The application method research of using phase change materials to reduce the inner temperature rise of dam concrete

Title: The application method research of using phase change materials to reduce the inner temperature rise of dam concrete
Author(s): G. Gao, C. Qian
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 995 - 1004
Total Pages: 10
Nb references: 19
Language: English

Abstract: The required capability was analyzed of phase change materials (PCM) used to decrease the inner temperature rise based on the temperature history of dam concrete. The calculation formula of interior maximum adiabatic temperature rise of concrete with pre-embedded PCM and the quantity of heat of microencapsulated phase change materials (MNPCM) suspensions absorbed were deducted. The results showed that 20±3°C is the feasible melting temperature of PCM used to decrease the inner temperature rise of dam concrete; When a plenty of PCM pre-embedded in dam concrete, the decrease of temperature is obviously, as a result the long and wide pipes were needed; With the extent of temperature rise increased, the extent of transmit heat efficiency of MNPCM suspensions decreased. The quantity of heat that MNPCM suspensions absorbed can be improved 168--57% when the temperature rise 3-8°C.
The efficiency of the transmit heat can be increased and the energy consume can be decreased when MNPCM suspensions were used to replace water as cooling medium. The method of using MNPCM suspensions have higher technical and economic feasibility than the method of using pre-embedded PCM to decrease the inner temperature of dam concrete.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00