Increasing the electrical efficiency and thermal management of a photovoltaic module using expanded graphite (EG)/paraffin-beef tallow-coconut oil composite as phase change material

Karami, B.; Azimi, Neda; Ahmadi, Shahin

doi:10.1016/j.renene.2021.06.067

Cited by 45 publications

(7 citation statements)

References 59 publications

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“…As mentioned before, the model is interpretive and cannot predict the recovery rate/characteristics of the SMPs. According to Equation (11), some physical/mechanical parameters of the system constituents (Figure 2) should be defined at the process temperature (e.g., the tensile modulus and viscosity of polymer phases) before performing the It should be noted that the rheology test was only performed for HDPE while PET is in the solid state at 140 C, the reference temperature for the recovery test. The viscosity (η a ) and tensile modulus (E a ) of the HDPE, as the continuous phase, were indicated to be 2.4 (MPa s) and 16.77 (MPa), respectively, at the process temperature.…”

Section: Resultsmentioning

confidence: 99%

“…Accordingly, based on the mentioned concept, it is proposed that the fixed phase can be also made of nanoparticles or even a secondary polymer phase with specific physical/mechanical characteristics. [3,11] The formation of polymer/particle interphase can substantially enhance the SME in amorphous/semi-crystalline SMPs containing nanoparticles while the phase compatibility has a determinative role in SMPs containing a secondary rigid or physically stable polymer phase. [12] Accordingly, in SMPs containing both nanoparticles and secondary rigid polymer phase, it is important to control and develop the characteristics of the interfacial areas.…”

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confidence: 99%

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Improved thermostimulative shape memory behavior of HDPE/PET immiscible blend‐based polymer nanocomposite using amphiphilic Janus nanoparticles

2022

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In the study, the impact of homogeneously modified (HM) and Janus silica nanoparticles on the thermostimulative shape memory effect of high-density polyethylene/poly(ethylene terephthalate) blend-based polymer nanocomposites (BPN) is investigated. It is shown that the physical/mechanical characteristics of the polymer/polymer interface have a determinative role in defining the shape memory effect of the system. Accordingly, the effect of each nanoparticle type on this region is precisely evaluated and interpreted. The Janus nanoparticles are synthesized via a two-step desymmetrization process in Pickering emulsion, using different polar/apolar silane agents, while a single-step modification procedure is used to perform the homogenous modification. The designing stages of a comprehensive analytical model are discussed which is used to evaluate the corporation level of the HM and Janus nanoparticles in the recovery mechanism of the BPN samples. The results of different characterizing tests (e.g., tensile, recovery, dynamic mechanical thermal analysis, rheology, etc.) are proposed to demonstrate the impact of different types of nanoparticles on the polymer/polymer interface and shape memory effect (SME) in each sample. It is proved that the BPN samples containing Janus nanoparticles have the strongest SME, in both stretching and bending modes, even better than similar systems containing small molecule compatibilizers.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Improved thermostimulative shape memory behavior of HDPE/PET immiscible blend‐based polymer nanocomposite using amphiphilic Janus nanoparticles

2022

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“…A novel PCM composite is introduced for thermal management of a PV module. [77] Mixture of beef PBTCO is used as an efficient PCM.…”

Section: Pv-pcm Beef Tallow-coconut Oil-paraffinmentioning

confidence: 99%

“…PV cell can operate near their rated power for 3.5–4 h, maintaining a consistently high power output and generating 7.9% more power than PV cell alone. Karami et al [ 77 ] prepared a paraffin–beef tallow–coconut oil (PBTCO)‐based composite PCM for PV thermal regulation. EG was added to PBTCO to improve its thermal conductivity.…”

Section: Pv Thermal Management Systems Integrated With Pcmsmentioning

confidence: 99%

Recent Advances in Photovoltaic and Photovoltaic Thermal Technologies of Integrated Phase‐Change Materials: A Review

Fang,

Zhang,

Liu

et al. 2024

Solar RRL

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Photovoltaic (PV) cells convert solar energy into electricity is currently the cleanest and most economical way to generate electricity. Nevertheless, just a portion of the solar power can be transformed into electrical energy, while the remaining portion is converted into heat, leading to an increase in the temperature of the PV cells. The rise in temperature will not only cause a decrease in the electrical efficiency of PV cells, but it may also impact their lifespan. By placing phase change materials (PCMs) on the back of the PV cells, it is possible to decrease the temperature increase and enhance the electrical efficiency. The heat collected by PCMs can also be taken away using liquid cooling and put to use. In this paper, the classification, performance evaluation and composite modification technology of PCMs are introduced in detail. The practical application requirements of PCMs in thermal management of PV cells are discussed, and some new ideas of applying PCMs to PV cells are prospected. Moreover, the prior investigations regarding the incorporation of PCMs with PV systems and PV/T systems have also been compiled, encompassing the various research perspectives and methodologies employed. In addition, the possible development direction in the future is prospected.This article is protected by copyright. All rights reserved.

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“…Madadi Avargani et al applied the encapsulated paraffin wax to the solar hot water system, which can deliver up to 1200 L of hot water at the required temperature for more than 8 h. Luo et al compounded acidified sepiolite with paraffin by vacuum impregnation and found that the PCM has reliable energy storage and temperature regulation performance. The thermal application properties of CPCMs involving fatty acids and paraffin wax have also been deeply studied in other literature studies. − However, little research has been done on the application of PCMs for the insulation of interior walls in the hot-summer and cold-winter zones.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performances and Stability of Capric Acid–Stearic Acid–Paraffin Wax Adsorbed into Expanded Graphite in Vacuum Conditions

Guo,

Fei,

et al. 2024

J. Phys. Chem. C

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A new form-stable composite phase change material (CPCM) of capric acid-stearic acid-paraffin wax/expanded graphite (CSPW/EG) was prepared by vacuum adsorption. CSPW has a minimum crystallization temperature of 21.9 °C at the eutectic mass proportion of 74.7:8.3:17 by the step cooling curve method and has a phase change temperature of 25.27 °C and an enthalpy of 126.82 J/g by differential scanning calorimetry (DSC). The mixing proportion of CSPW to EG was determined to be 10:1 based on the enthalpy change and leakage of CPCMs; the enthalpy and phase transition temperature of CSPW/EG were 119.26 J/g and 27.14 °C, respectively. The microstructure, crystal structure, and chemical structure of CSPW/EG were characterized by using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The initial weight loss temperature of CSPW/EG was 159.8 °C, which is far beyond the working temperature. The heat storage-release experiments and 1000 melting−solidification cycles also confirmed that CSPW/EG has excellent heat energy storage and temperature control ability, thermal reliability, and great potential in practical engineering heat storage applications.

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Increasing the electrical efficiency and thermal management of a photovoltaic module using expanded graphite (EG)/paraffin-beef tallow-coconut oil composite as phase change material

Cited by 45 publications

References 59 publications

Improved thermostimulative shape memory behavior of HDPE/PET immiscible blend‐based polymer nanocomposite using amphiphilic Janus nanoparticles

Improved thermostimulative shape memory behavior of HDPE/PET immiscible blend‐based polymer nanocomposite using amphiphilic Janus nanoparticles

Recent Advances in Photovoltaic and Photovoltaic Thermal Technologies of Integrated Phase‐Change Materials: A Review

Thermal Performances and Stability of Capric Acid–Stearic Acid–Paraffin Wax Adsorbed into Expanded Graphite in Vacuum Conditions

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