Design of thermal and energy storage performance test platform for solid electrothermal energy storage device

doi:10.19799/j.cnki.2095-4239.2022.0590

Abstract

Abstract:

A platform is designed based on the thermal performance testing methods and testing processes of solid electric heat storage devices proposed in Thermal Storage Electric Heating Devices (GB/T39288—2020). By referring to domestic and foreign standards, the platform can test full working conditions (including the pure heat storage condition, pure heat release condition, and storage and release conditions), with improved the thermal and energy storage performance testing for solid electric heat storage devices. The platform can carry out the standard thermal and energy storage performance test for the solid electric heat storage device by improving the test procedures of GB/T 39288—2020 combined with the heat release testing under both non-heating and heating states. To verify the reliability of the platform, one standard test is conducted on a solid electric heat storage device. The platform records the parameters such as electricity, time, and temperature during the test; draws the temperature curve, heating wire current-voltage curve, and heat output load curve during the test; and calculates the thermal and energy storage performances of the solid electric heat storage through improved and supplemented formulas. Based on the calculation results, the energy storage performance diagram is drawn under the rated thermal output power. The diagram clearly shows the effective release temperature range, energy storage capacity, and energy utilization of the solid electric heat energy storage device. The result of the test is found close to the theoretical value and empirical value, which proves that the platform can be used for self-inspection or teaching by equipment manufacturers. The platform also has the function of displaying user-defined heat load curves. This function can help teachers and learners research and learn solid electric heat energy storage devices under real working conditions.

Key words: energy storage, experimental platform, solid electric heat storage device, performance testing

CLC Number:

TK 3

Chao ZHANG, Zuoxia XING, Qitong FU, Libing JIANG, Lei CHEN. Design of thermal and energy storage performance test platform for solid electrothermal energy storage device[J]. Energy Storage Science and Technology, 2023, 12(2): 585-592.

Figures/Tables 8

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Table 1

Parameters of solid electric heat energy storage device"

参数	值/类
额定加热功率/kW	1000
储热体储能密度/(kWh/m³)	450
储热体额定温度/℃	800
储热体标称下限温度/℃	270～300
额定热输出功率/kW	600
输出热能工质	热水
固体电热储能装置体长宽高/mm	6000 $×$ 3000 $×$ 3000

Table 1

Fig. 5

Fig. 6

Table 2

Part of measurement records and post-processing results"

项目	参数		值
记录项目	时段/min	$T 1$	395
		$T 2$	467
		$T 3$	467
		$T 4$	280
		$T 5$	466
		$T 6$	279
		$T 7$	466
		$T 8$	698
		$T 9$	465
		$T 10$	701
	电量/kWh	$E 1$	6483.59
		$E 2$	443.25
		$E 3$	621.08
		$E 4$	4597.11
		$E 5$	619.71
		$E 6$	4581.51
		$E 7$	619.46
		$E 8$	13102.24
		$E 8$	618.31
		$E 9$	618.31
		$E 10$	13163.52
测量项目	平均室温/℃		20.9
	平均出水温度/℃		46.2
	平均回水温度/℃		45.3
	平均质量流量/(kg/s)		17.9
计算项目	最大有效放热量/kWh		4498.14
	最大静置热损失率		5.78%
	辅机最大总平均功率/kW		79.78
	动态实际加热功率/kW		405.61
	静态加热时长/h		4.66
	最大有效储热量/kWh		4589.31
	最大额定放热时长/h		7.77
	储能密度/(kWh/m³)		457.59
	静态平均加热电功率/kW		985.18
	系统热效率		86.35%
	实际最大放热功率/kW		579.57
	动态加热时长/h		11.66
	最大储热量/kWh		6483.59
	储能有效利用率		70.78%
	纯谷电最大平均输出热负荷/kW		281.13
	装置热效率		98.01%

Table 2

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