Testing of High Thermal Cycling Stability of Low Strength Concrete as a Thermal Energy Storage MaterialReportar como inadecuado


Testing of High Thermal Cycling Stability of Low Strength Concrete as a Thermal Energy Storage Material


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1

State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China

2

Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China





*

Author to whom correspondence should be addressed.



Academic Editor: Stefano Invernizzi

Abstract Concrete has the potential to become a solution for thermal energy storage TES integrated in concentrating solar power CSP systems due to its good thermal and mechanical properties and low cost of material. In this study, a low strength concrete C20 is tested at high temperatures up to 600 °C. Specimens are thermally cycled at temperatures in the range of 400–300 °C, 500–300 °C, and 600–300 °C, which TES can reach in operation. For comparison, specimens also cycled at temperature in the range of 400–25 °C room temperature, 500–25 °C, and 600–25 °C. It is found from the test results that cracks are not observed on the surfaces of concrete specimens until the temperature is elevated up to 500 °C. There is mechanical deterioration of concrete after exposure to high temperature, especially to high thermal cycles. The residual compressive strength of concrete after 10 thermal cycles between 600 °C and 300 °C is about 58.3%, but the specimens remain stable without spalling, indicating possible use of low strength concrete as a TES material. View Full-Text

Keywords: low strength concrete; thermal energy storage; thermal cycling; solar energy low strength concrete; thermal energy storage; thermal cycling; solar energy





Autor: Chao Wu 1, Jianwen Pan 1,2,* , Wen Zhong 1 and Feng Jin 1

Fuente: http://mdpi.com/



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