Energy and Environment Focus最新文献_第2页

Nitrogen Dioxide Gas Sensing Properties of Nanocrystalline In2O3 Thick Films for Environmental Protection 环保用纳米晶In2O3厚膜二氧化氮气敏性能研究

Energy and Environment Focus Pub Date : 2023-03-01 DOI: 10.1166/eef.2023.1261

S. Kulkarni, D. K. Halwar

{"title":"Nitrogen Dioxide Gas Sensing Properties of Nanocrystalline In2O3 Thick Films for Environmental Protection","authors":"S. Kulkarni, D. K. Halwar","doi":"10.1166/eef.2023.1261","DOIUrl":"https://doi.org/10.1166/eef.2023.1261","url":null,"abstract":"The Sol–gel method was utilised to synthesise the nanocrystalline In2O3 powder with a cubic structure in the current study. Thick film samples of In2O3 powder were prepared on an alumina substrate. A low-cost and straightforward screen-printing\u0000 method was used for making the film samples. The prepared samples were subjugated to firing at different temperatures in a range of 700 to 850 °C with 50 °C increment. This temperature range assured much better adhesion of films on the alumina substrate. The X-ray diffraction (XRD)\u0000 study revealed the cubic phase along (222) orientation. The electrical characterization study confirmed the n-type semiconducting nature of the film samples. The film samples fired at 700 °C showed a relatively low resistivity compared to those fired at different temperatures. The particle\u0000 size was found small with an enormous surface area. The morphology study using scanning electron microscopy (SEM) showed that the particle size also increased as the firing temperature was increased. Film samples fired at 700 °C were also exhibited higher sensitivity and selectivity for\u0000 nitrogen dioxide gas of 100 ppm concentration at 100 °C operating temperature.","PeriodicalId":11683,"journal":{"name":"Energy and Environment Focus","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87373924","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}

引用次数: 0

Performance Analysis of Solar Assisted Ground Source Heat Pump to Supply Heating Load and Domestic Hot Water 太阳能辅助地源热泵供热负荷和生活热水的性能分析

Energy and Environment Focus Pub Date : 2023-03-01 DOI: 10.1166/eef.2023.1272

Ahleme Berkane, A. Mounir, Z. Aouachria

{"title":"Performance Analysis of Solar Assisted Ground Source Heat Pump to Supply Heating Load and Domestic Hot Water","authors":"Ahleme Berkane, A. Mounir, Z. Aouachria","doi":"10.1166/eef.2023.1272","DOIUrl":"https://doi.org/10.1166/eef.2023.1272","url":null,"abstract":"Algeria’s geographical location offers several advantages related to the extensive use of renewable energy sources such as solar and geothermal. Owing to the vast Algerian territory, the need for isolated areas to be supplied with energy by autonomous systems using sustainable\u0000 energy. In this study, we propose a hybrid renewable energy system to provide heating systems for residential buildings and domestic hot water (DHW). Four different solar-assisted ground source heat pump (SAGSHP) combinations are being studied, with the aim of satisfying the energy needs of\u0000 a building located in Batna, Algeria. The TRNSYS software allowed us to study the different effects of the parameters on their performance. It turned out that a 7.7 kW ground source heat pump system combined with flat solar collectors is a feasible choice that satisfies our objective. The\u0000 extreme annual average values of the heat pump coefficient of performance (COP) obtained are 3.48 and 4.55. In the system, with recharging the borehole, the net energy extracted from the ground is decreased by 30.4% compared to the reference case (GSHP). This can reduce the ground thermal\u0000 imbalance problem, which positively affects the stability of the operational system.","PeriodicalId":11683,"journal":{"name":"Energy and Environment Focus","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82586836","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}

引用次数: 0

Performance Investigation of Solar Chimney Power Plants in Algeria’s Desert Regions 阿尔及利亚沙漠地区太阳能烟囱电厂的性能调查

Energy and Environment Focus Pub Date : 2023-03-01 DOI: 10.1166/eef.2023.1274

Sellami Ali, B. Djaouida

引用次数: 0

Thin Multilayer of Graphene as an Alternative to Indium Tin Oxide (ITO) in Touchscreens and Wearable Electronics 多层石墨烯作为氧化铟锡(ITO)在触摸屏和可穿戴电子产品中的替代品

Energy and Environment Focus Pub Date : 2023-03-01 DOI: 10.1166/eef.2023.1273

Syed Rayyan Hydri, K. Subramanian, R. George

{"title":"Thin Multilayer of Graphene as an Alternative to Indium Tin Oxide (ITO) in Touchscreens and Wearable Electronics","authors":"Syed Rayyan Hydri, K. Subramanian, R. George","doi":"10.1166/eef.2023.1273","DOIUrl":"https://doi.org/10.1166/eef.2023.1273","url":null,"abstract":"Along with achieving great technological advances, graphene has achieved a great amount of popularity and interest from the world of science because of its enhanced physical, mechanical and thermal properties. The research output on graphene and its applications in various fields will\u0000 be more. This investigation focusses on the fundamental aspects of graphene, which are exploring the flexible touch screens such as Smart Phones, Ipad, Smart TV. The effect of these results of new graphene displays are discussed. With the aid of experimental techniques involving pre-surface\u0000 treatment, adhesion promoters, graphene layer thickness and theoretical modelling using Comsol, results are achieved. Different parameters were studied such as pre-cleaning time of the glass, weight of graphene in the graphene-ethanol suspension, use of adhesion promoter such as PMMA. It was\u0000 found that optimum parameters are longer cleaning times (15 minutes), lower graphene weights (<0.032 g) and use of PMMA. In the modelling, layer by layer embedding of graphene over a glass substrate was analysed. Different characteristics were studied such as optical transparency, adhesion\u0000 and electrical resistivity. Modelling of graphene over glass gave the results that layer thickness needs to be optimized with lower layer thickness (<2 * 10−5 cm) being better.","PeriodicalId":11683,"journal":{"name":"Energy and Environment Focus","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81023699","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}

引用次数: 0

Light Vehicles: Policies for Reducing Their Energy Use and Environmental Impacts 轻型车辆:减少能源使用和环境影响的政策

Energy and Environment Focus Pub Date : 2021-10-15 DOI: 10.4324/9780429337031-10

M. Ledbetter, M. Ross

引用次数: 0

Policy for Energy and Sustainable Development 能源和可持续发展政策

Energy and Environment Focus Pub Date : 2021-10-15 DOI: 10.4324/9780429337031-12

M. Munasinghe

引用次数: 0

The Social Costs of Electricity Generation: Wind and Photovoltaic vs. Fossil and Nuclear Energy 发电的社会成本:风能和光伏与化石能源和核能

Energy and Environment Focus Pub Date : 2021-10-15 DOI: 10.4324/9780429337031-9

O. Hohmeyer

引用次数: 0

Toward a Political Economy of Global Change: Energy, Environment and Development in the Greenhouse 走向全球变化的政治经济学:温室中的能源、环境与发展

Energy and Environment Focus Pub Date : 2021-10-15 DOI: 10.4324/9780429337031-13

J. Byrne, D. Rich

引用次数: 0

Fueling the Illusion of Progress: Energy and Industrialization in the European Experience 助长进步的幻觉:欧洲经验中的能源与工业化

Energy and Environment Focus Pub Date : 2021-10-15 DOI: 10.4324/9780429337031-6

D. Greenberg

引用次数: 0

The Neglected Challenge: Energy, Economic Growth and Environmental Protection in the Industrial History of the U.S. 被忽视的挑战:美国工业历史中的能源、经济增长和环境保护

Energy and Environment Focus Pub Date : 2021-10-15 DOI: 10.4324/9780429337031-5

M. Melosi

引用次数: 0