Development of a low cost nanofluid based direct absorption solar collector

Sreehari Sreekumar, Albin Joseph, Shijo Thomas

Research output: Contribution to journalConference articlepeer-review

15 Citations (Scopus)


In this work experimental investigation on a parabolic trough direct absorption solar collector (PTDASC) working with a cost
effective carbon soot based nanofluid is performed. DASC employs absorption of solar radiation directly by the fluid instead of
the solid surface. The main components of the PTDASC are the glass-glass receiver tube and nanofluid. Carbon soot synthesized
cheaply by incomplete combustion of inorganic materials like candle, paraffin and oxygen-acetylene was dispersed in DI water to
form carbon soot nanofluid. The mass fraction of carbon soot/water nanofluid selected for testing in PTDASC was 0.2 %. Solar
weighted absorption fraction measured by UV-Vis spectrophotometer indicated that 70% of the incident energy can be absorbed
by carbon soot nanofluid. The maximum thermal efficiency of the collector was found to be 50 % for nanofluid and 12.4 % for
base fluid. The carbon soot nanofluid based on candle soot exhibited excellent volumetric absorption property.
Original languageEnglish
Pages (from-to)2424-2430
Number of pages7
JournalMaterials Today: Proceedings
Publication statusPublished (in print/issue) - 4 May 2020
Event2nd International Conference on Materials Manufacturing and Modelling - VIT University, Vellore, India
Duration: 29 Mar 201931 Mar 2019
Conference number: 2019


  • Carbon soot nanofluid
  • direct absorption
  • parabolic trough collector
  • solar weighted absorption


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