A review of phase change materials and heat enhancement methodologies

Saqib, Muhammad; Andrzejczyk, Rafał

doi:10.1002/wene.467

Cited by 10 publications

(6 citation statements)

References 161 publications

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“…The shell‐and‐tube type of LHTES is the most oftenused configuration as of its benefits, such as simple design, low cost, low‐pressure drop, large heat transfer area, high discharge power, and high efficiency 49 . Furthermore, the PCM will be placed between the two tubes, which directly exchange heat between the heat transfer fluid (HTF) and the working fluid, as proposed by several researchers 50–52 . Aside from that, the industry uses shells and tubes 90% of the time.…”

Section: Methodsmentioning

confidence: 99%

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The theoretical approach of the solar organic Rankine cycle integrated with phase change material for the Hungarian region

Permana,

Rusirawan,

Farkas

2023

Energy Science & Engineering

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Hungary is not only dependent on imports of natural gas and fossil fuels, but Hungary is also the lowest in renewable energy utilization; otherwise, only 11.3% compared to other Central European countries in renewable energy utilization, above 13%. The percentage of renewables in power generation quadrupled from 8% to 16% between 2010 and 2020, with most of the gains coming from the rapid expansion of solar energy, particularly after 2016. Regarding solar energy resource potential, Hungary has a daily total of around 3.2–3.6 kWh/m2 and a yearly total of about 1168–1314 kW.h/m2. This makes it a suitable location for putting solar thermal collectors in conjunction with an organic Rankine cycle (ORC) system. In this study, the authors analyzed solar thermal as a heat source to generate electricity with ORC using two types of working fluids (R245fa and R123). Hungary's weather data for a whole year is used as primary data to look for solar radiation characteristics and ambient temperature. Based on the general solar collector equation, the parabolic tube collector was selected as the best solar collector to utilize solar radiation by producing a maximum heat of around 654.68 kW. Therefore, the evacuated flat plate collector was selected as the solar collector that can produce the maximum outlet temperature of around 372.15 K with a similar size aperture area. Producing a temperature output from the solar collector for heat transfer in the ORC system and from the performance showed that R245fa resulted in better Wnet performance compared with R123 with values of 45.82 and 28.17 kW, respectively, under the same solar collector. Meanwhile, the material suitable for the thermal energy storage‐evaporator combination is organic phase change material using N‐Octacosane, which in the same temperature range (350–375 K) has the smallest ζ(T) value (1.08–1.103), so the mass required for the system is very efficient.

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Section: Methodsmentioning

confidence: 99%

“…49 Furthermore, the PCM will be placed between the two tubes, which directly exchange heat between the heat transfer fluid (HTF) and the working fluid, as proposed by several researchers. [50][51][52] Aside from that, the industry uses shells and tubes 90% of the time. It comprises a shell, a tube, baffles, a front head, a rear head, and a nozzle.…”

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confidence: 99%

The theoretical approach of the solar organic Rankine cycle integrated with phase change material for the Hungarian region

Permana,

Rusirawan,

Farkas

2023

Energy Science & Engineering

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“…PCMs are substances capable of conducting reversible phase transitions between solid and liquid states while absorbing or releasing thermal energy within a small temperature variation. This unique property makes them invaluable in various applications such as passive heating and cooling systems, building thermal management, and photo-to-thermal conversion. − Within various PCMs, poly(ethylene glycols) (PEGs) possess the advantages of high phase change enthalpy and thermal reliability, suitable phase change temperature, nontoxicity, and low cost . However, pure PEGs as well as other pure PCMs usually exhibit intrinsically poor photo-to-thermal conversion ability.…”

Section: Introductionmentioning

confidence: 99%

Using Carbonized Cotton Fabric Waste to Prepare Poly(ethylene glycol) Composite Phase Change Materials with Improved Thermal Conductivity and Solar-to-Thermal Conversion

Tien Nguyen,

Minh Tam,

Thi Nhung

2024

ACS Omega

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Poly(ethylene glycol) (PEG) boasts excellent thermal energy storage capabilities but lacks efficiency in thermal conductivity and solar absorption. Simultaneously, the escalating concern surrounding the substantial volume of discarded cotton fabric underscores environmental issues. In this study, we devised composite phase change materials (PCMs) by embedding PEG into a carbon cotton material (CCM), varying PEG content from 50 to 80%, and conducted a comprehensive analysis of their thermal properties and solar-to-thermal conversion. The CCM, crafted from a waste 100% cotton towel through carbonization, provided an optimal porous structure that accommodated a significant 70% PEG content without any leakage, thanks to interactions such as surface tension, capillary forces, and interfacial hydrogen bonds. These PEG/CCM composites exhibited impressive crystallization fractions (>92%), resulting in notable thermal energy storage capacities ranging from 85.3 to 143.2 J/g as the PEG content increased from 50 to 80%. Moreover, these composites showed high thermal stability and exceptional cycling durability even after 500 melting/crystallization cycles. Notably, their thermal conductivities markedly increased to a range of 0.46−0.85 W/m•K compared to pure PEG's modest 0.24 W/m•K. Furthermore, the PEG/CCM composites substantially augmented visible and near-infrared (VIS-NIR) light absorption. Evaluation of solar-to-thermal conversion illustrated the composite's ability to efficiently convert solar energy into thermal energy, storing and subsequently releasing it through melting and crystallization processes. This study introduces a novel class of composite PCMs characterized by cost-effectiveness, outstanding thermal performance, and impressive solar-to-thermal conversion capabilities. These composite PCMs hold significant promise for large-scale solar-to-thermal energy storage applications while contributing to the sustainability of cotton waste management.

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“…Simultaneously, porous supports serve to confine PCMs within nanopores, preventing potential leakage in liquid form through the capillary and surface tension forces . Various porous supports, including SiO 2 , polymers, carbonaceous materials, metal foams, and aerogels, are commonly employed for confining PCMs. − Among these options, SiO 2 is widely favored for its tunable porous structure, high thermal stability, wide availability, and nontoxic nature . Furthermore, SiO 2 has demonstrated the capability to adsorb substantial amounts of PCMs, reaching up to 70–80%, thereby offering high thermal energy storage capacity for resulting SSPCMs. , Notably, the SiO 2 prepared by Li et al achieved stabilization of up to 97% PEG, marking the highest PCM loading level reported.…”

Section: Introductionmentioning

confidence: 99%

Polyethylene Glycol/Rice Husk Ash Shape-Stabilized Phase Change Materials: Recovery of Thermal Energy Storage Efficacy via Engineering Porous Support Structure

Tien Nguyen,

Van Phuoc,

Thi Nhung

et al. 2024

ACS Omega

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This study focuses on modifying the porous structure of acid-treated rice husk ash (ARHA) to enhance the thermal energy storage capacity of poly(ethylene glycol) (PEG) confined within shape-stabilized phase change materials. The modification process involved a cost-effective sol−gel method in which ARHA was initially dissolved in an alkaline solution and subsequently precipitated in an acidic environment. ARHA, being a mesoporous SiO 2 -based material with a high surface area but low pore volume, had limited capacity to adsorb PEG (50%). Furthermore, it hindered the crystallinity of impregnated PEG by fostering abundant interfacial hydrogen bonds (H-bonds), resulting in a diminished thermal energy storage efficiency. Following modification of the porous structure, the resulting material, termed mARHA, featured a three-dimensional macroporous network, providing ample space to stabilize a significant amount of PEG (70%) without any leakage. Notably, mARHA, with a reduced surface area, effectively mitigated interfacial H-bonds, consequently enhancing the crystallinity of impregnated PEG. This modification led to the recovery of thermal energy storage efficacy from 0 J/g for PEG/ARHA to 109.3 J/g for PEG/mARHA. Additionally, the PEG/mARHA composite displayed improved thermal conductivity, reliable thermal performance, and effective thermal management when used as construction materials. This work introduces a straightforward and economical strategy for revitalizing thermal energy storage in PEG composites confined within RHA-based porous supports, offering promising prospects for large-scale applications in building energy conservation.

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A review of phase change materials and heat enhancement methodologies

Cited by 10 publications

References 161 publications

The theoretical approach of the solar organic Rankine cycle integrated with phase change material for the Hungarian region

The theoretical approach of the solar organic Rankine cycle integrated with phase change material for the Hungarian region

Using Carbonized Cotton Fabric Waste to Prepare Poly(ethylene glycol) Composite Phase Change Materials with Improved Thermal Conductivity and Solar-to-Thermal Conversion

Polyethylene Glycol/Rice Husk Ash Shape-Stabilized Phase Change Materials: Recovery of Thermal Energy Storage Efficacy via Engineering Porous Support Structure

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