Comparison of two numerical heat transfer models for phase change material board
| Autor: | Xiaosong Zhang, Huoyan Hu, Xing Jin, Xin Zhou, Xing Shi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
020209 energy Energy Engineering and Power Technology Thermodynamics 02 engineering and technology Heat transfer coefficient 021001 nanoscience & nanotechnology Phase-change material Industrial and Manufacturing Engineering Heat capacity rate Sigma heat NTU method Volumetric heat capacity Heat transfer 0202 electrical engineering electronic engineering information engineering Heat capacity ratio 0210 nano-technology |
| Zdroj: | Applied Thermal Engineering. 128:1331-1339 |
| ISSN: | 1359-4311 |
| DOI: | 10.1016/j.applthermaleng.2017.09.015 |
| Popis: | The effective heat capacity method and the enthalpy method are the two most common methods to build the numerical heat transfer models for phase change material (PCM) board. The objective of this research was to compare the PCM heat transfer models which were built by the effective heat capacity method and the enthalpy method respectively. Based on the numerical results of these two models, it was found that when the model was built with the effective heat capacity method, the calculation error was inevitable when the state (solid, molten or liquid) of PCM was changed during the calculation of one time step, while there was no such error when the model was built with the enthalpy method. The phase change temperature range could affect the magnitude of the calculation error when the model was built with the effective heat capacity method. When the phase change temperature range was very small, the calculation error of the model with the effective heat capacity method could be significant. However, the model with the effective heat capacity method needed less computing time than the model with the enthalpy method. |
| Databáze: | OpenAIRE |
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