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Xiaodai Xue
State Key Lab of Control and Simulation of Power System and Generation Equipments, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China

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Journal article
Published: 16 March 2021 in Energy Conversion and Management
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Factories in China are faced with peak-valley electricity prices and carbon reduction policies nowadays. As the adiabatic compressed air energy storage has a potential to store electricity and provide combined cooling, heating and power, in this paper, a cogeneration system based on it is first proposed to meet the comprehensive energy demands of a latex factory. A new assessment method based on daily energy cost savings is also proposed to evaluate its economic performance. Four novel energy supply strategies based on the cogeneration system and two contrast strategies were analyzed and compared. Results show the energy efficiency of the cogeneration system ranged from 89% to 95%. Besides, energy efficiency and exergy efficiency responded oppositely to the heat-to-electric ratio. In addition, the daily energy costs of the novel strategies were significantly lower than those of the contrast ones. Moreover, the air storage pressure affected the economy the most. Given the ceiling storage pressure of 10 MPa, the optimum floor storage pressure for the air storage was 4.5 MPa. Furthermore, when the cogeneration system provided electricity and dry steam only during the peak load period, its assumed internal return rate reached as high as 10.37%. Therefore, this energy supply strategy is suggested as the most promising choice for the latex factory.

ACS Style

Xuelin Zhang; Tong Zhang; Linrui Ma; Jun Wen; Guohua Wang; Bin Wang; Shengwei Mei; Linghui Gong; Xiaodai Xue. Cogeneration compressed air energy storage system for industrial steam supply. Energy Conversion and Management 2021, 235, 114000 .

AMA Style

Xuelin Zhang, Tong Zhang, Linrui Ma, Jun Wen, Guohua Wang, Bin Wang, Shengwei Mei, Linghui Gong, Xiaodai Xue. Cogeneration compressed air energy storage system for industrial steam supply. Energy Conversion and Management. 2021; 235 ():114000.

Chicago/Turabian Style

Xuelin Zhang; Tong Zhang; Linrui Ma; Jun Wen; Guohua Wang; Bin Wang; Shengwei Mei; Linghui Gong; Xiaodai Xue. 2021. "Cogeneration compressed air energy storage system for industrial steam supply." Energy Conversion and Management 235, no. : 114000.

Journal article
Published: 29 December 2020 in Solar Energy
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In a commercial parabolic trough solar power plant (PTSPP), the solar field (SF) is large-scaled and consists of hundreds of parabolic trough collector (PTC) loops. The PTSPP performance is determined by an appropriate operation strategy of the SF, which is implemented by adjusting the outlet temperature, the flowrate, and the flow distribution through the valves and pump to make the PTSPP output cost-effective. Majority of the published literature study the behavior of the SF with an assumption that all the PTC loops have uniform perfect performance. Due to the lack of appropriate model and algorithm, although operating with nonuniform and degraded PTCs is inevitable for a realistic SF, there is scarcely any literature studies how to develop an optimal operation strategy under this situation. The present paper aims at solving this problem by establishing a PTSPP model and developing an improved operation strategy (IOS). The PTSPP model consists of an improved thermal hydraulic model of the SF and a simplified but effective model of the power block, and the IOS combines the features of both global and distributed operation strategy. Based on the model and the IOS, the mechanism of optimization is illustrated in a uniform case, and then according to the comparison and analysis, the most appropriate strategy for the nonuniform case is determined among three representative strategies. Compared with the traditional operation strategy, the chosen strategy can improve the net electric generation by 3.4% with the low computational cost and good engineering feasibility.

ACS Style

Linrui Ma; Tong Zhang; Xuelin Zhang; Bin Wang; Shengwei Mei; Zhifeng Wang; Xiaodai Xue. Optimization of parabolic trough solar power plant operations with nonuniform and degraded collectors. Solar Energy 2020, 214, 551 -564.

AMA Style

Linrui Ma, Tong Zhang, Xuelin Zhang, Bin Wang, Shengwei Mei, Zhifeng Wang, Xiaodai Xue. Optimization of parabolic trough solar power plant operations with nonuniform and degraded collectors. Solar Energy. 2020; 214 ():551-564.

Chicago/Turabian Style

Linrui Ma; Tong Zhang; Xuelin Zhang; Bin Wang; Shengwei Mei; Zhifeng Wang; Xiaodai Xue. 2020. "Optimization of parabolic trough solar power plant operations with nonuniform and degraded collectors." Solar Energy 214, no. : 551-564.

Journal article
Published: 06 December 2020 in Energy
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Advanced adiabatic compressed air energy storage (AA-CAES) is a scalable storage technology with a long lifespan, fast response and low environmental impact, and is suitable for grid-level applications. In power systems with high-penetration renewable generation, AA-CAES is expected to play an active role in flexible regulation. This paper proposes a state-space set-point control model of AA-CAES for the application in the power tracking mode considering off-design characteristics. The part-load features of the multi-stage turbine and heat exchanger are captured by simplified models, and then tailored for improving computational efficiency in the applications with a timescale of one minute. The set-point control (power tracking) of AA-CAES entails the coordination of turbine inlet pressure, air mass flow rate and heat transfer fluid (HTF) mass flow rate, while ensuring the secure pressure at the throttle valve linking the air storage tank and the expansion train. The set-point control problem is cast to a differential-algebraic equation (DAE) constrained optimization problem, and is reformulated as a nonlinear program via the simultaneous collocation method. Case studies validate the accuracy and applicability of the proposed AA-CAES model for power tracking under off-design generating conditions.

ACS Style

Jiayu Bai; Feng Liu; Xiaodai Xue; Wei Wei; Laijun Chen; Guohua Wang; Shengwei Mei. Modelling and control of advanced adiabatic compressed air energy storage under power tracking mode considering off-design generating conditions. Energy 2020, 218, 119525 .

AMA Style

Jiayu Bai, Feng Liu, Xiaodai Xue, Wei Wei, Laijun Chen, Guohua Wang, Shengwei Mei. Modelling and control of advanced adiabatic compressed air energy storage under power tracking mode considering off-design generating conditions. Energy. 2020; 218 ():119525.

Chicago/Turabian Style

Jiayu Bai; Feng Liu; Xiaodai Xue; Wei Wei; Laijun Chen; Guohua Wang; Shengwei Mei. 2020. "Modelling and control of advanced adiabatic compressed air energy storage under power tracking mode considering off-design generating conditions." Energy 218, no. : 119525.

Research article
Published: 20 October 2020 in Frontiers in Energy
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Hot dry rock is a new type of geothermal resource which has a promising application prospect in China. This paper conducted a comparative research on performance evaluation of two eligible bottoming cycles for a hot dry rock power plant in the Gonghe Basin. Based on the given heat production conditions, a Kalina cycle and three organic Rankine cycles were tested respectively with different ammonia-water mixtures of seven ammonia mass fractions and nine eco-friendly working fluids. The results show that the optimal ammonia mass fraction is 82% for the proposed bottoming Kalina cycle in view of maximum net power output. Thermodynamic analysis suggests that wet fluids should be supercritical while dry fluids should be saturated at the inlet of turbine, respectively. The maximum net power output of the organic Rankine cycle with dry fluids expanding from saturated state is higher than that of the other organic Rankine cycle combinations, and is far higher than the maximum net power output in all tested Kalina cycle cases. Under the given heat production conditions of hot dry rock resource in the Gonghe Basin, the saturated organic Rankine cycle with the dry fluid butane as working fluid generates the largest amount of net power.

ACS Style

Xuelin Zhang; Tong Zhang; Xiaodai Xue; Yang Si; Shengwei Mei. A comparative thermodynamic analysis of Kalina and organic Rankine cycles for hot dry rock: a prospect study in the Gonghe Basin. Frontiers in Energy 2020, 14, 889 -900.

AMA Style

Xuelin Zhang, Tong Zhang, Xiaodai Xue, Yang Si, Shengwei Mei. A comparative thermodynamic analysis of Kalina and organic Rankine cycles for hot dry rock: a prospect study in the Gonghe Basin. Frontiers in Energy. 2020; 14 (4):889-900.

Chicago/Turabian Style

Xuelin Zhang; Tong Zhang; Xiaodai Xue; Yang Si; Shengwei Mei. 2020. "A comparative thermodynamic analysis of Kalina and organic Rankine cycles for hot dry rock: a prospect study in the Gonghe Basin." Frontiers in Energy 14, no. 4: 889-900.

Journal article
Published: 14 October 2019 in Applied Thermal Engineering
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As a promising solution for large-scale energy storage, liquid air energy storage (LAES) has unique advantages of high energy storage density and no geographical constraint. In baseline LAES, the compression heat is surplus because of the low liquefaction ratio, which significantly influences its round-trip efficiency (RTE). In this paper, hybrid LAES systems based on the cascaded storage and effective utilization of compression heat is proposed and analyzed. In order to improve the storage temperature, cascaded-storage of compression heat is proposed. Meanwhile, the organic Rankine cycle (ORC) and Kalina cycle (KC) are considered to utilize the surplus compression heat to generate additional electricity. Based on the same conditions, the performances of the subcritical ORC using dry fluids, supercritical ORC using wet fluids, and KC are calculated and compared. It is found that the cascaded storage of compression heat can significantly increase the storage temperature and further improve the RTE of the system. Moreover, the RTE of the LAES system is increased by 10.9–19.5% owing to the additional power generation. The subcritical ORC using dry fluids is found to be more suitable in utilizing the surplus compression heat for its simple configuration and excellent performance.

ACS Style

Tong Zhang; Xue-Lin Zhang; Ya-Ling He; Xiao-Dai Xue; Sheng-Wei Mei. Thermodynamic analysis of hybrid liquid air energy storage systems based on cascaded storage and effective utilization of compression heat. Applied Thermal Engineering 2019, 164, 114526 .

AMA Style

Tong Zhang, Xue-Lin Zhang, Ya-Ling He, Xiao-Dai Xue, Sheng-Wei Mei. Thermodynamic analysis of hybrid liquid air energy storage systems based on cascaded storage and effective utilization of compression heat. Applied Thermal Engineering. 2019; 164 ():114526.

Chicago/Turabian Style

Tong Zhang; Xue-Lin Zhang; Ya-Ling He; Xiao-Dai Xue; Sheng-Wei Mei. 2019. "Thermodynamic analysis of hybrid liquid air energy storage systems based on cascaded storage and effective utilization of compression heat." Applied Thermal Engineering 164, no. : 114526.

Journal article
Published: 26 February 2019 in Entropy
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Liquid air energy storage (LAES) is a promising energy storage technology in consuming renewable energy and electricity grid management. In the baseline LAES (B-LAES), the compression heat is only utilized in heating the inlet air of turbines, and a large amount of compression heat is surplus, leading to a low round-trip efficiency (RTE). In this paper, an integrated energy system based on LAES and the Kalina cycle (KC), called KC-LAES, is proposed and analyzed. In the proposed system, the surplus compression heat is utilized to drive a KC system to generate additional electricity in the discharging process. An energetic model is developed to evaluate the performance of the KC and the KC-LAES. In the analysis of the KC subsystem, the calculation results show that the evaporating temperature has less influence on the performance of the KC-LAES system than the B-LAES system, and the optimal working fluid concentration and operating pressure are 85% and 12 MPa, respectively. For the KC-LAES, the calculation results indicate that the introduction of the KC notably improves the compression heat utilization ratio of the LAES, thereby improving the RTE. With a liquefaction pressure value of eight MPa and an expansion pressure value of four MPa, the RTE of the KC-LAES is 57.18%, while that of the B-LAES is 52.16%.

ACS Style

Tong Zhang; Xuelin Zhang; Xiaodai Xue; Guohua Wang; Shengwei Mei. Thermodynamic Analysis of a Hybrid Power System Combining Kalina Cycle with Liquid Air Energy Storage. Entropy 2019, 21, 220 .

AMA Style

Tong Zhang, Xuelin Zhang, Xiaodai Xue, Guohua Wang, Shengwei Mei. Thermodynamic Analysis of a Hybrid Power System Combining Kalina Cycle with Liquid Air Energy Storage. Entropy. 2019; 21 (3):220.

Chicago/Turabian Style

Tong Zhang; Xuelin Zhang; Xiaodai Xue; Guohua Wang; Shengwei Mei. 2019. "Thermodynamic Analysis of a Hybrid Power System Combining Kalina Cycle with Liquid Air Energy Storage." Entropy 21, no. 3: 220.

Journal article
Published: 01 July 2018 in Energy
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Liquid air energy storage (LAES) is a promising solution for electricity energy storage and grid load shifting. The storage and application of cold energy can significantly affect the performance of LAES systems. A stable and sufficient source of cold energy in the liquefaction process is the key factor for the stable and efficient operation of an LAES system. Hence, a novel hybrid LAES system combined with organic Rankine cycle (ORC) systems based on the utilization of liquefied natural gas (LNG) cold energy is proposed in this paper. In the charging process, the LNG helps cool the compressed air, and the cold energy of the liquid air and excess compression heat are utilized in a two-stage ORC system to generate additional electricity during the discharging process. A mathematical model comprising energy and exergy analyses was developed to analyze the performance of the proposed system and the influence of key parameters. Compared to standalone LAES systems, the cold energy storage system is extremely simplified in the proposed system, and higher electricity storage efficiency and density are obtained. Therefore, the proposed system has a promising prospect in LNG terminals owing to its stability and ease of implementation.

ACS Style

Tong Zhang; Laijun Chen; Xuelin Zhang; Shengwei Mei; Xiaodai Xue; Yuan Zhou. Thermodynamic analysis of a novel hybrid liquid air energy storage system based on the utilization of LNG cold energy. Energy 2018, 155, 641 -650.

AMA Style

Tong Zhang, Laijun Chen, Xuelin Zhang, Shengwei Mei, Xiaodai Xue, Yuan Zhou. Thermodynamic analysis of a novel hybrid liquid air energy storage system based on the utilization of LNG cold energy. Energy. 2018; 155 ():641-650.

Chicago/Turabian Style

Tong Zhang; Laijun Chen; Xuelin Zhang; Shengwei Mei; Xiaodai Xue; Yuan Zhou. 2018. "Thermodynamic analysis of a novel hybrid liquid air energy storage system based on the utilization of LNG cold energy." Energy 155, no. : 641-650.

Journal article
Published: 25 December 2017 in CSEE Journal of Power and Energy Systems
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ACS Style

Shengwei Mei; Tsinghua University; Rui Li; Xiaodai Xue; Ying Chen; Qiang Lu; Xiaotao Chen; Carsten D. Ahrens; Ruomei Li; Laijun Chen; Qinghai University; University of Applied Sciences; Csee. Paving the way to smart micro energy grid: concepts, design principles, and engineering practices. CSEE Journal of Power and Energy Systems 2017, 3, 440 -449.

AMA Style

Shengwei Mei, Tsinghua University, Rui Li, Xiaodai Xue, Ying Chen, Qiang Lu, Xiaotao Chen, Carsten D. Ahrens, Ruomei Li, Laijun Chen, Qinghai University, University of Applied Sciences, Csee. Paving the way to smart micro energy grid: concepts, design principles, and engineering practices. CSEE Journal of Power and Energy Systems. 2017; 3 (4):440-449.

Chicago/Turabian Style

Shengwei Mei; Tsinghua University; Rui Li; Xiaodai Xue; Ying Chen; Qiang Lu; Xiaotao Chen; Carsten D. Ahrens; Ruomei Li; Laijun Chen; Qinghai University; University of Applied Sciences; Csee. 2017. "Paving the way to smart micro energy grid: concepts, design principles, and engineering practices." CSEE Journal of Power and Energy Systems 3, no. 4: 440-449.

Journal article
Published: 15 October 2016 in Journal of Modern Power Systems and Clean Energy
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As an effective approach of implementing power load shifting, fostering the accommodation of renewable energy, such as the wind and solar generation, energy storage technique is playing an important role in the smart grid and energy internet. Compressed air energy storage (CAES) is a promising energy storage technology due to its cleanness, high efficiency, low cost, and long service life. This paper surveys state-of-the-art technologies of CAES, and makes endeavors to demonstrate the fundamental principles, classifications and operation modes of CAES. Critical subsystems of CAES are elaborated exhaustively. The application prospects and further research directions are summarized to promote the popularization of CAES in smart grid and energy internet.

ACS Style

Laijun Chen; Tianwen Zheng; Shengwei Mei; Xiaodai Xue; Binhui Liu; Qiang Lu. Review and prospect of compressed air energy storage system. Journal of Modern Power Systems and Clean Energy 2016, 4, 529 -541.

AMA Style

Laijun Chen, Tianwen Zheng, Shengwei Mei, Xiaodai Xue, Binhui Liu, Qiang Lu. Review and prospect of compressed air energy storage system. Journal of Modern Power Systems and Clean Energy. 2016; 4 (4):529-541.

Chicago/Turabian Style

Laijun Chen; Tianwen Zheng; Shengwei Mei; Xiaodai Xue; Binhui Liu; Qiang Lu. 2016. "Review and prospect of compressed air energy storage system." Journal of Modern Power Systems and Clean Energy 4, no. 4: 529-541.

Journal article
Published: 31 March 2013 in Applied Thermal Engineering
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The impedance match is important for the efficiency and available acoustic power of thermocompressor (TCP). The filling pressure, hot end temperature, reservoir volume and opening of orifice were changed to test the optimum load impedance for the maximum acoustic power by RC (Resistor and Capacitor) load method. To make use of the acoustic power efficiently, a pulse tube refrigerator (PTR) was designed based on this impedance to match the TCP and relative coupling experiments were conducted for the first time. The refrigerating performance of PTR was observed and the lowest no-load temperature of 70.4 K was obtained at its optimum working frequency 5.6 Hz. Also, the performance characteristics and total impedances of three different PTRs were compared to verify the rationality of the impedance matching method in this paper. The calculation results agree well with the substantial experiments and further optimization methods were also proposed.

ACS Style

Wei Ji; Xiaodai Xue; Junjie Wang; Yuan Zhou; Liubiao Chen; Wenxiu Zhu. Coupling study of a novel thermocompressor driven pulse tube refrigerator. Applied Thermal Engineering 2013, 51, 630 -634.

AMA Style

Wei Ji, Xiaodai Xue, Junjie Wang, Yuan Zhou, Liubiao Chen, Wenxiu Zhu. Coupling study of a novel thermocompressor driven pulse tube refrigerator. Applied Thermal Engineering. 2013; 51 (1-2):630-634.

Chicago/Turabian Style

Wei Ji; Xiaodai Xue; Junjie Wang; Yuan Zhou; Liubiao Chen; Wenxiu Zhu. 2013. "Coupling study of a novel thermocompressor driven pulse tube refrigerator." Applied Thermal Engineering 51, no. 1-2: 630-634.

Journal article
Published: 22 October 2010 in Cryogenics
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DC gas flow in pulse tube cryocooler (PTC) is a crucial problem both in theory and application which considerably affects the refrigeration performance. We have experimentally discovered and verified the third type of DC gas flow in PTC which is formed due to hydrodynamic and thermodynamic asymmetry of the regenerator and other flow channels. This new type of DC gas flow is possible to be identified in other regenerative engines or refrigerators. We also introduced a highlighting method which can suppress this kind of DC gas flow effectively in most cases, with the best result of 30 K temperature drop at the cold end of the PTC.

ACS Style

Chao Gu; Yuan Zhou; Junjie Wang; Huikun Cai; Xiaodai Xue. Experimental discovery and verification of the third type of DC gas flow in pulse tube cryocooler. Cryogenics 2010, 51, 157 -160.

AMA Style

Chao Gu, Yuan Zhou, Junjie Wang, Huikun Cai, Xiaodai Xue. Experimental discovery and verification of the third type of DC gas flow in pulse tube cryocooler. Cryogenics. 2010; 51 (4):157-160.

Chicago/Turabian Style

Chao Gu; Yuan Zhou; Junjie Wang; Huikun Cai; Xiaodai Xue. 2010. "Experimental discovery and verification of the third type of DC gas flow in pulse tube cryocooler." Cryogenics 51, no. 4: 157-160.