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Thermo-economic analysis of a direct supercritical CO electric power generation system using geothermalheat

《能源前沿（英文）》 2022年 第16卷 第2期   页码 246-262 doi: 10.1007/s11708-021-0749-9

摘要： A comprehensive thermo-economic model combining a geothermal heat mining system and a direct supercritical CO2 turbine expansion electric power generation system was proposed in this paper. Assisted by this integrated model, thermo-economic and optimization analyses for the key design parameters of the whole system including the geothermal well pattern and operational conditions were performed to obtain a minimal levelized cost of electricity (LCOE). Specifically, in geothermal heat extraction simulation, an integrated wellbore-reservoir system model (T2Well/ECO2N) was used to generate a database for creating a fast, predictive, and compatible geothermal heat mining model by employing a response surface methodology. A parametric study was conducted to demonstrate the impact of turbine discharge pressure, injection and production well distance, CO2 injection flowrate, CO2 injection temperature, and monitored production well bottom pressure on LCOE, system thermal efficiency, and capital cost. It was found that for a 100 MWe power plant, a minimal LCOE of $0.177/kWh was achieved for a 20-year steady operation without considering CO2 sequestration credit. In addition, when CO2 sequestration credit is $1.00/t, an LCOE breakeven point compared to a conventional geothermal power plant is achieved and a breakpoint for generating electric power generation at no cost was achieved for a sequestration credit of $2.05/t.

关键词： geothermal heat mining     supercritical CO2     power generation     thermo-economic analysis     optimization    

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A novel flow-resistor network model for characterizing enhanced geothermal system heat reservoir

Jian GUO, Wenjiong CAO, Yiwei WANG, Fangming JIANG

《能源前沿（英文）》 2019年 第13卷 第1期   页码 99-106 doi: 10.1007/s11708-018-0555-1

摘要： The fracture characteristics of a heat reservoir are of critical importance to enhanced geothermal systems, which can be investigated by theoretical modeling. This paper presents the development of a novel flow-resistor network model to describe the hydraulic processes in heat reservoirs. The fractures in the reservoir are simplified by using flow resistors and the typically complicated fracture network of the heat reservoir is converted into a flow-resistor network with a reasonably simple pattern. For heat reservoirs with various fracture configurations, the corresponding flow-resistor networks are identical in terms of framework though the networks may have different section numbers and the flow resistors may have different values. In this paper, numerous cases of different section numbers and resistor values are calculated and the results indicate that the total number of flow resistances between the injection and production wells is primarily determined by the number of fractures in the reservoir. It is also observed that a linear dependence of the total flow resistance on the number of fractures and the relation is obtained by the best fit of the calculation results. Besides, it performs a case study dealing with the Soultz enhanced geothermal system (EGS). In addition, the fracture numbers underneath specific well systems are derived. The results provide insight on the tortuosity of the flow path between different wells.

关键词： enhanced geothermal systems     flow-resistor network model     fracture characteristics     heat reservoir    

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深部矿产和地热资源共采战略研究

蔡美峰,多吉,陈湘生,毛景文,唐春安,刘志强,纪洪广,任奋华, 郭奇峰,李鹏

《中国工程科学》 2021年 第23卷 第6期   页码 43-51 doi: 10.15302/J-SSCAE-2021.06.006

摘要：

深部矿产和地热资源共采是实现深部采矿可持续发展的重要举措，也为深部高温岩层地热开采提供了全新技术手段。 本文分析了深部矿产和地热资源共采的重要价值，梳理了国内外地热资源的开发利用现状，总结了我国在深部矿产和地热资 源共采方面的基础研究进展；在剖析深部矿产和地热资源共采面临的技术与管理挑战的基础上，论证形成了实施综合开发利 用亟需的技术体系构成，涉及深部矿产资源与深部地热开发利用调查及前景研判、高温坚硬岩层地下巷道与硐室掘进及建造、 深部矿产资源开采系统和地热开发系统“共建 – 共存 – 共用”的关键理论与技术体系、深部高温岩层地热能交换和输送理论 与技术。研究提出了地质勘查、科技创新、扶持政策、顶层规划与科研示范基地等方面的发展建议，以期为我国矿业和地热 产业可持续、高质量发展提供参考。

关键词： 深部矿产     地热资源     矿–热共采     高温岩层     地热能交换和输送    

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A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction

Wenjiong CAO, Wenbo HUANG, Guoling WEI, Yunlong JIN, Fangming JIANG

《能源前沿（英文）》 2019年 第13卷 第3期   页码 439-449 doi: 10.1007/s11708-019-0612-4

摘要： Underground non-Darcy fluid flow has been observed and investigated for decades in the petroleum industry. It is deduced by analogy that the fluid flow in enhanced geothermal system (EGS) heat reservoirs may also be in the non-Darcy regime under some conditions. In this paper, a transient 3D model was presented, taking into consideration the non-Darcy fluid flow in EGS heat reservoirs, to simulate the EGS long-term heat extraction process. Then, the non-Darcy flow behavior in water- and supercritical CO (SCCO )-based EGSs was simulated and discussed. It is found that non-Darcy effects decrease the mass flow rate of the fluid injected and reduce the heat extraction rate of EGS as a flow resistance in addition to the Darcy resistance which is imposed to the seepage flow in EGS heat reservoirs. Compared with the water-EGS, the SCCO -EGS are more prone to experiencing much stronger non-Darcy flow due to the much larger mobility of the SCCO . The non-Darcy flow in SCCO - EGSs may thus greatly reduce their heat extraction performance. Further, a criterion was analyzed and proposed to judge the onset of the non-Darcy flow in EGS heat reservoirs. The fluid flow rate and the initial thermal state of the reservoir were taken and the characteristic Forchheimer number of an EGS was calculated. If the calculated Forchheimer number is larger than 0.2, the fluid flow in EGS heat reservoirs experiences non-negligible non-Darcy flow characteristic.

关键词： enhanced geothermal system     non-Darcy flow     heat extraction     Reynolds number     Forchheimer number    

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典型高温地热系统——羊八井热田基本特征

多吉

《中国工程科学》 2003年 第5卷 第1期   页码 42-47

摘要：

羊八井热田是属于陆陆碰撞板缘非火山型高温地热田。热田是由3个不同能的热储层构成，即浅层、深部第一和第二热储层，实质上它们属同一个水力系统，是一个完整的地热系统的不同部位。浅层热储由第四系松散沉积物及部分基岩风化壳构成，其埋深在地表以下180～280 m，热储温度130～173℃，水质类型为C1--HCO3--Na+型水，属深部热流体与冷水混合的产物，流体以液相为主。深部热储由变质杂岩体中的滑离断层系构造空间构成，属基岩裂隙型脉状或带状热储，其中深部第一热储埋深为950～1 350 m，最高温度259.6 ℃；深部第二热储位于1 850 m深，热储最高温度可达329.8 ℃，深部热流体水质类型均属C1--Na+ 型，气体组份中CO2占主导地位。

关键词： 高温地热     热储层     成因     羊八井     西藏    

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Strategic analysis of China’s geothermal energy industry

Hao GONG, Baicun WANG, Haijun LIANG, Zuoxian LUO, Yaofeng CAO

《工程管理前沿（英文）》 2021年 第8卷 第3期   页码 390-401 doi: 10.1007/s42524-020-0106-4

摘要： China is an early user of geothermal energy, and its direct use ranks first in the world. Recent national strategies and policies have enabled China’s geothermal energy industry to enter a new era with important development opportunities. This paper investigates the strengths, weaknesses, opportunities, and threats (SWOT) to China’s geothermal energy industry from political, economic, social, and technological (PEST) perspectives. SWOT–PEST analysis indicates that the resources, market, and technological foundation exist for the large-scale development of China’s geothermal energy industry. However, it experiences constraints, such as unclear resource distributions, incomplete development of government regulations, incomplete implementation of national policies, unclear authority between governmental administrative systems, and lack of uniform technical standards and codes. Therefore, future development strategies have been proposed to provide technical support and policy tools for geothermal energy development. The recommendations to ensure its healthy and sustainable development include improving resource exploration, rationalizing administration systems, enhancing policy guidance and financial support, and cultivating geothermal talent.

关键词： geothermal energy     strategic analysis     SWOT–PEST     policy     administration    

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Large-scale geo-energy development: Sustainability impacts

Li JIANG,Liandong ZHU,Erkki HILTUNEN

《能源前沿（英文）》 2019年 第13卷 第4期   页码 757-763 doi: 10.1007/s11708-017-0455-9

摘要： Geothermal energy is a renewable and alternative energy with the potential to replace fossil fuels and help mitigate global warming. However, the development of geothermal energy has environmental, economic and social-cultural consequences, which needs to be predicted beforehand and then mitigated. To guarantee a sustainable development, it is, therefore, essential to consider the relative potential impacts. From a sustainability point of view, in the present study, a comprehensive analysis of consequences of geothermal energy development is conducted, including environmental, economic and societal & cultural dimensions. The geothermal energy industry will prosper only if sustainable aspects can be integrally considered.

关键词： geothermal energy     sustainability     impact     development    

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金属矿床地下自动开采的前沿技术及其发展途径

李仲学,李翠平,刘双跃

《中国工程科学》 2007年 第9卷 第11期   页码 16-20

摘要：

通过总结和分析国外有关金属矿床地下无人开采或自动开采技术研究、开发、应用等方面的进展情况，对金属矿床地下自动开采关键前沿技术及其在我国的发展途径提出一些思考。

关键词： 金属矿床     自动采矿     无人采矿     无人矿山    

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Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

《能源前沿（英文）》 2017年 第11卷 第4期   页码 414-436 doi: 10.1007/s11708-017-0507-1

摘要： Absorption heat pump attracts increasing attention due to its advantages in low grade thermal energy utilization. It can be applied for waste heat reuse to save energy consumption, reduce environment pollution, and bring considerable economic benefit. In this paper, three important aspects for absorption heat pump for waste heat reuse are reviewed. In the first part, different absorption heat pump cycles are classified and introduced. Absorption heat pumps for heat amplification and absorption heat transformer for temperature upgrading are included. Both basic single effect cycles and advanced cycles for better performance are introduced. In the second part, different working pairs, including the water based working pairs, ammonia based working pairs, alcohol based working pairs, and halogenated hydrocarbon based working pairs, for absorption heat pump are classified based on the refrigerant. In the third part, the applications of the absorption heat pump and absorption heat transformer for waste heat reuse in different industries are introduced. Based on the reviews in the three aspects, essential summary and future perspective are presented at last.

关键词： absorption     heat pump     heat transformer     waste heat     working pair    

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挖掘变化知识的可拓数据挖掘研究

陈文伟

《中国工程科学》 2006年 第8卷 第11期   页码 70-73

摘要：

规范了可拓信息与可拓知识基本概念，即在信息和知识的概念上扩充了变化的信息和变化的知识。明确了可拓数据挖掘概念以及可拓推理新概念。证明了可拓数据挖掘两个定理和可拓推理公式。提出的从挖掘静态知识的数据挖掘扩展到挖掘变化知识的可拓数据挖掘，为数据挖掘开辟了新的研究方向，并通过实例进行了说明。

关键词： 可拓信息     可拓知识     可拓数据挖掘     可拓推理    

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论当前地下金属资源开发的科学技术前沿

于润沧

《中国工程科学》 2002年 第4卷 第9期   页码 8-11

摘要：

随着岩石力学的发展、计算机在矿业领域的广泛应用以及多学科交叉的促进，一向作为“技艺”的采矿学已开始进入科学领域。文章对地下金属资源开发的数控采矿环境、实现无废开采、海洋采矿、应对深井开采的岩爆威胁等科技前沿做了初步探讨，阐明其对采矿学科发展的重要意义。

关键词： 采矿     金属资源     数控采矿环境     无废开采    

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Technology Development and Engineering Practice for Protection and Utilization of Water Resources in Coal Mining

Da-zhao Gu

《工程管理前沿（英文）》 2016年 第3卷 第1期   页码 59-66 doi: 10.15302/J-FEM-2016010

摘要： Shanxi, Shaanxi, Inner Mongolia, Ningxia, and Gansu (hereafter generally referred as “the Western Area”) are major coal-producing areas in China due to rich coal resources and good mining conditions. However, the Western Area has a serious water shortage. The surface evaporation is huge and a great amount of mine water generated in coal mining is evaporated and lost after discharging to surface. In order to protect and utilize the water resources during large-scale coal mining in the Western Area, Shenhua Group has put forward a technological idea to store mine water in underground mined areas and successfully researched and developed the coal mine underground reservoir technology by solving the technical difficulties of water source prediction, reservoir site selection, reservoir capacity design, dam construction, safety guarantee, water quality control and so on through 20 years of exploration. Now Shenhua Group has successfully established a batch of reservoir in the Shendong Mining Area, obtaining great economic and social benefits. The technology is also extended to other western mining areas, providing an effective path for harmonic mining of coal and water resources in western China.

关键词： Western Mining Area     coal mining     water resources     coal mine underground reservoirs    

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Driving Factors of Green Mining in Coal Mining Enterprises in China

Lin-xiu Wang,Mu-xi Yu,Si-jia Wang

《工程管理前沿（英文）》 2015年 第2卷 第3期   页码 211-223 doi: 10.15302/J-FEM-2015043

摘要： This study constructs a Green Mining model based on identification and analysis of the four key driving factors of Green Mining in coal mining enterprises in China. Twelve research propositions are raised and empirically tested by using Structural Equation Model. The result shows that four key factors affect the intended implementation of Green Mining by improving a corporations efficiency and reputation. The diffusion of Green Mining technology has direct positive influence on the intended Green Mining implementation; Stakeholders’ green appeal has a positive influence on the decision makers’ attitude and values. The empirical study provides support for the government to establish a reasonable regulation and control mechanism to improve enterprises’ enthusiasm for Green Mining. Four Green Mining incentive policies are raised to regulate and motivate the coal mining enterprises to improve their environmental behaviors. The government can adopt piece(s) of them to change the enterprises’ roles from traditional passive to modern initiative.

关键词： Green Mining     driving factor     Structural Equation Model     empirical study    

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2019年度能源与矿业工程前沿

能源与矿业工程项目组

《全球工程前沿》 2019年 第3卷 第1期   页码 73-102

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2022年度能源与矿业工程前沿

能源与矿业工程项目组

《全球工程前沿》 2022年 第6卷 第1期   页码 92-123

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标题 作者 时间 类型 操作

Thermo-economic analysis of a direct supercritical CO electric power generation system using geothermalheat

期刊论文

A novel flow-resistor network model for characterizing enhanced geothermal system heat reservoir

Jian GUO, Wenjiong CAO, Yiwei WANG, Fangming JIANG

期刊论文

深部矿产和地热资源共采战略研究

蔡美峰,多吉,陈湘生,毛景文,唐春安,刘志强,纪洪广,任奋华, 郭奇峰,李鹏

期刊论文

A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction

Wenjiong CAO, Wenbo HUANG, Guoling WEI, Yunlong JIN, Fangming JIANG

期刊论文

典型高温地热系统——羊八井热田基本特征

多吉

期刊论文

Strategic analysis of China’s geothermal energy industry

Hao GONG, Baicun WANG, Haijun LIANG, Zuoxian LUO, Yaofeng CAO

期刊论文

Large-scale geo-energy development: Sustainability impacts

Li JIANG,Liandong ZHU,Erkki HILTUNEN

期刊论文

金属矿床地下自动开采的前沿技术及其发展途径

李仲学,李翠平,刘双跃

期刊论文

Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

期刊论文

挖掘变化知识的可拓数据挖掘研究

陈文伟

期刊论文

论当前地下金属资源开发的科学技术前沿

于润沧

期刊论文

Technology Development and Engineering Practice for Protection and Utilization of Water Resources in Coal Mining

Da-zhao Gu

期刊论文

Driving Factors of Green Mining in Coal Mining Enterprises in China

Lin-xiu Wang,Mu-xi Yu,Si-jia Wang

期刊论文

2019年度能源与矿业工程前沿

能源与矿业工程项目组

期刊论文

2022年度能源与矿业工程前沿

能源与矿业工程项目组

期刊论文