Technical Brief

Experimental Study of the Influence of Light Intensity on Solar Organic Rankine Cycle Power Generation System

[+] Author and Article Information
Yuping Wang

Key Laboratory of Power Machinery and Engineering,
Ministry of Education,
Shanghai Jiao Tong University,
800 DongChuan RD,
Minhang District,
Shanghai 200240, China
e-mail: linerw@sjtu.edu.cn

Lei Tang

Key Laboratory of Power Machinery and Engineering,
Ministry of Education,
Shanghai Jiao Tong University,
800 DongChuan RD,
Minhang District,
Shanghai 200240, China
e-mail: tangleisjtu@163.com

Yiwu Weng

Key Laboratory of Power Machinery and Engineering,
Ministry of Education,
Shanghai Jiao Tong University,
800 DongChuan RD,
Minhang District,
Shanghai 200240, China
e-mail: ywweng@sjtu.edu.cn

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received August 17, 2015; final manuscript received May 3, 2016; published online May 25, 2016. Assoc. Editor: Mary Jane Hale.

J. Sol. Energy Eng 138(4), 044502 (May 25, 2016) (5 pages) Paper No: SOL-15-1265; doi: 10.1115/1.4033593 History: Received August 17, 2015; Revised May 03, 2016

A low-temperature (<120 °C) solar organic Rankine cycle (ORC) power generation experimental facility is designed and built. The influence of light intensity on the system performance is investigated using the experimental facility. The results indicate that the system efficiency can reach 2.2%. The temperature of heat transfer fluid (HTF) decreases linearly with light intensity (I). However, both system efficiency and thermoelectric efficiency first decrease linearly and then drop sharply as I decreases at working fluid flow rates (Vwf) of 200 and 160 L/hr, while they only decrease slightly with I at Vwf of 120 L/hr. The light intensity of the turning point is 824 W/m2 at Vwf of 200 L/hr, which corresponds to an HTF temperature of 75 °C. In addition, it is found that the influence of light intensity on the performance of ORC becomes stronger for higher working fluid flow rate. Moreover, the light intensity and HTF temperature at the turning point increase with working fluid flow rate. The experimental results are of great significance for the design and operation of low-temperature solar ORC power generation system.

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Grahic Jump Location
Fig. 1

Schematic diagram of the solar ORC power generation experimental facility

Grahic Jump Location
Fig. 2

Photographs of (a) solar collector and (b) ORC

Grahic Jump Location
Fig. 3

Variation of HTF temperature (T5) with light intensity (I)

Grahic Jump Location
Fig. 4

(a) Variation of power (Pe) with T5, (b) variation of thermoelectric efficiency (ηthermoelectric) with T5, (c) variation of expander speed (n) with T5, and (d) variation of expansion ratio (β) with T5

Grahic Jump Location
Fig. 5

Variations of system efficiency (ηsystem), thermoelectric efficiency (ηthermoelectric), and collector efficiency (ηcollector) withI



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