Fabrication and characterization of nano-additives modified microencapsulated phase change materials with high thermal conductivity for thermal energy storage Author links open overlay panel Chenzhen Liu a b, Huanxin Cao c, Peng Yang a b, Kun Huang a b, Zhonghao Rao a b
Phase change materials (PCM) are deemed to be a great option for thermal energy storage (TES) with high energy density, but the low thermal conductivity of numerous PCM candidates, especially organic PCMs, has remained an issue of low power density.
Remarkably, the resulting phase change composites (PCCs) exhibit a directional thermal conductivity of 21.3 W/ (m·K). Furthermore, the high phase change temperature (132 °C) and large phase change entropy (213.47 J/g) enable a large-capacity high-grade thermal energy to be used.
Laaouatni, A. et al. Study of improving the thermal response of a construction material containing a phase change material. J. Phys.: Conf. Ser.745, 032131 (2016). Chen, Y. et al. Efficient shape-stabilized phase-change material based on novel mesoporous carbon microspheres as a matrix for polyethylene glycol: Preparation and thermal properties.
Furthermore, the high phase change temperature (132 °C) and large phase change entropy (213.47 J/g) enable a large-capacity high-grade thermal energy to be used. The developed PCCs, when combined with selected photo-absorbers, exhibit efficient integration of solar-thermal conversion and storage.
This means that the benefit of significantly enhanced thermal conductivity is always accompanied by a reduction in latent heat and specific heat at the expense of TES capability, which has been of interest to a number of current researchers.
As the global energy crisis intensifies, the development of solar energy has become a vital area of focus for many nations. The utilization of phase change materials (PCMs) for photothermal energy storage in the medium temperature range holds great potential for various applications, but their conventional forms face several challenges.
Fabrication and characterization of nano-additives modified microencapsulated phase change materials with high thermal conductivity for thermal energy storage Author links open overlay panel Chenzhen Liu a b, Huanxin Cao c, Peng Yang a b, Kun Huang a b, Zhonghao Rao a b
Phase change energy storage technology, which can solve the contradiction between the supply and demand of thermal energy and alleviate the energy crisis, has aroused a lot of interests in recent years. Due to its high energy density, high temperature and strong stability of energy output, phase change material (PCM) has been widely used in thermal …
Phase change materials (PCM) with high energy storage capacity (i.e., high energy density) are highly demanded as a key material for TES. Analogous to electrochemical …
Phase change energy storage technology, as an efficient method for thermal energy storage, centers on the selection of PCMs. Among various types of PCMs, organic …
Thermal energy storage (TES) technology using phase change materials (PCMs), which can reversibly store and release large amounts of thermal energy, is an efficient technology to ameliorate the energy crisis and environmental problems [[6], [7], [8]].
Thermal energy storage capacity is an important parameter for phase change composites. The thermal energy storage and phase-transition performance of PW/rGCA composites was evaluated, as shown in Fig. 6. Generally, the addition of functional fillers without phase change capability caused the reduction of the phase change enthalpies for ...
Latent heat storage (LHS) using phase change materials (PCMs) is more preferred than sensible heat storage because of isothermal phase change and high energy density and long term durability. PCMs serve as potential energy saving materials in various TES implementations including thermal controlling of buildings, recovery of waste heat, cooling of …
Compared with other energy storage materials, phase change materials (PCMs) are drawing widespread attention because of their high enthalpy and low temperature change. However, its low thermal conductivity, low photo/electro-thermal conversion characteristics, phase separation and easy leakage are still urgent problems. In this work, expanded ...
Phase change materials (PCMs) with high energy storage capacity and small temperature change during phase change process have been widely applied in electronic thermal management, waste heat recovery systems, off-peak power storage systems, and building materials [1], [2], [3], [4].According to their compositions, PCMs can be categorized into …
Phase change materials with high latent heat can bridge the gap between constant energy demand and intermittent supply. However, the intrinsically low thermal conductivity and leakage problems severely limit the charging/discharging rate and cyclic stability in practical applications.
In this paper, a novel carbon fiber/boron nitride (CF/BN)-based nested structure was constructed, and then, a series of poly(ethylene glycol) (PEG)-based phase change composites (PCCs) with high thermal conductivity …
In this study, we demonstrated a novel absorption-polymerization method for synthesizing phase change composites with high thermal conductivity, high enthalpy, and high encapsulation ratio, with leakage-proof properties as well. This was achieved by constructing core-shell microcapsules in the 3D EG networks. The FTIR and SEM results confirmed ...
Graphene is the one-atom-thick carbon sheet with high thermal conductivity (3100–5300 W m −1 K −1) [21], [22], high specific surface area (SSA, ~ 2630 m 2 g −1) [23] and excellent mechanical property [24], [25] perior to other nano-enhanced phase change materials (NePCMs), graphene-based PCMs are available to achieve higher thermal conductivity with …
Metal microspheres doping porous carbon (MMPC), which was prepared using in-situ pyrolysis reduction strategy, could enhance the thermal conductivity of shape-stabilized …
To solve the above problems, a novel kind of thermal sensitive flexible phase change materials with high thermal conductivity are developed and corresponding energy …
To build a high-performance cold storage device integrated into refrigeration, air conditioning, and large energy storage systems, this study presents a high-performance phase change cold storage material based on a combination of expanded graphite (EG) and water and designs a corresponding serpentine tube cold storage unit. By incorporating EG into water, the thermal …
1. Introduction. Thermal energy storage is critical in the energy application due to fossil fuels shortage and intermittent of renewable energy such as solar, wind and tidal energy [1, 2].Phase change materials (PCMs) in thermal energy storage are particularly prominent, which can store latent heat during melting and release latent heat during solidifying [3, 4].
Request PDF | Oriented High Thermal Conductivity Solid–Solid Phase Change Materials for Mid-Temperature Solar-Thermal Energy Storage | As the global energy crisis intensifies, the development of ...
The thermal conductivity of PDMS-OCF/paraffin composite is about 9 times that of pure paraffin. Such excellent thermal conductivity as well as good thermal stability of the PDMS-OCF/PCMs makes it promising candidate for thermal energy storage. Keywords: superhydrophobic; copper foam; phase change material; thermal conductivity
Currently, solar-thermal energy storage within phase-change materials relies on adding high thermal-conductivity fillers to improve the thermal-diffusion-based charging rate, which often leads to limited enhancement of charging speed and sacrificed energy storage capacity. Here we report the exploration of a magnetically enhanced photon-transport-based …
Organic phase change materials (PCMs), which store and release thermal energy in the form of latent heat during the solid/liquid phase change, are often used as TES materials in solar thermal systems due to their low cost, good thermal and chemical stability, relatively high storage density, and small temperature variations during phase change. However, organic …
Phase change materials (PCMs) possess very high heat storage capacity and are capable of maintaining a constant temperature during phase change, which makes them most prominent candidates for solar energy storage systems, heating, and cooling systems. The low thermal conductivity of PCM results in slow heat transfer and low heat storage and release …
Download: Download high-res image (693KB) Download: Download full-size image Fig. 1. Storage and stress-controlled heat release strategy for large thermal hysteresis SMAs. a.Schematic representation of the thermal energy storage and release process in phase change materials, encompassing heat absorption during heating and subsequent heat release …
Phase change materials (PCMs) can be used for efficient thermal energy harvesting, which has great potential for cost-effective thermal management and energy storage. However, the low intrinsic thermal …
Energy storage is another important process of using and improving energy efficiency [[11], [12], [13]].Phase change materials (PCMs) can provide high storage capacity and isothermal behavior for phase change storage systems [[14], [15], [16]].But single inorganic or organic phase change heat storage materials generally have problems of leakage, corrosion, …
The large thermal energy storage capacity, enhanced thermal conductivity and suitable phase change temperature make these composite PCMs promising candidates for …
The prepared PG/paraffin CPCMs exhibited an ultra-high thermal conductivity of 19.27 Wm-1 K −1 at a volume fraction 35.55% of graphite, which is about 76.08 times higher than that of paraffin. The heat conduction mechanism of the PG/paraffin CPCMs are analyzed, and it is found that Maxwell-Eucken model can be used to accurately predict its thermal conductivity. …
In general, this work aims to propose a composite phase change material (CPCM) with excellent-thermal conductivity and stability to meet the needs of high-power density energy storage systems. The porous SiC skeleton with bionic tree-ring structure was first prepared by optimized freeze casting, high-temperature sintering, and then vacuum …
Novel metal coated nanoencapsulated phase change materials with high thermal conductivity for thermal energy storage Author links open overlay panel Yalin Zhu a b, Yu Chi b, Shuen Liang b, Xuan Luo a, Keping Chen b, Chunrong Tian b, Jianhua Wang b, Lin Zhang a
Phase change materials (PCMs) offer promising applications in thermal management. However, it is a significant challenge to fabricate PCMs with high thermal …
Honeycomb-like structured biological porous carbon encapsulating PEG: a shape-stable phase change material with enhanced thermal conductivity for thermal energy storage Energ. Buildings, 158 ( 2018 ), pp. 1049 - 1062, 10.1016/j. enbuild.2017.10.078
Organic phase change materials (PCMs), with inherent capability to charge and discharge latent heat via solid–liquid phase transformation, have obtained significant progress in the development of state-of-the-art thermal energy storage (TES) systems, finding applications in various strategic and frontier domains such as deep-space detection [1], military technologies …
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