探讨相变储能建筑材料的应用技术进展

本文以相变储能建筑材料为研究对象,着眼于建筑材料施工实际,从相变储能材料基本情况分析、相变储能材料应用于建筑领域的价值分析、相变储能建筑材料的应用技术分析以及相变储能建筑材料的应用展望分析这几个方面入手,围绕相变储能建筑材料的应用技术进展这一中心问题展开了较为详细的分析与阐述,并据此论证了相变储能材料在建筑作业中所发挥的关键作用与意义。     

高温相变蓄热材料研究进展

本文通过对高温相变蓄热材料国内外研究现状进行分析,提出探索高温相变蓄热过程热力学行为特性,建立热-结构耦合分析模型,并与实验研究相结合,是弄清相变过程热力学机理、掌握相变蓄热技术、进行吸热/蓄热器和热控系统以及相变蓄热容器合理设计的关键,并将为最终在太阳能发电、高温热能回收、航天以及冶金等其它工业领域的技术应用奠定基础。     

相变材料在零能耗太阳能住宅中的应用研究——以国际太阳能十项全能竞赛作品为例

相变材料具有相变潜热大的特性,能够提高轻型围护结构建筑的热稳定性,改善热环境并且节约能耗,在建筑节能领域受到越来越多的关注。主要介绍了相变材料的概况、主要影响因素以及研究现状,并将相变材料应用于建筑的模式分为两种——被动式应用和主动式应用,同时以历届国际太阳能十项全能竞赛的参赛作品为研究对象,对作品中相变材料的应用进行分类研究,以期对绿色建筑设计起到一定的借鉴作用。     

相变材料的基本理论及其在建筑节能领域的应用

参考国内外文献,对相变材料的分类、相变形式、不同相变材料的优缺点以及选择相变材料的相关依据进行论述.鉴于我国建筑能耗逐年上升的趋势,研究相变材料在建筑节能领域的应用具有重要意义.     

建筑节能相变材料应用研究现状及发展

相变材料在建筑行业中的应用是一项降低建筑能耗的重要措施。本文介绍了建筑节能相变材料的定义、性能特点及分类,分析了建筑节能相变材料的国内外应用研究现状,并总结出建筑节能相变材料应用研究亟待解决问题,提出了相变材料的应用发展趋势,进而为相变材料在建筑行业中降低能耗的应用提供参考。     

相变材料在大体积混凝土中应用的研究现状

在总结国内外对相变材料及其在混凝土领域中应用的基础上,介绍相变材料的分类和不同相变材料的优缺点,概述了相变材料对混凝土的控温理论以及相变控温混凝土的研究进展,重点介绍了相变材料的封装技术。对该研究领域存在的一些问题进行了总结,并对相变材料在混凝土中应用研究提出建议。     

相变储能技术的研究和发展

相变储热技术是利用低品位能源，实现建筑节能的重要途径。相变储能在建筑节能和暖通空调领域中的应用越来越受到重视，已成为国际研究的热点。研究了在储能领域使用较为广泛的相变材料的种类及其特点。分析了国内外相变储能理论与技术的发展现状以及相变材料在建筑围护结构、太阳房供暖系统、电热蓄热系统及蓄冷空调中的应用。展望了相变材料在蓄能技术方面的发展前景。     

相变材料蓄能研究进展及其应用

低碳经济下,研究高效而经济的蓄能技术成为摆在各国学者面前的共同课题,其中相变材料的研究近年来尤其成为热点。本文总结并评价了相变材料蓄能技术的研究进展,包括相变材料的分类、热物性及特点,强化传热机理的分析以及相变传热数学物理模型的建立等热物理问题,在此基础上,归纳了相变材料在诸多领域的应用情况和前景,希望为该领域研究者提供参考。     

相变蓄热材料及其在低能耗建筑中的应用

介绍了我国建筑能耗的现状以及相变材料的分类、特性、选择方法和新发展。分析了相变材料在低能耗建筑中的应用现状及其存在的问题和研究的热点方向。最后指出相变材料在建筑中的应用是未来实现建筑节能的重要途径之一。     

应用于绿色建筑的相变材料与微胶囊相变材料热工性能优化研究

相变材料具有储能密度高、温度波动小的特点,在绿色建筑的暖通空调、新能源利用以及换热器等领域有着广阔的应用前景。文章研究了相变材料的热工性能,并分析相变材料在建筑节能中的应用。制备了以水和聚乙二醇400为基液的相变微乳液与相变微胶囊悬浮液,测定了其导热系数、静置后浊度等参数,从而研究改良基液对相变微胶囊悬浮液与相变乳状液热工性能的影响。实验表明水和聚乙二醇400基液分别降低了浓度15%、30%、40%的相变微胶囊悬浮液静置后浊度26.5%、23.0%、2.5%,提高了悬浮液稳定性并保持较高的导热系数,更加适用于绿色建筑。     

Effect of double layer phase change material in building roof for year round thermal management

Efficient and economical technology that can be used to store large amounts of heat or cold in a definite volume is the subject of research for a long time. Latent heat storage in a phase change material (PCM) is very attractive because of its high-energy storage density and its isothermal behavior during the phase change process. Thermal storage plays a major role in building energy conservation, which is greatly assisted by the incorporation of latent heat storage in building products. Increasing the thermal storage capacity of a building can enhance human comfort by decreasing the frequency of internal air temperature swings so that the indoor air temperature is closer to the desired temperature for a longer period of time. However, it is impossible to select a phase change material to suit all the weather condition in a given location. The PCM that reduces the internal air temperature swing during the winter season is not suitable for the summer season as the PCM remains in the liquid state at all the times during these months and hence the system cannot exploit the latent heat effect. This paper attempts to study the thermal performance of an inorganic eutectic PCM based thermal storage system for thermal management in a residential building. The system has been analyzed by theoretical and experimental investigation. A double layer PCM concept is studied in detail to achieve year round thermal management in a passive manner.     

Energiespeicherbeton – ein Beton mit integriertem Latentwärmespeichermaterial

Energy storage concrete – a concrete with integrated latent heat storage material. In times of solar architecture and increased utilisation of renew‐able energy, building components with high thermal heat storage capability are becoming increasingly important. One of the areas future research in building physics and building services will focus on is the development of energy storage units. A particularly interesting research area is latent heat storage. This essay describes the development of a concrete with integrated latent heat storage material (phase change material, PCM) as part of a thesis. This innovative concrete offers significantly improved thermal characteristics. For example, it was possible to more than double the heat capacity within a temperature range of 10 Kelvin around the melting point of the PCM. The PCM has a melting point between approx. 22 °C and 35 °C, depending on application. A highly versatile material such concrete offers a wide range of application options. In principle, it is possible to use latent heat storage concrete to supplement heating systems, to extend the scope of passive solar systems, or to protect against overheating in summer.     

Experimental investigation of wallboard containing phase change material: Data for validation of numerical modeling

In construction, the use of phase change materials (PCM) allows the storage/release of energy from the solar radiation and/or internal loads. The application of such materials for light weight construction (e.g. a wood house) makes it possible to improve thermal comfort in summer and reduce heating energy consumption in winter. The choice of a PCM depends deeply on the building structure, on the weather and on building use: numerical modeling is indispensable. In this paper, an experimental comparative study is described, using cubical test cells with and without PCM composite. A set of experimental data is detailed, concerning the air and wall temperatures. The results are compared with a numerical modeling and show that hysteresis must be taken into account to predict correctly the heat transfer.     

建筑节能新技术--相变储能建筑材料

潜热储存具有较高的容积蓄热密度,在建筑节能、太阳能利用、余热回收和电力移峰填谷等领域具有重要价值。相变储能建筑材料是通过向传统建筑材料中加入相变材料制成的。相变材料具有较大的潜热储存能力。介绍了相变储能建筑材料的发展历史,研究方法和当前存在问题,以及目前值得深入研究的课题。     

银川地区被动式太阳房的室温预测

被动式太阳房是一种经济有效地利用太阳能采暖的建筑,银川地区太阳能热水器已经得到了广泛的应用,但被动式太阳房的应用较少。本文对银川地区直接受益窗与集热蓄热墙的组合式太阳房的室内温度进行预测,分析其热舒适性,以便今后更近一步的研究。     

浅论太阳能建筑

分析了在建筑中利用太阳能的必要性及可能性，指出太阳能建筑的应用应符合今后世界建筑发展的方向，太阳能建筑的发展经历了主动式太阳房、被动式太阳房以及零能房屋三个阶段，阐述了太阳能建筑在国外的发展概况以及在我国对于主动式太阳房和被动式太阳房的研究和已取得的成就，指出其具有良好的发展前景。     

Eutectic mixtures of capric acid and lauric acid applied in building wallboards for heat energy storage

Capric acid (CA) and lauric acid (LA), as phase change materials (PCM), can be applied for energy storage in low temperature. The phase transition temperature and values of latent heat of eutectic mixtures of CA and LA are suitable for being incorporated with building materials to form phase change wallboards used for building energy storage. 120, 240 and 360 accelerated thermal cycle tests were conducted to study the changes in latent heat of fusion and melting temperature of phase change wallboards combined with the eutectic mixtures of CA and LA. Differential scanning calorimetry (DSC) tested the transition temperature and latent heat. The results showed that the melting temperature and latent heat of these phase change wallboards with eutectic mixtures have not obvious variations after repeated 360 thermal cycles, which proved that these phase change wallboards have good thermal stability for melting temperature and variations in latent heat of fusion for long time application. Therefore, they can be used for latent heat storage in the field of building energy conservation.     

自然能高效利用与夏热冬冷地区居住建筑布局特点

分析了被动式建筑节能模式的建筑布局需考虑的因素,介绍了太阳能热水系统、土壤源热泵系统和水源热泵系统在应用时的建筑特点,并给出了被动式和主动式自然能利用的建筑布局特点,为夏热冬冷地区自然能利用提供参考。     

Development and validation of a new TRNSYS type for the simulation of external building walls containing PCM

In building construction, the use of phase change materials (PCMs) allows the storage/release of energy from the solar radiation and/or internal loads. The application of such materials for lightweight construction (e.g., a wood house) makes it possible to improve thermal comfort and reduce energy consumption. However, in order to assess and optimize phase change materials included in building wall, numerical simulation is mandatory. For that purpose, a new TRNSYS Type, named Type 260, is developed to model the thermal behavior of an external wall with PCM. This model is presented in this paper and validated using experimental data from the literature.     

Thermal performance comparisons between passive solar and conventional housing in an Irish climate

The thermal performance of a passive solar house in Ireland having high energy conservation standards is compared with that of a similar sized conventional dwelling house. In both cases the performance over a meteorological Test Reference Year is assessed using climatically responsive models developed experimentally which predict their internal temperature without heating.

The results indicate that the conventional house required over three times as much auxiliary heating as the passive solar house. Solar gain accounted for over half the gross heat demand in the solar house compared to 13% in the bungalow. An added advantage of the increased utilization of solar gain was the estimated reduction in the heating season from nine to six months.