相变材料的特点及热物性分析

doi:10.12068/j.issn.1005-3026.2023.04.007

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (4): 510-516.DOI: 10.12068/j.issn.1005-3026.2023.04.007

相变材料的特点及热物性分析

库尔班江·乌丝曼^1,2，戴晓业²，史琳²

(1. 新疆大学电气工程学院，新疆乌鲁木齐830046; 2. 清华大学能源与动力工程系，北京100084)

发布日期:2023-04-27
通讯作者: 库尔班江·乌丝曼
作者简介:库尔班江·乌丝曼(1985-)，男，新疆喀什人，新疆大学讲师，清华大学博士研究生；史琳(1964-)，女，河南洛阳人，清华大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(52176011，52236003)；国家重点研发计划项目 (2016YFB0901405).

Characteristics of Phase Change Materials and Analysis of Thermal Properties

WUSIMAN Kuerbanjiang^1,2， DAI Xiao-ye²， SHI Lin²

1. School of Electrical Engineering， Xinjiang University， Urumqi 830046， China; 2. Department of Energy and Power Engineering， Tsinghua University， Beijing 100084， China.

Published:2023-04-27
Contact: SHI Lin
About author:-
Supported by:
-

摘要/Abstract

摘要： 相变材料(phase change materials，PCMs)是潜热储热技术的核心储热媒介，因此选择合适的PCMs需综合考虑到多种因素，而相变温度、储能密度和导热系数是衡量PCMs适用性的最关键因素.对典型的固-液相变的不同类型PCMs特点进行了归纳和比较，结果证明研究多种高性能兼容的复合材料是PCMs应用的发展方向.通过理论分析得出:在设定工作温差50℃范围内常用PCMs相变潜热≥100kJ/kg时，单位质量储热密度与PCMs的相变温度不再相关；PCMs的相变温度越高，系统的有效输出温度范围越宽，系统输出越灵活；PCMs的相变潜热越大，系统在有效温度范围变化时释热效率越稳定.因此在50℃工作温差范围内选择相变潜热高、兼顾较高的固液平均比热容和相变温度高的PCMs时系统的输出性能更优越.

关键词: 潜热;PCMs;储热密度;相变温度;效率

Abstract: Phase change materials (PCMs) are the core media of energy storage for latent heat storage. Thus， screening of appropriate PCMs needs to take into consideration a variety of factors， whereas phase transition temperature， energy storage density and thermal conductivity are the most critical factors during assessment of feasibility for PCMs. As evident by summarizing and comparing the characteristics of different categories of typical solid-liquid PCMs， multi-high-performance compatible composite materials is the development direction for PCMs’ applications. Finally， based on the theoretical analysis， it concluded as that within the range of specified working temperature difference of 50℃， the heat storage density per unit mass of common PCMs is no longer correlated with it’s phase transition temperature when latent heat is ≥100kJ/kg， and the higher of phase transition temperature of PCMs is， the wider range of the effective output temperature can be obtained by the system， and more flexible output of system becomes. The larger the latent heat of PCMs is， the more stable the heat discharging efficiency of the system is while varying the effective temperature. Therefore， within the temperature difference of 50℃， the thermal energy storage system gains rather superior output performance with selection of PCMs under considering of it’s higher latent heat， competitive average solid-liquid specific heat and higher phase transition temperature.

Key words: latent heat; phase change materials (PCMs); heat storage density; phase transition temperature; efficiency

中图分类号:

TK02

库尔班江·乌丝曼，戴晓业，史琳. 相变材料的特点及热物性分析[J]. 东北大学学报（自然科学版）, 2023, 44(4): 510-516.

WUSIMAN Kuerbanjiang， DAI Xiao-ye， SHI Lin. Characteristics of Phase Change Materials and Analysis of Thermal Properties[J]. Journal of Northeastern University(Natural Science), 2023, 44(4): 510-516.

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相变材料的特点及热物性分析

Characteristics of Phase Change Materials and Analysis of Thermal Properties

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