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Open AccessArticle

Life Cycle Assessment of a Combined-Cycle Gas Turbine with a Focus on the Chemicals Used in Water Conditioning

1
Facultad de Ingeniería, Universidad Nacional Autónoma de México, Av. Universidad 3000, 04510 Ciudad de México, Mexico
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Dirección de Ingeniería Ambiental y Biotecnología. Universidad Politécnica del Estado de Morelos, Paseo Cuauhnáhuac No. 566, 62550 Jiutepec, Morelos, Mexico
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CONACYT-Universidad Autónoma Metropolitana, Unidad Azcapotzalco, Av. San Pablo No. 180, 02200 Ciudad de México, Mexico
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(10), 2912; https://doi.org/10.3390/su11102912
Received: 10 April 2019 / Revised: 14 May 2019 / Accepted: 15 May 2019 / Published: 22 May 2019
(This article belongs to the Special Issue Environmental Life Cycle Assessment)
Life Cycle Assessments (LCAs) of thermoelectric plants frequently focus on impacts related to fuel and water consumption. The purpose of this research was to determine the environmental impact of the chemicals used for water conditioning in a Combined-Cycle Gas Turbine (CCGT) plant in Mexico. An LCA of the electricity generation process was carried out using the SimaPro software with the ReCiPe method, which includes 18 midpoint environmental impact categories. The process was broken down into stages, which were analyzed separately. To complete the study, an analysis of the fuel cycle and the materials used for maintenance works were included. Results showed that the most affected impact categories were water depletion (9.77 × 10−1 m3/MWh), due mainly to the high volume of water consumption in the cooling systems and the reverse osmosis process; freshwater, marine, and terrestrial ecotoxicity (1.59 × 10−2 kg 1,4 -DB eq/MWh), and human toxicity (1.1 × 10−1 kg 1,4-DB eq/MWh)—due to the production and consumption of the chemicals used. One such chemical is hydrazine, which is a highly toxic compound to humans and other living organisms. It is worth mentioning that traces of some chemicals in wastewater discharges could be considered as emerging pollutants because of their potential health hazards, which have not been reported yet. View Full-Text
Keywords: water quality; life cycle assessment; emerging pollutants; combined-cycle gas turbine; chemical compounds; hydrazine; electric power generation water quality; life cycle assessment; emerging pollutants; combined-cycle gas turbine; chemical compounds; hydrazine; electric power generation
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Ferat Toscano, C.; Martin-del-Campo, C.; Moeller-Chavez, G.; Leon de los Santos, G.; François, J.-L.; Revollo Fernandez, D. Life Cycle Assessment of a Combined-Cycle Gas Turbine with a Focus on the Chemicals Used in Water Conditioning. Sustainability 2019, 11, 2912.

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