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学者姓名:吴玉庭
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Abstract :
Steam generating heat pump (SGHP) is a key technology for industrial decarbonization. For comprehensive evaluation of the feasibility and reliability of SGHP in different industrial sector, the work develops a thorough evaluation model for assessing the performance of SGHP by considering waste heat recovery, CO2 trading value, and pollutant emission cost, in addition to the conventional evaluation criteria. This work presents a thorough comparison of the thermodynamic performance and sustainability of various types of SGHPs across different industrial sector. Additionally, the conflicting relationships between the coefficient of performance (COP) and exergy efficiency are balanced through the application of the technique for order preference by similarity to ideal solution (TOPSIS). The results show that all the indexes of SGHP connected to an open heat pump (SGHPO) with different application scenarios are higher than those of SGHP connected to a flash tank (SGHPF). At the most unfavorable operating condition of the system, the COP minimum value is 1.31 and the exergy efficiency minimum value is 20.42%. These results indicate that replacing the coal-fired boiler with SGHP is feasible and the work could provide theoretical guidance for optimal design and equipment manufacture. center dot A more comprehensive SGHP valuation model that takes into account the waste heat recovery, CO2 trading value, and pollutant emission cost is proposed.center dot The SGHPs are classified, compared, and analyzed comprehensively, with design and optimization recommendations provided.center dot Optimal balance between COP and exergy efficiency of a SGHP using the TOPSIS method.
Keyword :
Carbon neutrality Carbon neutrality Heat pump evaluation Heat pump evaluation Industrial decarbonization Industrial decarbonization Economic analysis Economic analysis Steam generating heat pump Steam generating heat pump
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GB/T 7714 | Ma, Xudong , Wu, Yuting , Du, Yanjun et al. Comprehensive performance evaluation of steam generating heat pumps for industrial waste heat recovery [J]. | CARBON NEUTRALITY , 2024 , 3 (1) . |
MLA | Ma, Xudong et al. "Comprehensive performance evaluation of steam generating heat pumps for industrial waste heat recovery" . | CARBON NEUTRALITY 3 . 1 (2024) . |
APA | Ma, Xudong , Wu, Yuting , Du, Yanjun , Zhang, Cancan , Lei, Biao , Lu, Yuanwei . Comprehensive performance evaluation of steam generating heat pumps for industrial waste heat recovery . | CARBON NEUTRALITY , 2024 , 3 (1) . |
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Abstract :
为了研究超临界CO_2的传热性能并提高其换热性能,通过采用超临界CO_2作为传热流体,以翼型翅片为例,使用数值模拟的方法探究了印刷电路板换热器内的不连续翅片通道,分析了几种翅片布置方式的传热和阻力性能,得出了翅片的最佳布置方式。同时通过场协同理论,即通过分析温度场、压力场和速度场之间的协同性对模拟结果进行分析与讨论。结果表明,当交错距离为4 mm时,其传热性能与阻力性能均为最优,拥有最小的温度场与速度场协同角和最大的压力场与速度场协同角,表明这种布置方式可以使温度场与速度场的协同性和压力场与速度场的协同性均为最优,且它们之间的协同性均随着入口质量流量的增大而变差。
Keyword :
传热 传热 印刷电路板换热器 印刷电路板换热器 协同角 协同角 数值模拟 数值模拟 场协同 场协同 超临界CO_2 超临界CO_2
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GB/T 7714 | 杨彦春 , 鹿院卫 , 吴玉庭 et al. 印刷电路板换热器内翅片布置方式的场协同分析与讨论 [J]. | 北京工业大学学报 , 2024 , (05) : 1-10 . |
MLA | 杨彦春 et al. "印刷电路板换热器内翅片布置方式的场协同分析与讨论" . | 北京工业大学学报 05 (2024) : 1-10 . |
APA | 杨彦春 , 鹿院卫 , 吴玉庭 , 魏海姣 . 印刷电路板换热器内翅片布置方式的场协同分析与讨论 . | 北京工业大学学报 , 2024 , (05) , 1-10 . |
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Abstract :
As one of classic organic compounds, pentaerythritol (PE) has been reported to have two phase-change processes with one solid-solid transition and other solid-liquid transition. To utilize these two phase-change enthalpies and avoid the liquid leakage over heat storage process, this work for the first time proposes to encapsulate PE with use of silicon dioxide (SiO2) as a shell substance through a so-called so-gel technology. The microstructure characterization and thermoproperties as well as the cycling performance of the PE- SiO2 composite are detailedly investigated. The results showed that PE could be successfully covered by SiO2 to form a spherical core-shell structure. Such an encapsulation has a mean size of 0.3 mu m and an encapsulated rate of over 77.8 %. Due to the involvement of two phase-transition stages, the latent heat of the PE- SiO2 composite reached to 255 kJ/kg, which is higher than other organic microencapsulations. In addition, the thermal conductivity is largely enhanced by adjusting the ratio of SiO2. For a given SiO2 ratio of 77.8 %, the thermal conductivity of PE-SiO2 composite is 0.93 W/mK, 36.8 % higher than that of pristine PE. Apart from these, the results also indicated that the composite achieves excellent thermal cycling performance. After one hundred repeated heating-cooling cycles, the latent heat of the PE- SiO2 composite decreases by less than 5 %, demonstrating that this composite material has a large potential for application in the field of thermal energy storage at low and medium temperatures.
Keyword :
Pentaerythritol Pentaerythritol Sol-gel method Sol-gel method Phase change performance Phase change performance Phase change microcapsule Phase change microcapsule Thermal energy storage Thermal energy storage
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GB/T 7714 | Wang, Xuanxuan , Wu, Yuting , Li, Chuan et al. Preparation and thermal properties investigation of pentaerythritol based phase change microcapsules for low and medium temperature thermal energy storage [J]. | JOURNAL OF ENERGY STORAGE , 2024 , 100 . |
MLA | Wang, Xuanxuan et al. "Preparation and thermal properties investigation of pentaerythritol based phase change microcapsules for low and medium temperature thermal energy storage" . | JOURNAL OF ENERGY STORAGE 100 (2024) . |
APA | Wang, Xuanxuan , Wu, Yuting , Li, Chuan , Lu, Yuanwei , Zhang, Cancan , Hong, Ming . Preparation and thermal properties investigation of pentaerythritol based phase change microcapsules for low and medium temperature thermal energy storage . | JOURNAL OF ENERGY STORAGE , 2024 , 100 . |
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Abstract :
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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Abstract :
压缩空气储能具有寿命长、成本低、环境污染小等优点而备受关注,然而压缩空气储能系统存在能量密度和效率低的问题,本工作提出了气动马达并联工作模式以提高压缩空气储能系统的输出功率、能量转换效率和经济性。通过对比分析了在气动马达并联工作和单独工作时,关键参数变化对气动马达输出功率、经济性和能量转换效率的影响规律。为了将微型压缩空气储能系统的膨胀机和压缩机一体化,本工作研究了气动马达正转和反转的性能。气动马达既作为膨胀机又作为压缩机,可以双模式运行,提高设备的利用率,降低压缩空气储能系统的成本。与可再生能源发电相结合的应用场景中,变工况运行是压缩空气储能系统面临的一个关键问题。以储气罐压力变化和负荷需求波动为代表的多种变工况条件在系统运行过程中常常同时存在,本工作在变工况条件下,通过试验研究了关键因素对压缩空气储能系统性能的影响情况。试验结果表明,采用气动马达并联工作模式可以提高压缩空气储能系统的输出功率、能量转换效率和经济性。当进气压力为10.5 bar(1 bar=100 kPa)时,气动马达和发电机输出功率的最大值约为660 W和380 W。
Keyword :
输出功率 输出功率 并联模式 并联模式 压缩空气储能系统 压缩空气储能系统 气动马达 气动马达
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GB/T 7714 | 许永红 , 吴玉庭 , 张红光 et al. 基于气动马达的微型压缩空气储能系统的试验研究 [J]. | 储能科学与技术 , 2023 , 12 (06) : 1854-1861 . |
MLA | 许永红 et al. "基于气动马达的微型压缩空气储能系统的试验研究" . | 储能科学与技术 12 . 06 (2023) : 1854-1861 . |
APA | 许永红 , 吴玉庭 , 张红光 , 杨富斌 , 王焱 . 基于气动马达的微型压缩空气储能系统的试验研究 . | 储能科学与技术 , 2023 , 12 (06) , 1854-1861 . |
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Abstract :
Molten salt is an excellent medium for heat transfer and storage. The unique microstructure of carbon nanomaterials leads to good mechanical stability, low density, high thermal conductivity, and high strength, etc. The addition of carbon nanomaterials to molten salt to form molten salt nanofluid can remarkably enhance the specific heat capacity and thermal conductivity of molten salt and reduce the molten salt viscosity, which is of great importance to increase the heat storage density and reduce the heat storage cost. Nevertheless, some challenges remain in the study of such nanofluids. The main challenge is the dispersion stability of carbon nanomaterials. Therefore, to improve research on carbon nanofluids, this paper summarizes the progress of carbon-based molten salt nanofluid research worldwide including the preparation methods of molten salt nanofluids, the improvement of heat transfer performance, and the improvement of heat storage performance. The effects of carbon nanoparticle concentration, size, and type on the heat transfer and storage performance of molten salt are derived, and the effects of nanoparticle shape on the heat transfer performance of molten salt are analyzed while more promising preparation methods for carbon-based molten salt nanofluids are proposed. In addition, the future problems that need to be solved for high-temperature molten salt-based carbon nanofluids are briefly discussed.
Keyword :
nanofluids nanofluids molten salt molten salt carbon materials carbon materials enhanced heat transfer enhanced heat transfer solar energy solar energy
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GB/T 7714 | Chen, Xia , Zhang, Mingxuan , Wu, Yuting et al. Advances in High-Temperature Molten Salt-Based Carbon Nanofluid Research [J]. | ENERGIES , 2023 , 16 (5) . |
MLA | Chen, Xia et al. "Advances in High-Temperature Molten Salt-Based Carbon Nanofluid Research" . | ENERGIES 16 . 5 (2023) . |
APA | Chen, Xia , Zhang, Mingxuan , Wu, Yuting , Ma, Chongfang . Advances in High-Temperature Molten Salt-Based Carbon Nanofluid Research . | ENERGIES , 2023 , 16 (5) . |
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Abstract :
通过Excel软件计算,对螺杆直径为117 mm的单螺杆压缩机进行了热力学计算,使用的工质为R22制冷剂,绘制了压缩机在设定工况下工作的压焓图,模拟计算了压缩机在开启喷液的情况下,压缩机的排气温度,制冷量,压缩机功率和COP的变化情况.计算结果表明:喷液量从主路流量的0%增加到5%,排气温度从102.26℃降低到86.6℃,降低15.31%;蒸发器的制冷量从32 kW下降到30.4 kW,制冷量下降了5%;压缩机功率从12.87 kW降低到10.85 kW,下降15.6%;系统的制冷系数COP从2.48增加到2.80,COP提升了12.9%.
Keyword :
排气温度 排气温度 单螺杆压缩机 单螺杆压缩机 喷液 喷液 COP COP
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GB/T 7714 | 陈飞 , 吴玉庭 , 沈纪东 et al. 喷液对单螺杆压缩机性能影响的热力学分析 [J]. | 制冷与空调 , 2023 , 23 (1) : 33-37 . |
MLA | 陈飞 et al. "喷液对单螺杆压缩机性能影响的热力学分析" . | 制冷与空调 23 . 1 (2023) : 33-37 . |
APA | 陈飞 , 吴玉庭 , 沈纪东 , 张大鹏 , 温强宇 . 喷液对单螺杆压缩机性能影响的热力学分析 . | 制冷与空调 , 2023 , 23 (1) , 33-37 . |
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Abstract :
冷凝环境条件的季节性变化会对有机朗肯循环系统的性能和膨胀机的运行工况产生重大的影响。采用新型准二级膨胀单螺杆膨胀机是确保有机朗肯循环系统实现跨季节高效运行的有效举措。该文通过建立准二级膨胀单螺杆膨胀机和变冷凝环境条件下有机朗肯循环系统的耦合模型,揭示了冷凝环境条件、准二级膨胀单螺杆膨胀机的性能和有机朗肯循环最佳工况点之间的关联机理。同时,对准二级膨胀单螺杆膨胀机的内容积比进行优化分析。结果表明:引入速度膨胀过程可以降低膨胀机的最优内容积比,提高膨胀机的最佳等熵效率,其中最优内容积比从6.0降低到4.86,此时对应的最佳等熵效率从0.679增加至0.692。循环净功率和净效率均存在最优值,当湿球温度为5℃,内容积比为4.0时,循环净功率最高达13.87kW,内容积比为8.0时,循环净效率最高达12.66%;利用准二级膨胀单螺杆膨胀机可以显著提升变冷凝环境条件下有机朗肯循环系统的性能,系统最大净功率和最大净效率分别提升了4.51%和0.59%。
Keyword :
冷凝环境 冷凝环境 优化分析 优化分析 有机朗肯循环 有机朗肯循环 内容积比 内容积比 准二级膨胀 准二级膨胀
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GB/T 7714 | 王海啸 , 雷标 , 吴玉庭 . 变冷凝环境条件下基于准二级膨胀单螺杆膨胀机的有机朗肯循环性能优化 [J]. | 中国电机工程学报 , 2023 , 43 (11) : 4160-4169 . |
MLA | 王海啸 et al. "变冷凝环境条件下基于准二级膨胀单螺杆膨胀机的有机朗肯循环性能优化" . | 中国电机工程学报 43 . 11 (2023) : 4160-4169 . |
APA | 王海啸 , 雷标 , 吴玉庭 . 变冷凝环境条件下基于准二级膨胀单螺杆膨胀机的有机朗肯循环性能优化 . | 中国电机工程学报 , 2023 , 43 (11) , 4160-4169 . |
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Abstract :
流体机械综合性能提升有利于提高能源系统能效,引入多目标优化方法对流体机械展开性能优化研究,可以进一步改善流体机械整体性能。因此针对多目标优化方法在流体机械性能优化中的应用展开了综述。首先总结了多种流体机械多目标性能优化现状,其次简要介绍了多目标优化的基础概念,并概述了常用的几种优化算法及其在流体机械中的相关应用。流体机械多目标优化的基础是性能预测,性能预测方法的优劣对于多目标优化效果有着决定性影响。对流体机械性能预测方法展开了分析讨论,重点探讨了近似模型技术,详细介绍了最常用的几种近似模型并总结其在流体机械优化中的应用。最后提出了目前优化中存在的问题,为日后流体机械多目标优化研究提供参考。
Keyword :
Multi-Objective Optimization Multi-Objective Optimization Approximation Model Approximation Model 多目标优化 多目标优化 Optimization Algorithm Optimization Algorithm Fluid Machinery Fluid Machinery 近似模型 近似模型 流体机械 流体机械 优化算法 优化算法
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GB/T 7714 | 陶粤婷 , 王伟 , 吴玉庭 et al. 多目标优化在流体机械中的应用研究综述 [J]. | 可持续能源 , 2023 , 13 (6) : 69-80 . |
MLA | 陶粤婷 et al. "多目标优化在流体机械中的应用研究综述" . | 可持续能源 13 . 6 (2023) : 69-80 . |
APA | 陶粤婷 , 王伟 , 吴玉庭 , 马重芳 . 多目标优化在流体机械中的应用研究综述 . | 可持续能源 , 2023 , 13 (6) , 69-80 . |
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Abstract :
为探究本实验室配制的新型混合低熔点熔融四元硝酸盐与太阳能热发电系统中不锈钢合金的相容性,在搭建的动态腐蚀试验台进行实验条件为565℃,流速分别为0.6、1.3和2.0m/s下1000 h304不锈钢的动态腐蚀试验.实验结果表明:3种流速下304不锈钢均发生了氧化腐蚀.腐蚀失重随腐蚀时间的增加均呈现增加的趋势,变化规律更接近抛物线关系.同时,流速的变化会对腐蚀产生影响.此外,流速的增加对试片表面生成的腐蚀产物类型无影响.
Keyword :
熔盐 熔盐 动态 动态 腐蚀 腐蚀 太阳能热发电 太阳能热发电 不锈钢 不锈钢
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GB/T 7714 | 马丽娜 , 吴玉庭 , 张灿灿 et al. 奥氏体不锈钢在四元硝酸盐中的动态腐蚀行为研究 [J]. | 太阳能学报 , 2023 , 44 (3) : 497-503 . |
MLA | 马丽娜 et al. "奥氏体不锈钢在四元硝酸盐中的动态腐蚀行为研究" . | 太阳能学报 44 . 3 (2023) : 497-503 . |
APA | 马丽娜 , 吴玉庭 , 张灿灿 , 鹿院卫 , 董彦召 , 焦新亮 . 奥氏体不锈钢在四元硝酸盐中的动态腐蚀行为研究 . | 太阳能学报 , 2023 , 44 (3) , 497-503 . |
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