Ortzi Akizu-Gardoki | University of the Basque Country, Euskal Herriko Unibertsitatea (original) (raw)
Papers by Ortzi Akizu-Gardoki
Lecture notes in mechanical engineering, 2024
Sustainable Production and Consumption, Jul 1, 2022
Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, Jun 27, 2011
The effect of domestic charging of electric vehicles (EVs) on electricity demand at a national le... more The effect of domestic charging of electric vehicles (EVs) on electricity demand at a national level was addressed. A study case was created to investigate how different charging regimes (i.e. control policies) and EV-uptake levels will affect the electricity demand of Great Britain (GB) and Spain in 2030. Charging rates, battery capacities, and battery and charger efficiencies were drawn from literature. Traffic patterns were acquired from the British Department for Transport and the Spanish Ministry of Public Works. Uncontrolled, dual tariff (time-based control), dynamic price (price-based control) domestic charging regimes were defined and applied to both power systems for different EV utilization levels. The results show that for low EV utilization, the GB system would be able to cope with the increased demand that EV domestic charging would create. The Spanish system would need additional generation to cover the EV charging needs. The anticipated high EV utilization would almost double peak the demand in both countries.
ACS Sustainable Chemistry & Engineering, May 10, 2021
Aprotic lithium–oxygen (Li–O2) batteries are a prominent example of ultrahigh energy density batt... more Aprotic lithium–oxygen (Li–O2) batteries are a prominent example of ultrahigh energy density batteries. Although Li–O2 batteries hold a great potential for large-scale electrochemical energy storag...
Ekaia, Oct 19, 2021
LABURPENA: Artikulu honek Nazio Batuen 2030 Agendako Garapen Iraunkorrerako Helburuen (GIH) artea... more LABURPENA: Artikulu honek Nazio Batuen 2030 Agendako Garapen Iraunkorrerako Helburuen (GIH) artean zazpigarrena aztertzen du: biztanle ororentzat energia garbia eskuragarri izatea. Helburu hori hainbat lurraldetan inplementatzeko eta haren jarraipena egiteko bideak aztertu dira, baita zenbait autoreren arabera dituen alde onak edo potentzialtasunak eta argi-ilunak ere. Azken urteotako literaturak GIHen jarraipenari buruz zer dioen berrikusi, eta, horren ostean, 7. GIHaren ezarpena makro eskalatik mikro mailara nolakoa izaten ari den aztertu da, Europatik hasita, Euskal Autonomia Erkidegoaren (EAE) kasu konkretua ardatz gisa hartuz. Horretarako, askotariko gobernu mailetan (besteak beste, Europar Batasuna, Espainiako estatuko gobernua, Eusko Jaurlaritza, foru-aldundiak eta udalak) 7. GIHa lortze aldera zehaztu diren xede eta adierazleak alderatu dira, baita haien aniztasuna erakutsi ere, eta 2017. urtera bitartean adierazle horiek izandako bilakaera aztertu da. Azterketatik ondorioztatu da Europa mailan helburuak estandarizatu diren arren helburuok estatu-mailan eta handik beherakoetan ez dutela adierazle nahikorik ezarririko xedeen jarraipen osatua egiteko. Hala, adierazleak estandarizatzen eta datu-iturriak hobetzen jarraitzeko beharra ikusi da, hots, agerian utzi da horrek konparaketak egiteko dakartzan zailtasunak.
Journal of Industrial Ecology, Jul 28, 2022
Over the years, our oceans have witnessed an enormous accumulation of marine plastic waste result... more Over the years, our oceans have witnessed an enormous accumulation of marine plastic waste resulting from ocean‐related economic activities. As plastic pollution adversely affects marine wildlife and habitat, our society requires urgent solutions to address this increasingly alarming dilemma. Here, we turn our attention to circular economy principles to reduce the amount of nonbiodegradable petroleum‐based marine litter. We consider a production process based on 3D printing to fabricate products for the marine industry, which uses marine plastic waste as a source material. Additionally, the suitability of virgin bio‐based polyamide (bio‐PA), polylactic acid (PLA), and polyhydroxybutyrate (PHB) is explored. PHB is selected due to its extraordinary rapid biodegradation in aquatic environments. To quantify the environmental impacts of the proposed processes, a cradle‐to‐grave life cycle assessment (LCA) is applied according to ISO 14040:2006 and ISO 14044:2006 standards. Different end‐of‐life alternatives are proposed, including landfill deposition, thermal degradation, and composting. LCA results reveal that the use of marine plastic waste is environmentally preferred in comparison with bio‐PA, PLA, and PHB. Specifically, the global warming indicator, considered a prime driver toward sustainability, shows a 3.7‐fold decrease in comparison with bio‐PA. Importantly, the environmental impacts of PHB production through crude glycerol fermentation are quantified for the first time. Regarding the end‐of‐life options with a composting scenario, PLA and PHB are preferred as they yield biogenic carbon dioxide (CO2), which can be used as a renewable energy source.
ACS Sustainable Chemistry & Engineering, Jul 21, 2022
Los idiomas oficiales de esta tesis son el EUSKERA y el INGLÉS. The official languages in this th... more Los idiomas oficiales de esta tesis son el EUSKERA y el INGLÉS. The official languages in this thesis are BASQUE and ENGLISH. La presente versión, en castellano e inglés, ha sido realizada para facilitar su evaluación por el tribunal de la tesis, así como su posterior difusión. Fields of Knowledge (UNESCO codes) // Áreas de Conocimiento (códigos UNESCO):
A burned area product was generated from Landsat 8 OLI based three-month composites for the whole... more A burned area product was generated from Landsat 8 OLI based three-month composites for the whole territory of Latin America using the processing power of Google earth engine. The product covers the year 2016, and it is guided by thermal anomalies recorded by the, Suomi-NPP satellite Visible Infrared Imaging Radiometer Suite (VIIRS) sensor. The BA algorithm takes into account the spectral contrast between the fire affected areas and the unburned background, using a dedicated thresholding technique. Several spectral indices/bands were used to detect burned pixels by using the spectral signatures extracted at the hotspots. Results showed ~518K km 2 of burned areas for 2016, in comparison with the ~318K km 2 of the MODIS MCD64A1 c6 product. The comparison of the automatic method with manually obtained burned perimeters in 40 validation sites showed a very high overall accuracy. Aggregated commission and omission errors for the burned category were found below 20%. The most problematic areas were found related to the low temporal resolution of the sensor and the persistence of the cloud cover, as well as to the confusion with croplands, particularly with regards to commission errors.
Journal of Cleaner Production
Sustainable Production and Consumption
Sustainable Cities and Society
Lecture notes in mechanical engineering, 2023
Journal of Cleaner Production
Sustainable Production and Consumption
Journal of Industrial Ecology
Over the years, our oceans have witnessed an enormous accumulation of marine plastic waste result... more Over the years, our oceans have witnessed an enormous accumulation of marine plastic waste resulting from ocean‐related economic activities. As plastic pollution adversely affects marine wildlife and habitat, our society requires urgent solutions to address this increasingly alarming dilemma. Here, we turn our attention to circular economy principles to reduce the amount of nonbiodegradable petroleum‐based marine litter. We consider a production process based on 3D printing to fabricate products for the marine industry, which uses marine plastic waste as a source material. Additionally, the suitability of virgin bio‐based polyamide (bio‐PA), polylactic acid (PLA), and polyhydroxybutyrate (PHB) is explored. PHB is selected due to its extraordinary rapid biodegradation in aquatic environments. To quantify the environmental impacts of the proposed processes, a cradle‐to‐grave life cycle assessment (LCA) is applied according to ISO 14040:2006 and ISO 14044:2006 standards. Different end‐...
ACS Sustainable Chemistry & Engineering
Advanced Energy and Sustainability Research
Sodium‐ion batteries (NIBs) are key enablers of sustainable energy storage. NIBs use Earth‐abunda... more Sodium‐ion batteries (NIBs) are key enablers of sustainable energy storage. NIBs use Earth‐abundant materials and are technologically viable to replace lithium‐ion batteries in the medium term. Na3V2(PO4)3, as a popular cathode for NIBs, requires further improvements to boost its electrochemical performance, particularly regarding the rate capability and operational lifetime. These strategies involve the incorporation of carbonaceous materials, heteroatom doping, morphology modification, or biopolymer incorporation. Considering the circular economy actions to foster environmentally sustainable battery industries, there is an urgent need to disclose the environmental impacts of battery production. A cradle‐to‐gate life cycle assessment methodology is used to quantify, analyze, and compare the environmental impacts of ten representative state‐of‐the‐art Na3V2(PO4)3 cathodes. Impacts are disclosed for 18 indicators normalized to 1 kg of cathode considering laboratory‐scale approaches. ...
Lecture notes in mechanical engineering, 2024
Sustainable Production and Consumption, Jul 1, 2022
Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, Jun 27, 2011
The effect of domestic charging of electric vehicles (EVs) on electricity demand at a national le... more The effect of domestic charging of electric vehicles (EVs) on electricity demand at a national level was addressed. A study case was created to investigate how different charging regimes (i.e. control policies) and EV-uptake levels will affect the electricity demand of Great Britain (GB) and Spain in 2030. Charging rates, battery capacities, and battery and charger efficiencies were drawn from literature. Traffic patterns were acquired from the British Department for Transport and the Spanish Ministry of Public Works. Uncontrolled, dual tariff (time-based control), dynamic price (price-based control) domestic charging regimes were defined and applied to both power systems for different EV utilization levels. The results show that for low EV utilization, the GB system would be able to cope with the increased demand that EV domestic charging would create. The Spanish system would need additional generation to cover the EV charging needs. The anticipated high EV utilization would almost double peak the demand in both countries.
ACS Sustainable Chemistry & Engineering, May 10, 2021
Aprotic lithium–oxygen (Li–O2) batteries are a prominent example of ultrahigh energy density batt... more Aprotic lithium–oxygen (Li–O2) batteries are a prominent example of ultrahigh energy density batteries. Although Li–O2 batteries hold a great potential for large-scale electrochemical energy storag...
Ekaia, Oct 19, 2021
LABURPENA: Artikulu honek Nazio Batuen 2030 Agendako Garapen Iraunkorrerako Helburuen (GIH) artea... more LABURPENA: Artikulu honek Nazio Batuen 2030 Agendako Garapen Iraunkorrerako Helburuen (GIH) artean zazpigarrena aztertzen du: biztanle ororentzat energia garbia eskuragarri izatea. Helburu hori hainbat lurraldetan inplementatzeko eta haren jarraipena egiteko bideak aztertu dira, baita zenbait autoreren arabera dituen alde onak edo potentzialtasunak eta argi-ilunak ere. Azken urteotako literaturak GIHen jarraipenari buruz zer dioen berrikusi, eta, horren ostean, 7. GIHaren ezarpena makro eskalatik mikro mailara nolakoa izaten ari den aztertu da, Europatik hasita, Euskal Autonomia Erkidegoaren (EAE) kasu konkretua ardatz gisa hartuz. Horretarako, askotariko gobernu mailetan (besteak beste, Europar Batasuna, Espainiako estatuko gobernua, Eusko Jaurlaritza, foru-aldundiak eta udalak) 7. GIHa lortze aldera zehaztu diren xede eta adierazleak alderatu dira, baita haien aniztasuna erakutsi ere, eta 2017. urtera bitartean adierazle horiek izandako bilakaera aztertu da. Azterketatik ondorioztatu da Europa mailan helburuak estandarizatu diren arren helburuok estatu-mailan eta handik beherakoetan ez dutela adierazle nahikorik ezarririko xedeen jarraipen osatua egiteko. Hala, adierazleak estandarizatzen eta datu-iturriak hobetzen jarraitzeko beharra ikusi da, hots, agerian utzi da horrek konparaketak egiteko dakartzan zailtasunak.
Journal of Industrial Ecology, Jul 28, 2022
Over the years, our oceans have witnessed an enormous accumulation of marine plastic waste result... more Over the years, our oceans have witnessed an enormous accumulation of marine plastic waste resulting from ocean‐related economic activities. As plastic pollution adversely affects marine wildlife and habitat, our society requires urgent solutions to address this increasingly alarming dilemma. Here, we turn our attention to circular economy principles to reduce the amount of nonbiodegradable petroleum‐based marine litter. We consider a production process based on 3D printing to fabricate products for the marine industry, which uses marine plastic waste as a source material. Additionally, the suitability of virgin bio‐based polyamide (bio‐PA), polylactic acid (PLA), and polyhydroxybutyrate (PHB) is explored. PHB is selected due to its extraordinary rapid biodegradation in aquatic environments. To quantify the environmental impacts of the proposed processes, a cradle‐to‐grave life cycle assessment (LCA) is applied according to ISO 14040:2006 and ISO 14044:2006 standards. Different end‐of‐life alternatives are proposed, including landfill deposition, thermal degradation, and composting. LCA results reveal that the use of marine plastic waste is environmentally preferred in comparison with bio‐PA, PLA, and PHB. Specifically, the global warming indicator, considered a prime driver toward sustainability, shows a 3.7‐fold decrease in comparison with bio‐PA. Importantly, the environmental impacts of PHB production through crude glycerol fermentation are quantified for the first time. Regarding the end‐of‐life options with a composting scenario, PLA and PHB are preferred as they yield biogenic carbon dioxide (CO2), which can be used as a renewable energy source.
ACS Sustainable Chemistry & Engineering, Jul 21, 2022
Los idiomas oficiales de esta tesis son el EUSKERA y el INGLÉS. The official languages in this th... more Los idiomas oficiales de esta tesis son el EUSKERA y el INGLÉS. The official languages in this thesis are BASQUE and ENGLISH. La presente versión, en castellano e inglés, ha sido realizada para facilitar su evaluación por el tribunal de la tesis, así como su posterior difusión. Fields of Knowledge (UNESCO codes) // Áreas de Conocimiento (códigos UNESCO):
A burned area product was generated from Landsat 8 OLI based three-month composites for the whole... more A burned area product was generated from Landsat 8 OLI based three-month composites for the whole territory of Latin America using the processing power of Google earth engine. The product covers the year 2016, and it is guided by thermal anomalies recorded by the, Suomi-NPP satellite Visible Infrared Imaging Radiometer Suite (VIIRS) sensor. The BA algorithm takes into account the spectral contrast between the fire affected areas and the unburned background, using a dedicated thresholding technique. Several spectral indices/bands were used to detect burned pixels by using the spectral signatures extracted at the hotspots. Results showed ~518K km 2 of burned areas for 2016, in comparison with the ~318K km 2 of the MODIS MCD64A1 c6 product. The comparison of the automatic method with manually obtained burned perimeters in 40 validation sites showed a very high overall accuracy. Aggregated commission and omission errors for the burned category were found below 20%. The most problematic areas were found related to the low temporal resolution of the sensor and the persistence of the cloud cover, as well as to the confusion with croplands, particularly with regards to commission errors.
Journal of Cleaner Production
Sustainable Production and Consumption
Sustainable Cities and Society
Lecture notes in mechanical engineering, 2023
Journal of Cleaner Production
Sustainable Production and Consumption
Journal of Industrial Ecology
Over the years, our oceans have witnessed an enormous accumulation of marine plastic waste result... more Over the years, our oceans have witnessed an enormous accumulation of marine plastic waste resulting from ocean‐related economic activities. As plastic pollution adversely affects marine wildlife and habitat, our society requires urgent solutions to address this increasingly alarming dilemma. Here, we turn our attention to circular economy principles to reduce the amount of nonbiodegradable petroleum‐based marine litter. We consider a production process based on 3D printing to fabricate products for the marine industry, which uses marine plastic waste as a source material. Additionally, the suitability of virgin bio‐based polyamide (bio‐PA), polylactic acid (PLA), and polyhydroxybutyrate (PHB) is explored. PHB is selected due to its extraordinary rapid biodegradation in aquatic environments. To quantify the environmental impacts of the proposed processes, a cradle‐to‐grave life cycle assessment (LCA) is applied according to ISO 14040:2006 and ISO 14044:2006 standards. Different end‐...
ACS Sustainable Chemistry & Engineering
Advanced Energy and Sustainability Research
Sodium‐ion batteries (NIBs) are key enablers of sustainable energy storage. NIBs use Earth‐abunda... more Sodium‐ion batteries (NIBs) are key enablers of sustainable energy storage. NIBs use Earth‐abundant materials and are technologically viable to replace lithium‐ion batteries in the medium term. Na3V2(PO4)3, as a popular cathode for NIBs, requires further improvements to boost its electrochemical performance, particularly regarding the rate capability and operational lifetime. These strategies involve the incorporation of carbonaceous materials, heteroatom doping, morphology modification, or biopolymer incorporation. Considering the circular economy actions to foster environmentally sustainable battery industries, there is an urgent need to disclose the environmental impacts of battery production. A cradle‐to‐gate life cycle assessment methodology is used to quantify, analyze, and compare the environmental impacts of ten representative state‐of‐the‐art Na3V2(PO4)3 cathodes. Impacts are disclosed for 18 indicators normalized to 1 kg of cathode considering laboratory‐scale approaches. ...