Pub Date : 2023-09-14DOI: 10.1177/0958305x231201535
Tiantian Yang, Lan Yi, Jing Li, Qingquan Liang
The Chinese government has emphasized the necessity of synergistic control for carbon abatement and pollution reduction in the protection of eco-environment, as part of the 14th Five-Year Plan and the Long-range Objectives Through the Year 2035. As an important tool to reduce CO 2 , the carbon market can also affect the air pollution synergistically. The study utilizes the multi-period difference-in-difference (DID) model to analyze the impact of carbon market on carbon abatement, as well as the synergistic effect on different air pollutants. The study analyzes the mechanisms for carbon market to achieve synergistic control from the perspectives of “quantity” and “category” comprehensively. The findings indicate that: (1) carbon markets can reduce CO 2 significantly, with a synergistic effect mainly observed on SO 2 and soot (dust). These results remain robust when focusing on the industrial sector or adopting the PSM-DID estimation, etc.; (2) the mechanisms to achieve synergistic control vary among different air pollutants. Promotion of technology can only synergistically reduce SO 2 . Optimization of energy consumption structure is the top priority for reducing CO 2 . The most effective mechanism to achieve synergistic control of air pollutants is improvement of energy utilization efficiency; (3) to achieve synergistic control goals, the Chinese national market should prioritize industries that release both CO 2 and NOx in the rolling-out plan, enrich the trading tools, and formulate effective price signals.
{"title":"Have the pilot carbon markets achieved synergistic control of carbon abatement and pollution reduction? The quasi-experimental evidence from China","authors":"Tiantian Yang, Lan Yi, Jing Li, Qingquan Liang","doi":"10.1177/0958305x231201535","DOIUrl":"https://doi.org/10.1177/0958305x231201535","url":null,"abstract":"The Chinese government has emphasized the necessity of synergistic control for carbon abatement and pollution reduction in the protection of eco-environment, as part of the 14th Five-Year Plan and the Long-range Objectives Through the Year 2035. As an important tool to reduce CO 2 , the carbon market can also affect the air pollution synergistically. The study utilizes the multi-period difference-in-difference (DID) model to analyze the impact of carbon market on carbon abatement, as well as the synergistic effect on different air pollutants. The study analyzes the mechanisms for carbon market to achieve synergistic control from the perspectives of “quantity” and “category” comprehensively. The findings indicate that: (1) carbon markets can reduce CO 2 significantly, with a synergistic effect mainly observed on SO 2 and soot (dust). These results remain robust when focusing on the industrial sector or adopting the PSM-DID estimation, etc.; (2) the mechanisms to achieve synergistic control vary among different air pollutants. Promotion of technology can only synergistically reduce SO 2 . Optimization of energy consumption structure is the top priority for reducing CO 2 . The most effective mechanism to achieve synergistic control of air pollutants is improvement of energy utilization efficiency; (3) to achieve synergistic control goals, the Chinese national market should prioritize industries that release both CO 2 and NOx in the rolling-out plan, enrich the trading tools, and formulate effective price signals.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135553057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-12DOI: 10.1177/0958305x231196127
Qiang Wang, Xinchen Cheng, Rongrong Li
In order to better understand the digital economy on carbon emissions, the intermediary effect model based on technological innovation and the panel threshold model based on trade openness and energy intensity are used to study the relationship between the digital economy and carbon emissions in G7 countries. In addition, a quantile regression analysis on the impact of the digital economy under different carbon emission levels is also conducted. The empirical results show that: (i) the digital economy has a significant inhibitory effect on per capita carbon emissions. (ii) The mechanism analysis shows that the digital economy can indirectly affect per capita carbon emissions by affecting technological innovation. (iii) The threshold effect of trade openness and energy intensity is significant. Under high openness and low energy intensity, the digital economy has a stronger inhibitory effect on per capita carbon emissions. (iv) The quantile regression results show that the carbon emission reduction effect of the digital economy is greater at the low-carbon emission level.
{"title":"Does the digital economy reduce carbon emissions? The role of technological innovation and trade openness","authors":"Qiang Wang, Xinchen Cheng, Rongrong Li","doi":"10.1177/0958305x231196127","DOIUrl":"https://doi.org/10.1177/0958305x231196127","url":null,"abstract":"In order to better understand the digital economy on carbon emissions, the intermediary effect model based on technological innovation and the panel threshold model based on trade openness and energy intensity are used to study the relationship between the digital economy and carbon emissions in G7 countries. In addition, a quantile regression analysis on the impact of the digital economy under different carbon emission levels is also conducted. The empirical results show that: (i) the digital economy has a significant inhibitory effect on per capita carbon emissions. (ii) The mechanism analysis shows that the digital economy can indirectly affect per capita carbon emissions by affecting technological innovation. (iii) The threshold effect of trade openness and energy intensity is significant. Under high openness and low energy intensity, the digital economy has a stronger inhibitory effect on per capita carbon emissions. (iv) The quantile regression results show that the carbon emission reduction effect of the digital economy is greater at the low-carbon emission level.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135878629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-11DOI: 10.1177/0958305x231200573
Silu Chen, Chenling Tian, Xia Jiang, Jiaxin Lai
Although environmental regulations are effective forces to conduct green innovation, the existing research has not yet reached a consensus on the relationship between environmental regulations and enterprise green innovation. The objective of this study is to explore the influence mechanism of environmental regulations (i.e., market-based and command-based) on enterprise green innovation from the perspective of social information processing theory and regulatory focus theory. A time-lagged survey based on a Chinese sample of 184 firms supports the hypothesized moderated mediation model. The results show that (a) environmental regulations positively impact enterprise green innovation; (b) top management team (TMT) harmonious environmental passion climate fully mediates the relationship between market-based environmental regulation and enterprise green innovation, while TMT environmental performance anxiety climate partially mediates the relationship between command-based environmental regulation and enterprise green innovation; (3) chief executive officer (CEO) promotion regulatory focus moderates the positive impact of TMT harmonious environmental passion climate on enterprise green innovation, and CEO prevention regulatory focus moderates the positive impact of TMT environmental performance anxiety climate on enterprise green innovation. These findings extend the green innovation literature on how and when environmental regulations affect enterprise green innovation.
{"title":"A dual-path model: Bridge between heterogeneous environmental regulations and enterprise green innovation","authors":"Silu Chen, Chenling Tian, Xia Jiang, Jiaxin Lai","doi":"10.1177/0958305x231200573","DOIUrl":"https://doi.org/10.1177/0958305x231200573","url":null,"abstract":"Although environmental regulations are effective forces to conduct green innovation, the existing research has not yet reached a consensus on the relationship between environmental regulations and enterprise green innovation. The objective of this study is to explore the influence mechanism of environmental regulations (i.e., market-based and command-based) on enterprise green innovation from the perspective of social information processing theory and regulatory focus theory. A time-lagged survey based on a Chinese sample of 184 firms supports the hypothesized moderated mediation model. The results show that (a) environmental regulations positively impact enterprise green innovation; (b) top management team (TMT) harmonious environmental passion climate fully mediates the relationship between market-based environmental regulation and enterprise green innovation, while TMT environmental performance anxiety climate partially mediates the relationship between command-based environmental regulation and enterprise green innovation; (3) chief executive officer (CEO) promotion regulatory focus moderates the positive impact of TMT harmonious environmental passion climate on enterprise green innovation, and CEO prevention regulatory focus moderates the positive impact of TMT environmental performance anxiety climate on enterprise green innovation. These findings extend the green innovation literature on how and when environmental regulations affect enterprise green innovation.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136024410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1177/0958305X221091541
V. Sharma, H. Dhasmana, A. Verma, Avshish Kumar, C.V. Kannan, Yash Pal, Shivangi Jha, V. Jain
An investigation on enhanced surface passivation in the existing industrial process line of large area n-type silicon (Si) Passivated Emitter Rear Totally diffused (n- PERT) solar cell has been performed. The Rapid Thermal Process (RTP) optimization for 20 min is conducted in the temperature range of 500–900°C and device evaluation is carried out with respect to regularly processed n-PERT solar cell. The impact of pre-metallization annealing is studied with the support of cell parameters like shunt resistance, reverse saturation current density determined from current-voltage measurements. The enhanced surface passivation via hydrogenation from silicon nitride (SiNx) layer during annealing is established with the help of external quantum efficiency, spectral response measurements and Fourier transform infrared spectroscopy analysis. The addition of optimized annealing resulted in improvement by 550% (from 38 to 247 µs), 7.73% (from 630.7 to 678.8 mV) and 84.77% (from 223.3 to 34 cm/s) in effective minority carrier lifetime, implied open circuit voltage and surface recombination velocity respectively. Finally, RTP technique for optimized process line has been successfully incorporated in industrial high-volume batch of 140898 CZ n-type Si wafers, which predicts conceptual validation of the study in mass scale production line with an increment in average efficiency of the device by 0.35%.
{"title":"A study on passivation improvement in n-passivated emitter rear totally diffused solar cell using rapid thermal annealing","authors":"V. Sharma, H. Dhasmana, A. Verma, Avshish Kumar, C.V. Kannan, Yash Pal, Shivangi Jha, V. Jain","doi":"10.1177/0958305X221091541","DOIUrl":"https://doi.org/10.1177/0958305X221091541","url":null,"abstract":"An investigation on enhanced surface passivation in the existing industrial process line of large area n-type silicon (Si) Passivated Emitter Rear Totally diffused (n- PERT) solar cell has been performed. The Rapid Thermal Process (RTP) optimization for 20 min is conducted in the temperature range of 500–900°C and device evaluation is carried out with respect to regularly processed n-PERT solar cell. The impact of pre-metallization annealing is studied with the support of cell parameters like shunt resistance, reverse saturation current density determined from current-voltage measurements. The enhanced surface passivation via hydrogenation from silicon nitride (SiNx) layer during annealing is established with the help of external quantum efficiency, spectral response measurements and Fourier transform infrared spectroscopy analysis. The addition of optimized annealing resulted in improvement by 550% (from 38 to 247 µs), 7.73% (from 630.7 to 678.8 mV) and 84.77% (from 223.3 to 34 cm/s) in effective minority carrier lifetime, implied open circuit voltage and surface recombination velocity respectively. Finally, RTP technique for optimized process line has been successfully incorporated in industrial high-volume batch of 140898 CZ n-type Si wafers, which predicts conceptual validation of the study in mass scale production line with an increment in average efficiency of the device by 0.35%.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"32 1","pages":"1770 - 1786"},"PeriodicalIF":4.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139343346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1177/0958305X221102048
Ardie Septian, Jiyeon Choi, Won Sik Shin
Ni2+- and Zn2+-contaminated groundwater in the coastal regions is a serious threat to water security in industrial areas. Apatite-like material is an excellent sorbent for heavy metals; however the effect of salinity on the Ni2+ and Zn2+ adsorption onto fishbone and synthesized hydroxyapatite (HAP) has not been investigated. This study investigates the effect of salinity on the single and binary adsorption of Ni2+ and Zn2+ onto apatite-like materials. The experiments were conducted in batch reactor for 24 h at 1:40 solid-to-liquid ratios (wt/wt), 25°C, and pH 5. Freundlich, Langmuir, and Dubinin–Radushkevich models fit well with the single-adsorption data. The adsorption isotherms were nonlinear (NF = 0.350–0.710). The maximum adsorption capacities (qmL) of the Ni2+ and Zn2+ onto HAP were higher than those onto the fishbone, attributed to the higher Brunauer–Emmett–Teller surface area (ABET) and cation exchange capacity. In the binary adsorption, adsorption capacities of the adsorbents were less than those in the single-solute system due to the competition between Ni2+ and Zn2+. Salinity affected the single and binary adsorption by decreasing the adsorption capacities of the adsorbents. In a binary adsorption system, the selectivity of Zn2+ was less than that of Ni2+ for both fishbone and HAP at 0‰ and 30‰ salinity, respectively. Binary adsorption models, such as the Murali–Aylmore (M–A) model, competitive Langmuir model (CLM), P-factor model, and ideal-adsorbed solution theory coupled with the Freundlich (IAST-Freundlich) model were used; of these, the M–A model provided the best prediction for the binary system.
{"title":"Removal of Ni2+ and Zn2+ from groundwater by adsorption onto fishbone and hydroxyapatite: Effect of salinity","authors":"Ardie Septian, Jiyeon Choi, Won Sik Shin","doi":"10.1177/0958305X221102048","DOIUrl":"https://doi.org/10.1177/0958305X221102048","url":null,"abstract":"Ni2+- and Zn2+-contaminated groundwater in the coastal regions is a serious threat to water security in industrial areas. Apatite-like material is an excellent sorbent for heavy metals; however the effect of salinity on the Ni2+ and Zn2+ adsorption onto fishbone and synthesized hydroxyapatite (HAP) has not been investigated. This study investigates the effect of salinity on the single and binary adsorption of Ni2+ and Zn2+ onto apatite-like materials. The experiments were conducted in batch reactor for 24 h at 1:40 solid-to-liquid ratios (wt/wt), 25°C, and pH 5. Freundlich, Langmuir, and Dubinin–Radushkevich models fit well with the single-adsorption data. The adsorption isotherms were nonlinear (NF = 0.350–0.710). The maximum adsorption capacities (qmL) of the Ni2+ and Zn2+ onto HAP were higher than those onto the fishbone, attributed to the higher Brunauer–Emmett–Teller surface area (ABET) and cation exchange capacity. In the binary adsorption, adsorption capacities of the adsorbents were less than those in the single-solute system due to the competition between Ni2+ and Zn2+. Salinity affected the single and binary adsorption by decreasing the adsorption capacities of the adsorbents. In a binary adsorption system, the selectivity of Zn2+ was less than that of Ni2+ for both fishbone and HAP at 0‰ and 30‰ salinity, respectively. Binary adsorption models, such as the Murali–Aylmore (M–A) model, competitive Langmuir model (CLM), P-factor model, and ideal-adsorbed solution theory coupled with the Freundlich (IAST-Freundlich) model were used; of these, the M–A model provided the best prediction for the binary system.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"17 1","pages":"1867 - 1883"},"PeriodicalIF":4.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139346732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.1177/0958305X221088113
S. Hussain, W. Jamshed, Rabia Safdar, F. Shahzad, N. M. Mohd Nasir, I. Ullah
Solar collectors absorb solar radiation at the focus of solar concentrating systems as heat energy which is further transferred to nanofluid. Entropy creation in Maxwell nanofluid flow over an infinite horizontal surface of a porous media is the subject of the current investigation. A non-linear stretching surface then induces a parabolic trough solar collector (PTSC) flow. The thermal boundary layer is studied using a modified version of Buongiorno's Model. As a result, the PDEs, which encompass the physical aspects of the issue, must be transformed into solvable and boundary-constrained ODEs. By using a proper similarity transformation, boundary conditions and partial differential expressions are reduced to a set of non-linear ordinary differential equations. The Keller box method is used to find approximate solutions to ODEs. Tests are carried out on a nanofluid known as Copper-engine oil (Cu-EO). The Nusselt number was lowered, but the skin friction coefficient was increased as a result of a substantial magnetic parameter. In addition, Reynolds number and Brinkman number are used to measure fluctuations in viscosity, and, as a result, entropy variations throughout the domain are increased. Temperature decreased due to chemical reaction and Schmidt number, while thermal radiation increased skin friction and Nusselt. According to the current analysis, the heat collector has enhanced PTSC with Maxwell nanofluid.
{"title":"Chemical reaction and thermal characteristiecs of Maxwell nanofluid flow-through solar collector as a potential solar energy cooling application: A modified Buongiorno's model","authors":"S. Hussain, W. Jamshed, Rabia Safdar, F. Shahzad, N. M. Mohd Nasir, I. Ullah","doi":"10.1177/0958305X221088113","DOIUrl":"https://doi.org/10.1177/0958305X221088113","url":null,"abstract":"Solar collectors absorb solar radiation at the focus of solar concentrating systems as heat energy which is further transferred to nanofluid. Entropy creation in Maxwell nanofluid flow over an infinite horizontal surface of a porous media is the subject of the current investigation. A non-linear stretching surface then induces a parabolic trough solar collector (PTSC) flow. The thermal boundary layer is studied using a modified version of Buongiorno's Model. As a result, the PDEs, which encompass the physical aspects of the issue, must be transformed into solvable and boundary-constrained ODEs. By using a proper similarity transformation, boundary conditions and partial differential expressions are reduced to a set of non-linear ordinary differential equations. The Keller box method is used to find approximate solutions to ODEs. Tests are carried out on a nanofluid known as Copper-engine oil (Cu-EO). The Nusselt number was lowered, but the skin friction coefficient was increased as a result of a substantial magnetic parameter. In addition, Reynolds number and Brinkman number are used to measure fluctuations in viscosity, and, as a result, entropy variations throughout the domain are increased. Temperature decreased due to chemical reaction and Schmidt number, while thermal radiation increased skin friction and Nusselt. According to the current analysis, the heat collector has enhanced PTSC with Maxwell nanofluid.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"46 1","pages":"1409 - 1432"},"PeriodicalIF":4.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90553891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.1177/0958305X221088569
Mohamed El Amine Dahou, Mohammed Hadj Kouider, Siham Dehmani, A. Habchi, Said Slimani
The present research focuses on the experimental study of the effect of alkaline pretreatment with NaOH on biogas production. Different concentrations of NaOH, i.e. 1, 2.5 and 5% (w/w), were tested on the lagoon station's sludge (dry basis) at room temperature for 24 h. The results obtained after 60 days of digestion, through the cumulative volume of biogas recorded, clearly indicate a positive effect of the chemical alkaline pretreatment on the anaerobic digestion since the amount of biogas produced increased by 42.6% when the NaOH concentration was close to 2.5%. This concentration is considered optimal under the chosen conditions. Indeed, inhibition of the methanogenic activity and a blockage of the digestion process are observed beyond this concentration. These results suggest that the alkaline pretreatment can improve the energy efficiency of the obtained biogas (CH4 content) and reduce the residence time.
{"title":"Experimental Study of Increase of Biogas Production from Lagoon Station's Sludge by Alkaline Pretreatment","authors":"Mohamed El Amine Dahou, Mohammed Hadj Kouider, Siham Dehmani, A. Habchi, Said Slimani","doi":"10.1177/0958305X221088569","DOIUrl":"https://doi.org/10.1177/0958305X221088569","url":null,"abstract":"The present research focuses on the experimental study of the effect of alkaline pretreatment with NaOH on biogas production. Different concentrations of NaOH, i.e. 1, 2.5 and 5% (w/w), were tested on the lagoon station's sludge (dry basis) at room temperature for 24 h. The results obtained after 60 days of digestion, through the cumulative volume of biogas recorded, clearly indicate a positive effect of the chemical alkaline pretreatment on the anaerobic digestion since the amount of biogas produced increased by 42.6% when the NaOH concentration was close to 2.5%. This concentration is considered optimal under the chosen conditions. Indeed, inhibition of the methanogenic activity and a blockage of the digestion process are observed beyond this concentration. These results suggest that the alkaline pretreatment can improve the energy efficiency of the obtained biogas (CH4 content) and reduce the residence time.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"7 1","pages":"1492 - 1508"},"PeriodicalIF":4.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80974246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.1177/0958305X221083240
B. Gyamfi, T. Adebayo, F. Bekun, M. Agboola
Along with the increasing aging population (AP) and global interconnectedness in the Mediterranean bloc comes climate change issues faced by the Mediterranean region in its trajectory to energy security and sustainable development. To meet the continuous energy consumption demand while cutting down natural resources extraction and exploitation with a view to minimizing environmental impacts, the policy structure in these countries may require readjustment, which is the motivation for the present study. This study advances a strategic framework for investigating the impact of natural resources rent as well as aging reliance on carbon emissions in the Mediterranean region for the annual frequency data from 1990–2016. Using quantile regression to analyze the highlighted variables, empirical results shows that both income and natural resources rent have an inverted U-Shaped connection with CO2 emission, which affirms the Environmental Kuznets Curve (EKC) hypothesis. Subsequently, globalization and energy use show a positive relationship with emissions while AP is negatively correlated with emissions. Depending on the outcomes of this analysis, a multi-stage Sustainable Development Goal (SDG) framework has been developed and SDG- 7, SDG -13 as well as SDG-8 were examined in this context. While these three SDGs are the main targets of the study, the SDG System has also provided a way to test other SDGs.
{"title":"Sterling insights into natural resources intensification, ageing population and globalization on environmental status in Mediterranean countries","authors":"B. Gyamfi, T. Adebayo, F. Bekun, M. Agboola","doi":"10.1177/0958305X221083240","DOIUrl":"https://doi.org/10.1177/0958305X221083240","url":null,"abstract":"Along with the increasing aging population (AP) and global interconnectedness in the Mediterranean bloc comes climate change issues faced by the Mediterranean region in its trajectory to energy security and sustainable development. To meet the continuous energy consumption demand while cutting down natural resources extraction and exploitation with a view to minimizing environmental impacts, the policy structure in these countries may require readjustment, which is the motivation for the present study. This study advances a strategic framework for investigating the impact of natural resources rent as well as aging reliance on carbon emissions in the Mediterranean region for the annual frequency data from 1990–2016. Using quantile regression to analyze the highlighted variables, empirical results shows that both income and natural resources rent have an inverted U-Shaped connection with CO2 emission, which affirms the Environmental Kuznets Curve (EKC) hypothesis. Subsequently, globalization and energy use show a positive relationship with emissions while AP is negatively correlated with emissions. Depending on the outcomes of this analysis, a multi-stage Sustainable Development Goal (SDG) framework has been developed and SDG- 7, SDG -13 as well as SDG-8 were examined in this context. While these three SDGs are the main targets of the study, the SDG System has also provided a way to test other SDGs.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"3 1","pages":"1471 - 1491"},"PeriodicalIF":4.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89516044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-22DOI: 10.1177/0958305X231183687
Vetrivel Kumar Kandasamy, S. Jaganathan, Ratchagaraja Dhairiyasamy, S. Rajendran
The emission of greenhouse gases is widely acknowledged as the primary driver of global warming. The adoption of renewable energy sources is paramount to address the dependence on fossil fuels, which contribute significantly to this issue and account for 84.3% of current energy production. Solar thermal energy stands out as a prominent option, representing 54.1% of the world's solar energy derived from solar collectors. However, solar thermal energy encounters challenge due to the suboptimal thermal properties of the liquids used in these collectors. Incorporating particles into the liquids offers a potential solution to enhance absorption and thermal properties. Nanofluids, formed by reducing solid particles to nanoscale dimensions, provide an avenue for improvement. This study aimed to produce an Ag nanofluid through mechanical exfoliation and assess its impact on radiation absorption compared to a GO nanofluid. Under a simulated power of 1 unit, the Ag nanofluid demonstrated temperature differences of 4 to 7°C, while pure water showed no significant deviation. Moreover, the evaporation efficiency of the Ag nanofluid reached up to 40.8% for concentrations of 200 and 500 ppm, compared to 28.6% for pure water. These findings highlight the potential of Ag nanofluid as a promising option for direct absorption solar collectors, owing to its cost-effectiveness, low toxicity, and similar benefits to graphene. Incorporating nanofluids, particularly the Ag nanofluid produced through mechanical exfoliation, can significantly enhance the efficiency of direct absorption solar collectors.
{"title":"Optimizing the efficiency of solar thermal collectors and studying the effect of particle concentration and stability using nanofluidic analysis","authors":"Vetrivel Kumar Kandasamy, S. Jaganathan, Ratchagaraja Dhairiyasamy, S. Rajendran","doi":"10.1177/0958305X231183687","DOIUrl":"https://doi.org/10.1177/0958305X231183687","url":null,"abstract":"The emission of greenhouse gases is widely acknowledged as the primary driver of global warming. The adoption of renewable energy sources is paramount to address the dependence on fossil fuels, which contribute significantly to this issue and account for 84.3% of current energy production. Solar thermal energy stands out as a prominent option, representing 54.1% of the world's solar energy derived from solar collectors. However, solar thermal energy encounters challenge due to the suboptimal thermal properties of the liquids used in these collectors. Incorporating particles into the liquids offers a potential solution to enhance absorption and thermal properties. Nanofluids, formed by reducing solid particles to nanoscale dimensions, provide an avenue for improvement. This study aimed to produce an Ag nanofluid through mechanical exfoliation and assess its impact on radiation absorption compared to a GO nanofluid. Under a simulated power of 1 unit, the Ag nanofluid demonstrated temperature differences of 4 to 7°C, while pure water showed no significant deviation. Moreover, the evaporation efficiency of the Ag nanofluid reached up to 40.8% for concentrations of 200 and 500 ppm, compared to 28.6% for pure water. These findings highlight the potential of Ag nanofluid as a promising option for direct absorption solar collectors, owing to its cost-effectiveness, low toxicity, and similar benefits to graphene. Incorporating nanofluids, particularly the Ag nanofluid produced through mechanical exfoliation, can significantly enhance the efficiency of direct absorption solar collectors.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"9 1","pages":"1564 - 1591"},"PeriodicalIF":4.2,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86046041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.1177/0958305X221081463
F. Bayones, W. Jamshed, S. Elhag, Mohamed Rabea Eid
Parabolic trough solar collectors (PTSCs) are commonly used in solar thermal implementations to achieve high-temperatures. The current investigation looks at entropy formation and the effect of nano solid particles on a parabolic trough surface collector (PTSC) mounted aboard a solar-powered ship (SPS). The non-Newtonian first grade viscoelastic type, as well as a porous medium and Darcy-Forchheimer effects, were utilised in the current study. The flowing of PTSC was created by a non-linear stretching sheet, and the changing thermal conductivity, heat source, and viscous dissipation effects were used to calculate the heat flux in the thermal boundary layer. To convert partial differential equations (PDEs) into solvable ordinary differential equations (ODEs) with boundary-constraints, a similarity transformation strategy was used. The boundary-constraints and PDEs have been reduced to a set of non-linear ODEs (ordinary differential equations). To reach the approximated solution of ODEs, the Galerkin finite element method (G-FEM) is used. As working fluids, copper-sodium alginate (Cu-SA) and molybdenum disulfide-copper/sodium alginate (MoS2-Cu/SA) hybrid nanofluids were used. According to the findings, the permeability factor diminished the Nusselt number whilst boosting the skin friction factor. Furthermore, overall entropy variance throughout the domain was increased for flow speeds using the Reynolds number, and viscosity changes were tracked using the Brinkman number. When compared to MoS2-Cu/SA, using Cu-SA nanofluid boosted thermal efficiency by 1.3–18.8%.
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