Technical Briefs

Thermal Performance of Two Phase Thermosyphon Flat-Plate Solar Collectors Using Nanofluid

[+] Author and Article Information
Sandesh S. Chougule

Research Scholar
e-mail: sandesh_chougule@yahoo.com

S. K. Sahu

Assistant Professor
ASME Member
e-mail: sksahu@iiti.ac.in
Discipline of Mechanical Engineering,
Indian Institute of Technology,
Indore, Madhya Pradesh 453446, India

Ashok T. Pise

Discipline of Mechanical Engineering,
Government College of Engineering,
Karad, Maharashtra 415124, India
e-mail: ashokpise@yahoo.com

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received June 7, 2012; final manuscript received September 26, 2013; published online October 25, 2013. Editor: Gilles Flamant.

J. Sol. Energy Eng 136(1), 014503 (Oct 25, 2013) (5 pages) Paper No: SOL-12-1150; doi: 10.1115/1.4025591 History: Received June 07, 2012; Revised September 26, 2013

A solar heat pipe collector was designed and fabricated to study its performance of the outdoor test condition. The thermal performance of the wickless heat pipe solar collector was investigated for pure water and nanofluid with varied range of CNT nanofluid concentration (0.15%, 0.45%, 0.60%, and 1% by volume) and various tilt angles (20 deg, 32 deg, 40 deg, 50 deg, and 60 deg). CNT nanoparticles with diameter 10–12 nm and 0.1–10 μm length are used in the present experimental investigation. The optimal value of CNT nanofluid concentration for better performance is obtained from the investigation. The thermal performance of the heat pipe solar collector with CNT nanofluid is compared to that of pure water.

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Grahic Jump Location
Fig. 3

(a) Daily variation of ambient temperature (Ta), inlet temperature (Ti), solar radiations (It) and effect of nanoparticle concentration on outlet temperature (To); (b) effect of concentration of nanoparticle on collector efficiencies

Grahic Jump Location
Fig. 4

Effect of tilt angle on collector instantaneous experimental efficiencies

Grahic Jump Location
Fig. 2

(a) Schematic diagram of solar test facility, (b) thermosyphon solar collector

Grahic Jump Location
Fig. 1

SEM image at magnification of 20,000x of MWCNT particles




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