Study on preparation and thermoelectric regulation performance of water-ZnO nanofluids for spectral-beam splitting

doi:10.11949/0438-1157.20231144

Abstract

Abstract:

To reduce the popularization and application cost of the photovoltaic/thermal (PV/T) collector, using nanofluids as the spectral-beam splitter (SBS), low-cost water-ZnO nanofluid is prepared by the two-step method as the SBS, and its preparation parameters are optimized to enhance its stability, including the dispersant type, dispersion ratio, and ultrasonic duration. On this basis, the effects of mass fraction, nanoparticle size, and optical path on the spectral transmittance of water-ZnO nanofluid are first tested experimentally; secondly, the effects of the above parameters on the regulation performance of heat-to-electricity of the SBS-PV/T collector are simulated and analyzed; finally, the sensitivity of the above parameters to four evaluation indexes is evaluated. The results show that adding sodium hexametaphosphate as a dispersant with the dispersion ratio of 1∶5 and ultrasonic treatment for 1.5 hours can maximize the stability of water-based ZnO nanofluid. Secondly, the mass fraction, particle size, and optical path have a linear influence on the thermal and electric performances of the SBS-PV/T collector; concretely, the photothermal efficiency, heat-to-electric ratio, overall efficiency, and merit function of the SBS-PV/T collector increase with the mass fraction, particle size, and optical path; while the photovoltaic efficiency is the opposite. Of which, the heat-to-electric ratio is most sensitive to the change of nanofluid parameters, with an average sensitivity coefficient of 0.45; on the other hand, the performance of the SBS-PV/T collector is most sensitive to the optical path, and its sensitivity coefficients to photothermal efficiency, photovoltaic efficiency, heat-to-electric ratio, and merit function of the collector are 0.53, -0.27, 0.76, and 0.09, respectively.

Key words: solar energy, photovoltaic/thermal, nanofluid, stability, preparation, spectral-beam splitting, performance simulation

摘要：

制备低成本水基ZnO纳米流体作为分频介质以降低分频式光伏光热（SBS-PV/T）集热器的推广应用成本；优化了其高稳定性制备工艺，实验测试了质量分数、粒径及光程对其光谱透过率的影响，并模拟分析了上述变量对集热器热电性能的调控特性，评估了不同变量对不同评价指标的敏感性。结果表明，六偏磷酸钠作为分散剂，分散比为1∶5，超声处理1.5 h可最大程度增强水基ZnO纳米流体的稳定性；集热器热效率、热电比、综合效率及优值因子均随ZnO纳米颗粒粒径、质量分数及光程的增大而增大，电效率则相反。SBS-PV/T集热器的热电比最易受纳米流体参数变化的影响，平均敏感性系数为0.45；集热器综合性能对纳米流体光程变化最敏感，其对热电效率、热电比及优值因子的敏感性系数分别为0.53、-0.27、0.76及0.09。

关键词: 太阳能, 光伏/光热, 纳米流体, 稳定性, 制备, 光谱分频, 性能模拟

CLC Number:

TK 519

Mengqi PENG, Tao ZHANG, Maosheng LI, Zhengrong SHI, Jingyong CAI. Study on preparation and thermoelectric regulation performance of water-ZnO nanofluids for spectral-beam splitting[J]. CIESC Journal, 2023, 74(12): 5027-5037.

彭梦琦, 张涛, 李茂胜, 施正荣, 蔡靖雍. 光谱分频水基ZnO纳米流体制备及其热电性能调控[J]. 化工学报, 2023, 74(12): 5027-5037.

Figures/Tables 13

Fig.1 Two-step preparation process of nanofluid

Table 1 Information of instruments and chemical reagents

试剂/仪器	厂家	型号/规格
ZnO	阿拉丁	50 nm
分散剂	阿拉丁	—
去离子水	—	—
磁力搅拌器	群安仪器	HS5S
超声处理仪	力辰科技	LC-JY92-IIDN
分光光度计	岛津	3700i DUV

Fig.2 Schematic diagram of SBS-PV/T collector

Fig.3 Experimental result of sedimentation of water-ZnO nanofluid with ultrasonic treatment for 30 min and without dispersant

Table 2 Experimental results of sedimentation of water-ZnO nanofluids with different dispersants and glycol-ZnO nanofluid without dispersant

时间	实验结果	备注
24 h		均未出现沉淀
48 h		SDS出现沉淀
72 h		CTAB出现沉淀
96 h		乙二醇,SDBS出现沉淀
144 h		GA出现沉淀
360 h		仅SHMP未出现沉淀

Fig.4 Price comparison of different dispersants

Fig.5 Variations of instability and spectral characteristics of water-ZnO nanofluids with different dispersion ratios within 15 days

Fig.6 Variations of instability and spectral characteristics of water-ZnO nanofluids with different ultrasonic duration within 15 days

Fig.7 Average optical properties and SBS-PV/T collector performance under different mass fractions within 15 days

Fig.8 TEM images of water-ZnO nanofluids under different particle sizes

Fig.9 Average optical properties and SBS-PV/T collector performance under different nanoparticle sizes within 15 days

Fig.10 Optical characteristics and SBS-PV/T collector performance under different optical paths

Fig.11 Sensitivity analysis of the performance of SBS-PV/T collector

References 33

1	樊苗苗, 夏小康, 顾涛, 等. 太阳能光伏光热/催化净化复合技术的研究进展[J]. 太阳能学报, 2023, 44(7): 96-106.
	Fan M M, Xia X K, Gu T, et al. Research progress on solar photovoltaic/thermal-catalytic/purification comperhensive technology[J]. Acta Energiae Solaris Sinica, 2023, 44(7): 96-106.
2	孙亮亮, 袁艳平, 胡文举, 等. 热水型PV/T组件结构参数的敏感性分析[J]. 化工学报, 2014, 65(S2): 235-239.
	Sun L L, Yuan Y P, Hu W J, et al. Sensitivity analysis of configuration parameters of water-type PV/T module[J]. CIESC Journal, 2014, 65(S2): 235-239.
3	Du M, Tang G H, Wang T M. Exergy analysis of a hybrid PV/T system based on plasmonic nanofluids and silica aerogel glazing[J]. Solar Energy, 2019, 183: 501-511.
4	Hassani S, Saidur R, Mekhilef S, et al. Environmental and exergy benefit of nanofluid-based hybrid PV/T systems[J]. Energy Conversion and Management, 2016, 123: 431-444.
5	Said Z, Arora S, Farooq S, et al. Recent advances on improved optical, thermal, and radiative characteristics of plasmonic nanofluids: academic insights and perspectives[J]. Solar Energy Materials and Solar Cells, 2022, 236: 111504.
6	Kameya Y, Hanamura K. Enhancement of solar radiation absorption using nanoparticle suspension[J]. Solar Energy, 2011, 85(2): 299-307.
7	Hjerrild N E, Mesgari S, Crisostomo F, et al. Hybrid PV/T enhancement using selectively absorbing Ag-SiO₂/carbon nanofluids[J]. Solar Energy Materials and Solar Cells, 2016, 147: 281-287.
8	An W, Wu J R, Zhu T, et al. Experimental investigation of a concentrating PV/T collector with Cu₉S₅ nanofluid spectral splitting filter[J]. Applied Energy, 2016, 184: 197-206.
9	Zhang C X, Shen C, Wei S, et al. Flexible management of heat/electricity of novel PV/T systems with spectrum regulation by Ag nanofluids[J]. Energy, 2021, 221: 119903.
10	Ni J, Li J, An W, et al. Performance analysis of nanofluid-based spectral splitting PV/T system in combined heating and power application[J]. Applied Thermal Engineering, 2018, 129: 1160-1170.
11	Sharma R, Chauhan P, Sharma A K, et al. Characterization of ZnO/nanofluid for improving heat transfer in thermal systems[J]. Materials Today: Proceedings, 2022, 62: 1904-1908.
12	Sohani A, Shahverdian M H, Sayyaadi H, et al. Selecting the best nanofluid type for a photovoltaic thermal (PV/T) system based on reliability, efficiency, energy, economic, and environmental criteria[J]. Journal of the Taiwan Institute of Chemical Engineers, 2021, 124: 351-358.
13	Xu Y, Li X Y. A study of the structure optimization of silicon-based solar cells[J]. Applied Mechanics and Materials, 2015, 713/714/715: 1234-1238.
14	Jiao Y, Xing M B, Estellé P. Efficient utilization of hybrid photovoltaic/thermal solar systems by nanofluid-based spectral beam splitting: a review[J]. Solar Energy Materials and Solar Cells, 2024, 265: 112648.
15	Liang H X, Wang F Q, Yang L W, et al. Progress in full spectrum solar energy utilization by spectral beam splitting hybrid PV/T system[J]. Renewable and Sustainable Energy Reviews, 2021, 141: 110785.
16	Liang H X, Wang F Q, Zhang D, et al. Experimental investigation of cost-effective ZnO nanofluid based spectral splitting CPV/T system[J]. Energy, 2020, 194: 116913.
17	Meraje W C, Huang C C, Barman J, et al. Design and experimental study of a Fresnel lens-based concentrated photovoltaic thermal system integrated with nanofluid spectral splitter[J]. Energy Conversion and Management, 2022, 258: 115455.
18	Zhu Q Z, Cui Y, Mu L J, et al. Characterization of thermal radiative properties of nanofluids for selective absorption of solar radiation[J]. International Journal of Thermophysics, 2013, 34: 2307-2321.
19	韩晓飞. 基于太阳光谱分频利用的纳米流体特性及实验研究[D]. 呼和浩特: 内蒙古工业大学, 2020.
	Han X F. The characteristics and experimental study of the nanofluid based on solar spectrum beam splitting utilization[D]. Hohhot: Inner Mongolia University of Technology, 2020.
20	刘昌会, 刘红莉, 张天键, 等. 基于尿素/氯化胆碱低共熔溶剂体系纳米流体制备及其热物性研究[J]. 化工学报, 2021, 72(3): 1333-1341.
	Liu C H, Liu H L, Zhang T J, et al. Preparation and thermal physical properties of nanofluids based on a urea/choline chloride deep eutectic solvent system[J]. CIESC Journal, 2021, 72(3): 1333-1341.
21	郭文杰, 翟玉玲, 陈文哲, 等. Al₂O₃-CuO/水混合纳米流体对流传热性能及热经济性分析[J]. 化工进展, 2023, 42(5): 2315-2324.
	Guo W J, Zhai Y L, Chen W Z, et al. Analysis of convective heat transfer and thermo-economic performance of Al₂O₃-CuO/water hybrid nanofluids[J]. Chemical Industry and Engineering Progress, 2023, 42(5): 2315-2324.
22	Alktranee M, Shehab M A, Németh Z, et al. Experimental study for improving photovoltaic thermal system performance using hybrid titanium oxide-copper oxide nanofluid[J]. Arabian Journal of Chemistry, 2023, 16(9): 105102.
23	雷刚, 范襄, 王凯, 等. 太阳电池在不同光谱下电性能的分析与换算方法[J]. 太阳能学报, 2021, 42(7): 179-184.
	Lei G, Fan X, Wang K, et al. Analysis and conversion method for electrical performance of solar cells at different solar spectra[J]. Acta Energiae Solaris Sinica, 2021, 42(7): 179-184.
24	王婷婷, 戴妙妙, 卞志华, 等. 光谱响应测试在太阳能电池中的应用[J]. 日用电器, 2014(9): 73-75.
	Wang T T, Dai M M, Bian Z H, et al. The application of spectral response test in solar cells[J]. Electrical Appliances, 2014(9): 73-75.
25	Otanicar T, Chowdhury I, Phelan P E, et al. Parametric analysis of a coupled photovoltaic/thermal concentrating solar collector for electricity generation[J]. Journal of Applied Physics, 2010, 108(11): 114907.
26	Libra M, Petrík T, Poulek V, et al. Changes in the efficiency of photovoltaic energy conversion in temperature range with extreme limits[J]. IEEE Journal of Photovoltaics, 2021, 11(6): 1479-1484.
27	赵晓波. Ag和Ag@SiO₂纳米流体的太阳能分频特性优化及其在PV/T系统中的性能研究[D]. 镇江: 江苏大学, 2022.
	Zhao X B. Study on solar spectral splitting characteristics optimization of Ag and Ag@SiO₂ nanofluid and its Performance in PV/T system [D]. Zhenjiang: Jiangsu University, 2022.
28	陈晓彬, 韩新月, 孙耀, 等. 分频型光伏光热系统中丙二醇基Ag/CoSO₄纳米流体的性能研究[J]. 太阳能学报, 2021, 42(5): 168-173.
	Chen X B, Han X Y, Sun Y, et al. Study on propylene glycol based Ag/CoSO₄ nanofluid splitter for spectrum-splitting PV/T system[J]. Acta Energiae Solaris Sinica, 2021, 42(5): 168-173.
29	Han X Y, Zhao X B, Huang J, et al. Optical properties optimization of plasmonic nanofluid to enhance the performance of spectral splitting photovoltaic/thermal systems[J]. Renewable Energy, 2022, 188: 573-587.
30	刘艳峰, 李荟婷, 王登甲, 等. 太阳能集热系统过热影响因素分析[J]. 太阳能学报, 2021, 42(3): 463-468.
	Liu Y F, Li H T, Wang D J, et al. Factor analysis of overheating in solar collector system[J]. Acta Energiae Solaris Sinica, 2021, 42(3): 463-468.
31	Kong L H, Sun J L, Bao Y Y. Preparation, characterization and tribological mechanism of nanofluids[J]. RSC Advances, 2017, 7(21): 12599-12609.
32	刘冉, 夏国栋, 杜墨. 三角形微通道内纳米流体流动与换热特性[J]. 化工学报, 2016, 67(12): 4936-4943.
	Liu R, Xia G D, Du M. Characteristics of convective heat transfer in triangular microchannel heat sink using different nanofluids[J]. CIESC Journal, 2016, 67(12): 4936-4943.
33	郑新建, 马建中, 鲍艳. 纳米TiO₂在水中的分散与改性研究[J]. 涂料工业, 2010, 40(10): 15-18, 23.
	Zheng X J, Ma J Z, Bao Y. Research on the dispersion and modification of nano TiO₂ in aqueous solution[J]. Paint & Coatings Industry, 2010, 40(10): 15-18, 23.

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