Solar thermal storage systems using phase change materials

1988 ◽  
Vol 12 (3) ◽  
pp. 547-555 ◽  
Author(s):  
D. Buddhi ◽  
N. K. Bansal ◽  
R. L. Sawhney ◽  
M. S. Sodha
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Storage Systems ◽  
Thermal Storage ◽  
Solar Thermal

Highly efficient solar-thermal storage coating based on phosphorene encapsulated phase change materials

2020 ◽  
Vol 32 ◽  
pp. 199-207
Author(s):  
Waseem Aftab ◽  
Muhammad Khurram ◽  
Shi Jinming ◽  
Hassina Tabassum ◽  
Zibin Liang ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Thermal Storage ◽  
Solar Thermal ◽  
Highly Efficient

Research Development and Application of Solar Thermal Storage With Phase Change Materials

2010 ◽  
Author(s):  
Fang Liu ◽  
Hao Liang ◽  
Hang Yu ◽  
Xiaomei Tang
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Materials ◽  
Thermal Storage ◽  
The Other ◽  
Solar Thermal ◽  
Economic Research ◽  
Research Development ◽  
Storage Technology ◽  
Composite Phase Change Materials

Research on efficient and economical thermal storage technology becomes common issue to the scholars. Especially research on PCMs becomes hot spot these years. In view of the discontinuity and instability of solar energy, efficient and economic research on energy storage technology occupies a very important position. This article summarizes and evaluates the research development and applications of solar thermal storage technology with PCMs both in China and the other countries. Including four parts: A review on preparation of new composite phase change materials and its thermophysical properties was carried out. Various heat transfer enhancement technology was overviewed. Including adding metal fill, adding graphite, capsule package, plus fins, adding carbon fiber and composite phase change materials, etc. Mathematical modeling of a latent heat thermal energy storage system (LHTES) was reviewed in recent years which is used for the optimum material selection and to assist in the optimal designing of the systems. The important characteristics of different models and their assumptions used are presented and discussed, the experimental validation of some models are also presented. The applications and prospects of PCMs used in the different fields were summarized, such as industry, agriculture, construction, textiles, electronic products, medicine, transportation etc. Finally, conclusions and perspectives were drawed. Hope to provide references to the other researchers in this field.

scholarly journals A novel empirical heat transfer model for a solar thermal storage process using phase change materials

Energy ◽  
2019 ◽  
Vol 168 ◽  
pp. 222-234 ◽  
Author(s):  
Yu Bie ◽  
Ming Li ◽  
Fei Chen ◽  
Grzegorz Królczyk ◽  
Lin Yang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Phase Change Materials ◽  
Thermal Storage ◽  
Heat Transfer Model ◽  
Solar Thermal ◽  
Transfer Model ◽  
Storage Process

Numerical Model for Storage Systems Based on Phase-Change Materials

2011 ◽  
Author(s):  
Adriano Sciacovelli ◽  
Vittorio Verda ◽  
Francesco Colella
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Phase Change Materials ◽  
Storage Systems ◽  
Numerical Procedure ◽  
Thermal Storage ◽  
Operating Conditions ◽  
Heat Transfer Fluid ◽  
Inlet Temperature ◽  
Technical Problems

Phase-change materials (PCM) are particularly promising for thermal storage in various energy plants as solar plants, district heating, heat pumps, etc. mainly because of the possibility to reduce the volume of storage tanks, but also because the problems related with thermal stratification are considerably reduced. On the other hand, research is necessary in order to address technical problems, mainly related to the heat transfer in the medium, which needs to be enhanced in order to achieve reasonable charging and discharging processes. The present paper describes the application of computational fluid-dynamics (CFD) for the analysis of PCM thermal storage systems. The numerical analysis is directed at understanding the role of buoyancy-driven convection during constrained solidification and melting inside a shell-and-tube geometry. The 2D model is based on a finite-volume numerical procedure that adopts the enthalpy method to take in account the phase change phenomenon. The time-dependent simulations show the melting phase front and melting fraction of the PCM and incorporate the fluid flow in the liquid phase. The obtained temperature profiles are compared to a set of experimental data available in the literature. The results show that during the melting process natural convection within the PCM has non negligible effects on the behavior of the system. The numerical simulations of the solidification process show that the increasing solid fraction of the PCM inhibits the buoyancy in the remaining liquid portion of the phase-change-material. Furthermore, the paper discusses the effects on the phase-change processes of the main operating conditions, including inlet temperature and mass flow rate of the heat transfer fluid.

Phase Change Thermal Diode Using Al2O3-Cu/Water Hybrid Nanofluids for Thermal Rectification Enhancement

2020 ◽  
Author(s):  
M. Y. Wong ◽  
C. Y. Tso ◽  
T. C. Ho
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
Phase Change ◽  
Storage Systems ◽  
Thermal Storage ◽  
Solar Thermal ◽  
Working Fluid ◽  
Hybrid Nanofluid ◽  
Thermal Rectification ◽  
Hybrid Nanofluids

Abstract A thermal diode, a device to manipulate the heat flow in different directions, is useful in various thermal systems, such as solar thermal storage systems. It is noted that the performance of phase change thermal diodes shows the highest thermal rectification performances in the literature. The performances of the phase change thermal diode can be further improved by utilizing a working fluid with enhanced thermal properties. Since hybrid nanofluids are proven to have better thermal properties than the base fluid (i.e. water), in this study, a thermal diode using Al2O3-Cu/water hybrid nanofluid is fabricated and tested to investigate the feasibility of using hybrid nanofluid to enhance the performance of the thermal diode. The heat transfer and thermal rectification performances of the thermal diode using Al2O3-Cu/water hybrid nanofluid are compared experimentally, to a thermal diode using water. The effect of temperature on the heat transfer and thermal rectification performances of the thermal diode is also examined. The results indicate that the effective thermal conductivity in the forward direction and the diodicity of the thermal diode using Al2O3-Cu/water hybrid nanofluid are improved by 42.4% and 30.8%, respectively, compared to that of the thermal diode using water. The findings not only reveal a new direction for future research in enhancement of the thermal rectification performance of the phase change thermal diode but also provide an alternative research path for improving the performance of existing solar thermal storage systems.

scholarly journals Solidification and Melting of Phase Change Material in Cold Thermal Storage Systems

2021 ◽  
Author(s):  
Hani Hussain Sait
Keyword(s):  
Cost Effectiveness ◽  
Phase Change ◽  
Energy Demand ◽  
Phase Change Materials ◽  
Storage Systems ◽  
Peak Load ◽  
Thermal Storage ◽  
Thermal Capacity ◽  
Maximum Efficiency ◽  
Change Material

Cold thermal storage can be used to manage peak load when the energy demand is exceeding the capacities of the electric companies. Latent heat thermal storage is more effective because it requires less spacing and has higher thermal capacity than other types. Solidification and melting are taking place in CTS and need more investigation for better performance. Phase change materials properties vary and need more investigation to select the most suitable for a certain application. The analytical equations are needed for design of CTS and get the maximum efficiency out of it. Cost effectiveness is also described.

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