Energy and exergy analyses of energy consumptions in the industrial sector in South Africa

Oladiran, M. Tunde; Meyer, Josua P.

doi:10.1016/j.apenergy.2007.02.004

Cited by 59 publications

(22 citation statements)

References 11 publications

(19 reference statements)

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“…Energy (h) and exergy (j) efficiencies are defined as: h ¼ energy in products total energy input Â 100%; (15) j ¼ exergy in products total exergy input Â 100%; (16) These definitions are used to determine the energy and exergy efficiencies for the principal types of processes considered in the present study. Exergy efficiency can often be written as a function of the corresponding energy efficiency by assuming the exergy grade function, g f , to be one.…”

Section: Energy and Exergy Efficienciesmentioning

confidence: 99%

Energy and exergy utilizations of the U.S. manufacturing sector

Al-Ghandoor

Phelan²,

Villalobos

et al. 2010

Energy

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Section: Energy and Exergy Efficienciesmentioning

confidence: 99%

Energy and exergy utilizations of the U.S. manufacturing sector

Al-Ghandoor

Phelan²,

Villalobos

et al. 2010

Energy

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“…Wall [49] has examined energy and exergy flows in industrial processes. The industrial sectors of several countries have been investigated using exergy, including Turkey [50,51] and South Africa [52]. The global industrial sector has also been examined with exergy methods [43].…”

Section: Regional and National Applications Of Exergy Analysismentioning

confidence: 99%

Using Exergy to Correlate Energy Research Investments and Efficiencies: Concept and Case Studies

Rosen

2013

Entropy

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Abstract:The use of exergy to correlate energy-utilization efficiencies and energy research investments is described. Specifically, energy and exergy losses are compared with energy research and development expenditures, demonstrating that the latter correlates with energy losses, even though it would be more sensible to allocate energy research and development funding in line with exergy losses, as they represent the actual deviation of efficiency from the ideal. The methodology is outlined and illustrated with two case studies. The case studies consider the province of Ontario, Canada and the United States. The investigation utilizes data on the energy utilization in a country or region, including flows of energy and exergy through the main sectors of the economy. The results are expected to be of use to government and public authorities that administer research and development funding and resources and should help improve the effectiveness of such investments.

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“…A summary of exergy analyses for different countries can be found in Ertesvag (2001). The concept has been also applied to cross-country analysis of some industrial segments (Ozdogan and Arikol, 1995;Dincer et al, 2003;Rasul et al, 2005;Oladiran and Meyer, 2007;Utlu and Hepbasli, 2007), residential sector (Saidur et al, 2007a;AlGhandoor et al, 2008), transportation sector (Dincer et al, 2004;Utlu and Hepbasli, 2006a;Ji and Chen, 2006;Ediger and Camdali, 2007;Saidur et al, 2007b) and agricultural sector Utlu and Hepbasli, 2006b). The purpose of this section is to discuss the main mathematical relations necessary to conduct energy and exergy analyses in the transportation sector.…”

Section: Energy and Exergy Modellingmentioning

confidence: 99%