Abstract
The solidification and liquefaction model of the phase change material-sal glaubera was set up via numerical heat transfer method, considering the heat convection. Firstly, the enthalpy method was employed to simulate the horizontal coaxial double-pipe thermal accumulating unit and the distribution of temperature and velocity fields was analyzed at the different time to estimate the influence of the heat convection. The calculating result indicates the heat convection can not be ignored due to the stronger and stronger affection caused by the heat convection when the time elapses. Hence, two enhanced new accumulating units, eccentric double-pipe and coaxial double-pipe with asymmetrical internal longitudinal fins, were studied. The simulation shows these new structures are able to increase the performance and reduce the liberating time of phase change material. The coaxial double-pipe with asymmetrical internal longitudinal fins is better than the eccentric double-pipe. The results presented in this paper could guide the practical design of the double-pipe thermal accumulating units.
| Original language | English |
|---|---|
| Pages (from-to) | 38-41 |
| Number of pages | 4 |
| Journal | Petrochemical Equipment |
| Volume | 43 |
| Issue number | 3 |
| DOIs | |
| State | Published - 25 May 2014 |
Keywords
- Fin tube
- Heat convection
- Numerical simulation
- Phase change material
- Thermal accumulating unit