Experimental study of carbon nano tube/oil nanofluid in dish concentrator using a cylindrical cavity receiver: Outdoor tests

被引：76

作者：

Loni, R. ^{[1
]}

Asli-Ardeh, E. Askari ^{[1
]}

Ghobadian, B. ^{[2
]}

Kasaeian, A. ^{[3
]}

机构：

[1] Univ Mohaghegh Ardabili, Dept Mech Biosyst Engn, Ardebil, Iran

[2] Tarbiat Modares Univ, Dept Mech Biosyst Engn, Tehran, Iran

[3] Univ Tehran, Fac New Sci & Technol, Tehran, Iran

来源：

ENERGY CONVERSION AND MANAGEMENT | 2018年 / 165卷

基金：

美国国家科学基金会;

关键词：

Solar dish collector; Cylindrical cavity receiver; Energy analysis; MWCNT/oil nanofluid; ORGANIC RANKINE-CYCLE; TUBULAR SOLAR RECEIVER; THERMAL PERFORMANCE; PARABOLIC DISH; THERMODYNAMIC ANALYSIS; EXERGY PERFORMANCE; POWER-GENERATION; HEAT-LOSSES; EFFICIENCY; SYSTEM;

D O I：

10.1016/j.enconman.2018.03.079

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The application of nanofluids is accounted as an effective way for improving the thermal performance of solar systems. In the current study, MWCNT/thermal oil nanofluid was experimentally tested as a solar heat transfer fluid. A dish collector, using a wounded cylindrical cavity receiver, was considered as the solar system. The main aim of this work was the experimental investigation of the cylindrical cavity's performance, using MWCNT/thermal oil nanofluid. Two experimental models were suggested for the prediction of the cavity's thermal efficiency, by considering MWCNT/thermal oil nanofluid and pure thermal oil in the steady-state period. It was indicated that the heat loss coefficient of the cylindrical cavity receiver decreased by the application of nano fluid. The results revealed the average thermal efficiencies of 63.9% and 56.44% for MWCNT/thermal oil nanofluid and pure thermal oil, respectively. The thermal efficiency was changed form 60.04% to 64.76%, by using the nanofluid, in the steady-state period. Also, it was observed that the thermal performance of the cavity receiver was improved by 13.12%, by using MWCNT/thermal oil nanofluid. Based on the obtained results, the application of MWCNT/oil nanofluid is recommended in the solar dish concentrators with cavity receiver.

引用

页码：593 / 601

页数：9

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