Preparation and thermal performances of Na2HPO4·12H2O/ SiO2 hydrophilic modified expanded graphite form-stable composite phase change material for radiant floor heating system

2021 ◽  
Vol 230 ◽  
pp. 111221
Author(s):  
Yutang Fang ◽  
Wei Diao ◽  
Jianmin Su ◽  
Xianghui Liang ◽  
Shuangfeng Wang ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Expanded Graphite ◽  
Heating System ◽  
Composite Phase Change Material ◽  
Radiant Floor Heating System ◽  
Radiant Floor Heating ◽  
Change Material ◽  
Floor Heating

scholarly journals Defrosting Performance Improvement of Air-Source Heat Pump Combined Refrigerant Direct-Condensation Radiant Floor Heating System with Phase Change Material

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4594 ◽  
Author(s):  
Chenxiao Zheng ◽  
Shijun You ◽  
Huan Zhang ◽  
Zeqin Liu ◽  
Wandong Zheng ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Heat Pump ◽  
Heating System ◽  
Air Source Heat Pump ◽  
Composite Phase Change Material ◽  
Radiant Floor Heating System ◽  
Radiant Floor Heating ◽  
Change Material ◽  
Floor Heating

Traditional defrosting methods applied to solve frosting problems of air-source heat pumps operating in cold periods may reduce heat capacity of the system and decrease indoor thermal comfort. In order to improve the performance of air-source heat pump (ASHP) and maintain indoor temperature in defrosting conditions, an air-source heat pump combined with a refrigerant direct-condensation radiant floor heating system with phase change material is proposed and evaluated in this study. Two radiant floor heating terminals with and without composite phase change material modules were compared through experiments. A composite phase change material based on dodecanoic acid-tetradecanol-hexadecanol mixture and expanded graphite was investigated for this application. Experimental results indicate that both heat fluxes of two comparing terminals are higher than 70 W/m2 in heating condition. At the same time, the floor surface temperature, indoor air temperature, and heating capacity of the terminal with composite phase change material modules are higher than those without composite phase change material modules in defrosting condition. This suggests that the proposed system with composite phase change material modules can improve indoor thermal comfort in defrosting condition as well as satisfy the heating requirement in heating condition.

Fabrication of CaCl2 · 6H2O/Na2SiO3 · 9H2O composite phase change material for floor heating system

2018 ◽  
Vol 5 (6) ◽  
pp. 065524 ◽  
Author(s):  
Kaixuan Cui ◽  
Liqiang Liu ◽  
Fukun Ma ◽  
Mingjie Sun ◽  
Zhenyi Li ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Heating System ◽  
Composite Phase Change Material ◽  
Change Material ◽  
Floor Heating

Effect of the Additive on Thermal Conductivity of the Phase Change Material

2011 ◽  
Vol 399-401 ◽  
pp. 1302-1306 ◽  
Author(s):  
Wei Hua Li ◽  
Jin Feng Mao ◽  
Li Jun Wang ◽  
Lu Yan Sui
Keyword(s):  
Thermal Conductivity ◽  
Phase Change ◽  
Phase Change Material ◽  
Sodium Acetate ◽  
Heat Storage ◽  
Expanded Graphite ◽  
Sodium Acetate Trihydrate ◽  
Acetate Trihydrate ◽  
Composite Phase Change Material ◽  
Change Material

The aim of the paper is to analyze the effect of the additives on thermal conductivity of the phase change material. The experiment about heat storage and heat release performance of the composite phase change material which uses sodium acetate trihydrate as host material is studied. The effect of the expanded graphite on the composite phase change material is investigated. The results show that: expanded graphite which can be dispersed evenly in the composite phase change material, the thermal stability is well, significantly improve the thermal conductivity of the composite phase change material.

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