International Journal of Low-carbon Technologies最新文献_第9页

Optimal placement of locally controlled voltage regulators in traditional distribution systems using the IMDE algorithm 基于IMDE算法的传统配电系统局部控制稳压器优化配置

4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad066

Mehrdad Ahmadi Kamarposhti, Hassan Shokouhandeh, Sun-Kyoung Kang, Ilhami Colak, El Manaa Barhoumi, Kei Eguchi

{"title":"Optimal placement of locally controlled voltage regulators in traditional distribution systems using the IMDE algorithm","authors":"Mehrdad Ahmadi Kamarposhti, Hassan Shokouhandeh, Sun-Kyoung Kang, Ilhami Colak, El Manaa Barhoumi, Kei Eguchi","doi":"10.1093/ijlct/ctad066","DOIUrl":"https://doi.org/10.1093/ijlct/ctad066","url":null,"abstract":"Abstract One of the main goals of the designers of the power systems is the reduction of extra systems costs. The main part of these costs is related to energy loss, and the methods for loss reduction significantly lead to a cost reduction. The voltage regulators (VRs) can be used along the distribution feeders and the improvement of the network voltage profile results in the loss reduction of the system. However, the important problem is the installation location of this equipment to have the most profitability with the lowest cost. In this paper, the optimal placement of the VRs along the distribution systems is performed using intersect mutation differential evolution algorithm. The method aims to reduce loss and the primary investment and maintenance of the VRs. To this aim, the studies are performed on two scenarios for two standard distribution systems with 33 and 69 buses. A genetic algorithm (GA) is also utilized for the VRs placement to validate the results. The results show that the VRs reduce the loss to about 15% of the maximum system load. Moreover, the improved differential evolution algorithm performs better than the GA and makes the objective function in the minimum value.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"49 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":"135001742","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

A novel synthesis of light transmission from upcycled polyethylene terephthalate polymer and low-density polyethylene for greenhouse design in tropical climate 利用再生聚对苯二甲酸乙二醇酯聚合物和低密度聚乙烯合成一种用于热带气候温室设计的新型透光材料

4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad100

Jitiporn Wongwatcharapaiboon, Chanikarn Chankasem, Pusit Lertwattanarak, Saffa Riffat

{"title":"A novel synthesis of light transmission from upcycled polyethylene terephthalate polymer and low-density polyethylene for greenhouse design in tropical climate","authors":"Jitiporn Wongwatcharapaiboon, Chanikarn Chankasem, Pusit Lertwattanarak, Saffa Riffat","doi":"10.1093/ijlct/ctad100","DOIUrl":"https://doi.org/10.1093/ijlct/ctad100","url":null,"abstract":"Abstract To support the circular economy in Thai’s agriculture, the main interviewed challenges point to knowledge and knowhow for greenhouse structure and system boosting up productivities. One popular material that possibly affected productivity is transparent polymer film, which can be recycled based on material property and blowing machine condition. This paper investigates the light transmittance performance of transparent polyethylene terephthalate polymer (PET) and low-density polyethylene (LDPE) sheets for use in low-energy greenhouses in tropical climates. The aim of the study is to optimize the thermal performance and light transmittance of these materials to support plant growth and human comfort. The study focuses on seven stages of plant growth, each of which requires different light characteristics including 1) seed, 2) germinating, 3) young seedling, 4) older vine, 5) flowering, 6) fruit bearing and 7) harvesting and drying. Each stage requires different light characteristics, e.g. light intensity, red light, blue light, white light and ultraviolet (UV) and pulsed light (PL). The methodology involves selecting PET and LDPE materials, preparing samples for thermal property and lighting laboratory tests and analysing the results based on suitable criteria. The findings show that LDPE sheets have 28.78% lower light transmittance than PET sheets, making them suitable for supporting the seedling stage and older vines of plant growth. PET sheets, on the other hand, deliver a high intensity of red light, making them suitable for stimulating photosynthesis in older vines and during the harvesting process. The study highlights the importance of considering both thermal performance and light transmittance when selecting materials for low-energy greenhouses in tropical climates.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"23 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":"136302911","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

Potential measurement of electricity supply 电力供应的电位测量

4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctac072

Mehdi Jahangiri, Mohammad Khorsand Dehkordi, Sahar Khorsand Dehkordi

{"title":"Potential measurement of electricity supply","authors":"Mehdi Jahangiri, Mohammad Khorsand Dehkordi, Sahar Khorsand Dehkordi","doi":"10.1093/ijlct/ctac072","DOIUrl":"https://doi.org/10.1093/ijlct/ctac072","url":null,"abstract":"Abstract Hydrogen has a therapeutic effect in a wide range of diseases and its presence in medical centers is essential. Hydrogen can increase efficiency along with renewable energy systems (green hydrogen). Due to the importance of the above, in the present work for the first time, the feasibility of hydrogen production on a hospital scale using water electrolysis by wind, solar and biomass energies has been investigated. The aim of the present work is to supply renewable electricity to four hospital hydrogen generators of MD-H2 400 model. Technical-economic-environmental-energy analyses were performed by HOMER 2.81 software and the study site is Shahrekord, the capital of Chaharmahal and Bakhtiari province. The results showed that the lowest cost per kWh of electricity generated for a system disconnected from the grid with a value of $0.251 related to the system including 8 kW solar cell, 1 kW diesel generator, 9 batteries and 2 kW electric converter that the effect of temperature on performance solar cells is included. For this superior scenario, 154 kg of CO2 emissions is generated annually because 3% of the required electricity is supplied by a diesel generator. Another point that can be seen from the results is that not considering the temperature in the performance of solar cells in the study area causes some errors in the calculations and increases the levelized cost of energy parameter. This issue has not been considered in many past works and the current work in this field has an advantage.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"390 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":"136047609","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

Novel temperature test method for aroma and filter materials 香气和过滤材料的新型温度测试方法

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctac113

Hong Qian, Kao Wu, Yuhang Cheng, Chong Li, Juan Wang, Fatang Jiang

{"title":"Novel temperature test method for aroma and filter materials","authors":"Hong Qian, Kao Wu, Yuhang Cheng, Chong Li, Juan Wang, Fatang Jiang","doi":"10.1093/ijlct/ctac113","DOIUrl":"https://doi.org/10.1093/ijlct/ctac113","url":null,"abstract":"A good aromatherapy experience of an incense stick with filter material depended heavily on the barrier effect of the filter material particles and the comfort temperature of the aroma. The lack of accurate methods to determine the aroma temperature greatly hindered the quality control and product development of aromatherapy. In this study, a novel method was proposed to measure the temperature of the filter material and aroma with an negative temperature coefficient thermistor and a needle thermocouple. The experimental results showed that the measurement accuracy of this method was up to ±0.01°C, and the surface temperature distribution of the filter media and the extracted aroma temperature can be obtained quickly and accurately. It was found that under the two different heating methods, the aroma temperature produced by heating non-combustion was significantly higher than that produced by the non-flaming combustion. Different aroma delivery intervals also had significant effects on the aroma. This paper showed that this novel method could contribute to quality evaluation of filter sticks for aromatherapy products.","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":"60776577","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 of hybrid super-capacitor and lead-acid battery power storage systems 超级电容器与铅酸电池混合动力存储系统的发展

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctac140

Guangyue Gu, Youliang Lao, Yaxiong Ji, Shasha Yuan, H. Liu, Peng Du

引用次数: 0

Research on the factors influencing college students’ energy-use behavior in dormitories: group-level factors and time factors 大学生宿舍能源使用行为的影响因素研究:群体层面因素和时间因素

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad071

Xiaodan Liu, Yanping Yang, Liang Guo, Ling Liao, Lin Xiao

{"title":"Research on the factors influencing college students’ energy-use behavior in dormitories: group-level factors and time factors","authors":"Xiaodan Liu, Yanping Yang, Liang Guo, Ling Liao, Lin Xiao","doi":"10.1093/ijlct/ctad071","DOIUrl":"https://doi.org/10.1093/ijlct/ctad071","url":null,"abstract":"Promoting energy-saving behavior among college students in dormitories is conducive to improving the energy efficiency of college buildings. As students in the same dormitory need to share the energy-using equipment and expenses, they will inevitably influence each other by their energy-use behaviors, and this interaction process will gradually reach a certain stable state with the passing of the time spent with roommates. However, the existing research on the influencing factors of energy-use behaviors often focuses on individual subjective characteristics while overlooking the influence of group and time factors. Therefore, this paper incorporates interpersonal relationship and group identity into the theory of planned behavior, and considers the time spent with roommates as the moderating variable to build a model of factors influencing college students’ energy-use behaviors in their dormitories. Empirical data were collected by a questionnaire survey with 768 respondents, and generalized ordered logit regression was used to analyze the research model. The results reveal that the factors that influence students’ energy-use behaviors will change with the time spent with roommates. When the time spent with roommates is 0–1 year, interpersonal relationships, group identity, comfort, individual norms, and environmental concerns are significant influences. When the time spent with roommates is 1–2 years, environmental concerns will no longer have an effect; however, energy-use costs and energy-use habits will be added. When the time spent with roommates is 2–3 years, interpersonal relationships, individual norms, group identity, and energy-use costs will no longer have any influence, but subjective norm will be added.","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":"60778147","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

Economic analysis of retired batteries of electric vehicles applied to grid energy storage 电动汽车退役电池应用于电网储能的经济性分析

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad076

Jialu Li

引用次数: 1

Experimental validation of membrane distillation unit coupled with direct contact membrane using solar energy 膜蒸馏装置与太阳能直接接触膜耦合的实验验证

IF 2.3 4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad011

K. Zarzoum, M. Alquraish, K. Zhani, H. B. Bacha

{"title":"Experimental validation of membrane distillation unit coupled with direct contact membrane using solar energy","authors":"K. Zarzoum, M. Alquraish, K. Zhani, H. B. Bacha","doi":"10.1093/ijlct/ctad011","DOIUrl":"https://doi.org/10.1093/ijlct/ctad011","url":null,"abstract":"This paper presents an experimental validation of membrane distillation unit using solar energy which is coupled with direct contact membrane, which is placed at Kairouan University, Tunisia (35 N, 10 E) and tested on several sunny days. This unit is located as part of a cooperation project research and development between German Institute for Solar Energy Systems and Tunisian Electromechanical Systems Laboratory named: Solar driven membrane distillation for resource efficient desalination in remote areas. A theoretical model investigation as well as experimental is carried out. A mathematical model based on heat and mass transfers of the membrane distillation unit has been presented in this paper. The obtained global model of the membrane distillation unit has been converted to a set of algebraic system of equations to render them ordinary. To compare the experimental and numerical data of the mathematical model of the membrane distillation unit an example of the validation process that has been presented to assess the credibility of the obtained numerical model of membrane distillation unit, a laptop simulation program based on the global model of the unit is simulated by C++ software to solve the model of solar irradiation and all temperature on the journal productivity of the membrane distillation unit. It was shown by this study that the global mathematical model of the unit is able to predict accurately the trends of the thermal characteristic of the membrane distillation unit.","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":"60777145","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

Carbon assessment and cost accounting of a shared building based on the life cycle assessment 基于生命周期评价的共享建筑碳评估与成本核算

4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad092

Yi Lei, Lili Dong

{"title":"Carbon assessment and cost accounting of a shared building based on the life cycle assessment","authors":"Yi Lei, Lili Dong","doi":"10.1093/ijlct/ctad092","DOIUrl":"https://doi.org/10.1093/ijlct/ctad092","url":null,"abstract":"Abstract The transformation toward carbon neutrality is crucial, especially within the building industry, which is a significant carbon source. Building carbon accounting is fundamental to enable designers to undertake decarbonisation efforts, yet it remains a less mature field. This paper aims to assess carbon emissions and conduct cost accounting for a shared building using life cycle assessment (LCA) method. Beyond this, this paper also focuses on cost accounting associated with decarbonising efforts. The primary objective is to uncover the sustainability characteristics of shared buildings and establish a foundation for future decarbonisation decision-making. To achieve these goals, this paper first analyses various LCA techniques. Second, the carbon cost accounting model and method are discussed in aspects of five stages across the building life cycle. Third, the carbon emissions and cost accounting of an actual project involving an intelligently designed shared building are examined. The results reveal important insights. The intelligent design stage exhibits the lowest carbon emission, constituting a mere 0.002% of the total, whereas the use and maintenance stage shows the highest carbon emission, representing approximately 65.45% in proportion. In addition, the demolition and disposal stage demonstrates negative emissions (~7.1% of the total), indicating its contribution to decarbonisation. On the decarbonisation costs, material production and transportation contribute the largest proportion, ~67.38%, with the greatest potential for decarbonisation optimization. Overall, this paper provides essential insights into building carbon emission assessment in different stages, offering valuable guidance for architects, designers and engineering to optimise decarbonisation strategies.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"233 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":"134889520","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

Calculation model and application of ecological water demand of watercourses in low-carbon sponge urban areas based on DPSA algorithm 基于DPSA算法的海绵低碳城市河道生态需水量计算模型及应用

4区工程技术

International Journal of Low-carbon Technologies Pub Date : 2023-01-01 DOI: 10.1093/ijlct/ctad102

Tianming Zhang, Xiaoliang Xu

{"title":"Calculation model and application of ecological water demand of watercourses in low-carbon sponge urban areas based on DPSA algorithm","authors":"Tianming Zhang, Xiaoliang Xu","doi":"10.1093/ijlct/ctad102","DOIUrl":"https://doi.org/10.1093/ijlct/ctad102","url":null,"abstract":"Abstract To improve the prediction ability of river ecological water requirement in sponge low-carbon urban areas, a prediction model of it based on big data analysis was proposed. A statistical analysis model of river ecological water requirement in sponge and low-carbon urban areas was established. Differential Particle Swarm Optimization Algorithm (DPSA) was used to calculate the characteristic quantity of river ecological water requirement in sponge and low-carbon urban areas. The detection model of ecosystem hydrothermal balance and lognormal distribution time series of groundwater level were constructed for the prediction of river ecological water requirement in sponge and low-carbon urban areas. Combined with the integrated control method of river ecological environment water demand forecasting and information exchange, a decentralized control model of river ecological water demand in low-carbon sponge urban areas was established. Through applicability analysis and model measurement analysis, combined with comprehensive index measurement, the prediction model of river ecological water requirement in low-carbon sponge urban areas was optimized. The empirical analysis results show that this method has good adaptability and high prediction accuracy for the prediction of river ecological water requirement in sponge low-carbon urban areas and improves the reliability of the prediction of river ecological water requirement and the matching level of urban ecological environment.","PeriodicalId":14118,"journal":{"name":"International Journal of Low-carbon Technologies","volume":"18 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":"136302884","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