A comprehensive examination of a 10-kW simple H2O/LiBr absorption system energized by an evacuated tube solar collector of the single-ended glass direct flow type has been conducted. For various operating conditions, the thermal and exergetic performance coefficients (COP, ECOP respectively), and exergy destruction (ΔE) through each system component are determined. At evaporator temperatures of 1°C, 5°C, and 10°C, COP around 0.75, 0.77, and 0.81, respectively, was achieved, and the maximum ECOP values of approximately 0.36, 0.35, and 0.342, respectively, could be attained. The highest values of COP and ECOP were seen at a desorber temperature of around 90°C. Around 41% of the system’s exergy destructed were attributed to the desorber. The lowest absorber exergy losses occur at a desorber temperature of 90°C for various evaporator temperatures. Increasing the desorber temperature by a factor of two reduces the system’s efficiency from 0.45 to 0.20. In addition, 65.88% solar collector exegetic efficiency was achieved when its differential temperature surpasses 50°C.
{"title":"Exergetic-energetic effectiveness of a simple H2O-LiBr absorption chiller operated by solar energy collected using a direct flow evacuated tube collector","authors":"H. Al-Tahaineh","doi":"10.1093/ijlct/ctad037","DOIUrl":"https://doi.org/10.1093/ijlct/ctad037","url":null,"abstract":"A comprehensive examination of a 10-kW simple H2O/LiBr absorption system energized by an evacuated tube solar collector of the single-ended glass direct flow type has been conducted. For various operating conditions, the thermal and exergetic performance coefficients (COP, ECOP respectively), and exergy destruction (ΔE) through each system component are determined. At evaporator temperatures of 1°C, 5°C, and 10°C, COP around 0.75, 0.77, and 0.81, respectively, was achieved, and the maximum ECOP values of approximately 0.36, 0.35, and 0.342, respectively, could be attained. The highest values of COP and ECOP were seen at a desorber temperature of around 90°C. Around 41% of the system’s exergy destructed were attributed to the desorber. The lowest absorber exergy losses occur at a desorber temperature of 90°C for various evaporator temperatures. Increasing the desorber temperature by a factor of two reduces the system’s efficiency from 0.45 to 0.20. In addition, 65.88% solar collector exegetic efficiency was achieved when its differential temperature surpasses 50°C.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60776908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhongfei Liu, Yang Ding, Fang Wang, S. Ding, Shiyuan Wang, Zhenzhen Zhang, Yunding Li, W. Guo
In the extraction and usage of liquefied natural gas (LNG) cold energy, the heat transfer research of cryogenic fluid in spiral coil is mostly under the simplified condition of constant boundary temperature or constant heat flux density. This paper focuses on the actual situation of fluid–fluid coupling heat transfer in spiral coil. Under the condition of variable physical parameters, computational fluid dynamics numerical analysis is carried out on the non-customized numerical model through the Realizable k-ε turbulence model, and the influence of LNG flow and evaporation heat transfer characteristics in spiral coil is studied by changing the heat transfer structure. The results show that the heat transfer under non-constant boundary conditions is more in line with the actual heat transfer, and the spiral radius has the greatest influence on the heat transfer coefficient. When the spiral radius increases from 40 to 100 mm, the heat transfer coefficient decreases by 60.14%.
{"title":"Flow evaporation heat transfer of liquefied natural gas in a spiral pipe based on fluid coupling","authors":"Zhongfei Liu, Yang Ding, Fang Wang, S. Ding, Shiyuan Wang, Zhenzhen Zhang, Yunding Li, W. Guo","doi":"10.1093/ijlct/ctad067","DOIUrl":"https://doi.org/10.1093/ijlct/ctad067","url":null,"abstract":"In the extraction and usage of liquefied natural gas (LNG) cold energy, the heat transfer research of cryogenic fluid in spiral coil is mostly under the simplified condition of constant boundary temperature or constant heat flux density. This paper focuses on the actual situation of fluid–fluid coupling heat transfer in spiral coil. Under the condition of variable physical parameters, computational fluid dynamics numerical analysis is carried out on the non-customized numerical model through the Realizable k-ε turbulence model, and the influence of LNG flow and evaporation heat transfer characteristics in spiral coil is studied by changing the heat transfer structure. The results show that the heat transfer under non-constant boundary conditions is more in line with the actual heat transfer, and the spiral radius has the greatest influence on the heat transfer coefficient. When the spiral radius increases from 40 to 100 mm, the heat transfer coefficient decreases by 60.14%.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60778024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Premvrat Kumar, G. Nakkeeran, K. Onyelowe, L. Krishnaraj
In the construction sector, cement plays a vital role in all the members and components in which it acts as a binder and strength-dependent material. The production of cement material emits a large quantity of CO2 gas, which has been the main cause of global warming and other environmental and health issues. To overcome this issue, low carbon or net-zero cement production and utilization is a necessity, which equally satisfies the binder ability of conventional ordinary Portland cement (OPC). The fly ash from thermal power stations that is deposited in the yard is the most frequently used replacement material for cement. Due to its excellent pozzolanic properties, this fly ash can be utilized in place of binding materials in the building industry to achieve carbon neutrality. In this investigation, fly ash is used to prepare net-zero mortars in place of a significant amount of cement. Fly ash is utilized both in its natural form and after being ground into tiny particles for increased reactivity and effectiveness. The test for compressive strength allows for a detailed examination of the mechanical properties by altering the ratio of water to cement with and without the use of super plasticizer (SP). The best mortar is fine F fly ash (FFFA), which is made using a water-to-cement ratio of 0.4 + 1% SP. To validate the outcomes of this investigation, a characterization study of the improved mortars was examined.
{"title":"Comparative study on net-zero masonry walls made of clay and fly ash bricks and grouts/mortars/stuccos with the effect of super fine fly ash blended cement—low carbon cement","authors":"Premvrat Kumar, G. Nakkeeran, K. Onyelowe, L. Krishnaraj","doi":"10.1093/ijlct/ctad087","DOIUrl":"https://doi.org/10.1093/ijlct/ctad087","url":null,"abstract":"In the construction sector, cement plays a vital role in all the members and components in which it acts as a binder and strength-dependent material. The production of cement material emits a large quantity of CO2 gas, which has been the main cause of global warming and other environmental and health issues. To overcome this issue, low carbon or net-zero cement production and utilization is a necessity, which equally satisfies the binder ability of conventional ordinary Portland cement (OPC). The fly ash from thermal power stations that is deposited in the yard is the most frequently used replacement material for cement. Due to its excellent pozzolanic properties, this fly ash can be utilized in place of binding materials in the building industry to achieve carbon neutrality. In this investigation, fly ash is used to prepare net-zero mortars in place of a significant amount of cement. Fly ash is utilized both in its natural form and after being ground into tiny particles for increased reactivity and effectiveness. The test for compressive strength allows for a detailed examination of the mechanical properties by altering the ratio of water to cement with and without the use of super plasticizer (SP). The best mortar is fine F fly ash (FFFA), which is made using a water-to-cement ratio of 0.4 + 1% SP. To validate the outcomes of this investigation, a characterization study of the improved mortars was examined.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60778298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper carried out the environmental and economic evaluation for the hydrogen storage technologies on the sedan with Type 3 and Type 4 high-pressured and cryogenic vessels based on life cycle analysis (LCA) method. It is found that Type 4 high-pressured vessel manufacture emits minimum greenhouse gas (GHG) with 5539 kgCO2 eq, which is lower than Type 3 high-pressured vessel of 7219 kgCO2 eq and cryogenic vessel of 135 000 kgCO2 eq in their whole life cycle. The economic analysis shows that Type 4 high-pressure vessel has the lowest cost of 10.4 US$/kgH2 and the minimum energy consumption of 5.2 kWh/kgH2, which is lower than Type 3 high-pressure vessel and cryogenic vessel. With this result, Type 4 high-pressure vessel is a promising choice for hydrogen mobility on the sedan regarding its environmental impact and economic performance.
{"title":"Environmental and economic evaluation of the high-pressured and cryogenic vessels for hydrogen storage on the sedan","authors":"Linghe Ye, Lin Lu","doi":"10.1093/ijlct/ctac126","DOIUrl":"https://doi.org/10.1093/ijlct/ctac126","url":null,"abstract":"This paper carried out the environmental and economic evaluation for the hydrogen storage technologies on the sedan with Type 3 and Type 4 high-pressured and cryogenic vessels based on life cycle analysis (LCA) method. It is found that Type 4 high-pressured vessel manufacture emits minimum greenhouse gas (GHG) with 5539 kgCO2 eq, which is lower than Type 3 high-pressured vessel of 7219 kgCO2 eq and cryogenic vessel of 135 000 kgCO2 eq in their whole life cycle. The economic analysis shows that Type 4 high-pressure vessel has the lowest cost of 10.4 US$/kgH2 and the minimum energy consumption of 5.2 kWh/kgH2, which is lower than Type 3 high-pressure vessel and cryogenic vessel. With this result, Type 4 high-pressure vessel is a promising choice for hydrogen mobility on the sedan regarding its environmental impact and economic performance.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60776794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Building surface reflectivity determines the amount of reflected solar radiation, which indirectly affects the cooling and heating load of a building. Therefore, optimizing building surface retro-reflectivity is an effective method to reduce energy load and CO2 emissions of buildings. To analyse the optimization potential of building surface retro-reflectivity, the effect of surface reflectivity on daily, monthly and yearly energy load, as well as CO2 emissions of an educational building were simulated based on the Energyplus software. The numerical results showed that for daily energy load in four typical seasons, there was a positive correlation between the daily energy load and building surface reflectivities in January, April and October and a negative correlation in July. For monthly energy load, the building cooling and heating loads were the highest in January and August, respectively. For annual energy load, the higher the reflectivity, the lower the cooling load and the higher the heating load. When the building surface reflectivity was 0.7, the annual energy load was the least, with a value of 148.23 kWh/m2. In addition, the CO2 emission was also the lowest, with a value of 24.79 kg/m2. According to the relation between building surface reflectivities and retro-reflectivities, the optimal retro-reflectivity was 0.47.
{"title":"Optimizing building surface retro-reflectivity to reduce energy load and CO2 emissions of an enclosed teaching building","authors":"Li Qi, Jing Wang","doi":"10.1093/ijlct/ctad048","DOIUrl":"https://doi.org/10.1093/ijlct/ctad048","url":null,"abstract":"Building surface reflectivity determines the amount of reflected solar radiation, which indirectly affects the cooling and heating load of a building. Therefore, optimizing building surface retro-reflectivity is an effective method to reduce energy load and CO2 emissions of buildings. To analyse the optimization potential of building surface retro-reflectivity, the effect of surface reflectivity on daily, monthly and yearly energy load, as well as CO2 emissions of an educational building were simulated based on the Energyplus software. The numerical results showed that for daily energy load in four typical seasons, there was a positive correlation between the daily energy load and building surface reflectivities in January, April and October and a negative correlation in July. For monthly energy load, the building cooling and heating loads were the highest in January and August, respectively. For annual energy load, the higher the reflectivity, the lower the cooling load and the higher the heating load. When the building surface reflectivity was 0.7, the annual energy load was the least, with a value of 148.23 kWh/m2. In addition, the CO2 emission was also the lowest, with a value of 24.79 kg/m2. According to the relation between building surface reflectivities and retro-reflectivities, the optimal retro-reflectivity was 0.47.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60777587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Microgrids containing renewable energy, energy storage systems and loads have been widely used because of their advantages of environmental friendliness. The role of the energy storage system is to balance the power fluctuation of renewable energy and load and maintain the stability of the power of the microgrid. At present, a large number of studies point out that the use of lithium-ion batteries and supercapacitors (SCs) composed of hybrid energy storage system has better performance. In this paper, we use high-capacity lithium-ion batteries instead of SCs to smooth the microgrid power fluctuations: when the microgrid power fluctuations are small, low-capacity lithium-ion batteries will be alone to smooth the power fluctuations; when the microgrid power fluctuations are medium, low-capacity and high-capacity batteries will be decomposed by wavelet packets to suppress power fluctuations; and when the microgrid power fluctuations are large, high-capacity batteries will smooth out power fluctuations on their own. The contribution of this paper is that we use high-capacity lithium-ion batteries instead of SCs because SCs are very expensive and their features are very small. The effect of the strategy proposed in this paper is verified by simulation. The battery can quickly stabilize the sudden increase in bus fluctuations; if the actual situation is considered, the time will be shorter.
{"title":"Lithium-ion battery smoothing power fluctuation strategy for DC microgrid","authors":"Jingjing Cheng, Minglong Zhou","doi":"10.1093/ijlct/ctad063","DOIUrl":"https://doi.org/10.1093/ijlct/ctad063","url":null,"abstract":"Microgrids containing renewable energy, energy storage systems and loads have been widely used because of their advantages of environmental friendliness. The role of the energy storage system is to balance the power fluctuation of renewable energy and load and maintain the stability of the power of the microgrid. At present, a large number of studies point out that the use of lithium-ion batteries and supercapacitors (SCs) composed of hybrid energy storage system has better performance. In this paper, we use high-capacity lithium-ion batteries instead of SCs to smooth the microgrid power fluctuations: when the microgrid power fluctuations are small, low-capacity lithium-ion batteries will be alone to smooth the power fluctuations; when the microgrid power fluctuations are medium, low-capacity and high-capacity batteries will be decomposed by wavelet packets to suppress power fluctuations; and when the microgrid power fluctuations are large, high-capacity batteries will smooth out power fluctuations on their own. The contribution of this paper is that we use high-capacity lithium-ion batteries instead of SCs because SCs are very expensive and their features are very small. The effect of the strategy proposed in this paper is verified by simulation. The battery can quickly stabilize the sudden increase in bus fluctuations; if the actual situation is considered, the time will be shorter.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60777905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heat metering and charging can help raise residents’ awareness of energy conservation and save heat consumption in buildings. The heat metering and charging in China, however, was promoted insignificantly. To explore the behavior mechanism of heat-supply enterprises implementing heat metering and charging under the background of complex network in China’s heating region, and put forward the promotion strategies of heat metering and charging, this paper uses the heat-supply enterprises as the sample, improves the utility function of heat-supply enterprises by considering their difference aversion preference and altruistic preference at the same time based on the Difference Averse Surplus Maximizer Model. Then, we establish a complex network evolutionary game model among different heat-supply enterprises, and an empirical analysis is conducted to examine the impact of different factor on heat-supply enterprises in China’s heating region to implement heat metering and charging. The conclusions are as follows: (1) With the current heating cost and income, even if the government subsidizes all environmental benefit generated by heat metering and charging to heat-supply enterprises, the heat metering and charging could not be promoted in different scales of networks. (2) Increasing metering heat price, government fine, environmental protection tax and carbon emission trading price have positive effects on the promotion of heat metering and charging in different scales of networks. (3) The value of metering heat price, government fine, environmental protection tax and carbon emission trading price have no significant impacts on the evolutionary speeds of different scales of networks.
{"title":"The promotion strategies of heat metering and charging in China’s heating region based on complex network evolutionary game model","authors":"Wei Hu, Hongwen Yuan, X. Chen, Qin Ding","doi":"10.1093/ijlct/ctad088","DOIUrl":"https://doi.org/10.1093/ijlct/ctad088","url":null,"abstract":"Heat metering and charging can help raise residents’ awareness of energy conservation and save heat consumption in buildings. The heat metering and charging in China, however, was promoted insignificantly. To explore the behavior mechanism of heat-supply enterprises implementing heat metering and charging under the background of complex network in China’s heating region, and put forward the promotion strategies of heat metering and charging, this paper uses the heat-supply enterprises as the sample, improves the utility function of heat-supply enterprises by considering their difference aversion preference and altruistic preference at the same time based on the Difference Averse Surplus Maximizer Model. Then, we establish a complex network evolutionary game model among different heat-supply enterprises, and an empirical analysis is conducted to examine the impact of different factor on heat-supply enterprises in China’s heating region to implement heat metering and charging. The conclusions are as follows: (1) With the current heating cost and income, even if the government subsidizes all environmental benefit generated by heat metering and charging to heat-supply enterprises, the heat metering and charging could not be promoted in different scales of networks. (2) Increasing metering heat price, government fine, environmental protection tax and carbon emission trading price have positive effects on the promotion of heat metering and charging in different scales of networks. (3) The value of metering heat price, government fine, environmental protection tax and carbon emission trading price have no significant impacts on the evolutionary speeds of different scales of networks.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60778348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G R Venkatakrishnan, R Rengaraj, S Tamilselvi, J Harshini, Ansheela Sahoo, C Ahamed Saleel, Mohamed Abbas, Erdem Cuce, C Jazlyn, Saboor Shaik, Pinar Mert Cuce, Saffa Riffat
Abstract Over the past decade, the significance of solar photovoltaic (PV) system has played a major role due to the rapid growth in the solar PV industry. Reliability, efficiency and safety of solar PV systems can be enhanced by continuous monitoring of the system and detecting the faults if any as early as possible. Reduced real time power generation and reduced life span of the solar PV system are the results if the fault in solar PV system is found undetected. Therefore, it is mandatory to identify and locate the type of fault occurring in a solar PV system. The faults occurring in the solar PV system are classified as follows: physical, environmental, and electrical faults that are further classified into different types as described in this paper. Once a fault is located and detected, an appropriate diagnosis method needs to be used to rectify it. In this paper, a comprehensive review of diverse fault diagnosis techniques reported in various literature is listed and described. This paper helps the researchers to get an awareness of the various faults occurring in a solar PV system and enables them to choose a suitable diagnosis technique based on its performance metrics to rectify the fault occurring in solar PV systems.
{"title":"Detection, location, and diagnosis of different faults in large solar PV system—a review","authors":"G R Venkatakrishnan, R Rengaraj, S Tamilselvi, J Harshini, Ansheela Sahoo, C Ahamed Saleel, Mohamed Abbas, Erdem Cuce, C Jazlyn, Saboor Shaik, Pinar Mert Cuce, Saffa Riffat","doi":"10.1093/ijlct/ctad018","DOIUrl":"https://doi.org/10.1093/ijlct/ctad018","url":null,"abstract":"Abstract Over the past decade, the significance of solar photovoltaic (PV) system has played a major role due to the rapid growth in the solar PV industry. Reliability, efficiency and safety of solar PV systems can be enhanced by continuous monitoring of the system and detecting the faults if any as early as possible. Reduced real time power generation and reduced life span of the solar PV system are the results if the fault in solar PV system is found undetected. Therefore, it is mandatory to identify and locate the type of fault occurring in a solar PV system. The faults occurring in the solar PV system are classified as follows: physical, environmental, and electrical faults that are further classified into different types as described in this paper. Once a fault is located and detected, an appropriate diagnosis method needs to be used to rectify it. In this paper, a comprehensive review of diverse fault diagnosis techniques reported in various literature is listed and described. This paper helps the researchers to get an awareness of the various faults occurring in a solar PV system and enables them to choose a suitable diagnosis technique based on its performance metrics to rectify the fault occurring in solar PV systems.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135585754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Improving the efficiency of agricultural carbon emission is an inevitable choice for high-quality sustainable development. As a new financial intermediary, what impact does the growth of digital financial inclusion have on the efficiency of agricultural carbon emissions? This paper uses the SBM-ML model to calculate the agricultural carbon emission efficiency of 110 prefecture-level cities in the Yangtze River Economic Belt from 2012 to 2020. Then, it analyzes its temporal and spatial evolution trend. Based on it, the panel regression model is used to analyze how the growth of digital financial inclusion affects agricultural carbon emission efficiency. Results show the following: (1) from the time dimension, the efficiency generally declined first and then rose with less fluctuations and stability, which is determined by technical efficiency and technological progress change, and from the spatial dimension, the number of cities with agricultural carbon emission efficiency greater than 1.0 is generally increasing, reflecting that the overall level is increasing; and (2) the growth of digital financial inclusion has a negative impact on agricultural carbon emission efficiency. The improvement of agricultural carbon emission efficiency has been hampered by the use depth and digitalization level of digital financial inclusion, but its coverage breadth can support this improvement. This paper aims to advance digital financial inclusive growth and low-carbon transformation of agriculture in China.
{"title":"Study on the influence of digital financial inclusion on agricultural carbon emission efficiency in the Yangtze River Economic Belt","authors":"Shengtian Jin, Zhuo Chen, Bingfei Bao, Xinming Zhang","doi":"10.1093/ijlct/ctad072","DOIUrl":"https://doi.org/10.1093/ijlct/ctad072","url":null,"abstract":"Abstract Improving the efficiency of agricultural carbon emission is an inevitable choice for high-quality sustainable development. As a new financial intermediary, what impact does the growth of digital financial inclusion have on the efficiency of agricultural carbon emissions? This paper uses the SBM-ML model to calculate the agricultural carbon emission efficiency of 110 prefecture-level cities in the Yangtze River Economic Belt from 2012 to 2020. Then, it analyzes its temporal and spatial evolution trend. Based on it, the panel regression model is used to analyze how the growth of digital financial inclusion affects agricultural carbon emission efficiency. Results show the following: (1) from the time dimension, the efficiency generally declined first and then rose with less fluctuations and stability, which is determined by technical efficiency and technological progress change, and from the spatial dimension, the number of cities with agricultural carbon emission efficiency greater than 1.0 is generally increasing, reflecting that the overall level is increasing; and (2) the growth of digital financial inclusion has a negative impact on agricultural carbon emission efficiency. The improvement of agricultural carbon emission efficiency has been hampered by the use depth and digitalization level of digital financial inclusion, but its coverage breadth can support this improvement. This paper aims to advance digital financial inclusive growth and low-carbon transformation of agriculture in China.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135001738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Solar energy, as a prominent clean energy source, is increasingly favored by nations worldwide. However, managing numerous photovoltaic (PV) power generation units via wired connections presents a considerable challenge. The advent of the Internet of Things (IoT) and cloud service technologies has facilitated the creation of an efficient and convenient PV grid-connected management system. This paper investigates IoT technology and PV grid-connected systems, integrating wireless sensor network technology, cloud computing service platforms and distributed PV grid-connected systems. We propose a Zigbee wireless network featuring ad hoc network functionality and Narrow Band Internet of Things (NB-IoT) smart gateway with multi-protocol and multi-device support. This system enables the collection and uploading of PV grid-connected system data to cloud service platforms, addressing daily operation and maintenance as well as intelligent management of distributed PV power stations. Furthermore, it expedites the aggregation and analysis of PV power generation data, streamlining power marketing across various regions.
{"title":"Architecture design of grid-connected exploratory photovoltaic power generation based on Internet of Things and construction of power marketing system","authors":"Feng Qian, Zhe Wang, Jinghua Wang","doi":"10.1093/ijlct/ctad099","DOIUrl":"https://doi.org/10.1093/ijlct/ctad099","url":null,"abstract":"Abstract Solar energy, as a prominent clean energy source, is increasingly favored by nations worldwide. However, managing numerous photovoltaic (PV) power generation units via wired connections presents a considerable challenge. The advent of the Internet of Things (IoT) and cloud service technologies has facilitated the creation of an efficient and convenient PV grid-connected management system. This paper investigates IoT technology and PV grid-connected systems, integrating wireless sensor network technology, cloud computing service platforms and distributed PV grid-connected systems. We propose a Zigbee wireless network featuring ad hoc network functionality and Narrow Band Internet of Things (NB-IoT) smart gateway with multi-protocol and multi-device support. This system enables the collection and uploading of PV grid-connected system data to cloud service platforms, addressing daily operation and maintenance as well as intelligent management of distributed PV power stations. Furthermore, it expedites the aggregation and analysis of PV power generation data, streamlining power marketing across various regions.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136302879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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