Novel approaches and recent developments on potential applications of phase change materials in solar energy

Pandey, A.K.; Hossain, M.S.; Tyagi, V.V.; Rahim, Nasrudin Abd; Jeyraj, A; Selvaraj, Laveen Prabhu; Sarı, Ahmet

doi:10.1016/j.rser.2017.09.043

Cited by 352 publications

(120 citation statements)

References 190 publications

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“…To tackle this problem, renewable energy is employed as an alternative mode of electrical power generation. Among the renewable energy options, photovoltaic solar power is getting more and more popular nowadays due to its abundantly available and inexhaustible nature [1][2][3][4][5]. The non-involvement of mechanical or moving parts in a photovoltaic power system also makes it more preferable than other renewable energy options [6].…”

Section: Introductionmentioning

confidence: 99%

Impact of Partial Shading on the P-V Characteristics and the Maximum Power of a Photovoltaic String

et al. 2018

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Abstract:A photovoltaic system is highly susceptible to partial shading. Based on the functionality of a photovoltaic system that relies on solar irradiance to generate electrical power, it is tacitly assumed that the maximum power of a partially shaded photovoltaic system always decreases as the shading heaviness increases. However, the literature has reported that this might not be the case. The maximum power of a partially shaded photovoltaic system under a fixed configuration and partial shading pattern can be highly insusceptible to shading heaviness when a certain critical point is met. This paper presents an investigation of the impact of partial shading and the critical point that reduce the susceptibility of shading heaviness. Photovoltaic string formed by series-connected photovoltaic modules is used in this research. The investigation of the P-V characteristic curve under different numbers of shaded modules and shading heaviness suggests that the photovoltaic string becomes insusceptible to shading heaviness when the shaded modules irradiance reaches a certain critical point. The critical point can vary based on the number of the shaded modules. The formulated equation in this research contributes to determining the critical point for different photovoltaic string sizes and numbers of shaded modules in the photovoltaic string.

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Section: Introductionmentioning

confidence: 99%

Impact of Partial Shading on the P-V Characteristics and the Maximum Power of a Photovoltaic String

et al. 2018

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“…Recently, the scarcity of energy sources has been becoming a global issue . The conventional fossil fuels have almost been depleted worldwide, mainly because of the rapid economic development, population boom and rising thermal comfort levels . Latent heat thermal energy storage (LHTES) system using phase change materials (PCMs) is regarded as one of the most promising technique to reduce the dependency on fossil energy sources .…”

Section: Introductionmentioning

confidence: 96%

Thermal Performance and Interfacial Aspects of Kaolinite‐Based Stearic Acid Composite in the Presence of Nitric Acid

Yang

Zuo

et al. 2019

ChemistrySelect

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The effect of nitric acid on the thermal performance of stearic acid/kaolinite (SA/Kaol) composite phase change materials (PCMs) was studied. SA/Kaol was subjected to HNO3 manipulations at different acidity conditions. The results indicated that inferior thermal properties were detected at the acid‐treated composites with pH < 2. The latent heat value of SA/Kaol‐0.5 demonstrated an obvious reduction of about 30% compared with that of SA/Kaol, and its supercooling extent could reach as many as 11.2 °C while that of SA/Kaol was only 1.4 °C. Based on interfacial reaction analysis, the reduced crystallinity of SA should be attributed to the confinement effect originated from acid molecular clusters, while the supercooling behavior was caused by external ions. These ions could hinder SA molecules from adsorbing to the surface of crystal nucleus and thus delay the solidification process. As a result of segregation effect, the latent heat value of acid‐treated samples was deteriorated but the supercooling extent was relieved during thermal cycles. This work was the first that reported the effect of nitrogen oxides on PCMs. We believe that the results could play an enlightening role in the stability study of thermal property during PCMs practical applications.

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“…Moreover, outdoor temperature changes and daily solar energy can be retrieved using passive solar grids including thermal energy storage (TES) setups . In this regard, compared with sensible heat‐based systems, the popularity of latent heat‐based TES frameworks working by phase change materials (PCMs) is increased day by day because they allow higher heat storage per volume and also provide better management to the released heat …”

Section: Introductionmentioning

confidence: 99%

“…4,5 In this regard, compared with sensible heat-based systems, the popularity of latent heat-based TES frameworks working by phase change materials (PCMs) is increased day by day because they allow higher heat storage per volume and also provide better management to the released heat. [6][7][8][9] Many solid-liquid PCMs (S-LPCMs) include organic and inorganic or their binary/ternary which have been used in various TES purposes such as thermal regulation of buildings, thermal management of foods, storing of waste heat, and cooling of electronic systems and photovoltaic panels. [10][11][12][13] However, the usage of S-LPCMs involves some difficulties such as requirement of storage container to elude liquid leakage, phase separation in blend cases, and low thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Thermal energy storage properties of polyethylene glycol grafted styrenic copolymer as novel solid‐solid phase change materials

2020

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Summary Polymeric solid‐solid phase change materials (S‐SPCMs) are functional materials with phase transition‐heat storing/releasing ability. With this respect, a series of polyethylene glycol (PEG) grafted styrenic copolymer were produced as novel S‐SPCMs. PEGs with three different molecular weights were used for synthesis of isocyanate‐terminated polymers (ITPs). To achieve cross‐linking S‐SPCMs, the ITPs were grafted with styrene‐co‐ally alcohol) (PSAA) at three different PSAA:PEG mole ratios. The produced polymers were characterized using Fourier transform infrared (FT‐IR), proton nuclear magnetic resonance (1H NMR), and X‐ray diffraction (XRD) technique. The crystalline‐amorphous phase transitions of the polymers were examined using polarized optical microscopy (POM). The FT‐IR, NMR, and XRD results confirmed the expected chemical structures and crystallization performances of the polymers. Thermal energy storage (TES) properties of the S‐SPCMs were determined by differential scanning calorimetry (DSC). The DSC results revealed that the polymers with grafting ratio of PSAA:PEG(1:1) had phase transition enthalpies between about 74 and 142 J/g and phase transition temperatures between about 26°C and 57°C. Thermogravimetric analysis (TGA) measurements demonstrated that the S‐SPCMs were resistant to thermal decomposition until about 300°C. Thermal conductivities of the produced S‐SPCMs were measured in a range of about 0.18 to 0.19 W/mK. Furthermore, TES properties of the S‐SPCMs were slightly changed as their chemical structures were remained after 5000 thermal cycles. By overall evaluation of the findings, it can be foreseen that particularly PSAA‐g‐PEG(1:1) polymers can be considered as promising S‐SPCMs for some TES practices such as air conditioning of buildings, thermoregulation of food packages, automobile components, electronic devices, and solar photovoltaic panels.

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Novel approaches and recent developments on potential applications of phase change materials in solar energy

Cited by 352 publications

References 190 publications

Impact of Partial Shading on the P-V Characteristics and the Maximum Power of a Photovoltaic String

Impact of Partial Shading on the P-V Characteristics and the Maximum Power of a Photovoltaic String

Thermal Performance and Interfacial Aspects of Kaolinite‐Based Stearic Acid Composite in the Presence of Nitric Acid

Thermal energy storage properties of polyethylene glycol grafted styrenic copolymer as novel solid‐solid phase change materials

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