高温相变蓄热电暖器的数值模拟及验证

doi:10.12028/j.issn.2095-4239.2019.0155

储能科学与技术 ›› 2020, Vol. 9 ›› Issue (1): 88-93.doi: 10.12028/j.issn.2095-4239.2019.0155

高温相变蓄热电暖器的数值模拟及验证

马美秀¹(), 李振东², 康伟¹, 曾洪涛¹, 苏铁山¹, 胡荣辉³, 胡晓¹

1. 全球能源互联网研究院有限公司，北京102209
2. 国网青海省电力公司电力科学研究院
3. 青海综合能源服务有限公司，青海西宁 810008

收稿日期:2019-07-08 修回日期:2019-07-25 出版日期:2020-01-05 发布日期:2020-01-10
作者简介:联系人：马美秀（1986—），女，硕士，热能工程师，研究方向为固体蓄热技术，E-mail：mameixiu@163.com。
基金资助:
基于相变储热的分布式电暖气研究与应用(52280717000S)

Numerical simulation and verification of high temperature phase change thermal storage electric heater

MA Meixiu¹(), LI Zhendong², KANG Wei¹, ZENG Hongtao¹, SU Tieshan¹, HU Ronghui³, HU Xiao¹

1. Global Energy Interconnection Research Institute Co. , Ltd. , Beijing 102209, China
2. State Grid Qinghai Eelectric Power Research Institute
3. Qinghai Integrated Energy Service Co. , Ltd. , Xining 810008, Qinghai, China

Received:2019-07-08 Revised:2019-07-25 Online:2020-01-05 Published:2020-01-10

摘要/Abstract

摘要：

根据近年来分布式电采暖的实际应用反馈分析，分布式电暖器升温慢、储热量不足、释热速率过快等因素影响了其在市场上的推广，主要原因在于分布式电暖器的使用环境、用户侧使用情况、电暖器设备本身等。本文基于设备本身原因，研发一种高温相变储热材料作为高温相变蓄热电暖器的储热介质，高温相变储热材料是一种碳酸盐-陶瓷基体复合相变材料，由微多孔通道陶瓷基体和较大黏度的碳酸盐组成，在相变状态下具有稳定的结构。为研究高温相变蓄热电暖器的升温速率、储热量、释热速率及用户使用效果，首先采用商业软件ICEPAK建立高温相变蓄热电暖器的数学模型，对电暖器的加热过程进行数值模拟研究，得到电暖器稳态时的温度分布图、非稳态储热过程温度上升曲线图，通过实验测试得到相同的储热过程升温曲线，从而验证了仿真结果的正确性。为测试高温相变蓄热电暖器的实际使用效果，采用用户侧室温实时在线监测方法，得到的升温曲线与仿真和测试结果一致，且室温保持在18～20 ℃，满足用户用热需求。

关键词: 相变储热材料, 分布式电暖器, 数值模拟

Abstract:

Various factors, including slow temperature rise, insufficient heat storage, and rapid heat release rate, are observed to affect the promotion of distributed electric heating in the market according to the feedback analysis of the practical application of distributed electric heating in recent years. This can be mainly attributed to the user environment of distributed electric heating, including specific user conditions and the electric heating equipment. This study proposes the usage of a high-temperature phase change thermal-storage material as the thermal storage medium for a high-temperature phase change thermal-storage electric heater based on the equipment itself. The proposed material comprises a carbonate ceramic matrix composite, which is composed of a microporous ceramic matrix and carbonate with high viscosity, and exhibits a stable structure in the phase change state. To study the variables, such as the heating rate, heat storage, heat release rate, and user usage effect of a high-temperature phase change heat-storage electric heater, a mathematical model of the high-temperature phase change heat-storage electric heater is initially established using the ICEPAK commercial software. The heating operation of the electric heater is studied via a numerical simulation, and the temperature distribution diagram and temperature increase curve diagram are obtained with respect to a non-steady state heat storage process when the electric heater is in a stable state. Further, the accuracy of the simulation results can be verified using the same heating curve as the heat storage process. Real-time online monitoring method of the user’s room temperature is adopted to test the practical effects of the high-temperature phase change electric heater; the obtained temperature rise curve is consistent with the simulation and test results, and the room temperature is maintained at 18–20 °C, satisfying the heat demand of the users.

Key words: phase change thermal storage material, distributed heater, numerical simulation

中图分类号:

TK 02

马美秀, 李振东, 康伟, 曾洪涛, 苏铁山, 胡荣辉, 胡晓. 高温相变蓄热电暖器的数值模拟及验证[J]. 储能科学与技术, 2020, 9(1): 88-93.

MA Meixiu, LI Zhendong, KANG Wei, ZENG Hongtao, SU Tieshan, HU Ronghui, HU Xiao. Numerical simulation and verification of high temperature phase change thermal storage electric heater[J]. Energy Storage Science and Technology, 2020, 9(1): 88-93.

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材料名称	密度/kg·m^-3	比热容/kJ·（kg·℃）^-1	热传导系数/W·（m·K）^-1
镁砖	2900	1.1	9
相变砖	2050	1.5	3

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高温相变蓄热电暖器的数值模拟及验证

Numerical simulation and verification of high temperature phase change thermal storage electric heater

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