Understand the three different scales for measuring primary energy and avoid errors

Lightfoot, H. Douglas

doi:10.1016/j.energy.2006.10.009

Cited by 26 publications

(9 citation statements)

References 1 publication

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“…Significant differences of opinion exist over how to measure primary energy supply, according to Lightfoot (2007), and energy institutions do no publish error analyses with their data. Rigorous data for the allocation of energy to conversion devices, passive systems, and final services is more difficult to obtain due to the lack of global studies.…”

Section: Data Accuracymentioning

confidence: 96%

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The efficient use of energy: Tracing the global flow of energy from fuel to service

2010

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Section: Data Accuracymentioning

confidence: 96%

“…However, Lightfoot (2007) explains that the scales used to measure energy supplies differ between international data sources. The main differences arise from the way energy is calculated for electricity generated from renewable and nuclear energy, and the varied groupings for 'combustible renewables and waste'.…”

Section: Energy Sourcesmentioning

confidence: 98%

The efficient use of energy: Tracing the global flow of energy from fuel to service

2010

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“…For renewables, this means counting the energy content of electricity, which is the first form of energy which can be used in multiple ways, as primary energy and exergy. There are some differences between organisations which use the PCM in the method of accounting for solar thermal and geothermal electricity-the IEA use the electricity content times 1/0.33 and 1/0.10, respectively, whilst IPCC Working Group 3 use the energy content of electricity [27]. In our analysis, we opt to use the latter convention when investigating the PCM.…”

Section: Accounting For Primary and Final Exergymentioning

confidence: 99%

“…There are different ways of accounting for the primary energy (and thus exergy) content of renewable electricity [6,27,28], and no consensus on the preferred approach. For electricity from nuclear, the heat generated to produce the electricity tends to be counted as the primary input [28], making it roughly equivalent to fossil fuel-derived power.…”

Section: Accounting For Primary and Final Exergymentioning

confidence: 99%

Exergy Accounting: A Quantitative Comparison of Methods and Implications for Energy-Economy Analysis

2016

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Abstract:Assessments of the feasibility of decoupling energy consumption from economic growth could benefit from an improved understanding of the size, nature and value of different energy flows. This understanding may be enhanced by focusing upon so-called "useful exergy"-a measure of both the quantity and "quality" of energy (defined here as its thermodynamic ability to perform physical work) at the "useful" stage of the energy conversion chain. Useful exergy flows within national economies are increasingly being quantified and their role in economic activity explored. However, this so-called "exergy economics" field currently lacks a consistent methodology. This paper contributes to the development of a more consistent approach. By constructing a "useful exergy account" for the United Kingdom covering the period 1960-2012, we explore how different methodological choices influence estimates of useful exergy for different categories of end-use as well as estimates of total national useful exergy consumption. Specifically, we evaluate the sensitivity of estimates to: (a) the method of estimating the exergy efficiency of different end-uses; (b) the boundaries between end-use categories; and (c) the method of estimating the primary exergy associated with renewable electricity. We also improve upon the current method of accounting for industrial uses of heat. This leads to suggestions for best practice when constructing useful exergy accounts, and the identification of areas where further methodological development is required.

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“…Finally, the primary equivalent of renewable energy flows was estimated by the physical content method [82][83][84][85][86], which estimates the primary equivalent as the energy content of the first usable form of renewable flows (i.e., electricity or heat). Accordingly, the primary equivalent of secondary energy imports was calculated under the domestic technology assumption, which estimates the primary equivalent as the amount of primary energy that would have been necessary for domestic energy industries to produce all imports of secondary energy flows.…”

Section: Data Processingmentioning

confidence: 99%

The Status and Evolution of Energy Supply and Use in Mexico Prior to the 2014 Energy Reform: An Input-Output Approach †

et al. 2017

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Abstract:In 2014, the Mexican government approved a bold energy reform that allows private energy companies to freely participate in the energy market (something prohibited during the previous eight decades). This reform is expected to significantly restructure the energy sector and boost and diversify the energy production. Moreover, changes in the energy sector and production might lead to structural changes in the rest of the economy and ultimately generate significant economic benefits for the country. Nevertheless, the fundamental role of the energy sector in this oil producing country makes the potential impacts of the reform complex to forecast. The objective of the study is to analyze the current state, evolution, and driving factors of the total primary energy use in Mexico in 2003-2012 (prior to the implementation of the reform) as a precedent for future analyses of impacts of the energy reform. The results show three driving factors of the evolution of primary energy use: final non-energy demand, direct energy intensity, and economic structure. Also, it was found that the energy sector has been in a precarious situation regarding its structure and efficiency. However, this situation had a small effect on the evolution of primary energy use.

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Understand the three different scales for measuring primary energy and avoid errors

Cited by 26 publications

References 1 publication

The efficient use of energy: Tracing the global flow of energy from fuel to service

The efficient use of energy: Tracing the global flow of energy from fuel to service

Exergy Accounting: A Quantitative Comparison of Methods and Implications for Energy-Economy Analysis

The Status and Evolution of Energy Supply and Use in Mexico Prior to the 2014 Energy Reform: An Input-Output Approach †

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