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Energies 2017, 10(1), 33;

Experimental Study on Specific Heat of Concrete at High Temperatures and Its Influence on Thermal Energy Storage

State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
Huadong Engineering Corporation Limited, Hangzhou 311122, China
Author to whom correspondence should be addressed.
Academic Editor: Francesco Calise
Received: 18 September 2016 / Revised: 21 December 2016 / Accepted: 23 December 2016 / Published: 29 December 2016
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Using concrete as a thermal energy storage (TES) material is a promising option for large-scale solar-thermal resource development and utilization. Specific heat is one of the most important characteristics for TES performance. In this paper, the half-open dynamic method based on the mixing principle is proposed and applied to measure concrete-specific heat at temperatures up to 600 °C. Measurement of the specific heat of corundum ceramic (99% Al2O3) is first performed, and the test results illustrate the accuracy and efficiency of the proposed test method. Furthermore, concrete-specific heat tests are carried out at high temperatures. It found that the specific heat increases as the temperature rises, especially, linearly in the range of 300–600 °C, in which the concrete TES module is expected to be in operation. Finally, the effect of concrete-specific heat changes with temperature on its TES capacity is investigated, demonstrating that specific heat is of great significance for concrete TES design for concentrating solar power. View Full-Text
Keywords: concrete; specific heat; high temperature; thermal energy storage concrete; specific heat; high temperature; thermal energy storage

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Pan, J.; Zou, R.; Jin, F. Experimental Study on Specific Heat of Concrete at High Temperatures and Its Influence on Thermal Energy Storage. Energies 2017, 10, 33.

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