Innovative Overheating solution for solar thermal collector using a reflective surface included in the air gap
| Autor: | S.M.K. El Hassar, A. Larabi, P.V. Quiles, F.J. Aguilar, Z. Khan, A. Amiche, Z.A. Khan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
060102 archaeology Renewable Energy Sustainability and the Environment 020209 energy Nuclear engineering 06 humanities and the arts 02 engineering and technology Radiation Glass cover Physics::Space Physics 0202 electrical engineering electronic engineering information engineering 0601 history and archaeology Air gap (plumbing) Overheating (electricity) Solar thermal collector |
| ISSN: | 0960-1481 |
| Popis: | In this work, a new solution to prevent the overheating of solar collectors in the case of stagnation is presented. The solution proposed consists of inserting a reflective sheet inside the solar collector between the absorber and the glass cover to reduce the incoming energy by reflecting solar radiation. This protection is switched ON or OFF according to the absorber temperature. A prototype has been manufactured and tested in outside conditions and in laboratory. The prototype was tested with different percentages of protection. With 50% of protection, the overheating problem is eliminated. A simplified numerical model of the solar collector with the protection was developed and has been validated. The calculated temperature values are very close to the measured data. The experimental and numerical results showed the good behaviour of the proposed solution. |
| Databáze: | OpenAIRE |
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