Research on the performance of thermal storage reactor with salt hydrates under multifactor interactions

doi:10.19799/j.cnki.2095-4239.2024.1066

Abstract

Abstract:

Thermochemical energy storage using hydrated salts offers high energy density and minimal thermal losses over extended storage periods, making it a viable solution for balancing supply and demand in solar energy applications for buildings. The performance of thermal storage reactors using salt hydrates is heavily influenced by their operational conditions and structural design. However, most studies have analyzed single factors, providing limited understanding of reactor performance under multifactor interactions. To address this gap, we developed and experimentally validated a dynamic simulation model for a thermal storage reactor with salt hydrates. The model demonstrated high accuracy, achieving mean absolute errors and maximum absolute errors of 1.55 ℃ and 1.57 ℃, and 7.68 ℃ and 3.35 ℃, for desorption and adsorption outlet temperatures, respectively. Using this model, we conducted systematic analyses of how inlet temperature, inlet relative humidity, mass flow rate, and reactor volume influence reactor performance. In addition, multiple linear regression was applied to evaluate the impacts of multifactor interactions on reactor performance. The results indicated that inlet temperature is the primary factor influencing both the maximum temperature rise during desorption and the reaction time, with influence coefficients of 0.497 and -3.04, respectively. For adsorption reactions, inlet relative humidity had the most significant impact, with higher humidity boosting the maximum temperature rise and shortening reaction time. Furthermore, the combined influence of temperature and humidity exerted the greatest impact on reactions than their individual effects, particularly on reaction time. Finally, the combined effects of temperature, humidity, and reactor volume demonstrated a pronounced impact on the adsorption reaction time, with an influence coefficient of 0.0959, which was 7—240 times greater than that of various other combinations.

Key words: thermochemical heat storage, numerical simulation, influencing factors, multiple linear regression

CLC Number:

TK 02

Lexiao WANG, Yimo LUO, Liming WANG, Gesang YANG. Research on the performance of thermal storage reactor with salt hydrates under multifactor interactions[J]. Energy Storage Science and Technology, 2024, 13(12): 4396-4405.

Figures/Tables 15

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Table 1

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Table 2

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Table 3

Multiple regression analysis results of influencing factors"

反应	影响因素	最大温升			反应时间
反应	影响因素	R²	P	$β$	R²	P	$β$
脱附	T_进口	0.840	0.000	0.497	0.581	0.000	-3.043
	RH_进口	0.156	0.017	-1.499	0.042	0.233	5.700
	m	0.002	0.802	-0.001	0.168	0.013	-0.057
	V	0.001	0.889	0.913	0.134	0.028	102.333

吸附	T_进口	0.201	0.006	-0.449	0.138	0.026	4.378
	RH_进口	0.748	0.000	0.260	0.615	0.000	-2.777
	m	0.015	0.476	-0.002	0.118	0.040	-0.061
	V	0.030	0.314	5.189	0.049	0.193	78.667

Table 3

Table 4

References 16

1	中国建筑节能协会, 重庆大学城乡建设与发展研究院. 中国建筑能耗与碳排放研究报告(2023年)[J]. 建筑, 2024(2): 46-59.
	China Association of Building Energy Efficiency, Institute of Urban-rural Construction and Development, Chongqing University. Research report on building energy consumption and carbon emissions in China (2023)[J]. Construction and Architecture, 2024(2): 46-59.
2	ALI BAGHERIAN M, MEHRANZAMIR K. A comprehensive review on renewable energy integration for combined heat and power production[J]. Energy Conversion and Management, 2020, 224: 113454. DOI: 10.1016/j.enconman.2020.113454.
3	PATHAK S K, TYAGI V V, CHOPRA K, et al. Energy, exergy, economic and environmental analyses of solar air heating systems with and without thermal energy storage for sustainable development: A systematic review[J]. Journal of Energy Storage, 2023, 59: 106521. DOI: 10.1016/j.est.2022.106521.
4	陈海生, 李泓, 徐玉杰, 等. 2023年中国储能技术研究进展[J]. 储能科学与技术, 2024, 13(5): 1359-1397. DOI: 10.19799/j.cnki.2095-4239.2024.0441.
	CHEN H S, LI H, XU Y J, et al. Research progress on energy storage technologies of China in 2023[J]. Energy Storage Science and Technology, 2024, 13(5): 1359-1397. DOI: 10.19799/j.cnki.2095-4239.2024.0441.
5	ANG T Z, SALEM M, KAMAROL M, et al. A comprehensive study of renewable energy sources: Classifications, challenges and suggestions[J]. Energy Strategy Reviews, 2022, 43: 100939. DOI: 10.1016/j.esr.2022.100939.
6	NAZIR H, BATOOL M, BOLIVAR OSORIO F J, et al. Recent developments in phase change materials for energy storage applications: A review[J]. International Journal of Heat and Mass Transfer, 2019, 129: 491-523. DOI: 10.1016/j.ijheatmasstransfer. 2018.09.126.
7	CHEN Z B, ZHANG X L, JI J, et al. A review of the application of hydrated salt phase change materials in building temperature control[J]. Journal of Energy Storage, 2022, 56: 106157. DOI: 10.1016/j.est.2022.106157.
8	葛志伟, 叶锋, Mathieu Lasfargues, 等. 中高温储热材料的研究现状与展望[J]. 储能科学与技术, 2012, 1(2): 89-102.
	GE Z W, YE F, LASFARGUES M, et al. Recent progress and prospective of medium and high temperatures thermal energy storage materials[J]. Energy Storage Science and Technology, 2012, 1(2): 89-102.
9	CHEN X Y, ZHANG Z, QI C G, et al. State of the art on the high-temperature thermochemical energy storage systems[J]. Energy Conversion and Management, 2018, 177: 792-815. DOI: 10.1016/j.enconman.2018.10.011.
10	GAEINI M, ZONDAG H A, RINDT C C M. Effect of kinetics on the thermal performance of a sorption heat storage reactor[J]. Applied Thermal Engineering, 2016, 102: 520-531. DOI: 10.1016/j. applthermaleng. 2016.03.055.
11	FARCOT L, LE PIERRÈS N, MICHEL B, et al. Numerical investigations of a continuous thermochemical heat storage reactor[J]. Journal of Energy Storage, 2018, 20: 109-119. DOI: 10.1016/j.est.2018.08.020.
12	MUKHERJEE A, MAJUMDAR R, SAHA S K, et al. Assessment of open thermochemical energy storage system performance for low temperature heating applications[J]. Applied Thermal Engineering, 2019, 156: 453-470. DOI: 10.1016/j. applthermaleng.2019.04.096.
13	RUI J J, LUO Y M, WANG M Q, et al. Design and performance evaluation of an innovative salt hydrates-based reactor for thermochemical energy storage[J]. Journal of Energy Storage, 2022, 55: 105799. DOI: 10.1016/j.est.2022.105799.
14	葛继翔, 纪明希, 丁玉龙, 等. 水合盐热化学反应器参数优化与供暖应用案例分析[J]. 储能科学与技术, 2023, 12(12): 3799-3807. DOI: 10.19799/j.cnki.2095-4239.2023.0686.
	GE J X, JI M X, DING Y L, et al. Parameter optimization of a thermochemical reactor using salt hydrates: A case study of heating application[J]. Energy Storage Science and Technology, 2023, 12(12): 3799-3807. DOI: 10.19799/j.cnki.2095-4239. 2023.0686.
15	FUMO N, RAFE BISWAS M A. Regression analysis for prediction of residential energy consumption[J]. Renewable and Sustainable Energy Reviews, 2015, 47: 332-343. DOI: 10.1016/j. rser. 2015. 03.035.
16	武明虎, 岳程鹏, 张凡, 等. 多尺度分解下GRU-MLR组合的锂电池剩余使用寿命预测方法[J]. 储能科学与技术, 2023, 12(7): 2220-2228. DOI: 10.19799/j.cnki.2095-4239.2023.0298.
	WU M H, YUE C P, ZHANG F, et al. Combined GRU-MLR method for predicting the remaining useful life of lithium batteries via multiscale decomposition[J]. Energy Storage Science and Technology, 2023, 12(7): 2220-2228. DOI: 10.19799/j.cnki.2095-4239.2023.0298.

参数名称	设定值
脱附进口温度/℃	75
脱附进口相对湿度/%	8
吸附进口温度/℃	20
吸附进口相对湿度/%	52
反应器体积/m³	0.002278
流速/(m³/h)	13.5

影响因素	变化率
影响因素	-40%	-30%	-20%	-10%	0(标况)	+10%	+20%	+30%	+40%
脱附进口相对湿度/%	3	3.5	4	4.5	5	5.5	6	6.5	7
吸附进口温度/℃	9	10.5	12	13.5	15	16.5	18	19.5	21
吸附进口相对湿度/%	30	35	40	45	50	55	60	65	70
质量流量/(kg/h)	600	700	800	900	1000	1100	1200	1300	1400
反应器体积/m³	0.3	0.35	0.4	0.45	0.5	0.55	0.6	0.65	0.7
脱附进口温度/℃	56 (-20%)	59.5 (-15%)	63 (-10%)	66.5 (-5%)	70	73.5 (+5%)	77 (+10%)	80.5 (+15%)	84 (+20%)

评价指标	脱附		吸附
评价指标	最大温升	反应时间	最大温升	反应时间
R²	0.998	0.925	0.993	0.920
α₁	0.0077	-0.0587	-0.0003	0.0038
α₂	-0.0005	0.0042	0.0011	-0.0182
α₃	0.0001	0.0004	0.0000	0.0001
α₄	-0.0006	-0.0089	0.0000	-0.0010
α₅	0.0384	0.2933	0.0164	0.1917
α₆	0.0038	0.0293	0.0002	0.0019
α₇	0.0003	0.0003	0.0000	0.0137
α₈	0.0003	0.0021	0.0005	0.0064
α₉	-0.0028	0.0445	0.0003	0.0008
α₁₀	-0.0003	0.0045	0.0000	0.0005
α₁₁	0.0192	0.1466	0.0082	0.0959
α₁₂	0.0000	-0.0010	0.0000	-0.0004
α₁₃	0.0001	0.0002	0.0000	0.0070
α₁₄	-0.0014	0.0222	0.0002	0.0004
α₁₅	0.0000	-0.0002	0.0000	0.0002

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