Performance measures in geothermal power developements

Varney, Josephine; Zarrouk, Sadiq J.; Bean, Nigel; Bendall, Betina

doi:10.1016/j.renene.2016.09.046

Cited by 14 publications

(5 citation statements)

References 8 publications

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“…The power plant model itself could also be improved, and new design parameters could be addressed, such as the sizing of the condenser and the optimization of the working fluid which could also be a mixture [37]. Other objectives functions could be considered in future work [38], such as energy and exergy efficiency, cost, environmental footprint, etc. The opportunity to create a synergy between a geothermal power plant and other facilities (e.g., liquid natural gas [39], hydrogen production [40], etc.…”

Section: Discussionmentioning

confidence: 99%

Optimization of geothermal power plant design for evolving operating conditions

Pollet

Gosselin

Dallaire

et al. 2018

Applied Thermal Engineering

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Section: Discussionmentioning

confidence: 99%

Optimization of geothermal power plant design for evolving operating conditions

Pollet

Gosselin

Dallaire

et al. 2018

Applied Thermal Engineering

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“…Because the study area is located in a high-altitude area, water boils at 80°C. Hence, the sampling temperature for the geothermal water will be ≥80°C when using the quartz or chalcedony geothermometers to calculate the temperature of the thermal reservoir (Fournier, 1977;Varney et al, 2017;Verma and Santoyo, 1997). We calculate the temperatures using the equation, which considers the largest steam loss, and the results are given in Table 2. Of the chosen geothermometers, the Na/K geothermometer is least affected by mixing between cold water and thermal water.…”

Section: Geothermometer For the Thermal Watermentioning

confidence: 99%

Hydrochemistry and H‐O‐C‐S Isotopic Geochemistry Characteristics of Geothermal Water in Nyemo‐Nagqu, Tibet

Wang

Liu

Shao

2017

Acta Geologica Sinica (Eng)

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Nyemo-Nagqu, Tibet, is rich in high-temperature geothermal resources. The geothermal fields in Yangbajain and Yangyi as well as 11 unexplored geothermal fields along the geothermal belt from Nyemo to Nagqu were systematically investigated and the hydrochemistry data were collected from the whole field. Meanwhile, H-O-C-S isotope data were obtained for the new fields, and H-O isotope data for the Yangbajain and Yangyi fields. A comparison of the Nyemo-Nagqu geothermal fields with those in the Yangbajain area shows that the types of high-temperature geothermal water are dominated by Cl-Na and Cl·HCO 3 -Na, while the types of medium-high-temperature geothermal water are dominated by HCO 3 -Na. The concentrations of Li, F, SiO 2 , and HBO 2 in the geothermal water are positively correlated with Cl content, indicating possible mixing with magma water. The reservoir temperatures range from 90 to 270°C by geothermometers. Slight drifting of 18 O was recorded at the Dongweng and Nyingzhong high-temperature geothermal fields, while more significant drifting was recorded at Gulu. The geothermal water is mainly replenished by atmospheric precipitation. The low tritium contents (<1 TU) of the geothermal water from Nyingzhong, Gulu, and Luoma indicate that it is mainly replenished by sub-modern (prior to 1952) water, while the high tritium content (8.4 TU) in Yuela implies modern water replenishment. Other geothermal fields are replenished by a mix of sub-modern fresher water. The isotopic data in this study show that the carbon and sulfur in the geothermal water originates mainly from sediment leaching, with some of the carbon and sulfur having a deep origin.

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“…The estimation of the reservoir potential (and the uncertainty associated with this value) connected to power plant sizing was frequently the object of studies and discussion [10][11][12], as clearly remarked by Steffansson in [13] and DiPippo in the classic textbook about geothermal power plants [14].…”

Section: Introductionmentioning

confidence: 99%

“…In some cases, the plants showed significant reductions in power output due to the depletion of the reservoirs [10][11][12]. Wrong sizing in this case was generated by an overestimation of the reservoir potential, driven by the desire of a fast recovery of the main economic investment.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Sizing of Geothermal Power Plants: Appropriate Potential Assessment Methods

Franco

Vaccaro

2020

Sustainability

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The paper analyzes the problem of defining the potential of geothermal reservoirs and the definition of a sustainable size of a geothermal power plant in the preliminary design phase. While defining the size of a geothermal plant, the objective is to find a compromise between renewability, technical sustainability, and economic return-related issues. In the first part of the paper the simplified lumped parameter approach based on the First-Order methods and their further evolutions and limitations is proposed. Experimental data available for some geothermal reservoirs are used for critical analysis of the simplified approaches for estimating the renewability and sustainability of the production of geothermal plants. In the second part the authors analyze methods based on theoretical heat transfer analysis supported by experimental data acquired from the geothermal field (thermal properties of the rock, porosity of the reservoir, and natural heat flux) and finally consider the numerical simulation as a method to connect the two approaches discussed before. The sustainability of geothermal power production can be estimated taking into account the energy stored in the reservoir and the thermal and fluid dynamic analysis of the reservoir. From this perspective, the numerical simulation of the reservoir can be considered as an effective method for the estimation of a sustainable mass flow rate extraction. Some specific cases are analyzed and discussed.

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Performance measures in geothermal power developements

Cited by 14 publications

References 8 publications

Optimization of geothermal power plant design for evolving operating conditions

Optimization of geothermal power plant design for evolving operating conditions

Hydrochemistry and H‐O‐C‐S Isotopic Geochemistry Characteristics of Geothermal Water in Nyemo‐Nagqu, Tibet

Sustainable Sizing of Geothermal Power Plants: Appropriate Potential Assessment Methods

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