文章信息/Info

Title:

Research Progress on Modification of Paraffin-Based Phase Change Energy Storage Materials for Construction

文章編號(hào):

1674-3962(2022)08-0607-10

作者:

史琛1; 王平1; 楊柳2

（1. 西安建筑科技大學(xué)材料科學(xué)與工程學(xué)院，陜西 西安 710055）（2. 西安建筑科技大學(xué)建筑學(xué)院，陜西 西安 710055）

Author(s):

SHI Chen1;  WANG Ping1;  YANG Liu2

(1. School of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China) (2. School of Architecture, Xi’an University of Architecture and Technology, Xi’an 710055, China)

關(guān)鍵詞:

石蠟; 相變儲(chǔ)能材料; 導(dǎo)熱性能; 封裝; 建筑應(yīng)用

Keywords:

paraffin;  phase change energy storage materials;  thermal conductivity;  encapsulation;  architectural application

分類號(hào):

TU599

DOI:

10.7502/j.issn.1674-3962.202102009

文獻(xiàn)標(biāo)志碼:

A

摘要:

隨著人們對(duì)熱舒適需求的日益增加，建筑能耗也隨之增大，目前已經(jīng)成為世界上最大的耗能產(chǎn)業(yè)。針對(duì)熱能儲(chǔ)存系統(tǒng)的研究對(duì)促進(jìn)更有效、更環(huán)保的能源利用具有重要意義。石蠟類相變儲(chǔ)能材料因具有優(yōu)良的熱物理性能而成為建筑節(jié)能方面的研究熱點(diǎn)，如蓄熱密度高、熔點(diǎn)范圍寬、經(jīng)濟(jì)適用性好等，但仍存在固�惨合嘧儠r(shí)易發(fā)生滲漏及導(dǎo)熱性能差等問題。近年來，研究人員致力于開發(fā)性能穩(wěn)定、相變潛熱高和導(dǎo)熱性能優(yōu)異的復(fù)合相變材料，以使其在建筑領(lǐng)域具有更廣闊的發(fā)展前景。通過將石蠟與不同高導(dǎo)熱材料復(fù)合，可以大大提高該復(fù)合相變材料的導(dǎo)熱性能，且不會(huì)發(fā)生泄漏�；�于目前的研究進(jìn)展，首先介紹了石蠟類相變儲(chǔ)能材料的基礎(chǔ)熱物理性能，并根據(jù)石蠟的化學(xué)結(jié)構(gòu)介紹了含不同碳原子數(shù)的石蠟的相變溫度及相變過程。針對(duì)其滲漏的問題，討論了宏觀封裝、微膠囊封裝和多孔材料吸附3種改進(jìn)方式；針對(duì)其導(dǎo)熱性能差的問題，討論了添加高導(dǎo)熱材料、使用不同種類無機(jī)化合物包裹以及浸入多孔高導(dǎo)熱材料中3種強(qiáng)化傳熱的方式。最后，對(duì)石蠟類相變儲(chǔ)能材料在建筑領(lǐng)域的發(fā)展前景進(jìn)行了展望，以期研發(fā)出吸附效果及導(dǎo)熱增強(qiáng)效果更好的高導(dǎo)熱吸附材料，使得石蠟復(fù)合相變材料具有更好的使用性能。

Abstract:

Building energy consumption is increasing with the growth demand for thermal comfort. At present, it has become the largest energy consuming industry in the world, and the research of thermal energy storage system is of great significance to promote more effective and environmentally friendly energy utilization. Paraffin-based phase change energy storage materials have become a research hotspot in building energy conservation because of its excellent thermophysical properties, such as high heat storage density, wide melting point range, good economic applicability and so on. However, the application of paraffin-based phase change materials in building materials is still limited due to the problems of easy leakage when solid-liquid phase change occurs and poor thermal conductivity. In recent years, researchers have been committed to the development of composite phase change materials with stable performance, high latent heat and excellent thermal conductivity, making them more promising in the field of construction. At present, the thermal conductivity of composite phase change materials can be greatly improved without leakage by compounding paraffin with different high thermal conductivity materials. The basic thermophysical properties of paraffin-based phase change materials are summarized, and the phase change temperatures of paraffin with different carbon atoms are introduced according to the chemical structure of paraffin. In addition, the phase change process of paraffin is described in detail, and the three ways of macro encapsulation, microcapsule encapsulation and porous material adsorption are mainly discussed for the leakage of paraffin. For the problem of poor thermal conductivity of paraffin, three ways of heat transfer enhancement are discussed, including adding high thermal conductivity materials, using different kinds of inorganic compounds wrapped and immersed in porous high thermal conductivity materials. This lays a foundation for the better application of paraffin-based phase change materials in building materials. In addition, the development prospect of paraffin-based phase change materials in architecture is prospected, and the research direction of paraffin-based phase change materials in architecture is pointed out, so as to provide reference for the preparation of new composite phase change materials suitable for large-scale application in architecture.