| Issue |
E3S Web Conf.
Volume 207, 2020
25th Scientific Conference on Power Engineering and Power Machines (PEPM’2020)
|
|
|---|---|---|
| Article Number | 02007 | |
| Number of page(s) | 10 | |
| Section | Renewable Energy and Environmental Protection | |
| DOI | https://doi.org/10.1051/e3sconf/202020702007 | |
| Published online | 18 November 2020 | |
Assessment of the annual performance of solar collectors by means of the utilizability method
Technical University Sofia, Department of Heating and Refrigeration Engineering, 1000 Sofia, Bulgaria
* Corresponding author: mzlat@tu-sofia.bg
This report presents some results from a comparative analysis of the long-term efficiency of flat-plate and evacuated tube solar collectors under different operating conditions. The analysis involves calculation of the daily utilizibility factor, which is defined as the fraction of total monthly solar radiation over an inclined surface that exceeds the critical value. The monthly values of the critical radiation and the daily utilizability factor for the solar collectors are determined under different climatic conditions and different temperatures of the heat transfer fluid. The obtained results are used to compare the annual performance of the solar collectors.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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