A Comparison of Different Approaches for Assessing Energy Outputs of Combined Heat and Power Geothermal Plants

Fiaschi, Daniele; Manfrida, Giampaolo; Mendecka, Barbara; Tosti, Lorenzo; Parisi, Maria Laura

doi:10.3390/su13084527

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…A commonly used simple method that is adopted from the Digest of UK Energy Statistics (DUKES) assumes that the production of electricity is half as efficient as the production of heat. This derived from the fact that the standalone electricity production plants average an efficiency of about 40%, while the efficiency for separate heat production averages 89% [34]. Therefore, the impact is that the CHP plant will use twice as much fuel to generate one unit of electricity compared to what is required to generate one unit of heat.…”

Section: Accounting For Chp Heat Bonusmentioning

confidence: 99%

Carbon and Greenhouse Gas Emissions from Electricity Consumption in European Union Buildings

Balaras,

Dascalaki,

Patsioti

et al. 2023

Buildings

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The buildings sector is the single most important end-user of final energy in the European Union and a significant contributor to carbon and greenhouse gas emissions. This work focuses on a review of available data that are used to calculate the annual emissions from electricity generation in the European Union and quantify indirect emissions from the use of electricity in the buildings sector. Historical data since 1990 are used to derive simple empirical correlations for the time evolution of emissions factors related to electricity production in each Member State of the European Union. More recent trajectories using data from the last ten years are also presented. The derived correlations can be easily integrated in building stock modeling and national studies to facilitate forward-looking projections of emissions from electricity use in buildings. The EU-27 averages 0.2883 kgCO2-eq/kWhel, ranging from 0.0456 kgCO2-eq/kWhel in Sweden up to 1.0595 kgCO2-eq/kWhel in Poland. As a case study, the derived coefficients are then used to quantify the indirect emissions from the electricity consumption attributed to the building stock in each EU Member State. The calculated total EU-27 GHG indirect emissions attributed to electricity consumption amounted to 215 MtCO2-eq for residential buildings and 201 MtCO2-eq for non-residential buildings. In addition, the proposed correlations are used to demonstrate how they can be used for more realistic future projections of emissions towards the national targets in Greece and Poland.

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Section: Accounting For Chp Heat Bonusmentioning

confidence: 99%

Carbon and Greenhouse Gas Emissions from Electricity Consumption in European Union Buildings

Balaras,

Dascalaki,

Patsioti

et al. 2023

Buildings

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“…As both plants are of the combined heat and power (CHP) type, exergy allocation was applied so that the two types of products can be considered: the Functional Unit is 1 MJ of exergy. Within the plant, components dedicated to electricity or heat production were identified wherever possible; when components were serving a dual purpose, their environmental single score was allocated according to the exergy fractions retraceable to power or heat respectively (Fiaschi et al, 2021). After the Life Cycle Assessment, the LCI was reprocessed to disaggregate the contribution of the most relevant components (Fig.…”

Section: Description Of the Geothermal Power Plantsmentioning

confidence: 99%

Exergo-Economic and Exergo-Environmental Assessment of Two Large Chp Geothermal Power Plants

Manfrida

Talluri

Ungar

et al. 2023

Preprint

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“…Exergy provides a potential indicator of environmental impact [9] and, thus, can be applied to LCA. Using exergy, the life cycle inventory (LCI) assesses the building as a whole [10]. The benefit of including exergy is especially useful in LCAs of buildings where the LCI details of subprocesses may be lacking.…”

Section: Introductionmentioning

confidence: 99%

Exergy-Based Life Cycle Assessment of Buildings: Case Studies

Nwodo

Anumba

2021

Sustainability

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The relevance of exergy to the life cycle assessment (LCA) of buildings has been studied regarding its potential to solve certain challenges in LCA, such as the characterization and valuation, accuracy of resource use, and interpretation and comparison of results. However, this potential has not been properly investigated using case studies. This study develops an exergy-based LCA method and applies it to three case-study buildings to explore its benefits. The results provide evidence that the theoretical benefits of exergy-based LCA as against a conventional LCA can be achieved. These include characterization and valuation benefits, accuracy, and enabling the comparison of environmental impacts. With the results of the exergy-based LCA method in standard metrics, there is now a mechanism for the competitive benchmarking of building sustainability assessments. It is concluded that the exergy-based life cycle assessment method has the potential to solve the characterization and valuation problems in the conventional life-cycle assessment of buildings, with local and global significance.

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A Comparison of Different Approaches for Assessing Energy Outputs of Combined Heat and Power Geothermal Plants

Cited by 8 publications

References 19 publications

Carbon and Greenhouse Gas Emissions from Electricity Consumption in European Union Buildings

Carbon and Greenhouse Gas Emissions from Electricity Consumption in European Union Buildings

Exergo-Economic and Exergo-Environmental Assessment of Two Large Chp Geothermal Power Plants

Exergy-Based Life Cycle Assessment of Buildings: Case Studies

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