Energy-saving analysis of a heat-pipe natural cooling module for container energy-storage power stations

doi:10.19799/j.cnki.2095-4239.2024.0816

Abstract

Abstract:

With rapid development in wind power, photovoltaic, and other clean energy industries, demand for container energy-storage power stations is growing. Conventional thermal management systems for container energy storage power stations typically rely on air conditioning units for cooling, resulting in significant annual energy consumption. We propose a heat-pipe natural cooling module assisted by evaporative and sky-radiation cooling. Furthermore, we describe the module structure and working principle. We calculate the applicable time, annual cooling capacity, and energy efficiency ratio of the module based on the annual meteorological parameters of typical cities and analyze the energy-saving benefits of the module. The results indicate that evaporative and sky-radiation cooling can effectively extend the applicable time of the heat-pipe natural cooling module. If the module is applied to Beijing, Xi'an, and Shanghai, the applicable time of the module can be increased by 22.95%, 28.56%, and 13.06%, respectively, on applying evaporative and sky-radiation cooling. The applicable times of the heat-pipe natural cooling module in typical cities were given and can be used to analyze the applicability the cooling technology in different regions of China. Both evaporative and sky-radiation cooling can enhance the cooling capacity of the module, and the improvement by the former is more obvious. When the heat-pipe natural cooling module assisted by evaporative and sky-radiation cooling was applied in Beijing, Xi'an, and Shanghai, the average coefficient of performance was 24.2, 22.3, and 19.7 respectively, which are much higher than the annual energy efficiency ratio of a unit air conditioner with first-level energy efficiency.

Key words: container energy storage power station, heat pipe natural cooling module, evaporative cooling, sky radiation

CLC Number:

TU 831.6

Caiwei YU, Jinbei HONG, Yiming QI, Yunfeng LIU, Xiufeng YANG. Energy-saving analysis of a heat-pipe natural cooling module for container energy-storage power stations[J]. Energy Storage Science and Technology, 2025, 14(2): 846-853.

Figures/Tables 10

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城市	热管自然冷却的适用时长/h	辅以蒸发冷却的适用时长/h	再辅以天空辐射的适用时长/h	城市	热管自然冷却的适用时长/h	辅以蒸发冷却的适用时长/h	再辅以天空辐射的适用时长/h
北京	5219	6317	6501	昆明	4611	6171	6533
拉萨	7444	8757	8758	济南	4558	5574	5806
西宁	7409	8760	8760	南京	4536	5213	5402
呼和浩特	6425	8068	8235	长沙	4349	4883	5141
哈尔滨	6329	7107	7287	合肥	4283	4869	5046
长春	6248	7110	7276	成都	4224	4698	4919
兰州	6019	7929	8179	上海	4218	4726	4846
乌鲁木齐	5975	8144	8342	武汉	4132	4699	4966
银川	5872	7358	7611	杭州	4083	4498	4599
沈阳	5813	6594	6763	重庆	3997	4434	4599
太原	5682	7026	7295	南昌	3949	4487	4729
天津	5019	5795	5924	福州	2992	3769	4086
石家庄	4899	5950	6159	南宁	2048	2580	2851
西安	4884	5574	5579	广州	2047	2889	3139
郑州	4757	5685	5950	香港	1431	2096	2320
贵阳	4642	5567	5906	海口	628	1128	1416

项目	北京	西安	上海
蒸发冷却辅助供冷的热管自然冷却模块	COP均值23.5	COP均值21.3	COP均值18.6
蒸发冷却+天空辐射辅助供冷的热管自然冷却模块	COP均值24.2	COP均值22.3	COP均值19.7
机房专用单元式空调机	AEER=4.0(1级能效)