Entropy generation rate analysis of a thermosyphon heat exchanger for cooling a telecommunication base station Online publication date: Fri, 17-Mar-2017
by Feng Zhou; Guoyuan Ma; Shuchun Wang
International Journal of Exergy (IJEX), Vol. 22, No. 2, 2017
Abstract: Energy consumption can be reduced effectively if ambient energy is used to cool the telecommunication base station. A thermosyphon heat exchanger was adopted as a promising technique to utilise ambient energy. A prototype was developed, and the experimental system was constructed. Relations between dimensionless entropy generation rate, heat transfer rate and energy efficiency ratio of the thermosyphon heat exchanger were discussed theoretically and experimentally. Ambient temperature and facing air velocity were also examined. Results indicated that dimensionless entropy generation rate decreased by 8-9% when temperature difference increased by 3°C and increased by 8% when the ambient temperature increased by 3°C. The errors were in the range of 5.7-14.2%. When the facing air velocity increased from 2 m/s to 3.5 m/s, the test dimensionless entropy generation rate increased from 0.4 to 0.53 and the errors were 0.53-9.56%. Simulation and test results showed similar trends under different working conditions.
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