Evaluation of energy efficiency of solar roofing using mathematical and experimental research
| Autor: | Tetiana Kovalenko, Ostap Pona, Marta Kuznetsova, Yosyf Mysak, Stepan Shapoval |
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| Rok vydání: | 2017 |
| Předmět: |
Engineering
Mathematics::Dynamical Systems 0211 other engineering and technologies Energy Engineering and Power Technology Mechanical engineering 020101 civil engineering 02 engineering and technology Solar mirror Industrial and Manufacturing Engineering 0201 civil engineering Physics::Fluid Dynamics Solar air conditioning Management of Technology and Innovation 021105 building & construction Astrophysics::Solar and Stellar Astrophysics Electrical and Electronic Engineering business.industry Applied Mathematics Mechanical Engineering Nanofluids in solar collectors Photovoltaic system Structural engineering Solar energy Computer Science Applications Photovoltaic thermal hybrid solar collector Control and Systems Engineering Physics::Space Physics Astrophysics::Earth and Planetary Astrophysics Passive solar building design business Solar shingle |
| Zdroj: | Eastern-European Journal of Enterprise Technologies. 3:26-32 |
| ISSN: | 1729-4061 1729-3774 |
| DOI: | 10.15587/1729-4061.2017.103853 |
| Popis: | A relevant issue today is the principle of energy efficiency and rational use of energy resources. At present, solar heating systems with conventional solar collectors are quite expensive. Given this, we designed and patented a solar roofing, which combines the functions of a solar collector and a metal corrugated part of the pitched roof. The feature of solar roofing is that its heat absorber is made of the corrugated roofing material of the building. This makes it possible to significantly reduce the cost of the solar system, improve its strength and simplify the design. Comprehensive solution of the issues of fixing solar collectors directly to the elements of the roof has broad prospects because, in this case, the possibility of replacing a part of the roof with them can be implemented. This eliminates additional load on the carrying structures and reduces the cost of solar heating in general. We developed a mathematical model of the work of a solar roofing in the heating system, which is a dependence of calculation of heating temperature of the heat carrier in the tank-accumulator on intensity of the heat flow and period of radiation. It was established that at changing incident angles of the heat flow from 90 o to 30 o , effectiveness of solar roofing reduces insignificantly compared with the flat solar collectors. We improved dependences of change in the efficiency of solar heating systems using a solar roofing on the direction and velocity of the air flow. It is established that energy efficiency of a solar roofing is larger affected by velocity of air flow, while its direction is less important. |
| Databáze: | OpenAIRE |
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