Experimental investigation of thermal performance of an evacuated U-Tube solar collector with ZnO/Etylene glycol-pure water nanofluids

Experimental investigation of forced convection of water/EG-Al2O3 nanofluids inside horizontal tube

“…Tap water flowing through the plate heat exchanger (11) cools hot nanofluid. Flow rate of cooling water is controlled by valve (12) and measured by rotameter (13).…”

“…Independent of the volume flow rate of the nanofluid, the maximum efficiency was recorded for nanoparticle mass concentration equal to 0.2%. Kaya et al [12] also carried out the experiment for solar collector. In this case, evacuated U-tube solar collector was used.…”

Experimental Investigations of Energy and Exergy Efficiencies of an Evacuated Tube Solar Collector

“…Flat plate solar collectors are the cheapest and have a simple design, but the problem is that they have a low thermal efficiency and low outlet temperature [2]. Evacuated tube solar collectors have higher efficiency at higher temperatures (above 80 °C) and cold climates, compared to flat plate ones [3][4][5][6]. Thermal performance of solar collectors can be determined by instantaneous or long-term energy efficiency.…”

Entropy generation of zirconia-water nanofluid flow through rectangular micro-channel

“…Nanofluids are prepared with metallic or non-metallic nanoparticle addition to conventional working fluids such as water, ethylene glycol or lubricants to obtain working fluids having better thermophysical properties. Nanofluids can be used as heat transfer fluid in internal combustion engines [3][4][5][6], solar collectors [7][8][9][10][11], building heating and cooling systems [12][13][14], nuclear reactors [15][16][17], electronic components [18][19][20], and many more in practice.…”