Efficiency Assessment of an Evacuated U-Tube Solar Collector Using Silver Nanofluid

被引：24

作者：

Kaya, Huseyin ^{[1
]}

Eltugral, Nurettin ^{[2
]}

Kurukavak, Ali ^{[3
]}

Arslan, Kamil ^{[4
]}

机构：

[1] Bartin Univ, Dept Mech Engn, TR-74100 Bartin, Turkey

[2] Karabuk Univ, Dept Met & Mat Engn, TR-78050 Karabuk, Turkey

[3] Karabuk Univ, Grad Sch Nat & Appl Sci, Dept Mech Engn, TR-78050 Karabuk, Turkey

[4] Karabuk Univ, Dept Mech Engn, Dept Mech Engn, TR-78050 Karabuk, Turkey

来源：

JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME | 2019年 / 141卷 / 06期

关键词：

solar energy; evacuated tube solar collector; thermal performance; silver nanofluid; efficiency; solar; THERMAL PERFORMANCE ENHANCEMENT; FLAT-PLATE; NANOPARTICLES; WATER; GLASS; FABRICATION; AL2O3; SIZE;

D O I：

10.1115/1.4044881

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A water-based silver nanofluid (Ag/PW) was prepared from gelatin-stabilized silver nanoparticles (Ag NPs) of about 15 nm and further used as a working fluid in an evacuated U-tube solar collector (EUSC) to investigate the variation in the collector efficiency. An Ag/PW nanofluid having 0.035 wt% was prepared and demonstrated a good promise of colloidal stability when dispersed in pure water. Collector efficiency measurements were carried out at outdoor conditions with four different mass flow rate values (0.063, 0.051, 0.033, and 0.02 kg/s). Results showed that Ag/PW have superior heat transfer properties than that of pure water as the base fluid. It was found that the efficiency of the collector was directly proportional to the mass flow rate of the working fluid until an optimum value was attained. Experimental results show that the highest collector efficiency was 72.2% at 0.051 kg/s mass flow rate, which is 21.3% higher than that of the pure water.

引用

页数：10

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