Preparation and Heat Transfer Performance of Steel Ball Phase Change Concrete
| Autor: | Chang Hong, Lihan Jin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Journal of New Materials for Electrochemical Systems. 23:204-212 |
| ISSN: | 2292-1168 1480-2422 |
| DOI: | 10.14447/jnmes.v23i3.a08 |
| Popis: | Accompanied by a large amount of heat absorption and release during the phase change process, phase change concrete has the advantages of high energy storage density, low volume expansion ratio and approximate isotherm in the heat exchange. It is widely used in the building field. For this, using steel balls as the carrier material and butyl stearate as the phase change material (PCM), the authors combined the phase change energy storage material with the energy pile to prepare a new type of concrete energy pile enhanced with the PCMs. Then, the tests and numerical simulations were conducted to study the optimal mix ratio and thermal conductivity of the phase change concrete. The results show that adding steel balls (10% of the coarse aggregate volume), and slag and fly ash (5% of the cementitious material mass) to the ordinary concrete C30 can greatly improve the heat transfer efficiency of the energy pile. The research findings provide a guidance for engineering practice. |
| Databáze: | OpenAIRE |
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