Life cycle assessment of Organic Rankine Cycles for geothermal power generation considering low-GWP working fluids

Heberle, Florian; Schifflechner, Christopher; Brüggemann, Dieter

doi:10.1016/j.geothermics.2016.06.010

Cited by 99 publications

(34 citation statements)

References 29 publications

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“…A sensitivity analysis has been conducted according to the possible case of a leakage of R245fa fluid in the ORC system. According to Heberle, Schifflechner, & Brüggemann (2016), an annual leakage of 2% is assumed as a possible scenario in the whole life of an ORC system.…”

Section: Resultsmentioning

confidence: 99%

Sustainability assessment of a novel micro solar thermal: Biomass heat and power plant in Morocco

Herrera

Rodríguez-Serrano

Garraín

et al. 2020

J of Industrial Ecology

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Novel renewable energy technologies in the Middle East and North Africa region can be developed through microgeneration systems aiming to supply local energy demands in a sustainable way. In this study, we carried out a sustainability assessment combining two reputable methodologies which have been applied to a facility comprising a hybrid solar/biomass micro‐cogeneration organic ranking cycle system located in Morocco. We first applied a multiregional input–output analysis where economic issues such as the production of goods and services generated in all project's phases, as well as the added value and employment created, are estimated. Then, environmental impacts were assessed through a life cycle assessment (LCA). In terms of socioeconomic analysis, the total production of goods and services shows a value of 1.18 €2015/kWh. The added value and employment creation were 0.56 €2015/kWh and 0.05 full‐time employees/MWh, respectively. The levelized cost of electricity results in 0.218 €2015/kWh and the multiplier effect amounts to 2.26. The largest increase in sectorial output is produced in the Moroccan electricity sector and the largest job creation takes place in the agriculture sector from the biomass supply. Regarding environmental results, LCA shows a climate change potential of 11.8 g CO2 eq/kWhel, of which more than 70% comes from the boiler operation and specifically from the emissions due to biomass transportation. These results can help in promoting micro solar‐biomass systems in Morocco as they identify the socioeconomic and environmental benefits that can counterbalance the higher costs of such systems compared to fossil technologies.

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Section: Resultsmentioning

confidence: 99%

Sustainability assessment of a novel micro solar thermal: Biomass heat and power plant in Morocco

Herrera

Rodríguez-Serrano

Garraín

et al. 2020

J of Industrial Ecology

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show abstract

“…A quantitative evaluation of the environmental costs through Life Cycle Analysis (LCA) allows renewable energy technologies to be compared among themselves and with traditional forms of power generation [3,4]. LCA is gaining attention also for the evaluation of geothermal power plants [5,6], with a specific focus on organic Rankine cycle (ORC) [7] or enhanced geothermal systems (EGS) [8,9]. Currently, methodological guidelines for geothermal LCA studies are being developed in the frame of the GEOENVI EU H2020 Project [10,11].…”

Section: Introductionmentioning

confidence: 99%

LCA and Exergo-Environmental Evaluation of a Combined Heat and Power Double-Flash Geothermal Power Plant

et al. 2021

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This study deals with the life cycle assessment (LCA) and an exergo-environmental analysis (EEvA) of the geothermal Power Plant of Hellisheiði (Iceland), a combined heat and power double flash plant, with an installed power of 303.3 MW for electricity and 133 MW for hot water. LCA approach is used to evaluate and analyse the environmental performance at the power plant global level. A more in-depth study is developed, at the power plant components level, through EEvA. The analysis employs existing published data with a realignment of the inventory to the latest data resource and compares the life cycle impacts of three methods (ILCD 2011 Midpoint, ReCiPe 2016 Midpoint-Endpoint, and CML-IA Baseline) for two different scenarios. In scenario 1, any emission abatement system is considered. In scenario 2, re-injection of CO2 and H2S is accounted for. The analysis identifies some major hot spots for the environmental power plant impacts, like acidification, particulate matter formation, ecosystem, and human toxicity, mainly caused by some specific sources. Finally, an exergo-environmental analysis allows indicating the wells as significant contributors of the environmental impact rate associated with the construction, Operation & Maintenance, and end of life stages and the HP condenser as the component with the highest environmental cost rate.

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“…Therefore, the environmental impact of working fluids for the ORC cannot be neglected. Heberle et al [23] performed a Life Cycle Analysis (LCA) for geothermal power generation in binary power plants with ORC facilities, based on scenarios with representative conditions from Germany, to evaluate potential plant concepts considering fluid work losses and the associated environmental impact. This study found that substituting working fluids such as R245fa and R134a with low Global Warming Potentials (GWP) fluids such as R1233zd and R1234yf leads to 2% higher exergetic efficiency and an 83% reduction of global warming impact.…”

Section: Introductionmentioning

confidence: 99%

“…where w i is the Eco 99 coefficient of the component. Therefore, the environmental impact of a component (Y LCA k ) can be calculated using Equation (23).…”

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confidence: 99%

Exergy, Economic, and Life-Cycle Assessment of ORC System for Waste Heat Recovery in a Natural Gas Internal Combustion Engine

2020

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In this article, an organic Rankine cycle (ORC) was integrated into a 2-MW natural gas engine to evaluate the possibility of generating electricity by recovering the engine’s exhaust heat. The operational and design variables with the greatest influence on the energy, economic, and environmental performance of the system were analyzed. Likewise, the components with greater exergy destruction were identified through the variety of different operating parameters. From the parametric results, it was found that the evaporation pressure has the greatest influence on the destruction of exergy. The highest fraction of exergy was obtained for the Shell and tube heat exchanger (ITC1) with 38% of the total exergy destruction of the system. It was also determined that the high value of the heat transfer area increases its acquisition costs and the levelized cost of energy (LCOE) of the thermal system. Therefore, these systems must have a turbine technology with an efficiency not exceeding 90% because, from this value, the LCOE of the system surpasses the LCOE of a gas turbine. Lastly, a life cycle analysis (LCA) was developed on the system operating under the selected organic working fluids. It was found that the component with the greatest environmental impact was the turbine, which reached a maximum value of 3013.65 Pts when the material was aluminum. Acetone was used as the organic working fluid.

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Life cycle assessment of Organic Rankine Cycles for geothermal power generation considering low-GWP working fluids

Cited by 99 publications

References 29 publications

Sustainability assessment of a novel micro solar thermal: Biomass heat and power plant in Morocco

Sustainability assessment of a novel micro solar thermal: Biomass heat and power plant in Morocco

LCA and Exergo-Environmental Evaluation of a Combined Heat and Power Double-Flash Geothermal Power Plant

Exergy, Economic, and Life-Cycle Assessment of ORC System for Waste Heat Recovery in a Natural Gas Internal Combustion Engine

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