Enhancement of convective heat transfer in a parabolic trough collector using vibrations - an introductory numerical analysis

• Autorzy: Grzywnowicz Krzysztof , Bartela Łukasz , Remiorz Leszek , Stanek Bartosz
• Języki publikacji: EN

Abstrakty

EN

Energy generation systems based on renewable energy sources (RES) are rapidly gaining ground in the global power and heatmarket. Most of these systems are well-suited to distributed energy solutions, including distributed heat production. Individual users and local low-power plants can use solar thermal devices for the purpose of providing domestic hot water, heating and cooling. Nevertheless, the variability of solar irradiance can make it difficult to harvest energy efficiently all year round. Therefore, from the point of view of improving the overall, year-averaged operational parameters of a solar thermal device it isparamount to maximize the heat acquired from it at times ofhigh radiation flux. This paper discusses computational research on enhancing convective heat transfer in the absorber of a parabolic trough collector (PTC), through inducing vibrations of an immersed flat plate. The investigation identifies the influence of different amplitudes and frequencies of oscillatory motion on the absorber’s parameters, compares them with the construction of a classical absorber and considers flow turbulization. The results indicate there is only a limited application of vibrations to enhance operational parameters of solar thermal absorbers, with the best results obtained for thermal fluidflows of below 0.1 dms.

Słowa kluczowe

EN

concentrated solar power; parabolic trough collector; heat transfer enhancement; convection intensification

PL

energia słoneczna; paraboliczny kolektor rynnowy; wymiana ciepła; intensyfikacja konwekcji

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2020
• Tom: Vol. 100, nr 4
• Strony: 291--300
• Opis fizyczny: Bibliogr. 42 poz., rys., tab., wykr.

Twórcy

autor

Grzywnowicz Krzysztof

• Silesian University of Technology

autor

Bartela Łukasz

• Silesian University of Technology

autor

Remiorz Leszek

• Silesian University of Technology

autor

Stanek Bartosz

• Silesian University of Technology

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).