Energy storage capacity configuration of building integrated photovoltaic‐phase change material system considering demand response

This research works involves the production of microencapsulated phase change material (PCM) in which paraffin wax was used as the core components with sebacyol chloride (SC) and hexamathylene diamine (HMD) as the shell component. The microencapsulated PCM was characterized using Fourier Transform Infrared (FTIR) and scanning electron microscopy (SEM). Thermal energy storage capacity was measured by differential scanning calorimetry (DSC) while thermal conductivity was measured by thermal gravimetric analysis (TGA). The microencapsulated PCM were found to have a regular spherical shape with a size of 50µm while FTIR indicated that the microencapsulation process occurs due to the existence of alkyl group (C-H) and carbonyl group (C=O) in the spectra. DSC analysis shows that the paraffin start to melt at 47°C to 56°C with thermal energy storage capacity of 140.097 J/g and 114.766 J/g for sample A and sample B respectively. It was found that higher value of thermal energy storage resulting to lower thermal conductivity, which can be used as a thermal barrier in various applications.

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Natural microtubule encapsulated phase change material with high thermal energy storage capacity

Energy ◽

10.1016/j.energy.2019.02.052 ◽

2019 ◽

Vol 172 ◽

pp. 1144-1150 ◽

Cited By ~ 12

Author(s):

Shaokun Song ◽

Tingting Zhao ◽

Feng Qiu ◽

Wanting Zhu ◽

Taorui Chen ◽

...

Keyword(s):

Energy Storage ◽

Phase Change ◽

Phase Change Material ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Storage Capacity ◽

Energy Storage Capacity ◽

Encapsulated Phase Change Material ◽

Change Material

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Computational Modeling of Dynamic Response of a Latent Thermal Energy Storage System With Embedded Heat Pipes

Journal of Solar Energy Engineering ◽

10.1115/1.4024745 ◽

2013 ◽

Vol 136 (1) ◽

Cited By ~ 15

Author(s):

K. Nithyanandam ◽

R. Pitchumani

Keyword(s):

Heat Transfer ◽

Energy Storage ◽

Dynamic Response ◽

Phase Change ◽

Phase Change Material ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Heat Pipes ◽

Material System ◽

Change Material

Concentrating solar power plants (CSPs) are being explored as the leading source of renewable energy for future power generation. Storing sun's energy in the form of latent thermal energy of a phase change material (PCM) is desirable for use on demand including times when solar energy is unavailable. Considering a latent thermal energy storage (LTES) system incorporating heat pipes to enhance heat transfer between the heat transfer fluid (HTF) and the PCM, this paper explores the dynamic response of the LTES system subjected to repeated cycles of charging and discharging. A transient computational analysis of a shell-and-tube LTES embedded with two horizontal heat pipes is performed for repeated charging and discharging of the PCM to analyze the dynamic performance of the LTES, and the augmentation in the cyclic performance of the LTES embedded with heat pipes is investigated. A model low temperature phase change material system is considered in the present study, with the physical results being scalable to high temperature systems used in CSP plants.

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Experimental Investigation on a PCM Based Thermal Energy Storage System for a VCR System

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.106.116 ◽

2021 ◽

Vol 106 ◽

pp. 116-120

Author(s):

Shaik Riyaz Basha

Keyword(s):

Energy Storage ◽

Phase Change ◽

Phase Change Material ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Cycle Time ◽

Phase Change Materials ◽

Storage Capacity ◽

Food Storage ◽

Change Material

Thermal energy storage (TES) based on hidden heat concept is good substitute for sensible heat storage because of its dense storage capacity and almost constant temperature heat transfers during the charging and discharging cycle. During no load and low cooling load conditions the system stores the thermal energy in the storage medium (phase change material) which will be used latter to meet the requirement in off cycle conditions. The intention of present work is to increase the system off cycle time, maintain required temperatures during power cuts by joining a few inch thick layer of phase change material on the outer surface of the evaporator. For investigation purpose a deep freezer which runs on vapor compression system of 50 liters storage capacity is fabricated with and without phase change materials. The eutectic compositions nearly 23 wt% salt (NaCl) dissolved in water and aluminium nitrate around 26 wt% dissolved in water are used as phase change materials. By the end of all experimental investigations it was noticed that the off cycle time system with phase change material is increased by 5.5 hours compared to system without phase change material, food storage time is enhanced by 8 to 14 hrs and a little power saving also achieved.

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Computational Modeling of Dynamic Response of a Latent Thermal Energy Storage System With Embedded Heat Pipes

ASME 2011 5th International Conference on Energy Sustainability, Parts A, B, and C ◽

10.1115/es2011-54501 ◽

2011 ◽

Cited By ~ 1

Author(s):

Karthik Nithyanandam ◽

Ranga Pitchumani

Keyword(s):

Heat Transfer ◽

Energy Storage ◽

Dynamic Response ◽

Phase Change ◽

Phase Change Material ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Heat Pipes ◽

Material System ◽

Change Material

Concentrated solar power plants (CSP) are being explored as the leading source of renewable energy for future power generation. Storing sun’s energy in the form of latent thermal energy of a phase change material (PCM) is desirable for use on demand including times when solar energy is unavailable. Considering a latent thermal energy storage (LTES) system incorporating heat pipes to enhance heat transfer between the heat transfer fluid (HTF) and the PCM, this paper explores the dynamic response of the LTES system subjected to repeated cycles of charging and discharging. A transient computational analysis of a shell-and-tube LTES embedded with two horizontal heat pipes (HHP) is performed for repeated charging and discharging of the PCM to analyze the dynamic performance of the LTES and the augmentation in the cyclic performance of the LTES embedded with heat pipes is investigated. A model low temperature phase change material system is considered in the present study, with the physical results being scalable to high temperature systems used in CSP plants.

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Synthesis and Characterization of the Paraffin/Expanded Perlite Loaded With Graphene Nanoparticles as a Thermal Energy Storage Material in Buildings

Journal of Solar Energy Engineering ◽

10.1115/1.4046087 ◽

2020 ◽

Vol 142 (4) ◽

Cited By ~ 3

Author(s):

Pushpendra Kumar Singh Rathore ◽

Shailendra Kumar Shukla ◽

Naveen Kumar Gupta

Keyword(s):

Thermal Conductivity ◽

Energy Storage ◽

Phase Change ◽

Phase Change Material ◽

Thermal Energy ◽

Storage Capacity ◽

Heat Storage ◽

Expanded Perlite ◽

Latent Heat Storage ◽

Change Material

Abstract Various properties of the paraffin have made them compatible to be incorporated in the building materials for improving the latent heat storage capacity of the building envelope. However, the poor thermal conductivity of the paraffin reduces their thermal performance and hence limits their direct application/incorporation in the buildings. In this study, composite mixtures of paraffin and expanded perlite (EP) with an equal weight percent of 49.5 and 47.5, loaded with 1% and 5% of graphene nano-platelets, respectively, were synthesized. The developed samples were characterized uncycled and after 2000 thermal cycles. The results indicate that phase change material (PCM)/expanded perlite/graphene nano-platelets composite shows a significant increment in the thermal conductivity, reduction in the latent heat storage capacity, and a small weight loss. The heat storage/release test depicts that the phase change material/expanded perlite/graphene nano-platelets-5 shows 1.66 and 2.5 times faster heat storage/release rate than phase change material/expanded perlite/graphene nano-platelets-1 and paraffin, respectively. There is no significant change noted after 2000 thermal cycles in phase change material/expanded perlite/graphene nano-platelets-5 and phase change material/expanded perlite/graphene nano-platelets-1 samples, suggesting long-term reliability of the composite PCM. Additionally, thermogravimetric analysis (TGA) and Fourier-transform infrared spectroscopy (FTIR) testing were also conducted and the results suggest high thermal reliability and good chemical compatibility. These analyses suggest that the phase change material/expanded perlite/graphene nano-platelets composite can become a potential candidate for thermal energy storage.

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