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AVALIAÇÃO EXPERIMENTAL DE COLETORES SOLARES COM TERMOSSIFÕES BIFÁSICOS
Bruno Jesus , RJ , Brazil
Co-Authors: Bruno Jesus, Newton Leite, Luiz Bevilacqua
Presenter: Bruno Jesus
The purpose of the present work was to investigate the association of two important engineering devices, the two-phase thermosyphon, and the solar collector. A cycle to obtain high vacuum was set up to manufacture the thermosyphons, which were then inserted into evacuated glass tubes to compose the structure of a solar collector prototype. The prototype was put into operation for a period of eight months, and two other solar collectors were tested simultaneously for comparison purposes. These last two were purchased on the market, one of which already came with the thermosyphon while the other worked without this device. Temperature readings were taken at the entrance and exit of the manifold, mains water, and thermal reservoir. The temperature data were analyzed and could be reduced in just two periods of 24 hours since they showed reproducibility of behavior. The amount of stored energy was determined by means of a calorimeter, being considered twenty periods of 24 hours for analysis. The conclusion was that the solar collector that uses the thermosyphon can reach higher temperatures at the outlet of the manifold. However, the thermal reservoir can interfere causing a decrease in the water temperature that is intended for the consumer.
Thermosyphon, Solar Collector, Experimental Study