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ID:
137683
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| Summary/Abstract |
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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| 2 |
ID:
098636
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| Publication |
2010.
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| Summary/Abstract |
This paper presents a spatial model of industrial heat loads and technical recovery potentials in the UK, by recourse to energetic and exergetic analysis methods. The aims were to categorise heat users into broad temperature bands; quantify heat usage and wastage at different temperatures; and to estimate the technical potential for heat recovery based on current technologies (whilst ignoring spatial and temporal constraints). The main data source was the UK National Allocation Plan for the EU Emissions Trading Scheme, supplemented by capacity/output and specific energy consumption data for certain heterogeneous sectors. Around 60% of industry has been covered in terms of energy use, and 90% of energy-intensive sectors. The total annual heat use for these sectors was estimated at 650 PJ, with technically feasible annual savings in the region 36-71 PJ. This is in agreement with the only extant estimates for heat recovery from industrial processes, which are 65 and 144 PJ, respectively.
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