Application of a genetic algorithm to optimize the exergy performance of a vapor compression refrigeration system

Valencia, Guillermo; Castro, Sergio Leon; Narvaez, Milled de Jesus Pallares

doi:10.12988/ces.2018.8396

Cited by 3 publications

(1 citation statement)

References 5 publications

(9 reference statements)

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“…Exergy analysis using computer aided tools is useful to generate, evaluate, and determine sustainable processes and its improvement potential [11]. In fact, exergy analysis provides information related to irreversibilities and efficiency, which are used in calculate exergo-environmental parameters as renewability indicator and sustainability index [13]. The aim of this work is to study third-generation biodiesel from Chlorella vulgaris microalgae from an environmental point of view using a computer-aided exergy analysis.…”

Section: Introductionmentioning

confidence: 99%

Computer-aided exergo-environmental analysis of biodiesel production process from microalgal biomass

Ochoa-Garcia¹,

Tejeda-Lopez²,

Ojeda-Delgado³

et al. 2018

ces

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Nowadays, biodiesel is recognized as one of the best alternative to fossil fuels due to its renewability, environmentally-friendly nature and simple preparation from different feedstocks such as microalgae. In this work, biodiesel was produced from Chlorella vulgaris microalgae and its environmental performance was evaluated applying an exergo-environmental analysis. This process was simulated using Computer Aided Process Engineering (CAPE) tools in a commercial software to determine the main operating conditions of all streams. An exergy balance around the system was carried out to determine both exergy losses and exergy inlets, which were used to determine exergo-environmental parameters. The Sustainability Index (SI), Renewability Indicator (RI), Net Energy Ratio (NER), and Net Energy Value (NEV) were calculated. It was obtained a SI value of 8.18 indicating that the input exergy is higher than the exergy destruction. The NEV and NER parameters were 38,846.31 MJ/kg BD and 1.19, respectively. The effect of use of fossil fuel-derived energy on the RI was also analyzed and it was found an improvement opportunity in this parameter by increasing the percentage of non-renewable energy substitution. These results revealed that third-generation biodiesel production from 2202 María Ochoa-García et al. microalgae represents an exergy efficient, environmentally sustainable, and renewable alternative for replacing fossil fuels.

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Section: Introductionmentioning

confidence: 99%