Solar Compass最新文献_第2页

Study on the comparative performances of the solar stills with two different condensing glass cover shapes

Solar Compass Pub Date : 2024-12-22 DOI: 10.1016/j.solcom.2024.100103

P․Manoj Kumar

引用次数: 0

A holistic review of the effects of dust buildup on solar photovoltaic panel efficiency

Solar Compass Pub Date : 2024-12-14 DOI: 10.1016/j.solcom.2024.100101

Sufyan Yakubu , Ravi Samikannu , Sidique Gawusu , Samuel Dodobatia Wetajega , Victor Okai , Abdul-Kadir Seini Shaibu , Getachew Adam Workneh

{"title":"A holistic review of the effects of dust buildup on solar photovoltaic panel efficiency","authors":"Sufyan Yakubu , Ravi Samikannu , Sidique Gawusu , Samuel Dodobatia Wetajega , Victor Okai , Abdul-Kadir Seini Shaibu , Getachew Adam Workneh","doi":"10.1016/j.solcom.2024.100101","DOIUrl":"10.1016/j.solcom.2024.100101","url":null,"abstract":"<div><div>Understanding the drivers of photovoltaic system performance is very important in the backdrop of the increasingly significant role that solar energy plays in mitigating carbon emissions. Dust accumulation on surface of photovoltaic panel may result in a high degradation of PVs' efficiency with losses ranging from 10% in mild conditions to over 40% in arid regions. This review systematically explores the effects of dust deposition on PV performance, emphasizing the role of environmental factors such as wind speed, precipitation, humidity, and dust composition. Dust particles impede light transmission, raise cell temperatures, and increase resistive losses, leading to reduced output power. Notable efficiency reductions are linked to specific dust types, such as coal dust (up to 64% losses), fine sand (32%), and gypsum (30%), as highlighted by global case studies. This review further underlines how dust accumulation patterns are influenced by complex interactions of environmental factors such as wind precipitation and humidity. The installation characteristics, such as the height of the panels and their orientation, further exacerbate or mitigate the impact of soiling. This study has been designed to put a great deal of significance on the maximisation of solar PV efficiency, given the critical requirements for global renewable energy targets. It flags some promising cleaning methods and emphasises a holistic approach to the optimisation of PV system design and maintenance practices to empower the widespread adoption of this transformative clean energy solution.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"13 ","pages":"Article 100101"},"PeriodicalIF":0.0,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal placement and upgrade of solar PV integration in a grid-connected solar photovoltaic system

Solar Compass Pub Date : 2024-12-01 DOI: 10.1016/j.solcom.2024.100099

Edward Dodzi Amekah , Emmanuel Wendsongre Ramde , David Ato Quansah , Elvis Twumasi , Stefanie Meilinger , Thorsten Schneiders

{"title":"Optimal placement and upgrade of solar PV integration in a grid-connected solar photovoltaic system","authors":"Edward Dodzi Amekah , Emmanuel Wendsongre Ramde , David Ato Quansah , Elvis Twumasi , Stefanie Meilinger , Thorsten Schneiders","doi":"10.1016/j.solcom.2024.100099","DOIUrl":"10.1016/j.solcom.2024.100099","url":null,"abstract":"<div><div>The shift towards renewable energy sources has heightened the interest in solar photovoltaic (SPV) systems, particularly in grid-connected configurations, to enhance energy security and reduce carbon emissions. Grid-tied SPVs face power quality challenges when specific grid codes are compromised. This study investigates and upgrades an integrated 90 kWp solar plant within a distribution network, leveraging data from Ghana's Energy Self-Sufficiency for Health Facilities (EnerSHelF) project. The research explores four scenarios for SPV placement optimization using dynamic programming and the Conditional New Adaptive Foraging Tree Squirrel Search Algorithm (CNAFTSSA). A Python-based simulation identifies three scenarios, high load nodes, voltage drop nodes, and system loss nodes, as the points for placing PV for better performance. The analysis revealed 85 %, 82.88 %, and 100 % optimal SPV penetration levels for placing the SPV at high load, voltage drop, and loss nodes. System active power losses were reduced by 72.97 %, 71.52 %, and 70.15 %, and reactive power losses by 73.12 %, 71.86 %, and 68.11 %, respectively, by placing the SPV at the above three categories of nodes. The fourth scenario applies to CNAFTSSA, achieving 100 % SPV penetration and reducing active and reactive power losses by 72.33 % and 72.55 %, respectively. This approach optimizes the voltage regulation (VR) from 24.92 % to 4.16 %, outperforming the VR of PV placement at high load nodes, voltage drop nodes, and loss nodes, where the voltage regulations are 5.25 %, 9.36 %, and 9.64 %, respectively. The novel CNAFTSSA for optimal SPV placement demonstrates its effectiveness in achieving higher penetration levels and improving system losses and VR. The findings highlight the effectiveness of strategic SPV placement and offer a comprehensive methodology that can be adapted for similar power distribution systems.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100099"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on conversion of blanched grapes to raisins without chemicals through solar dryer to reduce drying time

Solar Compass Pub Date : 2024-12-01 DOI: 10.1016/j.solcom.2024.100098

Nitin Sharma, Namrata Sengar

{"title":"Experimental study on conversion of blanched grapes to raisins without chemicals through solar dryer to reduce drying time","authors":"Nitin Sharma, Namrata Sengar","doi":"10.1016/j.solcom.2024.100098","DOIUrl":"10.1016/j.solcom.2024.100098","url":null,"abstract":"<div><div>Solar dryers are solar thermal devices which increase the drying temperature and aid in moisture removal from the load, leading to faster drying of the agri-product as compared to the open sun drying. Conversion of grapes to raisins can be effectively achieved through solar dryers, and efforts are ongoing to improve the efficiency and further reduce the drying time. Usually in order to reduce the drying time for the conversion of grapes to raisins several pre-treatment methods with the use of chemicals are employed. In the present work pre-treatment in the form of blanching of grapes is adopted without the use of any chemicals to study the effect on the drying time in the solar dryer. The experimental results have been compared with the study of conversion of grapes to raisins with the same solar dryer without blanching. It is found that pre-treatment in the form of blanching resulted in a reduction in drying time to almost half. Experimental observations for the temperature profile studies relating to ambient temperature, air temperature inside the dryer, base plate temperature and solar radiation are presented in the form of graphs and calculations have been carried out for the estimation of drying rate and efficiency.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100098"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of solar photovoltaics on university buildings: A case study toward campus sustainability

Solar Compass Pub Date : 2024-12-01 DOI: 10.1016/j.solcom.2024.100100

Antônia Sônia Alves Cardoso Diniz , Gisele Mol da Silva , Raphaela E. Alves Nunes , Vinícius Augusto Camatta Santana , Daniel Sena Braga , Cristiana Brasil Maia

{"title":"Evaluation of solar photovoltaics on university buildings: A case study toward campus sustainability","authors":"Antônia Sônia Alves Cardoso Diniz , Gisele Mol da Silva , Raphaela E. Alves Nunes , Vinícius Augusto Camatta Santana , Daniel Sena Braga , Cristiana Brasil Maia","doi":"10.1016/j.solcom.2024.100100","DOIUrl":"10.1016/j.solcom.2024.100100","url":null,"abstract":"<div><div>Renewable energy leads Brazil's energy mix at about 82 % of its total, with solar photovoltaics (PV) now the second largest contribution to the electric power sector. The country's target to eliminate carbon emissions provides a significant role for higher-education institutions that shape and influence future societies through energy and education leadership. This paper focuses on the improvement of the sustainability level of the PUC Minas university campus in Belo Horizonte, Brazil, through the assessment and design of a PV system into the existing engineering building structures. The student-led case study provides an implementation roadmap that includes a coordinated methodology of evaluating the campus power and energy consumption, documenting the seasonal solar irradiance, evaluating the solar-available rooftop areas, simulating the daily and seasonal shadowing effects from existing surrounding structures, determining the panel placements following Brazil's codes and standards, and calculating the contributions of the PV to displacing grid-supplied electricity and potential lowering of the University's energy bills. The result is a realistic PV system design that meets the emission and electricity-cost reduction objectives, with a value-added aspect is that the lead team interfaced with ongoing Energy-Engineering course participants for real-time exposure to the research and photovoltaics technology. Additionally, the value analysis of the project is aimed at improving the University's Times Higher Education Ranking by addressing the United Nations Sustainability Development Goals (SDG) that correlate with the clean energy solar installation.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100100"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The macro view of solar policy: The case for supporting utility-scale power 太阳能政策的宏观视角：支持公用事业规模发电的理由

Solar Compass Pub Date : 2024-11-22 DOI: 10.1016/j.solcom.2024.100096

Andy Hira , Prasanna Krishnan

引用次数: 0

Determination of drying performance of different slice thicknesses from different cassava varieties using hybrid dryer 利用混合干燥器确定不同木薯品种不同切片厚度的干燥性能

Solar Compass Pub Date : 2024-11-10 DOI: 10.1016/j.solcom.2024.100097

Kodwo A. Budu , Joseph O. Akowuah , Emmanuel Y.H. Bobobee , Kojo A. Aikins , Albert K. Arkoh , Eric A. Asante

{"title":"Determination of drying performance of different slice thicknesses from different cassava varieties using hybrid dryer","authors":"Kodwo A. Budu , Joseph O. Akowuah , Emmanuel Y.H. Bobobee , Kojo A. Aikins , Albert K. Arkoh , Eric A. Asante","doi":"10.1016/j.solcom.2024.100097","DOIUrl":"10.1016/j.solcom.2024.100097","url":null,"abstract":"<div><div>Food provides most of the needed energy by humans to carry out their daily activities, but the issue of post-harvest losses is having an adverse effect on its production. In order to mitigate some of these post-harvest challenges, farmers in some of the developing countries have turned their attention on cassava production as the crop can provide food security. Cassava is also a drought resistant crop and can be left in the soil for a long time. However, cassava is equally one of the tuber crops with a very high deterioration rate. Numerous researches have been conducted in a way to find means of reducing these quick post-harvest losses with the emphases on drying. However, little information exists to show how wide variety of cassava sliced at different thicknesses perform when they are being dried, and how the principal dimensions of these dried chips can influence effective packaging. This study investigated the drying performance of seven cassava varieties sliced at three different thicknesses, and how their principal dimensions influenced effective packaging. The results obtained show that there was no obvious linear drying pattern for any of the cassava varieties. Again, CRI-Abrabopa had the highest drying time of 300 min., 240 min., and 210 min., for the 10 mm, 8 mm and 5 mm thick cassava slices, respectively. CRI-Dudzi was found to have been the variety to have lost more moisture with the highest drying rates of 0.0088 kg/min. for the 10 mm thick cassava slice, and 0.009 kg/min. for the 8 mm thick cassava slice. Moreover, Afisiafi obtained the lowest geometric mean diameter of 15.57 mm, 18.23 mm and 22.33 mm, accordingly for the 5 mm and 10 mm thick cassava slices, which made it easier for it to be packaged effectively</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100097"},"PeriodicalIF":0.0,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation of single slope solar still for culinary wastewater treatment 用于烹饪废水处理的单坡太阳能蒸馏器实验研究

Solar Compass Pub Date : 2024-10-21 DOI: 10.1016/j.solcom.2024.100095

Karthick Uthappan , Subramanian Murugesan , Ganesh Karuppasamy , Karthickmunisamy Thangavel

引用次数: 0

Opportunities to Enhance sCO2 Power Cycle Turbomachinery with Bearingless Motor/Generators 利用无轴承电机/发电机改进 sCO2 动力循环涡轮机械的机会

Solar Compass Pub Date : 2024-10-01 DOI: 10.1016/j.solcom.2024.100094

Takahiro Noguchi , WaiYan Chan , Nathan Petersen , Logan Rapp , Eric Severson

{"title":"Opportunities to Enhance sCO2 Power Cycle Turbomachinery with Bearingless Motor/Generators","authors":"Takahiro Noguchi , WaiYan Chan , Nathan Petersen , Logan Rapp , Eric Severson","doi":"10.1016/j.solcom.2024.100094","DOIUrl":"10.1016/j.solcom.2024.100094","url":null,"abstract":"<div><div>Thermal power cycles using sCO<sub>2</sub> as a working fluid place extreme demands on their turbomachinery components and their electric motors/generators. In this paper, new system topologies for sCO<sub>2</sub> turbomachinery are proposed which take advantage of “bearingless” electric machine technology to improve performance. Bearingless motors/generators are a new type of electric machine which integrate the functionality of active magnetic bearings into the existing hardware of an electric motor/generator. The existing electromagnetic surfaces and materials are reused to enable controllable production of radial forces on the machine shaft. This is envisioned to improve hermetic direct-drive turbomachinery systems by either augmenting existing bearings (i.e., bearing assist) or replacing existing bearings (i.e., bearing removal). The state-of-the-art technologies for several bearing types (gas foil bearings, externally pressurized porous (EPP) gas bearings, and active magnetic bearings) and electric machines are reviewed to motivate the introduction of bearingless technology. Two system designs using bearingless machines are proposed and compared against existing commercial solutions in terms of maximum shaft weight, number of passthroughs into the hermetic environment, cost, and complexity. A case-study bearingless motor/generator is assessed via simulations and a hardware prototype to investigate practical considerations for using bearingless technology in sCO<sub>2</sub> turbomachinery. The proposed bearingless solutions have potential to enable a new generation of sCO<sub>2</sub> turbomachinery with improved reliability, reduced complexity, and lower cost. This paper shows that by transforming the motor/generator already present in turbomachinery into a bearingless motor/generator, the technical challenges involved with sCO<sub>2</sub> can be overcome without adding significant cost.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100094"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy enhancement of building-integrated photovoltaic/thermal systems: A systematic review 建筑一体化光伏/供热系统的节能效果：系统综述

Solar Compass Pub Date : 2024-09-26 DOI: 10.1016/j.solcom.2024.100093

Hussein A. Kazem , Miqdam T. Chaichan , Ali H.A. Al-Waeli , K. Sopian , Naser W. Alnaser , Waheeb E. Alnaser

引用次数: 0