Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 145, Issue 6, Pages 2873-2889Publisher
SPRINGER
DOI: 10.1007/s10973-020-09953-9
Keywords
Solar energy; Solar collectors; Evacuated tubes; Heat pipes; Thermal efficiency
Funding
- University of Sharjah [18020406118]
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The evacuated tube solar collector is a suitable solar technology for producing useful heat in various climate conditions. Design parameters such as tracking system, collector design, mass flow rate, optical design, and working fluid play crucial roles in influencing the performance of the collector.
Since the last decades, solar energy has been used worldwide to overcome foreign dependency on crude oil and to control the pollution due to a limited source of non-renewable energy. Evacuated tube solar collectors are the most suitable solar technology for producing useful heat in both low and medium temperature levels. Evacuated tube solar collector is capable of working in hot, mild, cloudy or cold climates where flat plate collector is not an option. The objective of this review paper is the detailed investigation of evacuated tube solar collectors having heat pipe and direct flow are reviewed. All the design parameters which influence the collector performance are investigated and discussed in this work. More specifically, the tracking system, the collector design, the mass flow rate, the optical design and the kind of the working fluid are the main studied parameters. Moreover, this work focuses on the latest developments and advances, providing a review of experimental and numerical studies reported. Lastly, this work presents the future ideas that can be carried out to improve the performance of evacuated tube solar collectors.
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