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Techno-economic-environmental analysis of coal-based methanol and power poly-generation system integrated with biomass co-gasification and solar based hydrogen addition EI SCIE
期刊论文 | 2021 , 228 | Energy Conversion and Management
WoS CC Cited Count: 4
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Abstract :

Raising the share of renewable energy in energy structure is an essential approach to relieve global warming. The feasibility of the integration of renewable energy with fossil fuels for chemical production to reduce greenhouse gas (GHG) emission should be comprehensively evaluated before the project decision-making. In this study, a novel conceptual design is developed to reveal the effects of the addition of hydrogen-rich sources from biomass co-gasification and solar based hydrogen on the techno-economic-environmental performance of coal-based methanol and power poly-generation process. The results show that when the coal feeding is constant at 100 t/h and biomass is added from 0 to 40 t/h, the energy efficiency decreases from 53.56% to 51.64% while the unit GHG emission decreases by 24.34%. In the case of constant total feeding, even though the biomass addition benefits the decline of unit GHG emission, both energy efficiency and unit energy production cost show worse performance. Besides, the addition of solar based hydrogen from 600 kmol/h to 1000 kmol/h can enhance the carbon element utilization rate from 39.41% to 41.49% but deteriorate the performance of energy efficiency and economy. Hence the integration of renewable energy with fossil fuels for chemical production is not always beneficial for the overall performance. The process analysis in this study can provide some significant guidelines for the integration of renewable energy in coal-based methanol process. © 2020 Elsevier Ltd

Keyword :

Global warming Conceptual design Greenhouse gases Hydrogen economy Coal industry Economic analysis Environmental management Gas generators Gasification Methanol Integration Coal Solar power generation Biomass Decision making Energy efficiency

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GB/T 7714 Qin, Zhen , Tang, Yuting , Zhang, Zaoxiao et al. Techno-economic-environmental analysis of coal-based methanol and power poly-generation system integrated with biomass co-gasification and solar based hydrogen addition [J]. | Energy Conversion and Management , 2021 , 228 .
MLA Qin, Zhen et al. "Techno-economic-environmental analysis of coal-based methanol and power poly-generation system integrated with biomass co-gasification and solar based hydrogen addition" . | Energy Conversion and Management 228 (2021) .
APA Qin, Zhen , Tang, Yuting , Zhang, Zaoxiao , Ma, Xiaoqian . Techno-economic-environmental analysis of coal-based methanol and power poly-generation system integrated with biomass co-gasification and solar based hydrogen addition . | Energy Conversion and Management , 2021 , 228 .
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Gas recognition method based on the deep learning model of sensor array response map EI SCIE
期刊论文 | 2021 , 330 | Sensors and Actuators, B: Chemical
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Abstract :

It is important to detect and recognize the unknown gases or VOCs (Volatile Organic Compounds) in industrial safety issues. Electronic nose is a novel and portable method to detect the VOCs with high accuracy combined with sensor array and artificial intelligence algorithm. The results indicated that the multidimensional dynamic response signals of the sensor array can be viewed as the image form. Thus, a new method coupled dynamic response map with deep learning model (DLM) was proposed to improve the accuracy of the sensor array. The error-correcting output codes (ECOC) model with support vector machine (SVM) learners was applied to discriminate different VOCs. The results showed that the model with the data from the sensor array classified the VOCs more accurately than that with just single sensor. Further, a simple DLM network was trained to classify the VOCs with the accuracy of 92 %. Then the transferred VGG-19 model was further adapted to improve the generalization property of DLM with the accuracy of 90 %. Moreover, all sensors’ responses at certain time were normalized before building the model, which enhanced the prediction accuracy to 96 % for simple DLM and 94 % for transferred VGG-19. Finally, the concentrations of different substances were predicted with SVM and DLM. The results showed that the prediction error of SVM and DLM with multidimensional response map is lower that with the data from single sensor. Therefore, it is a feasible tool to detect VOCs with just one sensor module using the response map-DLM method proposed in this research. © 2020 Elsevier B.V.

Keyword :

Dynamic response Support vector machines Volatile organic compounds Risk management Accident prevention Lagrange multipliers Electronic nose Deep learning Learning systems

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GB/T 7714 Ma, Denglong , Gao, Jianmin , Zhang, Zaoxiao et al. Gas recognition method based on the deep learning model of sensor array response map [J]. | Sensors and Actuators, B: Chemical , 2021 , 330 .
MLA Ma, Denglong et al. "Gas recognition method based on the deep learning model of sensor array response map" . | Sensors and Actuators, B: Chemical 330 (2021) .
APA Ma, Denglong , Gao, Jianmin , Zhang, Zaoxiao , Zhao, Hong . Gas recognition method based on the deep learning model of sensor array response map . | Sensors and Actuators, B: Chemical , 2021 , 330 .
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Insights into a Thermodynamically Optimal Synthesis of the Ternary Complex Hydride Mg2FeH6 for High-Density Thermal Energy Storage EI SCIE
期刊论文 | 2021 , 4 (6) , 5973-5984 | ACS APPLIED ENERGY MATERIALS
WoS CC Cited Count: 1
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Abstract :

Mg2FeH6 hydride has been viewed as a high-density and efficient material for thermal energy storage systems. However, the synthesis of the pure hydride is still a big problem for its application. This work combines experiment and density functional theory calculations to explore the conditions under which the synthesis is thermodynamically optimal. The experimental results show that Mg2FeH6 can be successfully synthesized by reactive ball milling within 5 h. The synthesis mechanism is revealed by numerical simulation to be indirect hydrogenation in two steps: one accelerating mode, in which MgH2 is probably formed with the reaction enthalpy of 75.57 kJ/mol H-2, and then, a sluggish mode, in which the evolution of Mg2FeH6 happens via the reaction between MgH2 and Fe with the reaction enthalpy of 65.27 kJ/mol H-2. In addition, the rehydrogenation of the mixture under low pressure and high temperature >400 degrees C results in a high degree of crystallinity of Mg2FeH6 and a maximum hydrogen capacity of 5.01 wt %.

Keyword :

DFT calculation high-energy reactive ball milling optimized synthesis Mg2FeH6 heat treatment energy barrier

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GB/T 7714 Nyamsi, Serge Nyallang , Wu, Zhen , Guo, Leilei et al. Insights into a Thermodynamically Optimal Synthesis of the Ternary Complex Hydride Mg2FeH6 for High-Density Thermal Energy Storage [J]. | ACS APPLIED ENERGY MATERIALS , 2021 , 4 (6) : 5973-5984 .
MLA Nyamsi, Serge Nyallang et al. "Insights into a Thermodynamically Optimal Synthesis of the Ternary Complex Hydride Mg2FeH6 for High-Density Thermal Energy Storage" . | ACS APPLIED ENERGY MATERIALS 4 . 6 (2021) : 5973-5984 .
APA Nyamsi, Serge Nyallang , Wu, Zhen , Guo, Leilei , Qian, Chenhui , Sun, Lixian , Xu, Fen et al. Insights into a Thermodynamically Optimal Synthesis of the Ternary Complex Hydride Mg2FeH6 for High-Density Thermal Energy Storage . | ACS APPLIED ENERGY MATERIALS , 2021 , 4 (6) , 5973-5984 .
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Large Eddy Simulation Investigations of Periodic Cavitation Shedding With Special Emphasis on Three-Dimensional Asymmetry in a Scaled-Up Nozzle Orifice EI SCIE
期刊论文 | 2021 , 143 (7) | JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
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Abstract :

The periodic shedding of cloud cavitation in a nozzle orifice has a significant influence on the flow field and may have destructive effects. Most of the existing research on the shedding of cloud cavitation in an orifice is based on experimental visualization with a focus on the two-dimensional (2D) motion of the re-entrant jet and the shedding mechanism. However, the actual cloud cavitation shedding in an orifice is a complex three-dimensional (3D) process. Some limited signs of three-dimensionality and asymmetry in cylindrical orifices have been detected recently, but the 3D shedding characteristics remain unclear. In this paper, the cavitation regimes and periodic shedding process in the scaled-up nozzle orifice used by the Stanley experiment were simulated with large eddy simulation (LES). The re-entrant jet and periodic shedding mechanism, as well as, the shedding frequency, were analyzed from 2D and 3D perspectives. The main results show that the simulated cavitation regimes and the 2D periodic shedding mechanism agree fairly well with the experimental observations, but more 3D features are revealed. By analyzing the 3D shedding process and the three-dimensionality caused by the inclination of the closure line, the three-dimensional asymmetric shedding mode with phase difference pi is revealed. Based upon this finding, the shedding frequency, and Strouhal number are calculated. The corresponding relationships between shedding frequencies and the frequency peaks of the power spectrum density (PSD) for pressure fluctuations are also confirmed. These results extend the understanding of the unsteady cavitating flow within nozzle orifices from 2D to 3D patterns.

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GB/T 7714 Bai, Wenjie , Tijsseling, Arris S. , Wang, Jun et al. Large Eddy Simulation Investigations of Periodic Cavitation Shedding With Special Emphasis on Three-Dimensional Asymmetry in a Scaled-Up Nozzle Orifice [J]. | JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME , 2021 , 143 (7) .
MLA Bai, Wenjie et al. "Large Eddy Simulation Investigations of Periodic Cavitation Shedding With Special Emphasis on Three-Dimensional Asymmetry in a Scaled-Up Nozzle Orifice" . | JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME 143 . 7 (2021) .
APA Bai, Wenjie , Tijsseling, Arris S. , Wang, Jun , Duan, Quan , Zhang, Zaoxiao . Large Eddy Simulation Investigations of Periodic Cavitation Shedding With Special Emphasis on Three-Dimensional Asymmetry in a Scaled-Up Nozzle Orifice . | JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME , 2021 , 143 (7) .
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Development status and prospect of dry and wet combined cooling system technology EI
期刊论文 | 2021 , 40 (1) , 21-30 | Chemical Industry and Engineering Progress
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Abstract :

Cooling systems play an important role in industrial processes. The wet and/or dry cooling system have obvious advantages and disadvantages. The wet cooling unit possesses higher thermal economics, however, it is limited by the large water consumption due to the relative shortage of water resources in China. The dry cooling systems also have many tough issues to be solved, such as huge investment, limitations of environmental temperature and other conditions. The dry and wet combined cooling system is the development trend of cooling system in coal chemical, petrochemical, and power industries, which combines the advantages of dry cooling system and wet cooling system. Based on the development of the dry cooling system and wet cooling system, the formation and classification of the dry and wet combined cooling system are summarized. This study investigated the latest status of the system model, main equipment and optimization of the dry and wet combined cooling systems. On this basis, the application of water-saving demisting, dew point cooling and other technologies in the dry and wet combined cooling systems were summarized, and the further research directions were prospected. It is of great significance for the theoretical research, engineering practice and system operation of the dry and wet combined cooling system. © 2021, Chemical Industry Press Co., Ltd. All right reserved.

Keyword :

Water conservation Water resources Thermoelectric equipment Cooling systems Cooling Economics Coal industry

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GB/T 7714 Zhang, Ziqian , Zhang, Zaoxiao , Zhang, Qiang . Development status and prospect of dry and wet combined cooling system technology [J]. | Chemical Industry and Engineering Progress , 2021 , 40 (1) : 21-30 .
MLA Zhang, Ziqian et al. "Development status and prospect of dry and wet combined cooling system technology" . | Chemical Industry and Engineering Progress 40 . 1 (2021) : 21-30 .
APA Zhang, Ziqian , Zhang, Zaoxiao , Zhang, Qiang . Development status and prospect of dry and wet combined cooling system technology . | Chemical Industry and Engineering Progress , 2021 , 40 (1) , 21-30 .
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Liquid metal with solvents for CO2 capture EI SCIE
期刊论文 | 2021 , 11 (5) , 988-1000 | GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
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Carbon dioxide (CO2) capture is an essential method for emission control. In CO2 capture, although with the promising advantage of industrial application, chemical absorption meets the challenge of substantial energy consumption. Thus, an advanced solvent with liquid metal GaInSn/PANI/TEMPO has been first developed to reduce the energy consumption. The intensified thermoelectric effect between GaInSn/PANI/TEMPO has the potential to enhance the CO2 desorption. Density functional theory (DFT) model and spherical mass transfer and energy transfer model in the nanoscale are developed to study the mass and energy transfer in CO2 and GaInSn/PANI/TEMPO. The CO2 fraction, electron density, and velocity in the nanodomain are studied. The symmetrical electron density zone is identified for the thermoelectric effect. The mass transfer coefficient is increased by twofolds. The thermoelectric conversion amount reaches 32.6-44.8% and the energy consumption is reduced to 1.07 GJ t(-1). The CO2 desorption is finally proven to occur at temperature below 339 K. (c) 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.

Keyword :

mass transfer thermoelectric effect carbon dioxide absorption energy transfer

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GB/T 7714 Zhang, Chen , Yu, Yunsong , Zhou, Chenyang et al. Liquid metal with solvents for CO2 capture [J]. | GREENHOUSE GASES-SCIENCE AND TECHNOLOGY , 2021 , 11 (5) : 988-1000 .
MLA Zhang, Chen et al. "Liquid metal with solvents for CO2 capture" . | GREENHOUSE GASES-SCIENCE AND TECHNOLOGY 11 . 5 (2021) : 988-1000 .
APA Zhang, Chen , Yu, Yunsong , Zhou, Chenyang , Zhang, Jingfeng , Zhang, Zaoxiao , Wang, Geoff G. X. . Liquid metal with solvents for CO2 capture . | GREENHOUSE GASES-SCIENCE AND TECHNOLOGY , 2021 , 11 (5) , 988-1000 .
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Prediction of thermally induced failure for electronic equipment based on an artificial olfactory system EI SCIE Scopus
期刊论文 | 2021 , 32 (3) | MEASUREMENT SCIENCE AND TECHNOLOGY
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Abstract :

The failure of electronic equipment causes serious consequences and even catastrophic fires. Abnormal thermal signals are one of the main characteristics of the failure of electronic equipment. Thus, a new method for recognizing and predicting the thermally induced failure states of electronic equipment was proposed, based on an artificial olfactory system (AOS). The AOS recognizes the state of the volatile components released during the early stages of thermally induced failure and uses it to predict the state of health of the electronic equipment. Some typical electronic devices, such as microcomputer units, electronic rectifiers, transformers, and battery modules, were tested with the AOS to recognize the failures indicated by abnormal thermal accumulation. Compared with infrared thermal imagers and gas analyzers, the PEN3 electronic nose was utilized to monitor the status of the devices under different thermal failure scenarios. It was found that infrared thermal imaging was only able to monitor the local surface temperature, and the air temperature in the device chamber changed slowly with the surface temperature of the electronic modules. However, the AOS was able to detect the abnormal change in the whole chamber. Linear discriminant analysis (LDA) and principal component analysis (PCA) were then adopted to investigate the features of thermally induced failure for different thermal states. The results showed that the models obtained both from LDA and PCA were able to distinguish the different states of the electronic devices. Furthermore, a support vector machine model was built, based on the AOS data, to recognize and predict the thermally induced failure processes. All the failure states of the electronic devices caused by thermal simulations were recognized successfully and the prediction accuracy was above 95%. Hence, the experimental results of this research proved that using the AOS, it is feasible to predict the thermally induced failure states of electronic equipment, and the failure of electronic devices can be forecast in advance, before the obvious temperature rise and smoke release. Moreover, the method proposed in this research can also be applied to the prediction of, and warning about, electrical fires, indoor fires, and other thermally induced accidents.

Keyword :

AOS electronic nose electronic equipment linear discriminant analysis failure principal component analysis

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GB/T 7714 Ma, Denglong , Liu, Yuan , Zheng, Liangtian et al. Prediction of thermally induced failure for electronic equipment based on an artificial olfactory system [J]. | MEASUREMENT SCIENCE AND TECHNOLOGY , 2021 , 32 (3) .
MLA Ma, Denglong et al. "Prediction of thermally induced failure for electronic equipment based on an artificial olfactory system" . | MEASUREMENT SCIENCE AND TECHNOLOGY 32 . 3 (2021) .
APA Ma, Denglong , Liu, Yuan , Zheng, Liangtian , Gao, Jianmin , Gao, Zhiyong , Zhang, Zaoxiao . Prediction of thermally induced failure for electronic equipment based on an artificial olfactory system . | MEASUREMENT SCIENCE AND TECHNOLOGY , 2021 , 32 (3) .
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Adsorption mechanism of CO2 on the single atom doped or promoted Li4SiO4(010) surface from first principles SCIE
期刊论文 | 2021 , 1205 | COMPUTATIONAL AND THEORETICAL CHEMISTRY
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The removal of CO2 by lithium silicate is of great significance to alleviate global warming. In order to understand the micro mechanism of the interaction between CO2 and lithium silicate, density functional theory model is developed to explore the effects of B, Al and Ga as dopants and promoters on the CO2 adsorption performance of lithium silicate. Adsorption energy, charge transfer and desorption barrier of CO2 are calculated. It is found that CO2 combines with the lattice oxygen atom on the surface with C atom, and the adsorption energy is -1.91 eV. The doping of B, Al and Ga to Si atom in lithium silicate intensifies the adsorption of CO2 and inhibits the desorption of CO2. Doping of B, Al and Ga to Li atom has the opposite effect. These results provide the interaction mechanism between CO2 and lithium silicate and show the strategy to modify lithium silicate for CO2 capture.

Keyword :

Li4SiO4(010) Surface adsorption Promoters Density functional theory Carbon dioxide Dopants

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GB/T 7714 Zhang, Chen , Zhang, Jingfeng , Yu, Yunsong et al. Adsorption mechanism of CO2 on the single atom doped or promoted Li4SiO4(010) surface from first principles [J]. | COMPUTATIONAL AND THEORETICAL CHEMISTRY , 2021 , 1205 .
MLA Zhang, Chen et al. "Adsorption mechanism of CO2 on the single atom doped or promoted Li4SiO4(010) surface from first principles" . | COMPUTATIONAL AND THEORETICAL CHEMISTRY 1205 (2021) .
APA Zhang, Chen , Zhang, Jingfeng , Yu, Yunsong , Zhang, Zaoxiao , Wang, Geoff G. X. . Adsorption mechanism of CO2 on the single atom doped or promoted Li4SiO4(010) surface from first principles . | COMPUTATIONAL AND THEORETICAL CHEMISTRY , 2021 , 1205 .
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Characterizing the performance of a single atom fluid EI SCIE
期刊论文 | 2021 , 341 | JOURNAL OF MOLECULAR LIQUIDS
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In order to support the sustainable development goals, a new single atom fluid is developed where single atom coexistent in solvents mixture. The single atom fluid of Ni/PANI/PyBIG outstandings thermoelectric properties. This fluid simultaneously shows high activity and fluidity due to the intensification effect of single atom. The temperature, pressure and weight fraction of Ni are observed to significantly influence the thermoelectric effect and activity by experiment and DFT simulation. It is found that the Seebeck coefficient and potential are almost increased by 100% as the temperature difference increases from 40 K to 70 K. An increase of weight fraction from 0.1% to 0.4% improves the Seebeck coefficient and the potential by 49.92% and 1.66 times, respectively. An interesting slag phenomenon is also identified. The single atom fluid has wide industrial application value. Crown Copyright (C) 2021 Published by Elsevier B.V. All rights reserved.

Keyword :

Stability Single atom fluid Activity Thermoelectric effect Fluidity

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GB/T 7714 Yu, Yunsong , Zhang, Chen , Zhang, Jingfeng et al. Characterizing the performance of a single atom fluid [J]. | JOURNAL OF MOLECULAR LIQUIDS , 2021 , 341 .
MLA Yu, Yunsong et al. "Characterizing the performance of a single atom fluid" . | JOURNAL OF MOLECULAR LIQUIDS 341 (2021) .
APA Yu, Yunsong , Zhang, Chen , Zhang, Jingfeng , Zhou, Chenyang , Zhang, Zaoxiao , Wang, Geoff G. X. . Characterizing the performance of a single atom fluid . | JOURNAL OF MOLECULAR LIQUIDS , 2021 , 341 .
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Achieving high-efficiency conversion and poly-generation of cooling, heating, and power based on biomass-fueled SOFC hybrid system: Performance assessment and multi-objective optimization EI SCIE
期刊论文 | 2021 , 240 | ENERGY CONVERSION AND MANAGEMENT
WoS CC Cited Count: 5
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Abstract :

In order to develop clean and efficient energy conversion technology, a novel combined cooling, heating and power (CCHP) system using biomass as fuel is proposed in this work. The proposed CCHP system consists of biomass gasification unit, solid oxide fuel cell (SOFC), engine power generation unit and absorption refrigeration unit. Thermodynamic model of the CCHP system is developed for the parametric and exergy analyses to evaluate the performance. The parametric analysis shows that increasing the steam to biomass ratio or the SOFC fuel utilization factor helps to improve the electrical efficiency, while the increase of air equivalent ratio has a negative effect. The exergy analysis shows that the two units of biomass gasification and engine power generation have the largest exergy destruction ratio, which is 46.9% and 16.8% under the biomass flux of 500 kg.h- 1. This is because these two units involve in high-temperature thermochemical reaction process, resulting in relatively large exergy destruction. Besides, the tradeoff between maximum exergy efficiency, CCHP efficiency and minimum total annual cost is conducted by multi-objective optimization. Through optimization, the system could reach the high CCHP efficiency of 75% and net electrical efficiency of 52%, as well as the low total annual cost of 410 k$ simultaneously. This work could provide the basic design idea, and high-efficiency and low-cost operation strategy for the practical application of the proposed novel biomass-fueled CCHP poly-generation system.

Keyword :

SOFC hybrid system Thermodynamic analysis Multi-objective optimization Biomass energy

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GB/T 7714 Zhu, Pengfei , Wu, Zhen , Guo, Leilei et al. Achieving high-efficiency conversion and poly-generation of cooling, heating, and power based on biomass-fueled SOFC hybrid system: Performance assessment and multi-objective optimization [J]. | ENERGY CONVERSION AND MANAGEMENT , 2021 , 240 .
MLA Zhu, Pengfei et al. "Achieving high-efficiency conversion and poly-generation of cooling, heating, and power based on biomass-fueled SOFC hybrid system: Performance assessment and multi-objective optimization" . | ENERGY CONVERSION AND MANAGEMENT 240 (2021) .
APA Zhu, Pengfei , Wu, Zhen , Guo, Leilei , Yao, Jing , Dai, Min , Ren, Jianwei et al. Achieving high-efficiency conversion and poly-generation of cooling, heating, and power based on biomass-fueled SOFC hybrid system: Performance assessment and multi-objective optimization . | ENERGY CONVERSION AND MANAGEMENT , 2021 , 240 .
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