An Experimental Investigation on performance of MWCNT-water nanofluid in a flat plate solar water heater under natural and forced circulations

Subject Areas : Nano

kourosh hasanzade ¹ , Amid Khosrowdad ²

1 - student
2 - Associate professor

Received: 2016-01-02 Accepted : 2016-02-23 Published : 2017-02-19

Keywords: Nanofluid, Solar water heater, Flat plate collector, MWCNT Nano particles, Solid valume fraction,

Abstract :

Nowadays, in order to heating water in low-temperature residential applications, flat plate solar water heater is widely used. In this paper, we aim to discuss the thermal performance of MWCNT-water nanofluid in a flat plate solar water heater. The nanofluid has been prepared in solid volume fraction of 0.05% and its thermal performance has been experimentally investigated. In order to make a dispersed and stable nanofluid, Sodium Dodecyl Benzene Sulfonate surfactant has been used. The results showed that using the nanofluid has a considerable effect on improvement of the performance of the flat plate solar water heater. Furthermore, the increase of the system’s performance under natural circulation is much higher than that of forced circulation.