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The numerical simulation and experimental study of heat release in a heat storage system with various diameters of aluminum tubes
- Source :
- Heliyon, Heliyon, Vol 5, Iss 10, Pp e02651-(2019)
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Phase change materials (PCMs) can be used to store solar energy. The heat released from PCMs is directly influenced by the efficiency of thermal energy storage and the scope of application. In this study, paraffin was used as the PCM, and was encapsulated in an aluminum tube. The temperature of the inner PCM was measured, and the heat release process of the PCM was simulated. The results indicate that the melt temperature of the PCM ranged from 45 °C to 60 °C, and the latent heat was 177 J/g. The heat release processes of the PCM in different aluminum tubes included three stages: 1) the stage during which no phase change occurred at temperatures above the melt temperature and at a rapidly decreasing temperature; 2) the stage during which phase change occurred at very slowly decreasing temperatures; 3) the stage during which no phase change occurred at temperatures lower than the melt temperature. The temperature of the PCM decreased when the radius of the aluminum tube increased. The temperature results obtained via simulation were similar to the actual temperature data. The total energy released from the PCM increased linearly with the time required to complete the energy release process of the PCM in aluminum tubes with different diameters, as well as with the increase in the aluminum tube diameter. The diameter of the PCM exerted no significant influence on the energy release rate. The relationship between the tube diameter and the time required to complete heat release, and the relationship between the amount of heat released, the diameter of the aluminum tube, and the release time, were established. These equations could predict actual values and provide theoretical guidance for heat release in heat storage systems. They could also be used as a guide in practical production.<br />Energy; Energy storage technology; Solar energy; Energy sustainability; Energy conservation; Energy use in building; Urban energy consumption; Phase change material (PCM); Heat release; Simulation; Aluminum tube diameter
- Subjects :
- Heat release
0301 basic medicine
animal structures
Materials science
Urban energy consumption
Aluminum tube diameter
chemistry.chemical_element
Energy conservation
Thermal energy storage
Article
Energy storage technology
03 medical and health sciences
0302 clinical medicine
Solar energy
Aluminium
Latent heat
Phase change material (PCM)
Tube (fluid conveyance)
lcsh:Social sciences (General)
Composite material
lcsh:Science (General)
skin and connective tissue diseases
Strain energy release rate
Energy
Multidisciplinary
business.industry
Radius
Energy sustainability
030104 developmental biology
chemistry
lcsh:H1-99
Energy use in building
business
Simulation
030217 neurology & neurosurgery
lcsh:Q1-390
Subjects
Details
- ISSN :
- 24058440
- Volume :
- 5
- Database :
- OpenAIRE
- Journal :
- Heliyon
- Accession number :
- edsair.doi.dedup.....0f560982979c26a2fbeb6330975cf3e2