Pub Date : 2021-01-01DOI: 10.4018/ijesgt.20210101.oa1
J. J. P. Bueno, Esmeralda Reséndiz Rojas, Jorge Morales Hernández, Maria Luisa Mendoza López, Rufino Alberto Chávez Esquivel
Solar thermal energy can be captured on absorbent surfaces, but coatings tend to deteriorate, due to changes in hue, thermal shocks, or detachment of all layers. There is a great challenge in reducing the deterioration because of environmental factors such as corrosion, impact, and dust control, among others. The absorbent coatings interact with the incident solar radiation transforming it as heat energy, and selectivity allows a low emissivity. In this work, a three-layer system on copper is proposed. An anodized CuO or black copper layer as an absorbent with high absorptance is proposed. A protective layer was added to extend the lifetime of use while preserving the functional characteristics of the absorbent black layer by using SiO2 deposited by atmospheric pressure plasma jet (APPJ) using hexamethyldisiloxane. A selective layer of aluminum was deposited by physical vapor deposition (PVD). Thermal shocks were applied by concentrated solar power with a Fresnel lens to represent sudden temperature changes in the radiation absorbent when the weather changes.
{"title":"Copper Black Coatings for the Absorption of Solar Concentration With an APPJ SiO2 Super-Hydrophobic Protection","authors":"J. J. P. Bueno, Esmeralda Reséndiz Rojas, Jorge Morales Hernández, Maria Luisa Mendoza López, Rufino Alberto Chávez Esquivel","doi":"10.4018/ijesgt.20210101.oa1","DOIUrl":"https://doi.org/10.4018/ijesgt.20210101.oa1","url":null,"abstract":"Solar thermal energy can be captured on absorbent surfaces, but coatings tend to deteriorate, due to changes in hue, thermal shocks, or detachment of all layers. There is a great challenge in reducing the deterioration because of environmental factors such as corrosion, impact, and dust control, among others. The absorbent coatings interact with the incident solar radiation transforming it as heat energy, and selectivity allows a low emissivity. In this work, a three-layer system on copper is proposed. An anodized CuO or black copper layer as an absorbent with high absorptance is proposed. A protective layer was added to extend the lifetime of use while preserving the functional characteristics of the absorbent black layer by using SiO2 deposited by atmospheric pressure plasma jet (APPJ) using hexamethyldisiloxane. A selective layer of aluminum was deposited by physical vapor deposition (PVD). Thermal shocks were applied by concentrated solar power with a Fresnel lens to represent sudden temperature changes in the radiation absorbent when the weather changes.","PeriodicalId":150300,"journal":{"name":"International Journal of Environmental Sustainability and Green Technologies","volume":"519 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132704139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-01DOI: 10.4018/ijesgt.2020070103
J. Nyika
Climate change is a growing challenge to socio-economic development and sustainable environmental management worldwide. Developing countries with low adaptive capacity and high vulnerability to the phenomena are affected severely. This study assessed the climate change situation in a developing country, its effects on the water sector and adaptive responses to improve climate change resilience using Kenya as a case study. Findings showed that Kenya is experiencing temperature and rainfall rises currently, and future projections showed an even worse situation. Climate variability and change however differed based on time and space. Highlighted effects on the water sector included fluctuations in its quantities and deterioration of its quality. Adaptive responses such as infrastructural modifications of water body environments, forecasting using models to predict climate change uncertainties and disseminating early warnings are discussed. Their success relies on strong policy and institutions to steer their implementation in Kenya.
{"title":"Climate Change Situation in Kenya and Measures Towards Adaptive Management in the Water Sector","authors":"J. Nyika","doi":"10.4018/ijesgt.2020070103","DOIUrl":"https://doi.org/10.4018/ijesgt.2020070103","url":null,"abstract":"Climate change is a growing challenge to socio-economic development and sustainable environmental management worldwide. Developing countries with low adaptive capacity and high vulnerability to the phenomena are affected severely. This study assessed the climate change situation in a developing country, its effects on the water sector and adaptive responses to improve climate change resilience using Kenya as a case study. Findings showed that Kenya is experiencing temperature and rainfall rises currently, and future projections showed an even worse situation. Climate variability and change however differed based on time and space. Highlighted effects on the water sector included fluctuations in its quantities and deterioration of its quality. Adaptive responses such as infrastructural modifications of water body environments, forecasting using models to predict climate change uncertainties and disseminating early warnings are discussed. Their success relies on strong policy and institutions to steer their implementation in Kenya.","PeriodicalId":150300,"journal":{"name":"International Journal of Environmental Sustainability and Green Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130758030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.4018/ijesgt.2020010104
José G. Vargas-Hernández, Karina Pallagst
This article analyzes the elements of urban green innovation based on the public interest, decentralizing the infrastructure to democratize the territory and innovating the institutional design to address the complexity of the challenges in cities. The method employed is the critical analysis supported by a review of the literature and consulting experts in the field. It is concluded that the urban green innovation capacity planning has a critical role in urban innovation development in specific areas of economic growth, social inclusion and equality, environmental sustainability, health, education, business, etc. To achieve these aims the propose actions are required.
{"title":"Urban Green Innovation","authors":"José G. Vargas-Hernández, Karina Pallagst","doi":"10.4018/ijesgt.2020010104","DOIUrl":"https://doi.org/10.4018/ijesgt.2020010104","url":null,"abstract":"This article analyzes the elements of urban green innovation based on the public interest, decentralizing the infrastructure to democratize the territory and innovating the institutional design to address the complexity of the challenges in cities. The method employed is the critical analysis supported by a review of the literature and consulting experts in the field. It is concluded that the urban green innovation capacity planning has a critical role in urban innovation development in specific areas of economic growth, social inclusion and equality, environmental sustainability, health, education, business, etc. To achieve these aims the propose actions are required.","PeriodicalId":150300,"journal":{"name":"International Journal of Environmental Sustainability and Green Technologies","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125659034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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