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学者姓名：鹿院卫
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摘要 ：
Aluminum ammonium sulfate dodecahydrate (AASD) is a promising hydrated salt-type phase change material. However, its application is severely hindered by its large undercooling and low thermal conductivity. Herein, Al2O3 nanoparticles and xanthan gum are utilized as additives to prepare the modified AASD and improve its supercooling. The modified AASD is adsorbed into the porous modified expanded graphite to prepare a shape-stable composite phase change material (CPCM). Differential scanning calorimeter, thermal constant analyzer, X-ray diffractometer, and scanning electron microscopy are used to characterize the CPCM. Results show that the supercooling of CPCM decreases from 48 to 10 degrees C, and the latent heat and thermal conductivity of CPCM are 235.40 kJ/kg and 4.086 W/(m center dot K), respectively. Compared with pure AASD, the CPCM loses around 10.7 % latent heat, while the thermal conductivity is boosted for more than eight times. After 300 melting-solidification cycles, the latent heat of CPCM only decreases by 5.9 %. Besides, the 600-h corrosion test demonstrates that the 316 L stainless steel is suitable for manufacturing containers for the CPCM. In sum, the developed CPCM owns low supercooling, high thermal conductivity, high cycle stability, and good material compatibility, and hence has a great potential in the field of building and domestic heating.
关键词 ：
Phase change material Phase change material Supercooling Supercooling Expanded graphite Expanded graphite Nanoparticles Nanoparticles Thermal energy storage Thermal energy storage Aluminum ammonium sulfate dodecahydrate Aluminum ammonium sulfate dodecahydrate
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| GB/T 7714 | Fan, Zhansheng , Lu, Yuanwei , Zhao, Tian et al. Preparation and characterization of an aluminum ammonium sulfate dodecahydrate-based composite phase change material with low supercooling and high thermal conductivity [J]. | CASE STUDIES IN THERMAL ENGINEERING , 2024 , 54 . |
| MLA | Fan, Zhansheng et al. "Preparation and characterization of an aluminum ammonium sulfate dodecahydrate-based composite phase change material with low supercooling and high thermal conductivity" . | CASE STUDIES IN THERMAL ENGINEERING 54 (2024) . |
| APA | Fan, Zhansheng , Lu, Yuanwei , Zhao, Tian , Gao, Qi , Li, Zhengyang , Wu, Yuting . Preparation and characterization of an aluminum ammonium sulfate dodecahydrate-based composite phase change material with low supercooling and high thermal conductivity . | CASE STUDIES IN THERMAL ENGINEERING , 2024 , 54 . |
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摘要 ：
Molten salt has been extensively applied as a medium for heat transfer and thermal energy storage. In this work, a novel quinary nitrate/nitrite mixed molten salt is developed and its comprehensive thermophysical properties, thermal stability, sensible thermal energy storage density and economics are evaluated. Based on the thermal analysis method, the melting point and decomposition temperature of the NaNO3-KNO3-Ca (NO3)2-NaNO2-KNO2 system are determined at 102.3 degrees C and 651.2 degrees C, respectively. Furthermore, the specific heat capacity, density and thermal conductivity of the quinary molten salt are measured using specific apparatus with satisfactory results. It is noteworthy that after long-term high temperature test and multiple heating-cooling cycle tests, the change rate of the various thermophysical properties of the quinary molten salt is all less than 10%, exhibiting excellent thermal stability. The sensible thermal energy storage density of the quinary molten salt is 743.7 kJ/kg, and the sensible thermal energy storage cost is 17.2 RMB/(kW & sdot;h). Eventually, the proposed molten salt has the advantages of the wide liquid operating temperature range, high sensible thermal energy storage density and better thermal performance, which can be widely used as an excellent heat transfer and storage material for thermal energy storage systems.
关键词 ：
Thermal stability Thermal stability Molten salt Molten salt Thermal energy storage Thermal energy storage Thermophysical property Thermophysical property Concentrated solar power Concentrated solar power
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| GB/T 7714 | Wang, Yuanyuan , Lu, Yuanwei , Wang, Yanquan et al. Investigation on thermal performance of quinary nitrate/nitrite mixed molten salts with low melting point for thermal energy storage [J]. | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2024 , 270 . |
| MLA | Wang, Yuanyuan et al. "Investigation on thermal performance of quinary nitrate/nitrite mixed molten salts with low melting point for thermal energy storage" . | SOLAR ENERGY MATERIALS AND SOLAR CELLS 270 (2024) . |
| APA | Wang, Yuanyuan , Lu, Yuanwei , Wang, Yanquan , Wu, Yuting , Gao, Qi , Zhang, Cancan . Investigation on thermal performance of quinary nitrate/nitrite mixed molten salts with low melting point for thermal energy storage . | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2024 , 270 . |
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摘要 ：
Molten salt nanofluids has been extensively considered for Thermal Energy Storage (TES) applications due to its enhanced heat storage and heat transfer properties. The compatibility between molten salt nanofluids and metal materials becomes a key issue affecting their application in TES systems. In this paper, corrosion tests were carried out on 316 L stainless steel in quaternary nitrate molten salt at 565 C-degrees using electrochemical methods including impedance spectroscopy and potentiodynamic polarization to determine the effect of the addition of nanoparticles to the molten salt corrosion process. The results showed that the addition of nanoparticles reduced the corrosion current density of 316 L stainless steel in quaternary mixed molten salt. The corrosion current density of 316 L stainless steel in molten salt nanofluids with SiO(2 )and TiO2 was reduced to 0.636 mA/cm(2) and 0.749 mA/cm(2), respectively. And the EIS results showed that the impedance value of 316 L stainless steel in molten salt nanofluids was significantly larger than that in base salt. The addition of nanoparticles to the molten salt slowed down the ionic transport of 316 L stainless steel in the molten salt and the formation of reticulated and acicular nanostructures enhanced the corrosion resistance of the stainless steel oxide layer. Therefore, the presence of nanoparticles reduces the corrosion of molten salt on stainless steel.
关键词 ：
Nanofluids Nanofluids Electrochemical method Electrochemical method Stainless steel Stainless steel Quaternary nitrate salt Quaternary nitrate salt
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| GB/T 7714 | Gao, Qi , Lu, Yuanwei , Wang, Yuanyuan et al. Electrochemical study on the corrosion behavior of 316L stainless steel in quaternary nitrate molten salt nanofluids for thermal energy storage applications [J]. | JOURNAL OF ENERGY STORAGE , 2024 , 83 . |
| MLA | Gao, Qi et al. "Electrochemical study on the corrosion behavior of 316L stainless steel in quaternary nitrate molten salt nanofluids for thermal energy storage applications" . | JOURNAL OF ENERGY STORAGE 83 (2024) . |
| APA | Gao, Qi , Lu, Yuanwei , Wang, Yuanyuan , Wu, Yuting , Zhang, Cancan , Wang, Yanquan . Electrochemical study on the corrosion behavior of 316L stainless steel in quaternary nitrate molten salt nanofluids for thermal energy storage applications . | JOURNAL OF ENERGY STORAGE , 2024 , 83 . |
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摘要 ：
The flexible mode of operation of coal-fired units can accommodate large-scale renewable power integration into the grid, providing more grid capacity. The flexibility transformation of coal-fired units in thermal power plants can be achieved through main steam extraction and reheated steam extraction. A 300 MW subcritical unit, 600 MW subcritical unit and 660 MW ultra-supercritical unit with six flexible operation modes were chosen as the research model to investigate the thermal adaptability for flexible operation. The results show that from the perspective of the source of steam extraction, the main steam extraction scheme is suitable for the flexible adjustment of peak load capacity, and the reheated extraction scheme is suitable for the flexible operation of low load and high thermal efficiency. Moreover, from the perspective of thermal performance adaptability, the 600 MW unit has a wider load regulation capacity than the 300 MW and 660 MW units, and is suitable as the peak shaving unit. This work can provide theoretical guidance for different types of coal-fired units in choosing flexible operation schemes.
关键词 ：
reheated steam extraction reheated steam extraction main steam extraction main steam extraction coal-fired power unit coal-fired power unit thermal energy storage thermal energy storage flexible operation flexible operation
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| GB/T 7714 | Wei, Haijiao , Lu, Yuanwei , Yang, Yanchun et al. Research on Thermal Adaptability of Flexible Operation in Different Types of Coal-Fired Power Units [J]. | ENERGIES , 2024 , 17 (9) . |
| MLA | Wei, Haijiao et al. "Research on Thermal Adaptability of Flexible Operation in Different Types of Coal-Fired Power Units" . | ENERGIES 17 . 9 (2024) . |
| APA | Wei, Haijiao , Lu, Yuanwei , Yang, Yanchun , Wu, Yuting , Zheng, Kaifeng , Li, Liang . Research on Thermal Adaptability of Flexible Operation in Different Types of Coal-Fired Power Units . | ENERGIES , 2024 , 17 (9) . |
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摘要 ：
Low melting point molten salt is vital for concentrating solar power plants. In order to obtain the low liquid operating temperature molten salt, phase diagram thermodynamic calculation method was used to predict the eutectic point of the KNO3-NaNO2-KNO2 system based on the liquidus of the three subsystems using the subregular solution model (SSM). To confirm the calculation accuracy, the ternary phase diagram was also predicated by FactSage 8.2 software and verified through experiments. The results of thermal analysis experiments indicated that the ternary phase diagram calculated by SSM had the higher accuracy. The preferred KNO3NaNO2-KNO2 ternary molten salt had the melting point of 139.8 degrees C and the composition of 42.0 mol%KNO3, 48.5 mol%NaNO2 and 9.5 mol%KNO2. The thermophysical properties and thermal stability experiments of the preferred molten salt showed that it had the excellent long-term thermal storage capacity. The sensible heat storage density and economics analysis indicated that the preferred molten salt was the recommended medium for heat transfer and thermal storage. The results demonstrated that the phase diagram thermodynamic method with SSM was an effective method to screen the new and the competitive candidate molten salts.
关键词 ：
Phase diagram calculation Phase diagram calculation Thermal energy storage Thermal energy storage Thermophysical property Thermophysical property Concentrating solar power Concentrating solar power Molten salt Molten salt
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| GB/T 7714 | Wang, Yuanyuan , Ma, Yancheng , Lu, Yuanwei et al. Phase diagram thermodynamic calculation of KNO3-NaNO2-KNO2 ternary system molten salt and its thermophysical properties investigation for thermal energy storage [J]. | JOURNAL OF ENERGY STORAGE , 2024 , 96 . |
| MLA | Wang, Yuanyuan et al. "Phase diagram thermodynamic calculation of KNO3-NaNO2-KNO2 ternary system molten salt and its thermophysical properties investigation for thermal energy storage" . | JOURNAL OF ENERGY STORAGE 96 (2024) . |
| APA | Wang, Yuanyuan , Ma, Yancheng , Lu, Yuanwei , Gao, Qi , Wu, Yuting , Wang, Yue et al. Phase diagram thermodynamic calculation of KNO3-NaNO2-KNO2 ternary system molten salt and its thermophysical properties investigation for thermal energy storage . | JOURNAL OF ENERGY STORAGE , 2024 , 96 . |
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摘要 ：
可调节的单螺杆压缩机回热式复叠低温制冷系统的监测及控制方法，属于调节系统的监视或测试装置领域。系统包括制冷剂回路以及监测‑控制电路，制冷剂回路由冷凝蒸发器将高温级和低温级回路连接，控制器同时连接压缩机电机、压缩机滑阀动力装置、节流元件、旁通元件、喷液控制元件、压力传感器和温度传感器。在设置目标制冷温度、制冷量后，通过各传感器的监测数据，指导控制器对各级系统的压缩机电机、压缩机滑阀动力装置、节流元件、旁通元件、喷液控制元件进行调节，实现变制冷温度、变制冷量、变电机频率、变压缩机内容积比、变过热/过冷温度、喷液、补气等功能，使得系统运行更加稳定，性能得到提升。
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| GB/T 7714 | 吴玉庭 , 封旭 , 雷标 et al. 可调节的单螺杆压缩机回热式复叠低温制冷系统的监测及控制方法 : CN202310199385.8[P]. | 2023-03-03 . |
| MLA | 吴玉庭 et al. "可调节的单螺杆压缩机回热式复叠低温制冷系统的监测及控制方法" : CN202310199385.8. | 2023-03-03 . |
| APA | 吴玉庭 , 封旭 , 雷标 , 鹿院卫 . 可调节的单螺杆压缩机回热式复叠低温制冷系统的监测及控制方法 : CN202310199385.8. | 2023-03-03 . |
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摘要 ：
本发明公开了低熔点五元混合熔盐传热蓄热材料与制备方法，所述材料由KNO3、NaNO3、Ca(NO3)2、NaNO2和KNO2所组成。具体比例如下：KNO3质量百分比为8～17％、NaNO3质量百分比为13～26％、Ca(NO3)2质量百分比为6～20％、NaNO2质量百分比为12～21％、KNO2质量百分比为31～45％。本发明所提供的低熔点五元混合熔盐传热蓄热材料的实测熔点为100℃左右，分解温度大于615℃，液态平均比热约为1.5J/(g·K)，成本低，腐蚀性小，流动性好，具有较大的比热容以及较宽的工作温度范围，并且具有良好的传热和蓄热性能，非常适用于太阳能光热发电、压缩空气储能、工业余热回收、熔盐热泵储热、低谷电蓄热供暖、火电厂灵活性改造等领域的传热蓄热。
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| GB/T 7714 | 鹿院卫 , 王元媛 , 吴玉庭 et al. 低熔点五元混合熔盐传热蓄热材料与制备方法 : CN202310209528.9[P]. | 2023-03-07 . |
| MLA | 鹿院卫 et al. "低熔点五元混合熔盐传热蓄热材料与制备方法" : CN202310209528.9. | 2023-03-07 . |
| APA | 鹿院卫 , 王元媛 , 吴玉庭 , 张灿灿 . 低熔点五元混合熔盐传热蓄热材料与制备方法 : CN202310209528.9. | 2023-03-07 . |
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摘要 ：
一种跨临界二氧化碳热泵熔盐储热发电系统，属于物理储能技术领域，该发电系统由跨临界二氧化碳布雷顿热泵/动力循环子系统、高温熔盐双罐液体显热储热子系统和固体填充床储冷子系统三部分组成。储热储冷过程中，跨临界二氧化碳循环系统通过逆向布雷顿热泵循环将电能转换成高温热能及冷能，并分别储存于高温熔盐罐和固体填充床中；释热释冷过程中，跨临界二氧化碳循环系统热通过正向布雷顿动力循环将储存的热能和冷能转换成电能。本发明提供的热泵熔盐储热发电系统，选择跨临界二氧化碳作为循环工质，混合熔盐、固体氯化钠或岩石分别作为储热、储冷材料，系统的设备体积紧凑且安全可靠，循环效率更好、储能密度更大。
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| GB/T 7714 | 吴玉庭 , 齐迪 , 张灿灿 et al. 一种跨临界二氧化碳热泵熔盐储热发电系统 : CN202310005769.1[P]. | 2023-01-01 . |
| MLA | 吴玉庭 et al. "一种跨临界二氧化碳热泵熔盐储热发电系统" : CN202310005769.1. | 2023-01-01 . |
| APA | 吴玉庭 , 齐迪 , 张灿灿 , 鹿院卫 . 一种跨临界二氧化碳热泵熔盐储热发电系统 : CN202310005769.1. | 2023-01-01 . |
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摘要 ：
一种可调节的单螺杆压缩机回热式复叠低温制冷系统，属于制冷技术领域。系统包括高温级回路、低温级回路以及控制器回路。高低温级压缩机均采用单螺杆复合滑阀压缩机，控制器调节滑阀移动可以对压缩机进行容量及内容积比调节。控制器同时连接压缩机电机，调节电机及螺杆转速，进一步增大输气量调节范围。各级系统设置补气、喷液回路连接各级压缩机对其进行增焓、降温。同时，各级系统对回热器增加了旁通回路，更好的调节制冷剂过冷、过热温度，以优化系统性能。此方法解决了变环境温度运行工况及变制冷量条件下系统不能更好匹配的问题，并且为此单螺杆压缩机回热式复叠低温制冷系统增加了多种调节方法来进行优化。
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| GB/T 7714 | 吴玉庭 , 封旭 , 雷标 et al. 一种可调节的单螺杆压缩机回热式复叠低温制冷系统 : CN202310037449.4[P]. | 2023-01-10 . |
| MLA | 吴玉庭 et al. "一种可调节的单螺杆压缩机回热式复叠低温制冷系统" : CN202310037449.4. | 2023-01-10 . |
| APA | 吴玉庭 , 封旭 , 雷标 , 鹿院卫 . 一种可调节的单螺杆压缩机回热式复叠低温制冷系统 : CN202310037449.4. | 2023-01-10 . |
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摘要 ：
Printed circuit heat exchanger (PCHE) is an essential part of supercritical CO2 (sCO(2)) Brayton cycle in the 3(rd) generation of concentrating solar power plant. Molten salt and sCO(2) as the heat transfer fluid in PCHE, it is of great significance to improve its thermal and hydraulic performance. To reach this goal, two new discontinuous fin channels of PCHE were designed and their thermal-hydraulic performance was studied by numerical simulation. The results show that the second discontinuous fins channel with the best comprehensive thermal-hydraulic performance for sCO(2), which has the Colburn j factor improvement by 2.1-4.6% and the Fanning friction factor f reduction by 3.8-6.4% compared with that of the airfoil fins; While the third discontinuous fins channel has the best hydraulic performance for both the heat transfer medium of molten salt and sCO(2), among which the pressure drop per unit length and f have the largest reduction by 0.05-24.7% and 5.91-19.1% for sCO(2), and by 25.62-29.39% and 1.35-2.4% for molten salt. As a result, the second and third discontinuous fins channel of PCHE are proposed to sCO(2) and molten salt, respectively, which can contribute to design the PCHE for the 3(rd) generation of solar thermal power generation.
关键词 ：
Heat transfer Heat transfer printed circuit heat exchanger printed circuit heat exchanger supercritical CO2 supercritical CO2 molten salt molten salt
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| GB/T 7714 | Yang, Yanchun , Lu, Yuanwei , Wei, Haijiao et al. Numerical study of thermal-hydraulic performance of sCO(2)-molten salt printed circuit heat exchanger with discontinuous fins channel [J]. | NUMERICAL HEAT TRANSFER PART A-APPLICATIONS , 2022 , 84 (3) : 198-218 . |
| MLA | Yang, Yanchun et al. "Numerical study of thermal-hydraulic performance of sCO(2)-molten salt printed circuit heat exchanger with discontinuous fins channel" . | NUMERICAL HEAT TRANSFER PART A-APPLICATIONS 84 . 3 (2022) : 198-218 . |
| APA | Yang, Yanchun , Lu, Yuanwei , Wei, Haijiao , Wu, Yuting , Gao, Qi . Numerical study of thermal-hydraulic performance of sCO(2)-molten salt printed circuit heat exchanger with discontinuous fins channel . | NUMERICAL HEAT TRANSFER PART A-APPLICATIONS , 2022 , 84 (3) , 198-218 . |
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