Pub Date : 2023-10-03DOI: 10.1177/0958305x231204032
Min Sun Kim, Sun-Wook Jeong, Jung Eun Yang, Yong Jun Choi
With increasing interests in the biological conversion of waste resources into value-added chemicals and biocompounds, algal biomass has emerged as a promising renewable feedstock due to abundance, rapid growth, and sustainability. However, efficient bioconversion method is still being challenged due to the lack of suitable host strain capable of directly utilizing algal biomass and converting into desired products. In this study, a potent marine bacterium capable of producing zeaxanthin from algal biomass was investigated. The agarolytic bacterium, Cellulophaga omnivescoria MSK1 was isolated from coastal seawater. Through physiological and morphological analysis, it was confirmed that this bacterium degrade agarose into neoagarotetraose (NA4) and neoagarohexaose (NA6) and produces zeaxanthin using agarose as a carbon source. This bacterial strain demonstrated the ability to produce 2.23 ± 0.19 mg/L of zeaxanthin when provided with 0.2% agarose as a carbon source. By supplementing with glycerol, zeaxanthin production was further enhanced, reaching levels of 8.43 ± 0.31 mg/L, with a content of 6.77 ± 0.3 mg/g CDW (cell dry weight). These results suggest that an agarolytic Cellulophaga omnivescoria MSK1 strain has a great potential to be used as a platform microbial strain capable of producing zeaxanthin from algal biomass as a sustainable feedstock.
{"title":"Microbial production of zeaxanthin from algal biomass and waste glycerol using a newly isolated agarolytic marine bacterium <i>Cellulophaga omnivescoria</i> MSK1","authors":"Min Sun Kim, Sun-Wook Jeong, Jung Eun Yang, Yong Jun Choi","doi":"10.1177/0958305x231204032","DOIUrl":"https://doi.org/10.1177/0958305x231204032","url":null,"abstract":"With increasing interests in the biological conversion of waste resources into value-added chemicals and biocompounds, algal biomass has emerged as a promising renewable feedstock due to abundance, rapid growth, and sustainability. However, efficient bioconversion method is still being challenged due to the lack of suitable host strain capable of directly utilizing algal biomass and converting into desired products. In this study, a potent marine bacterium capable of producing zeaxanthin from algal biomass was investigated. The agarolytic bacterium, Cellulophaga omnivescoria MSK1 was isolated from coastal seawater. Through physiological and morphological analysis, it was confirmed that this bacterium degrade agarose into neoagarotetraose (NA4) and neoagarohexaose (NA6) and produces zeaxanthin using agarose as a carbon source. This bacterial strain demonstrated the ability to produce 2.23 ± 0.19 mg/L of zeaxanthin when provided with 0.2% agarose as a carbon source. By supplementing with glycerol, zeaxanthin production was further enhanced, reaching levels of 8.43 ± 0.31 mg/L, with a content of 6.77 ± 0.3 mg/g CDW (cell dry weight). These results suggest that an agarolytic Cellulophaga omnivescoria MSK1 strain has a great potential to be used as a platform microbial strain capable of producing zeaxanthin from algal biomass as a sustainable feedstock.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135695979","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 : 2023-10-03DOI: 10.1177/0958305x231204034
Osman Shamet, Bilal A. Qureshi, Mohamed Antar
Desalination technologies reject large amounts of brine with significant value back to sea. The concept of hybridization of different desalination technologies has proven that it can be effective in terms of reducing rejected brine and increasing the freshwater production rate as well as reducing the freshwater cost. In this work, brine recovery to improve water production through a simple modified configuration of integrating a multi-effect desalination (MED) system with humidification–dehumidification system (HDH). The rejected brine of the MED system is used as the feed for the HDH system without the need for preheating the rejected brine since it leaves the MED at a suitable temperature for HDH application. The study focuses on investigating the effect of different operating conditions on the increase in system freshwater production rate and recovery ratio as well as the exergetic efficiency. Parameters investigated include steam temperature, feed salinity, number of brine streams, cooling water flow rate, and ambient temperature. An exergo-economic analysis has also been conducted using the cost flow method to evaluate the freshwater production cost for the modified system. Results indicate that the integration of HDH can increase the water production rate by a maximum of 7.82% and produce fresh water at 2.08 $/m 3 compared to 2.094 $/m 3 when using the standalone system under the same conditions.
{"title":"Energy and exergo-economic analysis of a parallel feed multi-effect system integrated with humidification–dehumidification system for brine recovery","authors":"Osman Shamet, Bilal A. Qureshi, Mohamed Antar","doi":"10.1177/0958305x231204034","DOIUrl":"https://doi.org/10.1177/0958305x231204034","url":null,"abstract":"Desalination technologies reject large amounts of brine with significant value back to sea. The concept of hybridization of different desalination technologies has proven that it can be effective in terms of reducing rejected brine and increasing the freshwater production rate as well as reducing the freshwater cost. In this work, brine recovery to improve water production through a simple modified configuration of integrating a multi-effect desalination (MED) system with humidification–dehumidification system (HDH). The rejected brine of the MED system is used as the feed for the HDH system without the need for preheating the rejected brine since it leaves the MED at a suitable temperature for HDH application. The study focuses on investigating the effect of different operating conditions on the increase in system freshwater production rate and recovery ratio as well as the exergetic efficiency. Parameters investigated include steam temperature, feed salinity, number of brine streams, cooling water flow rate, and ambient temperature. An exergo-economic analysis has also been conducted using the cost flow method to evaluate the freshwater production cost for the modified system. Results indicate that the integration of HDH can increase the water production rate by a maximum of 7.82% and produce fresh water at 2.08 $/m 3 compared to 2.094 $/m 3 when using the standalone system under the same conditions.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135738968","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}
Syngas produced from glycerol using aqueous phase reforming for nickel-based catalysts with different support materials were tested in a compression ignition (CI) engine. Experiments were conducted using nickel–alumina, nickel–lanthanum (NL), and nickel–ceria catalysts at 1:1, 1:2, 1:3, and 1:4 glycerol–water ratios and temperatures of 240°C, 260°C, and 280°C. The NL catalyst showed the highest syngas and hydrogen yield of 90.58% and 76.42%, respectively, at 1:3 ratio and 260°C. The optimized NL syngas and diesel were tested in a CI engine at 6 to 30 lpm flow rates. At 30 lpm flow, brake thermal efficiency increased by 3.15%, NO x emission was reduced by 21.22%, and smoke lowered significantly compared to diesel. The faster hydrogen combustion in syngas increased the heat release rate and cylinder peak pressure. CO and HC emissions increased at lower loads due to diluted combustion but reduced at higher loads. NL showed the best performance and emissions among the syngases due to higher hydrogen content. In summary, the NL syngas at 30 lpm showed great potential in CI engines by improving combustion and performance and reducing emissions.
{"title":"Syngas production from aqueous phase reforming of glycerol–water mixture for compression ignition engine","authors":"Vetrivel Kumar Kandasamy, Arunkumar Munimathan, Silambarasan Rajendran, Ratchagaraja Dhairiyasamy","doi":"10.1177/0958305x231204028","DOIUrl":"https://doi.org/10.1177/0958305x231204028","url":null,"abstract":"Syngas produced from glycerol using aqueous phase reforming for nickel-based catalysts with different support materials were tested in a compression ignition (CI) engine. Experiments were conducted using nickel–alumina, nickel–lanthanum (NL), and nickel–ceria catalysts at 1:1, 1:2, 1:3, and 1:4 glycerol–water ratios and temperatures of 240°C, 260°C, and 280°C. The NL catalyst showed the highest syngas and hydrogen yield of 90.58% and 76.42%, respectively, at 1:3 ratio and 260°C. The optimized NL syngas and diesel were tested in a CI engine at 6 to 30 lpm flow rates. At 30 lpm flow, brake thermal efficiency increased by 3.15%, NO x emission was reduced by 21.22%, and smoke lowered significantly compared to diesel. The faster hydrogen combustion in syngas increased the heat release rate and cylinder peak pressure. CO and HC emissions increased at lower loads due to diluted combustion but reduced at higher loads. NL showed the best performance and emissions among the syngases due to higher hydrogen content. In summary, the NL syngas at 30 lpm showed great potential in CI engines by improving combustion and performance and reducing emissions.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135739123","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 : 2023-09-30DOI: 10.1177/0958305x231199242
Amirthavalli Velmurugan, Anita R. Warrier, Baskar Gurunathan
Non-toxic nanoscale metal oxide structures are emerging as potential material in energy and environmental applications because of their enhanced and controllable properties. In this research work, MgO nanoparticles were synthesized by sol–gel method. The calcination temperature and time was optimized at 600°C, 2 hours. The obtained mesoporous MgO nanoparticles (size 15 nm) had a band gap of approximately 3.3 eV. MgO nanoparticles shows a zeta potential value of 17.3 mV, which is considered to be incipiently stable. Biodiesel production was carried out using cubic MgO nanoparticles. Response surface methodology (RSM) and one factor method was employed for the optimization of operating variables. RSM predicts 90% of biodiesel yield at optimal 1% (w/w) of catalyst, 16:1 methanol to oil molar ratio, 65°C of reaction temperature in 42 minutes which is also verified experimentally (89.5%). Biodiesel yield of approximately 92% is obtained using one factor method at higher reaction time of 2 hours, reaction temperature of 60°C with 12:1 methanol to oil molar ratio and 2% (w/w) of catalyst. The hexadecanoic acid, stearic acid, linoleic acid and oleic acid in the waste cooking oil gets transformed into hexadecanoic acid methyl ester, methyl stearate, 9,12-octadecadienoic acid methyl ester and 9-octadecenoic acid methyl ester during transesterification which is inferred from GC–MS spectrum. Transesterification reaction follows pseudo-first-order kinetics. MgO nanocatalyst when reused in the transesterification shows a yield of approximately 90% up to four cycles.
{"title":"Biodiesel production by transesterification of low-cost feedstock (waste cooking oil) using mesoporous cubic-MgO nanocatalyst: Optimization using response surface methodology","authors":"Amirthavalli Velmurugan, Anita R. Warrier, Baskar Gurunathan","doi":"10.1177/0958305x231199242","DOIUrl":"https://doi.org/10.1177/0958305x231199242","url":null,"abstract":"Non-toxic nanoscale metal oxide structures are emerging as potential material in energy and environmental applications because of their enhanced and controllable properties. In this research work, MgO nanoparticles were synthesized by sol–gel method. The calcination temperature and time was optimized at 600°C, 2 hours. The obtained mesoporous MgO nanoparticles (size 15 nm) had a band gap of approximately 3.3 eV. MgO nanoparticles shows a zeta potential value of 17.3 mV, which is considered to be incipiently stable. Biodiesel production was carried out using cubic MgO nanoparticles. Response surface methodology (RSM) and one factor method was employed for the optimization of operating variables. RSM predicts 90% of biodiesel yield at optimal 1% (w/w) of catalyst, 16:1 methanol to oil molar ratio, 65°C of reaction temperature in 42 minutes which is also verified experimentally (89.5%). Biodiesel yield of approximately 92% is obtained using one factor method at higher reaction time of 2 hours, reaction temperature of 60°C with 12:1 methanol to oil molar ratio and 2% (w/w) of catalyst. The hexadecanoic acid, stearic acid, linoleic acid and oleic acid in the waste cooking oil gets transformed into hexadecanoic acid methyl ester, methyl stearate, 9,12-octadecadienoic acid methyl ester and 9-octadecenoic acid methyl ester during transesterification which is inferred from GC–MS spectrum. Transesterification reaction follows pseudo-first-order kinetics. MgO nanocatalyst when reused in the transesterification shows a yield of approximately 90% up to four cycles.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136279905","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 : 2023-09-28DOI: 10.1177/0958305x231204027
Yanyong Hu, Xuchao Zhang, Jiaxi Wu, Zheng Meng
The efficiency level, evolution characteristics, and factors driving the green economy in all provinces and regions should be clarified to achieve high-quality economic development and meet China's “double carbon” target. This study conducted the Super-Effective Slack-Based Model considering unexpected outputs to evaluate province-level Green Economic Efficiency (GEE) analysis (including 30 provinces, autonomous regions, and municipalities directly under the Central Government) in China from 2005 to 2020. Moreover, the distribution and dynamic evolution trend of GEE development was estimated through Kernel density estimation. Besides, GEE and its factors (i.e., industrial structure rationalization [ISR], industrial structure advancement [ISA], and urbanization level [UL]) were examined using a Panel vector autoregressive model that was built in this study. As indicated by the result of this study, China's GEE level generally displayed a “U-shaped” development trend of declining, stabilizing, and then rising, whereas the overall efficiency level is low, where the national GEE average reached 0.6934. The regional GEE level exhibited a significant “ladder” distribution, with the highest level, the second level, and the lowest level in the east, the middle, and the west, respectively. The GEE level varied significantly with the province, and most of the levels were at a medium efficiency level. Notably, 60% of regions had medium efficiency in 2020. The levels of ISR, ISA, and UL play significant roles in boosting green economic growth. This study provides valuable insights into the drivers of green economic growth in China guiding policy decisions on achieving a sustainable and low-carbon economy. As China strives to fulfill its ambitious carbon reduction goals, the findings of this study highlight the significance of continuing to prioritize green economic development at the provincial level.
{"title":"Understanding the efficiency and evolution of China's Green Economy: A province-level analysis","authors":"Yanyong Hu, Xuchao Zhang, Jiaxi Wu, Zheng Meng","doi":"10.1177/0958305x231204027","DOIUrl":"https://doi.org/10.1177/0958305x231204027","url":null,"abstract":"The efficiency level, evolution characteristics, and factors driving the green economy in all provinces and regions should be clarified to achieve high-quality economic development and meet China's “double carbon” target. This study conducted the Super-Effective Slack-Based Model considering unexpected outputs to evaluate province-level Green Economic Efficiency (GEE) analysis (including 30 provinces, autonomous regions, and municipalities directly under the Central Government) in China from 2005 to 2020. Moreover, the distribution and dynamic evolution trend of GEE development was estimated through Kernel density estimation. Besides, GEE and its factors (i.e., industrial structure rationalization [ISR], industrial structure advancement [ISA], and urbanization level [UL]) were examined using a Panel vector autoregressive model that was built in this study. As indicated by the result of this study, China's GEE level generally displayed a “U-shaped” development trend of declining, stabilizing, and then rising, whereas the overall efficiency level is low, where the national GEE average reached 0.6934. The regional GEE level exhibited a significant “ladder” distribution, with the highest level, the second level, and the lowest level in the east, the middle, and the west, respectively. The GEE level varied significantly with the province, and most of the levels were at a medium efficiency level. Notably, 60% of regions had medium efficiency in 2020. The levels of ISR, ISA, and UL play significant roles in boosting green economic growth. This study provides valuable insights into the drivers of green economic growth in China guiding policy decisions on achieving a sustainable and low-carbon economy. As China strives to fulfill its ambitious carbon reduction goals, the findings of this study highlight the significance of continuing to prioritize green economic development at the provincial level.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135385079","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 : 2023-09-26DOI: 10.1177/0958305x231201232
Qiong Shen, Yuxi Pan, Rui Wu, Yanchao Feng
Under the peer effect theory, this study examines the impact of environmental regulation on sulfur dioxide emissions and investigates the existence of peer effects in environmental governance mechanisms. Using panel data from 285 prefecture-level cities in China from 2008 to 2019, a spatial econometric model reveals that environmental regulation significantly reduces local sulfur dioxide discharge while exhibiting positive spatial spillover effects in surrounding regions, reflecting the “beggar-thy-neighbor” dilemma of environmental governance in China. The study confirms the presence of a positive peer effect of environmental regulation, supporting the combination of ‘top-down’ and ‘bottom-up’ ecological governance approaches. The impact of environmental regulation on sulfur dioxide emissions varies based on regulation intensities and urban characteristics such as geographical position, marketization degree, and official governor's tenure. Learning mechanisms and competition mechanisms partially establish the peer effect of environmental regulation in most Chinese cities. Additionally, exogenous shocks from macro events and strategic policies exert differential influences on the peer effect of environmental regulation, particularly in cities with low regulation intensity. This study provides valuable guidance for balancing environmental protection and sustainable economic growth, fostering intercity collaboration in environmental regulation, and formulating site-specific sustainable development strategies for China and other emerging economies.
{"title":"Peer effects of environmental regulation on sulfur dioxide emission intensity: Empirical evidence from China","authors":"Qiong Shen, Yuxi Pan, Rui Wu, Yanchao Feng","doi":"10.1177/0958305x231201232","DOIUrl":"https://doi.org/10.1177/0958305x231201232","url":null,"abstract":"Under the peer effect theory, this study examines the impact of environmental regulation on sulfur dioxide emissions and investigates the existence of peer effects in environmental governance mechanisms. Using panel data from 285 prefecture-level cities in China from 2008 to 2019, a spatial econometric model reveals that environmental regulation significantly reduces local sulfur dioxide discharge while exhibiting positive spatial spillover effects in surrounding regions, reflecting the “beggar-thy-neighbor” dilemma of environmental governance in China. The study confirms the presence of a positive peer effect of environmental regulation, supporting the combination of ‘top-down’ and ‘bottom-up’ ecological governance approaches. The impact of environmental regulation on sulfur dioxide emissions varies based on regulation intensities and urban characteristics such as geographical position, marketization degree, and official governor's tenure. Learning mechanisms and competition mechanisms partially establish the peer effect of environmental regulation in most Chinese cities. Additionally, exogenous shocks from macro events and strategic policies exert differential influences on the peer effect of environmental regulation, particularly in cities with low regulation intensity. This study provides valuable guidance for balancing environmental protection and sustainable economic growth, fostering intercity collaboration in environmental regulation, and formulating site-specific sustainable development strategies for China and other emerging economies.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134957885","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 : 2023-09-20DOI: 10.1177/0958305x231201974
Guoxiang Li, Qingqing Zong, Xueli Chen, Malin Song
The reasonable division of intergovernmental environmental affairs is the institutional basis for solving environmental pollution problems. This paper conducts an empirical test using panel data from cities in China. We find that: (a) environmental decentralization significantly improves the supply efficiency of environmental public services (ESE). It's mainly because of the increased capacity for green technology innovation and urban environmental infrastructure development brought about by environmental decentralization. (b) Environmental decentralization will improve the ESE more effectively in regions with the central government acting as a binding force, high environmental preferences, governance capacity of local governments, and pollutant emission intensity. (c) Higher promotion incentives for officials may distort the pollution control effect of environmental decentralization and inhibit the ESE. Appropriate central government transfer payments can better utilize the positive role of environmental decentralization.
{"title":"Intergovernmental environmental affairs division and environmental public services supply: Evidence from 289 cities in China","authors":"Guoxiang Li, Qingqing Zong, Xueli Chen, Malin Song","doi":"10.1177/0958305x231201974","DOIUrl":"https://doi.org/10.1177/0958305x231201974","url":null,"abstract":"The reasonable division of intergovernmental environmental affairs is the institutional basis for solving environmental pollution problems. This paper conducts an empirical test using panel data from cities in China. We find that: (a) environmental decentralization significantly improves the supply efficiency of environmental public services (ESE). It's mainly because of the increased capacity for green technology innovation and urban environmental infrastructure development brought about by environmental decentralization. (b) Environmental decentralization will improve the ESE more effectively in regions with the central government acting as a binding force, high environmental preferences, governance capacity of local governments, and pollutant emission intensity. (c) Higher promotion incentives for officials may distort the pollution control effect of environmental decentralization and inhibit the ESE. Appropriate central government transfer payments can better utilize the positive role of environmental decentralization.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136312969","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 : 2023-09-20DOI: 10.1177/0958305x231199151
S Satheesh Kumar, B Ashok Kumar, S Senthilrani
This review article gives a comprehensive review of existing research on renewable solar photovoltaic (PV) nanogrid, which is described from small-scale power system with a single domain for reliability, control, and power quality (PQ) for electric vehicle (EV) charging. A primary feeder on the Microgrid is connected to a nanogrid test bed that includes PV as power source, a battery energy storage system (BESS), smart-inverter multiple and EV charging stations (EVCS). The control algorithms are graded on four metrics: (1) voltage profiles, (2) renewable penetration, (3) PV curtailed and (4) net power flows. To investigate the local power quality, a steady-state power flow model of the nano-grid is created. The control algorithms successfully employ the battery to shift the nano-grid peak load while limiting the nano-grid demand to set level. Furthermore, an increasing emphasis is being placed on commonly used strategies for addressing the characteristics of each renewable system. This review paper characterizes the dynamic operation of 4 distinct BESS control algorithms for solar EV charging nanogrid: (1) peak load shifting, (2) reduce peak period impact, (3) cap demand, and (4) photovoltaic capture. These control modes are executed and analyzed on real-world nano-grid site, and optimal BESS control modes are assessed in terms of (1) solar electric vehicle charging, (2) power quality, (3) grid net demand, (4) photovoltaic curtailment, and (5) solar penetration. Finally, the problems highlight research gaps, and discussions on future trends are critical for enhancing the general technology of the renewable solar photovoltaic nano-grid for EV charging.
{"title":"Review of electric vehicle (EV) charging using renewable solar photovoltaic (PV) nano grid","authors":"S Satheesh Kumar, B Ashok Kumar, S Senthilrani","doi":"10.1177/0958305x231199151","DOIUrl":"https://doi.org/10.1177/0958305x231199151","url":null,"abstract":"This review article gives a comprehensive review of existing research on renewable solar photovoltaic (PV) nanogrid, which is described from small-scale power system with a single domain for reliability, control, and power quality (PQ) for electric vehicle (EV) charging. A primary feeder on the Microgrid is connected to a nanogrid test bed that includes PV as power source, a battery energy storage system (BESS), smart-inverter multiple and EV charging stations (EVCS). The control algorithms are graded on four metrics: (1) voltage profiles, (2) renewable penetration, (3) PV curtailed and (4) net power flows. To investigate the local power quality, a steady-state power flow model of the nano-grid is created. The control algorithms successfully employ the battery to shift the nano-grid peak load while limiting the nano-grid demand to set level. Furthermore, an increasing emphasis is being placed on commonly used strategies for addressing the characteristics of each renewable system. This review paper characterizes the dynamic operation of 4 distinct BESS control algorithms for solar EV charging nanogrid: (1) peak load shifting, (2) reduce peak period impact, (3) cap demand, and (4) photovoltaic capture. These control modes are executed and analyzed on real-world nano-grid site, and optimal BESS control modes are assessed in terms of (1) solar electric vehicle charging, (2) power quality, (3) grid net demand, (4) photovoltaic curtailment, and (5) solar penetration. Finally, the problems highlight research gaps, and discussions on future trends are critical for enhancing the general technology of the renewable solar photovoltaic nano-grid for EV charging.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136313388","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 : 2023-09-14DOI: 10.1177/0958305x231199153
Xinghua Cui, Xueping Ning, Ning Xu, Wenjie Zhang
This study explores the role of social credit system construction, an informal institution, in improving corporate environmental performance. To identify the causal connections between social credit and corporate environmental performance, the progressive difference-in-differences (DID) method is adopted by introducing the social credit system construction pilots aiming to improve the social credit environment of China as a quasi-natural experiment. Empirical results imply that social credit system constructions exert a significant improvement effect on corporate environmental performance. In addition, corporate innovation, financial constraints alleviation, and the strengthening of environmental cases enforcement are three effective action mechanisms by which social credit system constructions helping improve corporate environmental performance. Moreover, this promotion effect presents heterogeneity characteristics due to enterprises ownership and the environmental pollution degree of the city where the enterprise is located. This study provides an informal institutional perspective for the green development of enterprises.
{"title":"Social credit system construction and corporate environmental performance: A quasi-natural experiment from China","authors":"Xinghua Cui, Xueping Ning, Ning Xu, Wenjie Zhang","doi":"10.1177/0958305x231199153","DOIUrl":"https://doi.org/10.1177/0958305x231199153","url":null,"abstract":"This study explores the role of social credit system construction, an informal institution, in improving corporate environmental performance. To identify the causal connections between social credit and corporate environmental performance, the progressive difference-in-differences (DID) method is adopted by introducing the social credit system construction pilots aiming to improve the social credit environment of China as a quasi-natural experiment. Empirical results imply that social credit system constructions exert a significant improvement effect on corporate environmental performance. In addition, corporate innovation, financial constraints alleviation, and the strengthening of environmental cases enforcement are three effective action mechanisms by which social credit system constructions helping improve corporate environmental performance. Moreover, this promotion effect presents heterogeneity characteristics due to enterprises ownership and the environmental pollution degree of the city where the enterprise is located. This study provides an informal institutional perspective for the green development of enterprises.","PeriodicalId":11652,"journal":{"name":"Energy & Environment","volume":"26 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":"135552721","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 : 2023-09-14DOI: 10.1177/0958305x231200572
Mohd Alsaleh, Xiaohui Wang, Zhang Nan
Indeed, waste from marine may have a significant negative economic impact on coastal towns, tourism, shipping, and fisheries. Given its accumulation and spread, waste from marine may be one of the most urgent dangers to the sustainability of marine life and the health of the EU's waters. By considering the role of production in fisheries, fossil fuel use, economic development, and governance from 1990 to 2022, this research seeks to explore the dynamic influence of the fisheries sector on marine hazardous waste in 27 European nations. At higher quantiles, the findings showed a strong positive association between fisheries capacity production and marine hazardous waste at a 1% statistical level using the new Method of Moments Quantile Regression with fixed effects. From the fifth through the ninth quantiles (≈0.250), fishery output considerably increases marine waste, with a more substantial influence at the highest (≈0.239) and a lower impact at the lowest quantile (≈0.056). The findings also show that affluent countries in the EU14 have more significant at a 1% statistical level beneficial effect on marine waste than developing nations in the EU13. Using fossil fuels increased marine waste across all quantiles at a 1% statistical level. Still, economic development in EU14 developed and EU13 developing countries causes marine waste to decrease, at 1% and 10% statistical levels, respectively, supporting the growth theory for nations that produce fisheries. From the first through the ninth quantiles (≈−6.677) in EU27 nations, the influence of governance was adversely significant at a 1% statistical level. The findings suggest that the developed EU14 countries are more affected negatively by governance on marine waste. Using effective and environmentally friendly technology, policymakers may reduce marine waste in the EU14 and the EU13 nations while achieving sustainable development objectives.
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