Environmental Assessment of Hellisheidi Geothermal Power Plant based on Exergy Allocation Factors for Heat and Electricity Production

Díaz-Ramírez, Maryori C.; Jokull, Snorri; Zuffi, Claudio; Mainar-Toledo, María Dolores; Manfrida, Giampaolo

doi:10.3390/en16093616

Cited by 6 publications

(8 citation statements)

References 25 publications

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“…Despite the Nesjavellir GPP being a combined heat and power (CHP) plant, this study does not describe the three more common allocation methods used in LCA evaluations (i.e., energy, exergy and economic allocations) for this type of energy plant [33]. Instead, this paper focuses exclusively on exergy allocation to assess the environmental burden of electricity and heat from the geothermal CHP plant, as it is the one that is more recently in use and not extensively reported in the literature [16,17,34].…”

Section: Environmental Evaluation Methodologymentioning

confidence: 99%

“…This study analyses the Nesjavellir geothermal power plant (GPP) as it replicates the solution that is already implemented in the Hellishedi geothermal power plant [16,17]. The innovations applied to this power plant are Carbfix [18] and Sulfix [19], which aim to minimise the emissions of CO 2 and H 2 S, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The application of the life cycle assessment (LCA) methodology has proven to be a valuable and promising tool for conducting a comprehensive analysis of the environmental impacts of geothermal energy conversion [16,17,20]. Its utilisation has demonstrated its capability to generate quantitative results and facilitate comparisons among different types of plants and resource conditions.…”

Section: Introductionmentioning

confidence: 99%

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Environmental Impact Assessment of Nesjavellir Geothermal Power Plant for Heat and Electricity Production

Mainar-Toledo,

Díaz-Ramírez,

Egilsson

et al. 2023

Sustainability

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This work is focused on presenting the main results and discussions concerning the environmental benefits of reducing the non-condensable gases emitted from the Nesjavellir geothermal power plant. The primary objective of this study is to conduct a life cycle evaluation to analyse the overall environmental benefit effects of producing 1 kWh of electricity and 1 kWh of thermal energy in the geothermal power plant at Nesjavellir, which is located in Iceland. The assessment is performed both before and after implementing an abatement system designed to reduce CO2 and H2S gases. The production of geothermal energy is increasing every year and, therefore, it is crucial to identify and quantify the key environmental factors of producing this type of energy and improvements for the future energy transition of the energy generation sector. Firstly, the results show that the environmental impact of electricity production is higher compared to heat production. More in detail, the emissions due to the nature of the geothermal fluid and the construction phase represent the most relevant environmental load for both electricity and heat production for nearly all the 18 environmental impact indicators studied. Furthermore, considering the abatement system for the non-condensable gas emissions, reductions of 78% and 60% in global warming potential is achieved for a production of 1 kWh of electricity and 1 kWh of thermal energy. In terms of external environmental costs, the implementation of an abatement system results in a reduction exceeding 95% for both electricity and thermal energy production per kilowatt-hour. The outcomes obtained from both the baseline scenario and the application of the abatement system undeniably prove that the latter results in a substantial decrease in the overall environmental impacts linked to the generation of 1 kWh of electricity and 1 kWh of heat, encompassing a notable reduction in external environmental costs (externalities).

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Section: Environmental Evaluation Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Environmental Impact Assessment of Nesjavellir Geothermal Power Plant for Heat and Electricity Production

Mainar-Toledo,

Díaz-Ramírez,

Egilsson

et al. 2023

Sustainability

Self Cite

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“…Díaz-Ramírez et al [96] conducted an environmental evaluation of the Hellisheidi geothermal power plant using exergy allocation factors. The geothermal plant, a combined heat and power double-flash facility located around 30 km east of Reykjavik, Iceland's capital, has an installed capacity of 303.3 MW of electricity and 133 MW of heat.…”

Section: Energy Saving In Buildingsmentioning

confidence: 99%

Review of Hot Topics in the Sustainable Development of Energy, Water, and Environment Systems Conference in 2022

Chu,

Vicidomini,

Calise

et al. 2023

Energies

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The current applications in the energy sector are based largely on fossil fuels which release greenhouse gas emissions to the atmosphere. To face the issue of global warming, the energy sector has to transfer to and develop sustainable energy solutions that do not release carbon emissions. This is one of the primary motivators for the SDEWES conference as well as for this review, and previous ones, examining the most recent works based on sustainable and green energy production in such fields. The 17th Conference on the Sustainable Development of Energy, Water, and Environment Systems (SDEWES) was held on 6–10 November 2022 in Paphos, Cyprus. The SDEWES conference aims at solving complex and ongoing concerns that approach a long-term perspective and supporting innovative solutions and continuous monitoring and evaluation. This review paper aims at collecting the main presented papers focused on the following hot topics: low-carbon technologies based on renewable and clean-energy systems, including mainly biomass, solar, and wind energy applications; energy storage systems; hydrogen-based systems; energy-saving strategies in buildings; and the adoption of smart management strategies using renewable energy systems. These topics are investigated in order to propose solutions to address the issues of climate change, water scarcity, and energy saving. From the analyzed works, we note that some key issues for sustainable development remain to be further addressed: such as novel and advanced energy storage systems, green hydrogen production, novel low-temperature district heating and cooling networks, novel solar technologies for the simultaneous production of power and high temperature heat, solar desalination for hydrogen production systems, and agrivoltaic systems for the production of power and food.

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“…Despite a small decrease in electricity production, the AHP scenario offers improved efficiency and a potential increase in total electricity generated by over 0.4%. The study performed by Diaz-Ramirez et al [78] used a life-cycle assessment approach based on the exergy allocation factor, considering all life-cycle stages from construction to dismantling. The results showed that most of the environmental impact was attributed to electricity production, and the construction stage was the most impactful.…”

mentioning

confidence: 99%

Review of Methods for Diagnosing the Degradation Process in Power Units Cooperating with Renewable Energy Sources Using Artificial Intelligence

Ziółkowski,

Drosińska-Komor,

Głuch

et al. 2023

Energies

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This work is based on a literature review (191). It mainly refers to two diagnostic methods based on artificial intelligence. This review presents new possibilities for using genetic algorithms (GAs) for diagnostic purposes in power plants transitioning to cooperation with renewable energy sources (RESs). The genetic method is rarely used directly in the modeling of thermal-flow analysis. However, this assignment proves that the method can be successfully used for diagnostic purposes. The GA method was presented in this work for thermal-flow studies of steam turbines controlled from the central power system to obtain the stability of RESs. It should be remembered that the development of software using genetic algorithms to locate one-off degradations is necessary for a turbine that works sustainably with RESs. In this paper, against the background of the review, diagnostic procedures create an inverse model of a thermal power plant. Algorithms were used to detect fast global extremes through the convergence of simulated signatures with signs explaining degradation. In addition, statistical dependencies are used in the selection phase to accelerate fault detection. The created procedure allows obtaining a diagnosis in the form of a single degradation. This procedure turns out to be quite effective for the above example.

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Environmental Assessment of Hellisheidi Geothermal Power Plant based on Exergy Allocation Factors for Heat and Electricity Production

Cited by 6 publications

References 25 publications

Environmental Impact Assessment of Nesjavellir Geothermal Power Plant for Heat and Electricity Production

Environmental Impact Assessment of Nesjavellir Geothermal Power Plant for Heat and Electricity Production

Review of Hot Topics in the Sustainable Development of Energy, Water, and Environment Systems Conference in 2022

Review of Methods for Diagnosing the Degradation Process in Power Units Cooperating with Renewable Energy Sources Using Artificial Intelligence

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