EXPERIMENTAL EVALUATION OF A TEST CELL WITH TEMPERATURE CONTROLLED BY PASSIVE TWO-PHASE THERMOSYPHONS THROUGH ANALOGIES
DOI:
https://doi.org/10.46421/encac.v17i1.3763Keywords:
Test cell, Two-phase thermosiphon, Passive cooling, Bioclimatic strategyAbstract
The present work aims to experimentally evaluate, based on a pilot study, the potential of incorporating two-phase thermosyphons as a strategy for cooling indoor environments. For this, a test cell integrated with a copper coil was used, which simulated the evaporator section of a two-phase thermosiphon. The coil temperature was maintained prescribed and uniform along its length by a temperature-controlled bath. In general sense, in situations where the temperature difference between the coil and the test cell was equal to or less than 7°C, is was hard to operate the thermosyphon, requiring an increase in the heat transfer area. The device managed to significantly reduce the temperature of the indoor air, with much of the heat being extracted in the first two hours of the test, especially in the initial 60 minutes. In addition, the internal air temperature distribution for, all the tests, showed to have a large temperature level at the quadrants of the cell. Regarding the experimental bench operation, it is advisable that the tests are carried out with an interval between them of at least 48 hours, in order to avoid an accumulation of energy in the walls.
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