Suitability Assessment and Experimental Characterization of Phase Change Materials for Energy Conservation in Indian Buildings

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Rajat Saxena ◽  
Naman Agarwal ◽  
Dibakar Rakshit ◽  
S. C. Kaushik
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Thermal Capacity ◽  
Climatic Conditions ◽  
Melting Temperatures ◽  
Suitability Assessment ◽  
Efficiency Measures ◽  
Prime Concern ◽  
Change Temperature ◽  
And Performance

Abstract With increasing energy consumption in buildings, energy efficiency measures are matter of prime concern. A huge portion of energy consumed in buildings is used for regulating the thermal comfort. A solution to this is to incorporate phase change material (PCM) within the building elements which increases their overall thermal capacity. In the present study, the temperature of inner room surface, with and without PCM incorporation, is calculated for composite climate of Delhi. The analysis of PCM sandwiched walls has been performed. The performance analysis of five PCMs, having different melting temperatures, is carried out with nodal temperatures as the output. The results show that a phase change temperature range of 34–38 °C is suitable for peak summer conditions of Delhi. It is also observed that due to the low thermal conductivity of PCMs, they act as both storage medium and insulation, thus reducing temperature fluctuation during summer/winter. Based on the simulation, three PCMs were found suitable and hence were experimentally tested for their characteristic charging and discharging properties and performance, using differential scanning calorimeter (DSC). Based on the characterization results, it is concluded that two commercially available PCMs (Eicosane and OM35) are suitable for Delhi. All the other PCMs have also been simulated for different climatic conditions in India and their impact on heat gain has been assessed.

scholarly journals Effects of Neglecting PCM Hysteresis While Making Simulation Calculations of a Building Located in Polish Climatic Conditions

2021 ◽  
Vol 11 (19) ◽  
pp. 9166
Author(s):  
Anna Zastawna-Rumin ◽  
Katarzyna Nowak
Keyword(s):  
Surface Temperature ◽  
Phase Change ◽  
Phase Change Materials ◽  
Model Building ◽  
Experimental Tests ◽  
Climatic Conditions ◽  
Heat Accumulation ◽  
Noticeable Effect ◽  
Change Temperature ◽  
The Impact

The use of phase change materials (PCM) in different building applications is a hot topic in today’s research and development activities. Numerous experimental tests confirmed that the hysteresis of the phase change process has a noticeable effect on heat accumulation in PCM. The authors are trying to answer the question of whether the neglecting of hysteresis or the impact of the speed of phase transformation processes reduce the accuracy of the simulation. The analysis was performed for a model building, created to validate the energy calculations. It was also important to conduct simulations for the polish climatic conditions. The calculations were conducted for three variants of materials. In addition, in the case of models containing layers with PCM, calculations were made both taking into account, as well as excluding material hysteresis in the calculations. In the analyzed examples, after taking into account hysteresis in the calculations, the period of time when surface temperature is below the phase change temperature of the materials decreased by 10.6% and 29.4% between 01 June to 30 September, for the options with PCM boards and Dupont boards, respectively. Significant differences in surface temperature were also observed. The effects of neglecting, even relatively small hysteresis, in the calculations are noticeable and can lead to significant errors in the calculation.

scholarly journals Evaluation of the energy efficiency of an internal blind containing PCM

2018 ◽  
Vol 49 ◽  
pp. 00074 ◽  
Author(s):  
Michał Musiał
Keyword(s):  
Energy Efficiency ◽  
Phase Change ◽  
Phase Change Materials ◽  
Test Chamber ◽  
Field Tests ◽  
Entire Solution ◽  
Thermal Capacity ◽  
Climatic Conditions ◽  
Advantages And Disadvantages ◽  
Window Blinds

This article presents the possibilities of using phase change materials for the modernization of transparent partitions and elements functioning with them. The author draws attention to the possibility of reducing the energy costs of the building, by increasing the thermal capacity of the internal window blinds. The article draws attention to many factors related both to the properties of PCMs themselves, the place of application and climatic conditions that may affect the effectiveness of the entire solution. To assess the energy efficiency of the abovementioned shutter, field tests were carried out in an isothermal test chamber. The article presents the results of the conducted research, showing the advantages and disadvantages of the considered solution. A large number of scientific papers, in which the possibilities of using phase change materials for the modernization of transparent partitions are presented, apply only to the modernization of glazing. In this context, this work presents a different approach to the issues of using phase change materials in construction.

Preparation and Characterization of Diatomite Loaded Composite Phase Change Materials

2013 ◽  
Vol 320 ◽  
pp. 314-319
Author(s):  
Jun Mao ◽  
Shui Lin Zheng ◽  
Yu Zhong Zhang ◽  
Yan Ping Bai ◽  
Yue Liu
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Physical Adsorption ◽  
Phase Change Temperature ◽  
Composite Phase Change Materials ◽  
Change Temperature ◽  
Composite Phase Change Material ◽  
And Performance ◽  
Change Material

Organic phase change materials like paraffin as phase change material, modified diatomite as carrier, composite phase change material with proper phase change temperature and larger phase change enthalpy is prepared by melt blending. The structure and performance of composite phase material are characterized using SEM, FI-IR and synthesized thermal analyzer DSC. The results show that the phase change temperature of composite phase change material is 30, and phase change enthalpy is 89.54J/g. With every part preserved, phase change particles are distributed in the diatomite/melted paraffin matrix evenly. Stable composite phase change materials are prepared with diatomite as carrier and paraffin as PCM, which are bonded with Vander Waals forces in the form of physical adsorption.

Fabrication and performance of shape‐stable phase change materials based on epoxy group crosslinking

2021 ◽  
Vol 138 (28) ◽  
pp. 50681
Author(s):  
Lijuan Tao ◽  
Sai Chen ◽  
Haihui Liu ◽  
Na Han ◽  
Wei Li ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Epoxy Group ◽  
Stable Phase ◽  
And Performance

Preparation and performance of shape-stable phase change materials based on carbonized-abandoned orange peel and paraffin

2019 ◽  
Vol 27 (4) ◽  
pp. 289-298 ◽  
Author(s):  
Yunfei Xu ◽  
Xiaoguang Zhang ◽  
Bogang Wu ◽  
Youguo Xu ◽  
Ruilong Wen ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Orange Peel ◽  
Stable Phase ◽  
And Performance

Preparation and Thermal Propertites of Polyethylene Glycol/ Silica Hollow Nanospheres Composite as Shape-Stabilized Phase Change Materials

2013 ◽  
Vol 773 ◽  
pp. 534-537 ◽  
Author(s):  
Li Li Feng ◽  
Jing Jing Tong ◽  
Chong Yun Wang
Keyword(s):  
Thermal Properties ◽  
Polyethylene Glycol ◽  
Phase Change ◽  
Porous Structure ◽  
Phase Change Materials ◽  
Hollow Nanospheres ◽  
Lower Phase ◽  
Phase Change Temperature ◽  
Change Temperature ◽  
Change Material

Shape-stabilized phase change material (PCM) composed of polyethylene glycol and silica hollow nanospheres was prepared by a vacuum impregnating method. Thermal properties of the composite PCM were investigated by various techniques. Lower phase change temperature and enthalpy of the composite PCM were observed. It is concluded that the phase change properties of the composite PCM are influenced by the adsorption confinement of the PEG segments from the porous structure of the silica hollow nanospheres.

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