Society exergy analysis: a comparison of different societies

Ertesvåg, Ivar S.

doi:10.1016/s0360-5442(00)00070-0

Cited by 136 publications

(70 citation statements)

References 9 publications

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“…Sectoral exergy research, including the non-domestic sector, has been undertaken in the past 20 years in countries such as the U.K., Norway, Turkey, Saudi Arabia, Malaysia, Greece, Japan, U.S., and Canada (Al-Ghandoor, 2013;Dincer et al, 2004;Ertesvåg, 2001;Gasparatos et al, 2009;Hammond and Stapleton, 2001;Kondo, 2009;Reistad Gordon, 1980;Rosen, 2013;Rosen, 1992;Saidur et al, 2007;Utlu and Hepbasli, 2003;Xydis et al, 2009). The majority of these studies approach the sectoral exergy analysis from a top-down econometric approach.…”

Section: )mentioning

confidence: 99%

Modelling the energy and exergy utilisation of the Mexican non-domestic sector: A study by climatic regions

et al. 2015

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This paper presents the development of a bottom-up stock model to perform a holistic energy study of the Mexican non-domestic sector. The current energy and exergy flows are shown based on a categorisation by climatic regions with the aim of understanding the impact of local characteristics on regional efficiencies. Due to the limited data currently available, the study is supported by the development of a detailed archetype-based stock model using EnergyPlus as a first law analysis tool combined with an existing exergy analysis method. Twenty-one reference models were created to estimate the electric and gas use in the sector. The results indicate that sectoral energy and exergy annual input are 95.37 PJ and 94.28 PJ respectively. Regional exergy efficiencies were found to be 17.8%, 16.6% and 23.2% for the hot-dry, hot-humid and temperate climates respectively. The study concludes that significant potential for improvements still exists, especially in the cases of space conditioning, lighting, refrigeration, and cooking where most exergy destructions occur. Additionally, this work highlights that the method described may be further used to study the impact of large-scale refurbishments and promote national regulations and standards for sustainable buildings that takes into consideration energy and exergy indicators.

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Section: )mentioning

confidence: 99%

Modelling the energy and exergy utilisation of the Mexican non-domestic sector: A study by climatic regions

et al. 2015

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“…The authors found an exergy conversion performance of 1.3% for households and 38.5% for the tertiary sector. In the past 20 years, several other exergy-based sectoral studies have been developed for countries such as the U.K. (Brockway et al, 2014;Gasparatos et al, 2009;Hammond and Stapleton, 2001), Italy (Wall et al, 1994), Norway (Ertesvåg, 2001), Turkey (Rosen and Dincer, 1997;Utlu and Hepbasli, 2003), China (Chen and Chen, 2006;Brockway et al, 2015), Mexico (García Kerdan, Morillón Gálvez et al, 2015), Jordan (Al-Ghandoor, 2013), U.S. (Reistad, 1980), Denmark (Bühler et al, 2016), and Canada (Rosen, 1992). Rosen (2013) described that exergetic-based sectoral analysis showed that actual efficiencies in the building sector are lower than the perceived inefficiencies commonly published in government annual reports, while in sectors such as the transportation and utility the efficiencies are higher than the perceived efficiencies.…”

Section: Building Stock Modelsmentioning

confidence: 99%

The role of an exergy-based building stock model for exploration of future decarbonisation scenarios and policy making

et al. 2017

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State-of-the-art research suggests that energy systems are best evaluated using exergy analysis, as exergy represents the real value of an energy source, demonstrating it to be the only rational basis for evaluation. After discovering the lack of thermodynamic integration into stock modelling, this paper presents the development of an exergy-based building stock model. The aim of this paper is twofold. Firstly, to investigate the impact of large-scale future energy retrofit scenarios in the English and Welsh (E&W) non-domestic sector, and secondly, to determine the potential of exergy analysis in improving sectoral efficiency and its potential implications on exergy-oriented policy making. The research explores seven different largescale future retrofit scenarios that encompass typical, low-carbon, and low-exergy approaches. Modelling results show that by 2050, current regulations have the potential to reduce carbon emissions by up to 49.0 ±2.9% and increasing sector thermodynamic efficiency from 10.7% to 13.7%. On the other hand, a low-exergy oriented scenario based on renewable electricity and heat pumps is able to reduce carbon emissions by 88.2 ±2.4%, achieving a sectoral exergy efficiency of 19.8%. This modelling framework can provide energy policy makers with new insights on policy options based on exergy indicators and the assessment of their potential impact.

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“…In a strict physical sense some societies seems more efficient than others, however in a wider perspective a society cannot be simplified like this [25]. Still, exergy analysis can be used in order to better understand the quality of and degradation of physical resources in the society at all levels.…”

Section: Comparison With Other Studiesmentioning

confidence: 99%

“…Exergy flow diagrams have also been made for several other countries, e.g., Japan [5], Canada [8], Italy [6], Norway [9,18], and China [19][20][21][22][23][24]. Ertesvåg [25] estimated the total exergy efficiency for a number of different countries to be approximately 0.1 to 0.3 and concluded that the structure of the energy system is of main importance in this regard. This paper will mainly focus on surveying the supply of energy and materials in the Swedish society, and the detailed processes will not be analyzed in this paper.…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of the Supply of Energy and Material Resources in the Swedish Society

Gong

Wall²

2016

Energies

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Abstract:Exergy is applied to the Swedish energy supply system for the period 1970-2013. Exergy flow diagrams for the systems of electricity and district heating as well as for the total supply system of energy and material resources for 2012 are presented. The share of renewable use has increased in both electricity and district heat production. The resource use is discussed in four sectors: residential and service, transportation, industry and agriculture. The resource use is also analyzed with respect to exergy efficiency and renewable share. The total exergy input of energy and material resources amounts to about 2700 PJ of which about 530 PJ was used for final consumption in 2012. The results are also compared with similar studies. Even though the share of renewable resource use has increased from 42% in 1980 to 47% in 2012, poor efficiency is still occurring in transportation, space heating, and food production. A strong dependence on fossil and nuclear fuels also implies a serious lack of sustainability. A more exergy efficient technology and a higher renewable energy share are needed in order to become a more sustainable society.

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Society exergy analysis: a comparison of different societies

Cited by 136 publications

References 9 publications

Modelling the energy and exergy utilisation of the Mexican non-domestic sector: A study by climatic regions

Modelling the energy and exergy utilisation of the Mexican non-domestic sector: A study by climatic regions

The role of an exergy-based building stock model for exploration of future decarbonisation scenarios and policy making

Exergy Analysis of the Supply of Energy and Material Resources in the Swedish Society

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