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CAPACITY OPTIMIZATION OF ADVANCED ENERGY STORAGE TECHNOLOGIES FOR PEAK SHAVING AND FREQUENCY REGULATION BASED ON ECONOMIC AND CARBON-MITIGATION CO-BENEFIT 37

CAPACITY OPTIMIZATION OF ADVANCED ENERGY STORAGE TECHNOLOGIE...

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37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2024

作者： Nie, Lu Li, Yanxin Gan, You Han, Xiaoqu Wang, Tong Yan, Junjie State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an China Huadian Electric Power Research Institute Co. Ltd. Beijing China

ISBN: (纸本)9798331307660

With the rapid scale-up in popularity of renewable energy sources, the new power system is suffering from enhanced *** order to improve flexibility of new power system and mitigate carbon emission, the integration of thermal power plants with energy storage technologies (ESTs) has gradually become a promising *** a key support for the development of new power system, it is of great significance to investigate the capacity optimization of advanced ***, there was a lack of study related to the capacity optimization of ESTs and the combination revenue patterns of ESTs were seldom *** the present work, a capacity optimization model was established for ESTs operating in combination with thermal power plants on the generating side, including lithium iron phosphate battery (LIPB), vanadium redox flow battery (VRFB), compressed air energy storage (CAES), supercapacitors (SC), and flywheel (FE) with the goal of maximizing the ***, VRFB, and CAES energy storage systems were investigated in the peak shaving (PS) *** co-benefit of ESTs was significant, 30.7-43.2 $/MWh, internal rate of return (IRR) was 12%-20%, and payback period (PP) was 6-11 years when the ratio of ESTs allocation (EAR) for thermal power plants was 2.50%-5.52%.LIPB, VRFB, CAES, SC, and FE were investigated in the frequency regulation (FR) *** co-benefit of ESTs was 51.9-329.3 $/MWh, IRR was 20%-35%, and PP was 3-7 years when the EAR was 0.24%-5.65%.The contribution of carbon mitigation benefit to co-benefit for different ESTs varied substantially, ranging from 6.46% to 82.75%.The ESTs not only offered ancillary service, but also other services when it operated as an independent shared energy storage.A new combination revenue pattern was proposed, under which revenue increased by 35%-55% compared to that of existing *** analysis was performed, in which the cost of energy storage, carbon tax, peak-valley spread, and comprehensi

关键词： flow batteries

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Investigation on the Parallel Computing Technique Using on the Numerical Simulation of Carbon Free Fuel 4

Investigation on the Parallel Computing Technique Using on t...

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4th International Conference on Information Science, Parallel and Distributed Systems, ISPDS 2023

作者： Wang, Weibin Wei, Xutao Xi'an Fanyi University Department of Computer Science Xi'an China Xi'an Jiaotong University State Key Laboratory of Multiphase Flow in Power Engineering Xi'an China

ISBN: (纸本)9798350337181

The numerical simulation of the turbulent combustion is identified as one of the most promising methods on the designs of the combustion devices, for example: the internal combustion engine and gas turbine. This mainly depends on the development of parallel computing technique. However, the computational efficiency for different cases on different compute nodes and number of cores still needs to be studied. On the other hand, due to the requirements from the aim of peaking carbon dioxide emissions before 2030 and achieving carbon neutrality before 2060, modern energy system is requesting low carbon or carbon free fuels, such as ammonia (NH3). Therefore, the simulations of ammonia/air flame were performed in present investigation. The comparison between simulation cases on different compute nodes and number of cores illustrates that different cases requires different number of cores to achieve the best computational efficiency. The computational efficiency of each compute nodes are dissimilar, which can decrease the efficiency. Meanwhile, the methods in present study can predict the ammonia/air flames. The initial condition of velocity fluctuation is necessary for simulating turbulent flame. The wrinkles of the flames can be well predicted by the velocity fluctuation initial boundary condition. © 2023 IEEE.

关键词： Computational efficiency

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Proposal design and thermodynamic analysis on a novel coal-based power generation system integrated with CO2 capture 3

Proposal design and thermodynamic analysis on a novel coal-b...

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3rd International Conference on Electrical engineering and Mechatronics Technology, ICEEMT 2023

作者： Gao, Guobin Mu, Ruiqi Yang, Yali Yan, Lei Gao, Jun Liu, Ming Guoneng Jinjie Energy Co. Ltd Yulin China Xi'an Jiaotong University State Key Laboratory of Multiphase Flow in Power Engineering Xi'an China

ISBN: (纸本)9798350303698

To enhance the energy efficiency and decrease the carbon emissions, a novel coal-based power generation system integrated with CO2 capture is proposed in this study. The S-CO2 cycle is integrated to recover the waster heat of system effectively. The heat transfer processes are well matched, and the irreversibility of heat exchangers in the system is reduced by splitting working medium appropriately. The system simulation and thermodynamic analysis models are developed. The energy and exergy efficiency of system are 51.32% and 50.07%, respectively. The system efficiency increases with the increase of the coal water slurry concentration (CWSC) and the decrease of the gasification temperature. When the CWSC is 35% and gasification temperature is 500 °C, the exergy efficiency of system reaches 51.74% and 50.59%, respectively. © 2023 IEEE.

关键词： Carbon dioxide

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Performance of cone meter for measuring cryogenic fluid considering cavitation

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International Journal of Fluid Machinery and Systems 2019年第1期12卷 12-21页

作者： He, Denghui Chang, Zhuang Bai, Bofeng Chen, Senlin Guo, Pengcheng State Key Laboratory of Eco-hydraulic in Northwest Arid Region Xi’an University of Technology NO.5 South Jinhua Road Xi’an710048 China State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University No.28 Xianning West Road Xi’an710049 China

The performance of the cone meter when measuring the cryogenic fluid was investigated by numerical simulation. The results show that the discharge coefficient and pressure loss coefficient of the cone meter are almost constant when the Reynolds number in the "stable region". The cryogenic fluids, especially the liquid hydrogen, have wider stable Reynolds number ranges than the water. There is little effect of cavitation on the discharge coefficient and pressure loss coefficient at the initial stage of cavitation. Thus the effect of slight cavitation on the measurement error of the flow rate is small, whose relative error is less than ±0.5% in present cases. This study opens a new avenue for measuring the flow rate of the cryogenic fluid. © 2019, Turbomachinery Society of Japan. All rights reserved.

关键词： Cavitation

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Optical Analysis of Fresnel lens for concentrating PV system

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AIP Conference Proceedings 2010年第1期1207卷 244-251页

作者： F. Q. Cui Y. L. He R. J. Xu Y. B. Tao aState Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University China

Concentrating PV systems usually use Fresnel lens as radiation concentrator. In this paper, in order to study the concentrating performance of the Fresnel lens, modular Fresnel lens mode was developed and its optical performance was analyzed by the ray tracing method. The imaging characteristic of Fresnel was studied and the optimal imaging location and the size of dispersion spot with different inlet angle were figured out. Flux distribution of the different imaging plane were also examined and compared. The results show that the dispersion spot deviates from the focus and the size of the dispersion spot is enlarged as the incidence angle increase, especially at the high geometric concentration ratio. Then in order to solve the problem, a flat light pipe was applied to reflect sun light onto the absorber plane. The simulation results show that with the new design, sun lights with large inlet angle could also be casted on the absorber.

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Changing Conditions and Thermodynamic Transient Characterization of Therminol VP-1 Oil-Water Heat Exchanger

Changing Conditions and Thermodynamic Transient Characteriza...

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2024 Boao New power System International Forum - power System and New Energy Technology Innovation Forum, NPSIF 2024

作者： Dong, Shuai Zheng, An Wang, Peng Wang, Chaoyang Huaneng Yimin Coal-Power Co. Ltd. Hulunbuir China Xi'an Jiaotong University State Key Laboratory of Multiphase Flow in Power Engineering Xi'an710049 China

ISBN: (纸本)9798331504557

In this paper, the exergy efficiency of high-pressure heater feedwater in a coal-fired power generation thermal system heated with Therminol VP-1 as the thermal fluid is investigated, and the transient characteristics of the heat exchanger are analyzed after changes in heat transfer oil parameters. The results show that the exergy efficiency of Therminol VP-1 for heating feedwater tends to decrease as the unit load decreases. The exergy efficiency for heating high pressure heater feedwater was 80% to 90%, with a maximum of 90.3%. The time required to reach the new steady state after perturbation of the boundary parameters of the oil-water heat exchanger increased with the load rate, with a minimum of 200 s and a maximum of 500 s in the study range. the new steady state was reached more quickly with increasing load than with decreasing load. © 2024 IEEE.

关键词： Exergy

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An experimental study on flow characteristics of homogeneous and stratified debris beds 16

An experimental study on flow characteristics of homogeneous...

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16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015

作者： Li, Liangxing Zou, Xumao Lou, Jiaojiao Li, Huixiong Lei, Xianliang State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xian-ning West Road 28# Xi'an city710049 China

ISBN: (纸本)9781510811843

This paper is concerned with reducing uncertainty in quantification of debris bed coolability in a severe accident of light water reactors (LWRs). The experimental results on the flow characteristics of particulate homogeneous and stratified beds are reported here and the objective is to get an idea of how the particles bed characteristics (such as the stratified information and its hierarchical arrangement) affects its flow resistance which is crucially important to the debris bed coolability analysis. Three type beds are packed in a cylindrical test section with the inner diameter of 120 mm and the height of 600 mm. Type-1 bed is homogeneous bed packed with single size spheres. Type-2 bed is also a homogeneous bed with uniformly mixing by two sizes of spheres. Type-3 bed is the axially stratified bed which is composed of two sizes of glass spheres same as that in the Type-2 bed. Both single and two phase flow tests are carried out, the pressure gradients and its flow characteristics are measured and recorded during the tests. The results show that for gas-water co-current flow through a homogeneous bed, the predictions of Reed's model are more comparable with the measured pressure drops. For a bed packed with uniform mixture of particles, the measured pressure gradients are close to the predictions of Ergun equation with area mean diameter at low flowrate (e.g. Rep © Copyright (2015) by American Nuclcar Society All rights reserved.

关键词： Pressure drop

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Numerical simulation of complex membrane characteristics of elastic capsules

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Kung Cheng Je Wu Li Hsueh Pao/Journal of engineering Thermophysics 2016年第2期37卷 337-341页

作者： Luo, Zheng-Yuan Bai, Bo-Feng State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China

Dynamics of elastic capsules (elastic membrane enclosing viscous fluid) under flow, which is determined by membrane mechanical characteristics, significantly influence mass transfer across the capsule membrane. Based on front tracking method, a three-dimensional model with considering membrane elasticity and bending resistance was developed to study the effect of bending resistance on the capsule deformation and membrane tensions. It is found that as the bending resistance increases, both the capsule deformation and membrane tensions decrease. Besides, the inclusion of bending resistance inhibits the formation of membrane buckles, thus enhances the membrane stability of capsules. © 2016, Science Press. All right reserved.

关键词： Membranes

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Research progress concerning turbulent drag reduction of surfactant solution

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Huagong Jinzhan/Chemical Industry and engineering Progress 2016年第6期35卷 1660-1675页

作者： Wei, Jinjia Huang, Chonghai Xu, Na State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'anShaanxi710049 China

In turbulent flow drag reduction applications, surfactant additive is more applicable than polymer for the flow with high shear or in the closed circulation system due to its reversible mechanical degradation advantage. However, there is not enough understanding of the complicated rheology and drag-reduction mechanism of surfactant solution, limiting its practical application in the drag reduction field. This review introduces the research progress of surfactant drag reduction conducted by the authors in recent years on microstructure, complicated rheology characteristics, turbulent structure, as well as their relations with drag reduction and heat transfer, and analyzes the combined drag reduction effect of surfactant additives in the flow and microgroove fabricated on the wall. The stretch devices can significantly improve the heat transfer performance of surfactant drag-reducing flow with a lower pressure loss penalty. To the shortages of present surfactant drag reduction research, several suggestions are given for the future study. The first is to develop environmentally friendly and effective surfactant, the second is optimal design and layout of heat transfer enhancement device for drag-reducing flow, the third is the study on synergetic effect of drag reduction by combing surfactant drag reduction and other drag-reducing ways, and the final one is practical industrial application research on the scale-up, anticorrosion and persistence effect of surfactant drag reduction. © 2016, Chemical Industry Press. All right reserved.

关键词： Heat transfer

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Numerical simulation on single Taylor bubble rising in LBE using moving particle method

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AIP Conference Proceedings 2013年第1期1547卷 700-710页

作者： Xin Li Wen X. Tian Rong H. Chen Guang H. Su Sui Z. Qiu State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University China

An improved meshless numerical method (MPS-MAFL) is utilized to simulate single Taylor bubble rising in liquid LBE to study its hydrodynamic characteristics. The computational region is a circular tube in which the liquid is described using discretized particles by un-uniform grid scheme. The gas-liquid interface was approximately treated as a free surface boundary and nonslip conditions are applied on tube wall. Several simulation results and corresponding analysis including Taylor bubble propagation procedure, pressure distribution, velocity profile around bubble nose and in the wake region as well as in the falling film are presented. Some experimental results and CFD numerical simulations from other previous researchers are compared with the present study as validation. The simulation results agree well with both theoretical analysis and experimental results, which demonstrate the reasonable selection of model as well as the accuracy and reliability of moving particle method.

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