creates the lowest thermal efficiency and entropy generation rate value. Moreover, the highest outlet temperature obtains when Fe3O4/water nanofluids are used.

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