高温复合相变材料储热电暖器的储热性能

doi:10.12028/j.issn.2095-4239.2017.0066

储能科学与技术 ›› 2017, Vol. 6 ›› Issue (4): 739-747.doi: 10.12028/j.issn.2095-4239.2017.0066

高温复合相变材料储热电暖器的储热性能

李传1，司艳阳2，冷光辉1，许永2，丁玉峰2，翁立奎2，丁玉龙1

1英国伯明翰大学储能中心，英国伯明翰 B15 2TT；2南京金合能源材料有限公司，江苏南京 210008

收稿日期:2017-05-23 修回日期:2017-06-08 出版日期:2017-07-01 发布日期:2017-07-01
通讯作者: 丁玉龙，教授，主要研究方向为储能系统、储能过程中多相流动与传热强化、无机中高温复合储能材料、深冷（液化）空气储能、压缩空气储能等，E-mail：y.ding@bham.ac.uk。
作者简介:李传（1986—），男，博士后研究员，主要研究方向为多相流动和传热强化与优化、储能材料和储能单元/装置研究与优化设计， E-mail：c.li.4@bham.ac.uk
基金资助:
英国工程与自然科学研究委员会项目（EP/L019469/1，EP/L014211/1）

Charging behavior of an electrical storage heater using a high temperature composite phase change material

LI Chuan1, SI Yanyang2, LENG Guanghui1, XU Yong2, DING Yufeng2, WENG Likui2, DING Yulong1

1Birmingham Centre for Energy Storage, University of Birmingham, Birmingham B15 2TT, Birmingham, UK; 2Nanjing Jinhe Energy Materials Co., Ltd., Nanjing 210008, Jiangsu, China)

Received:2017-05-23 Revised:2017-06-08 Online:2017-07-01 Published:2017-07-01

摘要/Abstract

摘要： 本文研究了基于高温复合相变材料的相变储热电暖器，对其储热性能、内部流场和温度分布及温度调控机制进行了实验和模拟研究，并与镁砖显热电暖器的储热性能进行对比。结果表明这类相变储热电暖器的储热平均温度高、平均温差小、出风口温度高，整体性能要优于镁砖显热电暖器。相同体积下两种电暖器储热量相当，但相变储热电暖器的重量可减轻1.6倍；在相同储热时间和储热温度下，同等重量的相变储热电暖器较镁砖电暖器可多储热68%。结果也展示了这类储热电暖器温度控制测点选择的重要性，当选取距离加热单元10 mm处的测点作为温度调控点时，电暖器内的平均温度和储热砖体的最高温度均能满足安全要求，而且加热单元电源在谷电8 h储热过程中只需启停两次。

关键词: 高温相变, 复合相变材料, 电暖器, 储热性能

Abstract: The work reported in this paper concerns the charging behaviour of an electrical storage heater using a high temperature composite phase change material (CPCM). A mathematical model was developed to study the transient heat transfer behavior of the composite PCM bricks. The model was validated experimentally. The results showed that the CPCM based electrical storage heater offered a better performance that was superior to MgO-based electrical storage heater. For a given volume, the same power rating, and the same amount of stored heat, the mass of the MgO based electrical storage heater exceeded 1.6 times that of the CPCM based storage heaters. For the same mass and the same power rating, the heat storage capacity of the CPCM based electrical storage heater was 68% higher than that of MgO-based unit. The results also indicated the importance of temperature control strategy. It was found that the average temperature and the maximum temperature inside the electrical storage heater could meet the requirements if the control temperature measurement point was selected to be 10 mm away from the heating elements. In such a case, heating elements only had two start-stops over the 8-hour charging period.

Key words: high temperature, composite phase change materials, thermal energy storage, heat storage electrical heater

李传1，司艳阳2，冷光辉1，许永2，丁玉峰2，翁立奎2，丁玉龙1. 高温复合相变材料储热电暖器的储热性能[J]. 储能科学与技术, 2017, 6(4): 739-747.

LI Chuan1, SI Yanyang2, LENG Guanghui1, XU Yong2, DING Yufeng2, WENG Likui2, DING Yulong1. Charging behavior of an electrical storage heater using a high temperature composite phase change material[J]. Energy Storage Science and Technology, 2017, 6(4): 739-747.

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高温复合相变材料储热电暖器的储热性能

Charging behavior of an electrical storage heater using a high temperature composite phase change material

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