Application of phase change heat storage in heat pump heating system based on time-of-use electricity pricing

doi:10.19799/j.cnki.2095-4239.2023.0698

Abstract

Abstract:

China has proposed the goal of carbon peak and carbon neutrality to promote the utilization of renewable energy and electrification of heating. Reducing the costs of electric heating has become an urgent need. This study presents a novel heat pump heating system with phase change heat storage. The system charges during surplus renewable energy generation or off-peak electricity and discharges during intermittent periods of renewable energy or peak electricity, achieving thermoelectric decoupling and peak shaving. Owing to the flexibility in utilizing phase change heat storage devices, control strategies can be dynamically adjusted based on the characteristics of renewable energy generation or peak and off-peak electricity periods. This study analyzes the operational performance of the system primarily driven by off-peak electricity and examines the influences of different thermal storage times and capacities on the economy of the system. Experiments were conducted in the high-altitude region of Qinghai. The system with phase change heat storage reduces costs by 5.28% compared to heat pump direct heating. By adjusting control strategies to change the charging time with a storage capacity of 75 kWh, power consumption and operating costs of the system can be reduced by 5.69% and 13.5%, respectively. Increasing the storage capacity to 150 kWh can adjust the peak and off-peak electricity consumption, with the proportion of off-peak electricity reaching a maximum of 84.52%. This further reduces operating costs by 10.04%. The heating system with phase change heat storage demonstrates good economic benefits. The rational utilization of its thermoelectric decoupling characteristics can contribute to the absorption of renewable energy and the stable operation of the power grid.

Key words: phase change heat storage, heat pump, heating system, economy

CLC Number:

TK 02

Jinxiang YU, Yibo WANG, Jianhong GUO, Xiaoyu ZHANG. Application of phase change heat storage in heat pump heating system based on time-of-use electricity pricing[J]. Energy Storage Science and Technology, 2024, 13(2): 669-676.

Figures/Tables 10

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References 24

1	Spencer Dale. Energy Outlook 2022 edition [R]. BP p.l.c., 2022.32-42.4-69.
2	李政, 陈思源, 董文娟, 等. 碳约束条件下电力行业低碳转型路径研究[J]. 中国电机工程学报, 2021, 41(12): 3987-4001.
	LI Z, CHEN S Y, DONG W J, et al. Low carbon transition pathway of power sector under carbon emission constraints[J]. Proceedings of the CSEE, 2021, 41(12): 3987-4001.
3	辛保安, 单葆国, 李琼慧, 等. "双碳"目标下"能源三要素"再思考[J]. 中国电机工程学报, 2022, 42(9): 3117-3126.
	XIN B A, SHAN B G, LI Q H, et al. Rethinking of the "three elements of energy" toward carbon peak and carbon neutrality[J]. Proceedings of the CSEE, 2022, 42(9): 3117-3126.
4	舒印彪, 陈国平, 贺静波, 等. 构建以新能源为主体的新型电力系统框架研究[J]. 中国工程科学, 2021, 23(6): 61-69.
	SHU Y B, CHEN G P, HE J B, et al. Building a new electric power system based on new energy sources[J]. Strategic Study of CAE, 2021, 23(6): 61-69.
5	孔令国, 史立昊, 石振宇, 等. 基于交替方向乘子法的园区电-氢-热系统低碳优化调度[J]. 电工技术学报, 2023, 38(11): 2932-2944.
	KONG L G, SHI L H, SHI Z Y, et al. Low-carbon optimal dispatch of electric-hydrogen-heat system in park based on alternating direction method of multipliers[J]. Transactions of China Electrotechnical Society, 2023, 38(11): 2932-2944.
6	丁怡婷. 去年风电光伏发电量首次突破1万亿千瓦时——同比增长21%,占全社会用电量的13.8%[N]. 人民日报, 2023-02-14(10).
7	姜云鹏, 任洲洋, 李秋燕, 等. 考虑多灵活性资源协调调度的配电网新能源消纳策略[J]. 电工技术学报, 2022, 37(7): 1820-1835.
	JIANG Y P, REN Z Y, LI Q Y, et al. An accommodation strategy for renewable energy in distribution network considering coordinated dispatching of multi-flexible resources[J]. Transactions of China Electrotechnical Society, 2022, 37(7): 1820-1835.
8	方乐, 刘成奎, 陈晓弢, 等. 含光热复合压缩空气储能的分布式综合能源系统容量规划方法[J]. 电工技术学报, 2022, 37(23): 5933-5943.
	FANG L, LIU C K, CHEN X T, et al. Capacity planning method of distributed integrated energy system with solar thermal composite compressed air energy storage[J]. Transactions of China Electrotechnical Society, 2022, 37(23): 5933-5943.
9	潘超, 范宫博, 王锦鹏, 等. 灵活性资源参与的电热综合能源系统低碳优化[J]. 电工技术学报, 2023, 38(6): 1633-1647.
	PAN C, FAN G B, WANG J P, et al. Low-carbon optimization of electric and heating integrated energy system with flexible resource participation[J]. Transactions of China Electrotechnical Society, 2023, 38(6): 1633-1647.
10	中华人民共和国住房和城乡建设部. 建筑节能与可再生能源利用通用规范: GB 55015—2021[S]. 北京: 中国建筑工业出版社, 2021.
	Ministry of Housing and Urban-Rural Development of the People's Republic of China. General code for energy efficiency and renewable energy application in buildings: GB 55015—2021[S]. Beijing: China Architecture & Building Press, 2021.
11	ERMEL C, BIANCHI M V A, CARDOSO A P, et al. Thermal storage integrated into air-source heat pumps to leverage building electrification: A systematic literature review[J]. Applied Thermal Engineering, 2022, 215: 118975.
12	BAETEN B, ROGIERS F, HELSEN L. Reduction of heat pump induced peak electricity use and required generation capacity through thermal energy storage and demand response[J]. Applied Energy, 2017, 195: 184-195.
13	严景好, 李杰, 李一鸣, 等. 基于梯度孔隙率金属泡沫的复合相变单元储热性能数值模拟[J]. 储能科学与技术, 2023, 12(8): 2424-2434.
	YAN J H, LI J, LI Y M, et al. Numerical simulation study on heat storage performance of composite phase-change units based on gradient-porosity metal foam[J]. Energy Storage Science and Technology, 2023, 12(8): 2424-2434.
14	戴宇成, 王增鹏, 刘凯豹, 等. 基于相变材料的储热器及其传热强化研究进展[J]. 储能科学与技术, 2023, 12(2): 431-458.
	DAI Y C, WANG Z P, LIU K B, et al. Research progress of heat storage and heat transfer enhancement based on phase change materials[J]. Energy Storage Science and Technology, 2023, 12(2): 431-458.
15	INKERI E, TYNJÄLÄ T, NIKKU M. Numerical modeling of latent heat thermal energy storage integrated with heat pump for domestic hot water production[J]. Applied Thermal Engineering, 2022, 214: 118819.
16	LIU W Y, BIE Y, XU T, et al. Heat transfer enhancement of latent heat thermal energy storage in solar heating system: A state-of-the-art review[J]. Journal of Energy Storage, 2022, 46: 103727.
17	JIN X, ZHANG H H, HUANG G S, et al. Experimental investigation on the dynamic thermal performance of the parallel solar-assisted air-source heat pump latent heat thermal energy storage system[J]. Renewable Energy, 2021, 180: 637-657.
18	刘伟, 李振明, 刘铭扬, 等. 高温相变储热材料制备与应用研究进展[J]. 储能科学与技术, 2023, 12(2): 398-430.
	LIU W, LI Z M, LIU M Y, et al. Review of high-temperature phase change heat storage material preparation and applications[J]. Energy Storage Science and Technology, 2023, 12(2): 398-430.
19	张亚磊, 崔海亭, 王晨, 等. 基于低谷电的太阳能-地源热泵相变蓄热供暖系统研究[J]. 储能科学与技术, 2023, 12(12): 3789-3798.
	ZHANG Y L, CUI H T, WANG C, et al. Research on a phase-change storage heating system of a solar-ground source heat pump based on low current[J]. Energy Storage Science and Technology, 2023, 12(12): 3789-3798.
20	LE K X, HUANG M J, SHAH N N, et al. Techno-economic assessment of cascade air-to-water heat pump retrofitted into residential buildings using experimentally validated simulations[J]. Applied Energy, 2019, 250: 633-652.
21	胡康, 徐飞, 陈磊, 等. 利用相变储热提升电力系统可再生能源消纳[J]. 工程热物理学报, 2018, 39(1): 1-7.
	HU K, XU F, CHEN L, et al. Improve the integration of renewable energy sources into power system by the usage of phase-change heat storage[J]. Journal of Engineering Thermophysics, 2018, 39(1): 1-7.
22	WANG Y B, QUAN Z H, JING H R, et al. Performance and operation strategy optimization of a new dual-source building energy supply system with heat pumps and energy storage[J]. Energy Conversion and Management, 2021, 239: 114204.
23	JIN X, ZHENG S Q, HUANG G S, et al. Energy and economic performance of the heat pump integrated with latent heat thermal energy storage for peak demand shifting[J]. Applied Thermal Engineering, 2023, 218: 119337.
24	常健, 宋航, 康宇震, 等. 高温复合相变储热在城市清洁能源改造中的应用[J]. 储能科学与技术, 2023, 12(11): 3471-3478.
	CHANG J, SONG H, KANG Y Z, et al. Application of high-temperature composite phase change heat storage in urban clean energy transformation[J]. Energy Storage Science and Technology, 2023, 12(11): 3471-3478.

方案	放热时长/h	储热时长/h	储热箱数量/个
4	15	9	2
5	10	14	3
6	7.5	16.5	4

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[3]	Yalei ZHANG, Haiting CUI, Chen WANG, Haosong CHEN, Chao WANG. Research on a phase-change storage heating system of a solar-ground source heat pump based on low current [J]. Energy Storage Science and Technology, 2023, 12(12): 3789-3798.
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[5]	Chen WANG, Haiting CUI, Chao WANG, Yalei ZHANG, Haosong CHEN. Examination of the cross-seasonal phase-change heat storage performance of different U-shaped buried pipe structures [J]. Energy Storage Science and Technology, 2023, 12(12): 3808-3817.
[6]	Jingjiao LI, Cuilei YANG, Wei LI. Research on computer software processing technology in thermal energy storage [J]. Energy Storage Science and Technology, 2023, 12(12): 3895-3897.
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[8]	Jiangfeng LI, Shuaiqi LI, Xianzhen RUAN, Lei XU, Xiaochun ZHANG, Wenji SONG, Ziping FENG. Review of CO₂ heat pump and thermal management for pure electric vehicle [J]. Energy Storage Science and Technology, 2022, 11(9): 2959-2970.
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[11]	Xiong LI, Peiqiang LI. Analysis of economics and economic boundaries of large-scale application of power batteries in cascade utilization [J]. Energy Storage Science and Technology, 2022, 11(2): 717-725.
[12]	Yubo QI, Da GAO, Xianling ZHENG. Economic analysis of SPE hydrogen production technology in China [J]. Energy Storage Science and Technology, 2022, 11(12): 4038-4047.
[13]	Jiamin LU, Junhui XU, Weidong WANG, Hao WANG, Zijun XU, Liuping CHEN. Development of large-scale underground hydrogen storage technology [J]. Energy Storage Science and Technology, 2022, 11(11): 3699-3707.
[14]	Lan ZHAO, Guozhen WANG. Research progress on composite heat transfer enhancement technology of phase change heat storage system [J]. Energy Storage Science and Technology, 2022, 11(11): 3534-3547.
[15]	Zijie XU, Yan WANG. Thermal storage properties of porous inorganic composite phase change material [J]. Energy Storage Science and Technology, 2022, 11(10): 3171-3179.