Experimental Study on the Heat Storage/Release Characteristics of a Thermoelectric Heat Pump Phase-Change Thermal Storage Device

2011 ◽  
Author(s):  
Min Xu ◽  
Ling Zhang ◽  
ZB Liu ◽  
JL Zhou
Keyword(s):  
Experimental Study ◽  
Phase Change ◽  
Heat Pump ◽  
Heat Storage ◽  
Thermal Storage ◽  
Storage Device ◽  
Thermoelectric Heat Pump ◽  
Thermoelectric Heat

The Heat Charge and Discharge Characteristics Simulation of Phase Change Thermal Storage Device

2011 ◽  
Vol 179-180 ◽  
pp. 239-242
Author(s):  
Hai Chuan Tian ◽  
Feng Xu ◽  
Guo Li Yang ◽  
Teng Fei Wu
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Heat Storage ◽  
Thermal Storage ◽  
Storage Device ◽  
Transfer Model ◽  
Two Dimensional ◽  
Unsteady Heat Transfer ◽  
Discharge Characteristics ◽  
Release Property

The two-dimensional unsteady heat transfer model is been established. Analyzing on heat storage-release property of phase change thermal storage device within the fluid parallel spiral pipes in various conditions, suggestions are put forward to strengthen thermal storage for the device.

scholarly journals Analysis of thermal storage performances of solar thermal power generation unit using computer numerical simulation analysis

2020 ◽  
Vol 24 (5 Part B) ◽  
pp. 3347-3355
Author(s):  
Ruilian Wang ◽  
Yan Ren ◽  
Minping Xie
Keyword(s):  
Numerical Simulation ◽  
Heat Exchange ◽  
Numerical Model ◽  
Phase Change ◽  
Heat Storage ◽  
Thermal Storage ◽  
Storage Device ◽  
Storage Efficiency ◽  
Storage Unit ◽  
Inlet Velocity

Objective: In this study, the single tank inclined layer heat storage system is simulated and analyzed by computer, so as to explore the performance of the heat storage device of the solar thermal generator system. Method: First of all, for the phase change thermal storage unit, its physical model of is established. Heat transfer fluid is Hitec salt, and phase change material is potassium nitrate. Then, as for the phase change thermal storage unit, its numerical model of is established. The simulation results of the numerical model are verified. Finally, through numerical simulation, how do the inlet velocity of the heat exchange fluid and the ambient temperature influence the heat storage performance is analyzed. Results: The heat storage period of the regenerator will decrease when the inlet velocity of the heat exchange fluid increases, but the heat storage efficiency of the regenerator will decrease. Therefore, in this study, under the premise of ensuring a higher heat storage efficiency and a shorter heat storage cycle, it is more reasonable to choose 0.25 m/s as the inlet velocity. In winter and summer, it is necessary to insulate the tank. On the one hand, the heat loss can be reduced. On the other hand, the heat storage efficiency of single tank can be improved. Conclusion: Analysing the efficiency of the single tank thermal storage device can provide a reference for the optimal design of the solar heat plant thermal storage tank, and lay a certain foundation for its theoretical and experimental research.

scholarly journals Experimental Research of the Heat Storage Performance of a Magnesium Nitrate Hexahydrate-Based Phase Change Material for Building Heating

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7108
Author(s):  
Yang Li ◽  
Caixia Wang ◽  
Jun Zong ◽  
Jien Ma ◽  
Youtong Fang
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Heat Storage ◽  
Thermal Storage ◽  
Magnesium Nitrate ◽  
Storage Device ◽  
Outer Side ◽  
Nitrate Hexahydrate ◽  
Magnesium Nitrate Hexahydrate ◽  
Change Material

Phase change heat storage material is a preferred material in solar building heating or off-peak electric-heat storage heating technology and is the research focus. A compact phase change thermal storage device has been designed and experimentally studied for improving heating system load in this work. A new type, magnesium nitrate hexahydrate-based phase change material has been studied to improve the cooling degree and crystallization difficulty. The focus of this study is on the heat charging and discharging characteristics of this new phase change material. The heat storage device has two groups of coils, the inner side which carries water and the outer side which is the phase change material. A testing system was built up to value the thermal cycling performance of the heat storage device. The measurement data include phase change material temperature field, water inlet and water outlet mean temperature, heat charging and heat discharging depth, and flow rates over the operating period. The results show the phase change material has a quick response with the operating temperature range of 20–99 °C. Its latent heat is 151.3 J/g at 91.8 °C. The heat storage density of this phase change material is about 420 MJ/m3. The thermal performance degradation is about 1.8% after 800 operation cycles. The phase change thermal storage device shows flexibility and a great potential to improve the capacity and economy of heating systems.

Experimental Investigation and the Development of Phase Change Heat Storage Device Adapted to the Solar Energy Heat Pump

2013 ◽  
Vol 860-863 ◽  
pp. 191-195
Author(s):  
Hong Chen Zhang ◽  
Hong Tao Wang ◽  
Feng Li Li ◽  
Li Qing Zhang
Keyword(s):  
Heat Exchange ◽  
Phase Change ◽  
Heat Pump ◽  
Phase Change Materials ◽  
Heat Storage ◽  
Storage Device ◽  
Release Process ◽  
Pump System ◽  
Heat Pump System ◽  
Depth Analysis

on the basis of the working principle of solar heat pump system is introduced in this paper, Focuses on the structure of the heat storage device and the selection of phase change materials, structure, The influence of phase change materials the size of the diameter to heat-exchange, The influence of phase change materials piled up form to heat-exchange, The influence of thermal fluid flow velocity to heat exchange , In-depth analysis of phase change materials and thermal fluid accumulation of heat and heat release process , Solve the problem of supercooling and dialysis of phase change heat storage materials, The use of phase change materials have a positive reference value.

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