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

doi:10.12028/j.issn.2095-4239.2019.0155

Abstract

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

CLC Number:

TK 02

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.

Figures/Tables 12

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References 6

1	江亿. 华北地区大中型城市供暖方式分析[J]. 暖通空调, 2000, 30(4): 30-32, 45.
	JIANG Yi. Heating schemes analysis for medium and large cities in the North China[J]. Heating Ventilating & Air Conditioning, 2000, 30(4): 30-32, 45.
2	焦春景. 净化首都空气发展电采暖[J]. 华北电业, 2002(4): 18-19.
	JIAO Chunjing. To purify air in the capital and to develop electric heating[J]. North China Power, 2002(4): 18-19.
3	李念平, 潘尤贵, 吉野博. 长沙住宅室内热环境的测试与分析研究[J]. 建筑热能通风空调, 2004, 23(1): 94-98.
	LI Nianping, PAN Yougui, JI Yebo. Field measurement and analysis of indoor thermal environment of changsha urban residential buildings[J]. Building Energy &Environment, 2004, 23(1): 94-98.
4	刘靖, 王馨, 张寅平, 等. 高温相变蓄热电暖器蓄放热性能试验研究[J]. 暖通空调, 2006(3): 62-65.
	LIU Jing, WANG Xin, ZHANG Yinping, et al. Experiment of heat charging and discharging performance of a thermal storage electric heater with high-temperature phase change material[J]. Heating Ventilating & Air Conditioning, 2006(3): 62-65.
5	李传, 司艳阳, 冷光辉, 等. 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(4): 739-747.
	LI Chuan, SI Yanyang, LENG Guanghui, et al. Charging behavior of an electrical storage heater using a high temperature composite phase change material[J]. Energy Storage Science and Technology, 2017(4): 739-747.
6	李传, 葛志伟, 金翼, 等. 基于复合相变材料储热单元的储热特性[J]. 储能科学与技术, 2015(2): 169-175.
	LI Chuan, GE Zhiwei, JIN Yi, et al. Heat transfer behaviour of thermal energy storage components using composite phase change materials[J]. Energy Storage Science and Technology, 2015(2): 169-175.

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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