International Journal of Low-carbon Technologies最新文献_第6页

Simulation-Based Educational Approach Toward Improving Thermal Outdoor Comfort for Pedestrians In Semi-Arid Climate 半干旱气候下行人室外热舒适性改善的模拟教育方法

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-02-02 DOI: 10.1093/ijlct/ctac142

B. Sayad, Alkama Djamel, Hossam Samir Ibrahim, I. Hegazy, Ayman Imam, A. M. Abed, H. Alhubashi

{"title":"Simulation-Based Educational Approach Toward Improving Thermal Outdoor Comfort for Pedestrians In Semi-Arid Climate","authors":"B. Sayad, Alkama Djamel, Hossam Samir Ibrahim, I. Hegazy, Ayman Imam, A. M. Abed, H. Alhubashi","doi":"10.1093/ijlct/ctac142","DOIUrl":"https://doi.org/10.1093/ijlct/ctac142","url":null,"abstract":"\u0000 The urban cooling is the most effective strategy to fight the urban climate change effects in summertime. Thus, searching urban cool islands can remedy the rise of urban temperatures. This study aims to consider cool urban pathways offering optimal levels of thermal comfort in downtown Guelma during summer overheating. This involves researching the appropriate tree ratio and typology, tree layout and suitable configurations of water bodies of outdoor spaces. The scientific methodology is made through either straightforward step included on-site measurements and calculating the difference of urban temperatures to select five outdoor spaces with maximum heat stress. As our study also aims to improve the outdoor thermal comfort by natural elements, it simulates different scenarios of the selected stations using ENVI-Met model and exploiting the real field measurement of the urban microclimate. The most significant reductions in thermal comfort levels (UTCI) over three thermal phases to identify the coolest urban pathways. Consequently, we confirmed that considering cool pathways spanning from station S2 to station S8 is possible with optimal thermal comfort levels over the day; 0.46°C to 6.9°C in the morning phase, 0.94°C to 3.87°C in the hot thermal phase, and 1.42° C to 3.54° C in thermal relief phase. The findings indicate three main effects of microclimatic regulation underlie the improvement of the thermal comfort levels: tree cooling effect with (Ta ≤ 1,1° C), cooling effect of water bodies (Ta ≤ 0.3° C) and Cooling effect of trees in combination with water bodies (Ta ≤ 1,9° C).","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47478762","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}

引用次数: 0

Development and performance evaluation of an intelligent air purifier/humidifier using fuzzy logic controller 基于模糊控制器的智能空气净化器/加湿器的研制与性能评价

4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-02-02 DOI: 10.1093/ijlct/ctad004

Omonigho Peter Emenuvwe, Umar Ali Umar, Samaila Umaru, Ayodeji Nathaniel Oyedeji

{"title":"Development and performance evaluation of an intelligent air purifier/humidifier using fuzzy logic controller","authors":"Omonigho Peter Emenuvwe, Umar Ali Umar, Samaila Umaru, Ayodeji Nathaniel Oyedeji","doi":"10.1093/ijlct/ctad004","DOIUrl":"https://doi.org/10.1093/ijlct/ctad004","url":null,"abstract":"Abstract This study aimed to develop and implement a fuzzy logic controlled-intelligent air purifier/humidifier. The concepts of passive purification and evaporative humidification were used to build this device, and engineering ideas and theories were used to guide the development of electrical and mechanical systems. Additionally, a fuzzy logic controller was designed, built, and integrated into the air purifier/humidifier device to help with its operation. It does this by analyzing input signals from all the sensors (dust, VOC gas, humidity, and water level) and activating the actuators (suction and blow fan). On the Arduino IDE, a C/C++ programming code was developed and uploaded onto the Arduino Uno R3 board, which houses the ATmega328P microcontroller processor. In estimating the clean air delivery rate, noise level, and moisture delivery rate, the performance of the developed air purifier/humidifier was assessed. Additionally, the electrical systems’ power consumption and the fuzzy logic controller’s ease of use were each assessed. In light of the room capacity taken into consideration, the findings obtained demonstrated that the proposed air purifier/humidifier device satisfies the minimum standard requirement of a clean air delivery rate of 140m3/hr. The outcome also revealed that the designed device’s noise level is lower than the typical threshold for an air purifier, which is less than 40 decibels. Additionally, after 68 minutes, the device raised the humidity level in a controlled area from 21% to 40%.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135360584","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}

引用次数: 0

Evolutionary game analysis of energy saving behavior of tourism enterprises under carbon emission constraints 碳排放约束下旅游企业节能行为的演化博弈分析

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-26 DOI: 10.1093/ijlct/ctac133

Zi Tang, Minsi Zhang

引用次数: 1

CFD Modeling of a Horizontal Wind Turbine by Utilizing Solar Nozzle for Power Production 利用太阳能喷嘴发电的水平风力涡轮机CFD建模

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-26 DOI: 10.1093/ijlct/ctac127

Hussein A. Z. AL‐bonsrulah, S. Danook, M. Alshukri, Ali Mahmood Ahmed, R. Vijayanandh, Dhinakaran Veeman, Mohammed Al‐Bahrani

{"title":"CFD Modeling of a Horizontal Wind Turbine by Utilizing Solar Nozzle for Power Production","authors":"Hussein A. Z. AL‐bonsrulah, S. Danook, M. Alshukri, Ali Mahmood Ahmed, R. Vijayanandh, Dhinakaran Veeman, Mohammed Al‐Bahrani","doi":"10.1093/ijlct/ctac127","DOIUrl":"https://doi.org/10.1093/ijlct/ctac127","url":null,"abstract":"\u0000 In this study, utilizing air velocity by converting wind kinetic energy into mechanical energy due to the converging area, has been numerically studied by proposing a 3D novel model and using ANSYS Fluent 19 software. Solar radiation by using the radiation model (S2S) has been considered to benefit from the heat energy to be converted into kinetic energy of the flow. Ultimate dimensions were calculated for the proposed nozzle is made of glass material. The study concentrates on the utilization of solar nozzles and their effect on wind energy. This study focused on and attempted to increase the local wind velocity (1 m/sec) in Kirkuk city in Iraq, to a higher velocity that could produce a large amount of kinetic energy which is then converted to generate power. Hence, increasing the efficiency of the plant. Results showed that wind velocity increases as the heat gain increases and the area decreased. The velocity at the converging position without including the solar radiation model reached about (15.1 m/sec), while in the case of enabling the solar radiation, it showed a value of (15.75 m/sec). As a result, the power produced from this proposed method has increased by a value of 74 W.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44775627","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}

引用次数: 1

Characterization and Analysis of Fish Waste as Feedstock for Biogas Production 鱼类废弃物作为沼气原料的特性与分析

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-26 DOI: 10.1093/ijlct/ctac135

Hortence Ingabire, Boniface Ntambara, Ezgad Mazimpaka

{"title":"Characterization and Analysis of Fish Waste as Feedstock for Biogas Production","authors":"Hortence Ingabire, Boniface Ntambara, Ezgad Mazimpaka","doi":"10.1093/ijlct/ctac135","DOIUrl":"https://doi.org/10.1093/ijlct/ctac135","url":null,"abstract":"\u0000 Fish waste (FW) is biodegradable waste that remains underutilized and causes a problem to the environment since the existing disposal techniques result in health risks and environmental pollution. FW has significant potential for producing biogas that decrease the reliance on fossil fuels because it contains easily biodegradable organic matter. The physicochemical analysis of the fish waste such as moisture content (MC) of 61.78 %, volatile solids (VS) of 93.94 %, total solids (TS) of 38.21 %, ash content (AC) of 0.52%, total organic carbon (TOC) of 54.2%, total kjeldahl nitrogen (TKN) of 9.2% and carbon to nitrogen (C/N) ratio of 5.89 % were considered and analyzed in this research. In addition, the methane potential was determined and obtained using gas detector. The results shown that the methane (CH4) content in fish waste was 50.12 % which was the potential feedstock of fish waste for biogas production. Nevertheless, the VS of fish waste was high which was good for this feedstock to be easily digested as the sign of producing biogas and demonstrates 99.9985% of performance rate. Finally, the FW had a lower C/N ratio compared to other biogas production waste. Future work needs to consider co-digestion with higher C/N ratio feedstocks.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42083283","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}

引用次数: 1

High-performance lithium-ion battery equalization strategy for energy storage system 储能系统高性能锂离子电池均衡策略

4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad068

Junxian Li, Cunqiang Huang, Xiangcheng Zhang, Xu Tian, Juan An

{"title":"High-performance lithium-ion battery equalization strategy for energy storage system","authors":"Junxian Li, Cunqiang Huang, Xiangcheng Zhang, Xu Tian, Juan An","doi":"10.1093/ijlct/ctad068","DOIUrl":"https://doi.org/10.1093/ijlct/ctad068","url":null,"abstract":"Abstract In pursuit of low-carbon life, renewable energy is widely used, accelerating the development of lithium-ion batteries. Battery equalization is a crucial technology for lithium-ion batteries, and a simple and reliable voltage-equalization control strategy is widely used because the battery terminal voltage is very easy to obtain. But when the battery voltage is used to determine whether the battery needs to end equalization, it often does not reflect the state of charge well, resulting in battery management system misjudgment, which makes it unable to achieve a better equalization effect. In this paper, we propose a high-performance equalization control strategy based on the equalization data of the general equalization strategy, which turns on the equalization again after the equalization is completed and uses the equalization time instead of the battery voltage as the indicator. In this paper, we analyse and test this principle in detail. The difference between the final voltage of the equalized battery and the target voltage is only 4 versus 3 mV, which is an extreme advantage compared with the error of 18 versus 24 mV of the general equalization strategy, and it adds almost no workload, which makes it a good prospect for application.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"21 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":"135003627","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}

引用次数: 0

Coupling optimization of hydropower and hydrogen systems considering energy supply safety culture 考虑能源供应安全文化的水电氢系统耦合优化

4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad080

Renlin Guo

{"title":"Coupling optimization of hydropower and hydrogen systems considering energy supply safety culture","authors":"Renlin Guo","doi":"10.1093/ijlct/ctad080","DOIUrl":"https://doi.org/10.1093/ijlct/ctad080","url":null,"abstract":"Abstract Although China's new energy power generation industry has developed, how to efficiently use clean energy and ensure safe supply needs further research. As a clean, pollution-free and high calorific value energy, hydrogen provides a solution for absorbing renewable energy and ensuring the stable operation of the power system. Based on the public goods attribute of system security and system operation behavior, this paper analyzes how to express the cultural value of energy supply security through economic means, and makes configuration adjustment under different interaction modes with the power grid, so as to achieve the effect of energy supply security. A multi-objective planning and operation optimization model is established, and the resource, social, economic and environmental benefits are analyzed. The model is solved by NSGA-II. The results show that the energy waste rate of hydrogen microgrid system can be reduced by 37.16%. The probability of power failure can be reduced to 0. Typical scenarios in both off-grid mode and grid-connected mode can increase economic income. In addition, up to more than 1000 tons of carbon emissions per day could be reduced under a typical scenario.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"12 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":"136047415","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}

引用次数: 0

Development and investigation of a pollutants emission reduction process from a coal-gasification power plant integrated with fuel cell and solar energy 燃料电池与太阳能相结合的煤气化电厂污染物减排工艺的开发与研究

4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad093

Doni Tri Putra Yanto, Ravil Akhmadeev, Hassan Salman Hamad, Ahmed Hussien Radie Alawadi, Abror Bozarboyevich Abdullayev, Rosario Mireya Romero-Parra, Hadi Fooladi

{"title":"Development and investigation of a pollutants emission reduction process from a coal-gasification power plant integrated with fuel cell and solar energy","authors":"Doni Tri Putra Yanto, Ravil Akhmadeev, Hassan Salman Hamad, Ahmed Hussien Radie Alawadi, Abror Bozarboyevich Abdullayev, Rosario Mireya Romero-Parra, Hadi Fooladi","doi":"10.1093/ijlct/ctad093","DOIUrl":"https://doi.org/10.1093/ijlct/ctad093","url":null,"abstract":"Abstract Even though coal resources are the most abundant among fossil fuels, coal-fired plants release large amounts of greenhouse gases into the atmosphere. In this regard, reducing environmental challenges and crises caused by coal burning can be a promising option to reduce today's crises in the energy field. The integration of coal-fired plants with renewable-driven energy systems can simultaneously improve thermodynamic performance and reduce pollutants emission rates. This article presents the thermodynamic and pollutant emission investigations of a new coal-fired plant coupled with a linear Fresnel solar collector (LFSC)-driven solar unit, a parabolic trough solar collector (PTSC)-driven solar unit, a high-temperature fuel cell stack (molten carbonate fuel cell stack [MCFCS]) and a heat recovery system (based on the steam turbine and gas turbine-based power cycles). The plant is able to produce electricity and hot water (HW). The main structure of the offered plant is based on coal, whereas, is coupled with renewables-based cycles to mitigate environmental impacts. The plant could generate ~ 207 MW of power and 3728 m3/h of HW. In such conditions, the energy efficiency of 73.1% and exergy efficiency of 44.18% could be achievable. Further, the emitted gas rates of the plant were nearly 403 tons/h. A comprehensive comparison is also presented for the plant's behavior under different types of coal (petcoke and anthracite). In addition, a two-function optimization is developed to determine the maximum value of exergy efficiency and the minimum value of total pollutants emission rate.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"12 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":"136047423","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}

引用次数: 0

Problems identification and performance analysis in small hydropower plants in Nepal 尼泊尔小型水电站的问题识别和性能分析

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad043

R. Pandey, R. Shrestha, Nawraj Bhattarai, Rabin Dhakal

{"title":"Problems identification and performance analysis in small hydropower plants in Nepal","authors":"R. Pandey, R. Shrestha, Nawraj Bhattarai, Rabin Dhakal","doi":"10.1093/ijlct/ctad043","DOIUrl":"https://doi.org/10.1093/ijlct/ctad043","url":null,"abstract":"Hydropower is powered by water, making it a clean source of energy. It contributes about 17% of worldwide annual energy generation and 90% of national energy generation, out of which 25% of its generation is contributed by small hydropower plants (SHPs). Thus, Nepal is predominantly dependent on a clean source of energy for power generation. In quantitative terms, approximately 70% of hydropower plants in Nepal are SHPs. Unfortunately, there are several bottlenecks to the smooth operation of these plants, viz. run-off-river hydropower with low water flow in dry season, insufficiency of proper guidance monitoring, regularization and inadequate and unfriendly policies. The study is based on primary and secondary data considering the SHPs spreading from eastern to western Nepal. Furthermore, the study follows the multicriteria decision analysis method to generalize the major issues at the sites. Inadequate water flow in the dry season is not the only issue for reduction in power generation; mechanical failure due to lack of monitoring and periodical maintenance is the predominant reason for the reduction in power output. This study discusses the role of reduction in water flow, unavailability of a trained workforce in rural hydropower areas, absence of appropriate equipment monitoring guidelines and inconsistent maintenance in the equipment failure and power production of hydropower plants. Every one in three SHPs has issues with smooth operation in terms of generation capacity, and overall, 50% of SHPs have mechanical issues as the major problem, which concludes the findings of the research.","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":"60777052","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}

引用次数: 1

Investigating the challenges and opportunities for sustainable waterfront development in Jeddah City 调查吉达市滨水区可持续发展的挑战和机遇

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad062

Sultan Khalid Zaki, I. Hegazy

{"title":"Investigating the challenges and opportunities for sustainable waterfront development in Jeddah City","authors":"Sultan Khalid Zaki, I. Hegazy","doi":"10.1093/ijlct/ctad062","DOIUrl":"https://doi.org/10.1093/ijlct/ctad062","url":null,"abstract":"The research paper discusses the challenges and opportunities surrounding sustainable waterfront development in Jeddah City, Saudi Arabia. The city faces several challenges such as inadequate infrastructure and hasty urbanization, but its strategic location, cultural heritage, and economic potential provide opportunities for sustainable development. The paper presents a comprehensive literature review of successful case studies from other cities and regions to identify the best practices and innovative methods for sustainable waterfront development in Jeddah City. The paper recommends green infrastructure, public–private partnerships and community-based planning and design to promote sustainable waterfront development. The paper emphasizes the need for an integrated and coordinated approach to waterfront development that focuses on enhancing resilience, preserving cultural heritage and promoting social equity. The paper suggests that further research is necessary to better understand the challenges and opportunities for sustainable waterfront development in Jeddah City. The areas that require attention include stakeholder engagement, the impact of climate change and the potential for alternative financing mechanisms. The findings of this research paper can guide policy makers, planners, developers and community leaders to make informed decisions toward sustainable waterfront development in Jeddah City.","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":"60777819","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}

引用次数: 1