phase change of paraffin wax has a simple process as see in below steps and you can study it carefully to see making candle by paraffin wax .
1. Solid to Liquid (Melting) phase change of paraffin wax
- Temperature: Paraffin wax melts between 46°C to 68°C (115°F to 154°F), depending on the specific type of wax.
- Process: When the temperature rises above the melting point, the solid wax absorbs heat, which weakens the molecular bonds. paraffin wax allows the wax to transition from solid to liquid.
2. Liquid to Solid (Freezing/Solidification)
- Temperature: As the temperature drops below the melting point, the wax solidifies.
- Process: As the temperature decreases, the molecules in the wax lose energy and form stronger bonds, paraffin wax causing the wax to return to its solid state.
phase change of paraffin wax Characteristics:
- Latent Heat: The phase changes between solid and liquid states require latent heat. This energy is necessary to change the phase without changing the temperature.
- Latent heat of fusion is need during melting (solid to liquid).
- Latent heat of solidification is release during freezing (liquid to solid).
People commonly use paraffin wax in candles, insulation, and phase change materials for energy storage due to its ability to undergo these phase change of paraffin wax at a consistent temperature.
thermal conductivity and heat storage performances of paraffin
In order to enhance the thermal energy storage efficiency of phase change materials, as the effective heat transfer promoters in different mass fraction (0.1, 0.5, 1.0, 1.5 and 2.5 wt.%) were add into the paraffin. The chemical properties, latent heat capacities, thermal conductivity and heat storage performances of paraffin and the composites were investigate.
The results shows that the addition of EG and MGN could increase the thermal conductivity of paraffin. At 20 °C, the thermal conductivity of the paraffin was increased by 61.04%, 51.2%, 12.18% . In addition, with the same mass fraction, the heat storage and release time of the composite were 56.03% and 54.26%, respectively, shorter than that of paraffin when the additive was EG.
