Abstract
An experimental setup for indirect contact sensible heat TES was built. Air was chosen as the heat transfer fluid to flow inside the tubes and carry heat, while the mixture in the tank contacts the outside of the tubes. The results were also compared with pure sand filler material. It can be found that and the TES efficiency of mixture increased by 18% compared with pure sand, what’s more, its temperature gradient along the radical direction was also lower, while its temperature gradient along the axial direction was higher, so the mixture was better. Under various air inlet temperature (60-70°C), TES performances were similar, but for real power generation, further work on optimism temperature range was needed. Air velocity was also important to TES tank, lower velocity can not only increase the TES efficiency, but also enlarge the thermocline temperature gradient.
Published Version
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