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Performance evaluation of a helix tube solar collector system
Author(s) -
Boonchom Kritsada,
Vorasingha Anusorn,
Ketjoy Nipon,
Souvakon Chaluay,
Bongkarn Theerachai
Publication year - 2007
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.1327
Subject(s) - tube (container) , helix (gastropod) , absorbance , materials science , heat transfer , composite material , optics , analytical chemistry (journal) , chemistry , physics , mechanics , geology , chromatography , paleontology , snail
In this paper we evaluated the performance of a helix tube solar collector. This helix tube collector increases the absorbed radiation of diffuse and ground reflection. The inner and outer diameters of the helix tube are 8 and 12 mm, respectively. The helix tube was designed as a copper tube which is coated with a nanocarbon composite. A cylindrical glass, length 1.2 m, outer diameter 1.397 × 10 −1 m and thickness 6.4 × 10 −3 m, was used as a cover. The performance of the collector was in Phitsanulok province, Thailand, which is located at latitude 16.783°N with an average wind velocity of 3 m s −1 . Solar absorbance was 0.94 and the IR emission of nanocarbon was 0.15. The heat transfer fluid was Paratherm MG™ oil at 32°C and the oil mass flow rate was 9.5 kg h −1 . These were used to evaluate the performance of the collector. The performance of the helix tube collector and the temperature difference of oil (inlet and outlet) were 50.32% and 47.43°C, respectively. Copyright © 2007 John Wiley & Sons, Ltd.