共查询到20条相似文献,搜索用时 0 毫秒
1.
Recent progress and prospective of medium and high temperatures thermal energy storage materials 下载免费PDF全文
开发中高温储热材料及其制备方法是储热技术发展的关键之一.本文结合中高温储热材料的分类,特点,应用及存在的问题对中高温储热材料的研究进展进行了综述,主要包括显热储热材料,热化学储热材料以及潜热储热材料.探讨了复合结构储热材料及其制备工艺,进一步介绍了其最新研究进展,并对中高温储热材料的下一步研究进行了展望,提出开发高性能纳微复合结构储热材料是未来研究的重点. 相似文献
2.
3.
4.
LENG Guanghui LAN Zhipeng GE Zhiwei QIN Yue JIANG Zhu YE Feng DING Yulong 《储能科学与技术》2015,4(2):119-130
本文结合储热材料的分类、特点、应用及存在的问题对储热材料的最新研究进展进行了综述,主要包括有机相变储热材料、熔融盐类相变储热材料、合金相变储热材料及复合类储热材料。探讨了储热材料成分组成、制备工艺及性能特点,进一步介绍了其最新研究进展,并对储热材料的下一步研究进行了展望,提出开发高性能纳微复合结构储热材料是未来研究的重点。 相似文献
5.
Recent progress in diatomite based composite phase change materials for thermal energy storage 下载免费PDF全文
硅藻土是一种含量丰富的非金属矿,具有较高的孔隙率,良好的表面结构和热物理性能,因而可作为复合储热材料的载体.本文综述了复合储热材料的种类和制备工艺,并介绍了硅藻土的结构,性能和以硅藻土为载体的复合相变储热材料的研究及应用现状. 相似文献
6.
7.
建筑的能源成本随着建筑规模的不断扩大在不断提升,因此找到节能环保、价格低廉的建筑材料非常重要.为此,研究了复合相变储热材料在建筑节能中的应用这一课题.复合相变储热材料在混凝土中的应用,增强了混凝土的蓄热能力;运用在保温墙中,可以提升保温墙的控温能力;最后将复合相变储热材料与涂料相融合,提升了涂料的黏结强度.通过实例分析... 相似文献
8.
LI Yongliang JIN Yi HUANG Yun YE Feng WANG Xiang LI Dacheng WANG Caixia DING Yulong 《储能科学与技术》2013,2(1):69-72
简要介绍了储热技术的背景及热力学基础,并据此提出了高品位储热技术的重要性和发展机遇,指出了宽温域高性能储热材料和系统级储热过程优化控制是储热技术发展的新方向. 相似文献
9.
电储热供蒸汽系统使用电加热储热材料,将热能储存在储热材料中,在需要蒸汽的时候,通过各种传热手段将热量从储热材料中取出,与水换热产生蒸汽。本文介绍了目前电储热供蒸汽系统的几种技术路线,并将该技术与常见的几种供蒸汽方式进行了对比,分析认为电储热供蒸汽系统的能源成本较低,但系统初始投资较高。此外,还分析了目前电储热供蒸汽系统的市场及政策环境,认为系统可在电站、工业区能源站、直接用户处应用。 相似文献
10.
Review on the low melting point alloys for thermal energy storage and heat transfer applications 下载免费PDF全文
低熔点合金具有导热系数高,储能密度大,使用温度范围广,性能稳定等特点,是一种潜在的宽温域传热工质和中低温相变储热材料.结合低熔点合金的相变温度,相变潜热,热导率及相变稳定性等热物理性能,综述了低熔点合金相变储热材料的研究进展;介绍了液态低熔点合金传热材料的蒸汽压,表面张力,黏度及比热容等性能,以及低熔点合金在高温下与容器材料的相容性;对低熔点合金传热储热材料的下一步研究进行了展望. 相似文献
11.
12.
13.
Abuelnuor A. A. Abuelnuor Adil A. M. Omara Khalid M. Saqr Ibrahim H. I. Elhag 《国际能源研究杂志》2018,42(6):2084-2103
Phase change materials (PCMs) have great potentials to be used in modern building materials to stabilize indoor temperature fluctuations for improving thermal comfort. This paper presents a comprehensive review on the use of PCMs in buildings to improve thermal comfort without increasing energy consumption. Concise discussions of the experimental and computational works reported in literature are presented. A special focus of this review is devoted to discussing different analysis methods and models used to test, characterize, and measure the performance of PCMs in modern building applications under different conditions. This detailed review also highlights the special attention given to organic PCMs, such as paraffin, due to their favorable properties, such as low price, chemical stability, non‐corrosiveness, and high latent heat of fusion. The review shows the scarcity of literature reporting the use of eutectic PCMs in building applications, despite their high volumetric storage density. 相似文献
14.
With advancement in technology—nanotechnology, various thermal energy storage (TES) materials have been invented and modified with promising thermal transport properties. Solid‐liquid phase change materials (PCMs) have been extensively used as TES materials for various energy applications due to their highly favourable thermal properties. The class of PCMs, organic phase change materials (OPCMs), has more potential and advantages over inorganic phase change materials (IPCMs), having high phase change enthalpy. However, OPCMs possess low thermal conductivity as well as density and suffer leakage during the melting phase. The encapsulation technologies (ie, micro and nano) of PCMs, with organic and inorganic materials, have a tendency to enhance the thermal conductivity, effective heat transfer, and leakage issues as TES materials. The encapsulation of PCMs involves several technologies to develop at both micro and nano levels, called micro‐encapsulated PCMs (micro‐PCM) and nano‐encapsulated PCMs (nano‐PCM), respectively. This study covers a wide range of preparation methods, thermal and morphological characteristics, stability, applications, and future perspective of micro‐/nano‐PCMs as TES materials. The potential applications, such as solar‐to‐thermal and electrical‐to‐thermal conversions, thermal management, building, textile, foam, medical industry of micro‐ and nano‐PCMs, are reviewed critically. Finally, this review paper highlights the emerging future research paths of micro‐/nano‐PCMs for thermal energy storage. 相似文献
15.
Phase change materials (PCMs) with suitable melting ranges for thermal energy storage applications are alkanes, paraffins, fatty acids, eutectic mixtures, and inorganic PCMs. Paraffinic hydrocarbons and fatty acids with low solubility in water are usually the preferred candidates. Pentadecane, which is an alkane hydrocarbon with the chemical formula C15H32, was used as PCM in this study. The pentadecane was microencapsulated with a poly(melamine‐urea‐formaldehyde (MUF)) shell for thermal energy storage. Pentadecane/poly(MUF) microcapsules were prepared by in situ polymerization method. The morphological analysis of pentadecane microcapsules was analyzed with scanning electron microscopy (SEM). Thermal properties of microcapsulated pentadecane were determined by differential scanning calorimetry (DSC). The results demonstrated that pentadecane/PUF microcapsules were prepared successfully, and they offer proper phase transition temperature range (8.7°C and 8.1°C) and heat enthalpy values (84.5 and ?88.2 kJ/kg) for thermal energy storage applications. According to the results, it was determined that pentadecane/poly(MUF) microcapsules have good potential for thermal energy storage applications. 相似文献
16.
In the existent paper, the performance of thermal storage hybrid buildings exploiting the latent heat of phase change materials (PCMs) for thermal refrigeration and heating of the contemporary period has been investigated. The conventional buildings consume a large amount of electricity, primarily for the heating and cooling applications. Electricity generation primarily relies on coal-based thermal power plants. The emissions from these establishments pose a serious threat to the environment. Moreover, conventional heating/cooling units rely on exorbitant energy cost. The usage of any kind of thermal storage system is an efficacious way of stockpiling thermal energy and utilizing it when needed. This paper gives a comprehensive overview of the available thermal storage units incorporating PCMs. The various segments of the buildings, viz, ceiling, window, wall, and floor have been analyzed in details. The results are quite promising in terms of load reduction and overall energy saving. Indoor surface temperature reduction of up to 7oC has been achieved. The energy saving of up to 40% can be realized by employing PCM. A comprehensive list of the PCMs is also tried to build up for end users according to their temperature requirement. 相似文献
17.
Jianli Li Ping Xue Wenying Ding Jinmin Han Guolin Sun 《Solar Energy Materials & Solar Cells》2009,93(10):1761-1767
Six novel polymer-based form-stable composite phase change materials (PCMs), which comprise micro-encapsulated paraffin (MEP) as latent heat storage medium and high-density polyethylene (HDPE)/wood flour compound as supporting material, were prepared by blending and compression molding method for potential latent heat thermal energy storage (LHTES) applications. Micro-mist graphite (MMG) was added to improve thermal conductivities. The scanning electron microscope (SEM) images revealed that the form-stable PCMs have homogeneous constitution and most of MEP particles in them were undamaged. Both the shell of MEP and the matrix prevent molten paraffin from leakage. Therefore, the composite PCMs are described as form-stable PCMs. The differential scanning calorimeter (DSC) results showed that the melting and freezing temperatures as well as latent heats of the prepared form-stable PCMs are suitable for potential LHTES applications. Thermal cycling test indicated the form-stable PCMs have good thermal stability although it was subjected to 100 melt–freeze cycles. The thermal conductivity of the form-stable PCM was increased by 17.7% by adding 8.8 wt% MMG. The results of mechanical property test indicated that the addition of MMG has no negative influence on the mechanical properties of form-stable composite PCMs. Taking one with another, these novel form-stable PCMs have the potential for LHTES applications in terms of their proper phase change temperatures, improved thermal conductivities, outstanding leak tightness of molten paraffin and good mechanical properties. 相似文献
18.
Hamza Faraji Ayman Benkaddour Kenza Oudaoui Mustapha El Alami Mustapha Faraji 《亚洲传热研究》2021,50(2):1443-1493
Phase change materials (PCMs) are used as latent heat thermal energy storage materials. The fields of application for PCMs are broad and diverse. Among these areas are thermal control of electronic components and thermal building regulations. These areas are used as heat and cold storage materials. The low thermal conductivity of PCMs is one of the significant and severe technological problems of PCMs. This paper presents a review of the latest works using PCMs in the thermal management of electronic components, buildings, and heat exchangers. Besides, it provides concise pieces of information on the classification of PCMs, their advantages, disadvantages, and thermal storage systems. 相似文献
19.
相变储热材料是指由于材料相转变吸热或放热过程而本身温度不变,从而实现储能的一类功能材料。有机相变材料如石蜡类、多元醇类及硬脂酸类因无腐蚀、无毒、无过冷等优点已成为重要的低温相变储热材料。这类材料通过固-液相变调节微环境温度,可用于服装、建筑及军事等方面,市场前景广阔。但相变过程易泄漏及热导率低等限制其了实际应用。静电纺丝是有效解决该问题的方法之一,高分子在高压静电作用下形成纤维,相变材料被高分子作为支撑材料所固定,很好地解决了泄漏问题。此外,通过加入高热导率材料可提高相变材料的吸放热速率,改善有机相变材料热导率低的问题。本文总结了近年来静电纺丝用于制备相变调温纤维的研究报道,分析了目前该类材料的研究现状,并讨论未来研究方向。为储热相变材料的进一步研究提供参考。 相似文献
20.
This paper mainly deals with a novel homogeneous phase change process in materials (HPCP). The HPCP is analysed in detail and the expressions for one‐dimensional HPCPs are derived. It is concluded that, compared with the conventional phase change processes, the complete phase change time of HPCPs can be decreased by 60% for a spherical phase change material (PCM), 50% for a cylindrical PCM and 33% for a flat plate PCM, respectively, and the application of HPCPs to thermal energy storage systems can charge or discharge thermal energy with constant rates. Possible applications of HPCPs to thermal energy storage are simulated and further discussed using composite flat plate PCMs. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献