Thermodynamic analysis and multi-objective optimization of a novel power generation system driven by geothermal energy

Yu, Zeting; Su, Ruizhi; Feng, Chunyu

doi:10.1016/j.energy.2020.117381

Cited by 36 publications

(2 citation statements)

References 46 publications

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“…There are several ways of working of the geothermal energy within the daily life of a human being or in any sort of workplaces the geothermal energy has been implemented to get sheer amount of sustainability in the working process of a particular organization. First and initial way to use the geothermal energy sources is the dry steam which takes the stems from the breakage in the ground to remove the turbine in a direct way [7]. Also, flash plants intend to pull up the high pressure hot underground water and mix it with the low pressure cool water.…”

Section: Resultsmentioning

confidence: 99%

Geothermal Energy: Definition and Its Applications

Chettri¹,

Sankarananth²

2022

TTREGS

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The following study has served the definition of geothermal energy and its application in any sort of field in an extended manner. In the study, some objectives have been developed depending on the subject matter. Also, secondary data has been collected by following the qualitative method which are directly related with subject matter. Later on, all the data has been collected depending on the subject matter. Primarily in this study, geothermal energy has been depicted as the renewable energy source of the earth. Also, there are several types of energy sources that have been showcased as the core part of the study. The usages of geothermal energy have been represented and the benefits have been showcased in an appropriate manner. Renewable and clean energy is produced with help of these geothermal energy sources. Gravitation and friction pull is also managed by this particular thermal energy. Thermal energy plants always try to maintain sustainability and environmental factors. Radioactive isotopes are also used by thermal energy planets to generate electricity. Geothermal energy pumps are used to collect energy. Pollution is also mitigated to produce electricity with help of thermal energy plants. These plants allow the demand of electricity to be fulfilled globally. Keyword : Earth, Energy Sources, Geothermal Energy.

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Section: Resultsmentioning

confidence: 99%

Geothermal Energy: Definition and Its Applications

Chettri¹,

Sankarananth²

2022

TTREGS

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“…Finally, the TOPSIS method is used to make a comprehensive decision to select the most suitable scheme from the Pareto solution set for geothermal operators. A detailed introduction to NSGA-II and TOPSIS has been described previously (Yu et al, 2020;Song et al 2021). Further details about optimization objectives and constraints will be described below.…”

Section: Methods Descriptionmentioning

confidence: 99%

Multi‐objective Optimization of Geothermal Extraction from the Enhanced Geothermal System in Qiabuqia Geothermal Field, Gonghe Basin

Song

et al. 2021

Acta Geologica Sinica (Eng)

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A geothermal demonstration exploitation area will be established in the Enhanced Geothermal System of the Qiabuqia field, Gonghe Basin, Qinghai–Xizang Plateau in China. Selection of operational parameters for geothermal field extraction is thus of great significance to realize the best production performance. A novel integrated method of finite element and multi‐objective optimization has been employed to obtain the optimal scheme for thermal extraction from the Gonghe Basin. A thermal‐hydraulic‐mechanical coupling model (THM) is established to analyze the thermal performance. From this it has been found that there exists a contraction among different heat extraction indexes. Parametric study indicates that injection mass rate (Qin) is the most sensitive parameter to the heat extraction, followed by well spacing (WS) and injection temperature (Tin). The least sensitive parameter is production pressure (pout). The optimal combination of operational parameters acquired is such that (Tin, pout, Qin, WS) equals (72.72°C, 30.56 MPa, 18.32 kg/s, 327.82 m). Results indicate that the maximum electrical power is 1.41 MW for the optimal case over 20 years. The thermal break has been relieved and the pressure difference reduced by 8 MPa compared with the base case. The optimal case would extract 50% more energy than that of a previous case and the outcome will provide a remarkable reference for the construction of Gonghe project.

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Analysis and assessment of a novel organic flash Rankine cycle (OFRC) system for low‐temperature heat recovery

Wang

Macián‐Juan

2022

Energy Science & Engineering

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In this paper, a novel organic flash Rankine cycle (OFRC) system for lowtemperature heat recovery is analyzed and optimized using the 3E (energy, exergy, and economic) analysis method and particle swarm optimization algorithm, respectively. Five environmentally friendly organic fluids and three typical heat source conditions are simultaneously discussed during the parametric analysis and optimization process, to obtain a comprehensive understanding of the thermo-economic characteristics of this novel system.The main analysis results show that the biggest exergy loss of the OFRC system is caused by the condenser, followed by the evaporator. About 70% of the specific power cost is caused by the capital investment of the system, and more than 60% of the capital investment is spent on purchasing the highpressure and low-pressure expanders. Under the same operating conditions, the working fluids with high critical temperatures can achieve higher cycle thermal efficiency and lower specific power costs than those with low critical temperatures. The optimization results show that the OFRC system is able to achieve a better thermodynamic performance than the organic Rankine cycle (ORC) and organic flash cycle (OFC) systems, and when the heat source's inlet temperature is set to 100°C, 120°C, and 140°C, R245fa, R290, and R152a are, respectively, recommended as the best working fluid for the OFRC system.Besides this, it is found that the OFC system has the worst thermo-economic performance, and the ORC system can achieve the lowest specific power cost.A new finding is that, for all three systems, the higher the critical temperature of the working fluid, the lower the specific power cost of the system.

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Thermodynamic analysis and multi-objective optimization of a novel power generation system driven by geothermal energy

Cited by 36 publications

References 46 publications

Geothermal Energy: Definition and Its Applications

Geothermal Energy: Definition and Its Applications

Multi‐objective Optimization of Geothermal Extraction from the Enhanced Geothermal System in Qiabuqia Geothermal Field, Gonghe Basin

Analysis and assessment of a novel organic flash Rankine cycle (OFRC) system for low‐temperature heat recovery

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