Solar Compass最新文献

{"title":"Experimental study on conversion of blanched grapes to raisins without chemicals through solar dryer to reduce drying time","authors":"Nitin Sharma,&nbsp;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}

{"title":"Optical analysis and design of a novel solar beam down concentrator for indoor cooking","authors":"Dev Banitia ,&nbsp;Siddharth Ramachandran ,&nbsp;Satya Sekhar Bhogilla ,&nbsp;P.K. Vijayan","doi":"10.1016/j.solcom.2024.100083","DOIUrl":"10.1016/j.solcom.2024.100083","url":null,"abstract":"<div><p>This investigation provides the design and optical analysis of an innovative solar beam-down configuration, which can be a promising passive solution for indoor solar-based cooking, offering an eco-friendly and sustainable approach. The system uses a beam-down parabolic dish concentrator to concentrate the solar radiation onto a ground-mounted receiver module, which has a secondary optical module consisting of a secondary reflector-light pipe system. The receiver module is a well-insulated tank consisting of a receiver in contact with a primary heat transfer fluid. The thermal energy stored in the receiver module is transported via a secondary heat transfer fluid to and from the cooktop via a tube-in-tube arrangement, which induces a thermosyphon effect. A multi-variable optical analysis through an efficient ray tracing methodology has been adopted to identify optimal design values of optical components such as parabolic dish concentrators, secondary reflectors, and light pipe-receiver assemblies. The optimal optical design parameters and their corresponding ray trace analysis results are elaborated. It was found that the designed beam-down parabolic dish concentrator system provides an ideal thermal energy of 10.3 kWh per day at an average DNI of 650 W/m². Further, this investigation provides a design for a beam-down parabolic dish concentrating system that may be used for efficient and sustainable solar energy solutions.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100083"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772940024000171/pdfft?md5=1344265947fae8727875e99b29b6b4c5&pid=1-s2.0-S2772940024000171-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142047960","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}

{"title":"Supporting strategy for investment evaluation of photovoltaic power generation engineering projects using multi-criteria decision analysis methods","authors":"Panagiotis Raptis ,&nbsp;Georgios Aretoulis","doi":"10.1016/j.solcom.2024.100092","DOIUrl":"10.1016/j.solcom.2024.100092","url":null,"abstract":"<div><p>This scientific study examines the evaluation of photovoltaic power generation projects through the application of multi-criteria decision analysis methods. Two groups of large-scale grid-connected PV power generation system projects with a nominal power of 50 MW and 500 MW respectively were analyzed and evaluated. These systems were designed to be installed in the same wider geographical area in northern Greece, but they were differentiated in the part of the PV circuit. Twelve systems were analyzed in which either monocrystalline silicon panels or poly-crystalline silicon panels or bifacial photovoltaic panels were to be installed. In these systems either central photovoltaic inverters or photovoltaic string inverters were considered for installation. The following criteria were used to evaluate the investment in these projects. These criteria were related to the profitability, the financial cost, the technical level, and the electrical energy production of the systems and these were the initial investment cost, the operation and maintenance cost, the levelized cost of electricity, the net present value, the internal rate of return, the capital recovery or payback period, the technical level of the photovoltaic circuit, the technical maturity of the photovoltaic circuit, and the annual electricity production. The evaluation of these criteria was initially conducted with fixed weighting coefficients followed by a sensitivity analysis of these weighting coefficients. The results of the evaluation using the PROMETHEE, AHP and TOPSIS multi-criteria decision analysis methods showed that the PV power generation systems which should be preferred are those with increased nominal power, where monocrystalline silicon technology panels are employed following the central inverter topology.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100092"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772940024000262/pdfft?md5=330f3b7b5a6de4073d3dd53d403fe758&pid=1-s2.0-S2772940024000262-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272415","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}

{"title":"Assessing economic viability and environmental impact of solar-powered EV charging station in Gazipur, Bangladesh: A case study","authors":"M. Naem Hossain ,&nbsp;Muhammad Mahmood Hasan ,&nbsp;M. Ahsan Habib ,&nbsp;Fatin Bin Ferdous ,&nbsp;Sazid Rahman","doi":"10.1016/j.solcom.2024.100091","DOIUrl":"10.1016/j.solcom.2024.100091","url":null,"abstract":"<div><p>Due to technological advancement and modernization, the demand for Electric Vehicles (EVs) is rising. In Bangladesh, there is a growing demand for electric vehicles such as auto-rickshaws and easy bikes, and electric automobiles will be familiar soon. The demand for electrically powered vehicles is increasing in response to growing environmental concerns; it helps balance the greenhouse effect and global warming. Solar-based charging systems are becoming increasingly popular due to their low greenhouse gas (GHG) emissions. The CO₂ emissions produced by solar-based EV charging systems are lower than those produced by coal-based chargers. Moreover, the Government of Bangladesh wants to accomplish Sustainable Development Goal (SDG) 7 by 2030 by increasing the proportion of accessible, cutting-edge, renewable energy sources. This study investigates and analyses the technological, economic, and ecological viability of a solar PV power plant in Bangladesh for charging EVs. This study examined solar-based EV charging stations, which generate 36,785.76 MWh of electricity for 20 years of their lifetime and are used to charge EVs. Furthermore, the net present value (NPV) is USD 652,656.80, the initial investment is USD 1,365,300, the Internal Rate of Return (IRR) is 11.70 %, and the Payback Period (PBP) is 7.2 years. Approximately per day, 250 battery-operated three-wheeler EVs can be charged using the generated electricity. In addition, the project will prevent the emission of 24,013.86 tons of CO₂, 251.25 tons of SO₂, 63.39 tons of NO_x, and 12.55 tons of CO. Eliminating these GHG emissions may also aid Bangladesh in achieving SDG 13.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100091"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772940024000250/pdfft?md5=3efd21fc4512d52d7f9924b302fbe9c6&pid=1-s2.0-S2772940024000250-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142229629","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}

{"title":"Decarbonizing the electricity sector using terawatt-scale interconnected photovoltaic power grids to meet the climate goals: A comprehensive review and a strategic roadmap","authors":"Saikat Ghosh ,&nbsp;Jatindra Nath Roy ,&nbsp;Chandan Chakraborty","doi":"10.1016/j.solcom.2024.100088","DOIUrl":"10.1016/j.solcom.2024.100088","url":null,"abstract":"<div><div>High scalability and quick deployability of solar photovoltaic (PV) make it an ideal candidate for rapid decarbonization of electricity. The typical SPV generation profile and power grids designed for conventional power plants (PP) are the major obstacles to maximizing SPV utilization. While energy storage systems (ESS) are often deemed critical, scalable ESS are site-limited, highly dependent on rare-earth elements, and either have higher embodied energy and emissions or low round-trip efficiencies. This manuscript demonstrates that by strategically interconnecting SPV power plants longitudinally, PV can meet base load demands and extend availability beyond peak-solar hours, thereby reducing the need for ESS and replacing existing carbon-intensive electricity infrastructure. It is demonstrated by modelling two 12 GW longitudinally separated transmission lines interconnecting SPVPPs situated 40° (case-1) and 90° (case-2) apart can provide PV electricity beyond solar hours for 4.69 and 7.33 equivalent hours (daily average), respectively. For cases 1 and 2, the lithium battery-ESS route can result in 4.76 and 3.35 times more carbon emissions and cost 4.23 and 2.98 times more than the transmission route, respectively, for providing the same energy over the transmission line's 40-year lifespan. Technologies such as multi-terminal ultra-high-voltage-DC grids, hybrid superconductive cables, new semiconductor materials for PV and energy systems, etc. are explored for the globally interconnected solar grid. Findings suggest 90 TWp of PV capacity can supply a significant portion of world's energy demand by 2050. This study outlines a comprehensive approach to build a sustainable and interconnected global solar energy infrastructure that aligns with climate objectives.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100088"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326672","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}

{"title":"Determination of drying performance of different slice thicknesses from different cassava varieties using hybrid dryer","authors":"Kodwo A. Budu ,&nbsp;Joseph O. Akowuah ,&nbsp;Emmanuel Y.H. Bobobee ,&nbsp;Kojo A. Aikins ,&nbsp;Albert K. Arkoh ,&nbsp;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":"2024-12-01","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}

{"title":"Technical, economic and environmental assessment and optimization of four hybrid renewable energy models for rural electrification","authors":"Kelvin Nkalo Ukoima ,&nbsp;Okoro Ogbonnaya Inya ,&nbsp;Akuru Udochukwu Bola ,&nbsp;Davidson Innocent Ewean","doi":"10.1016/j.solcom.2024.100087","DOIUrl":"10.1016/j.solcom.2024.100087","url":null,"abstract":"<div><p>This work investigates the technical, economic and environmental feasibility of four solar – wind off grid hybrid renewable energy system (HRES) models to provide electrification for Okorobo-Ile town in Andoni Local Government Area of River State, Nigeria using the Hybrid Optimization of Multiple Electric Renewables (HOMER) software. In particular, investigation of the possible inclusion of a fuel cell (FC) system is performed. The four considered models are: pv/wind/battery (PWB); pv/wind/battery/gen-set (PWBG), pv/wind/fuel-cell (PWF) and pv/wind/battery/fuel-cell (PWBF). The best cost-effective configuration among the set of systems were examined for the electricity requirement of 677.75 kWh/day primary load with 99.1 kW peak load. Results obtained showed that the net present cost (NPC) are $615,664.95, $679,348.17, $778,834.22 and $3,534,850.54 respectively for the PWB, PWBG, PWBF and PWF. The cost of energy (COE) was lowest for the PWB with a value of $$0.158 and highest for the PWF with a value of $0.964. The renewable options—PWBF and PWF have higher long-term costs but offer cleaner emissions. In contrast, options with the Diesel-Powered Generator is cost-effective but has a high environmental impact in terms of greenhouse gas emissions and noise pollution. These emissions include 3,758 kg/yr CO₂, 23.7 kg/yr CO and a total of 32.67 kg/yr of unburned hydrocarbons, sulfur dioxide, particulate matter and nitrogen oxides. Based on the results, a stand - alone HRES that consist of 166 kW PV panels, 3 wind turbines 29 batteries and 123 kW converter is found to be the best configuration for the village, as it leads to minimum net present cost (NPC) and COE. The PWB system offers the best choice for the community by balancing financial considerations with sustainability which is crucial when making energy system choices. Results also show that while hydrogen, FC system and the electrolyzer can be used together with or without batteries, inclusion of the FC system resulted in the high NPC due to their high cost of investment.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100087"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772940024000213/pdfft?md5=c0f26d79aa639cbe5300db871badcdaf&pid=1-s2.0-S2772940024000213-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097823","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}

{"title":"A review of concentrated solar power status and challenges in India","authors":"Anil Kumar Yadav ,&nbsp;Anil Kumar ,&nbsp;Shailendra Sinha","doi":"10.1016/j.solcom.2024.100079","DOIUrl":"10.1016/j.solcom.2024.100079","url":null,"abstract":"<div><p>Concentrated Solar Power (CSP) technology has emerged as a promising renewable energy solution, offering a sustainable and efficient means of electricity generation and thermal energy storage. India, endowed with abundant solar irradiance, has made significant strides in promoting CSP technology as part of its renewable energy portfolio. With a growing focus on reducing greenhouse gas emissions and enhancing energy security, the Indian government has initiated numerous policies, incentives, and projects to encourage CSP adoption. Parabolic trough collectors, a type of linear concentrating system, are currently in widespread use. Power or solar towers are the most common type of point concentrating CSP technology currently in use. India aims to achieve a renewable energy capacity of 175 GW by 2022, with solar power constituting 100 GW of the overall target. Concentrated solar power technology is slated to grow 87% during 2018–2023, 32% faster than in the previous five-year period 2012–2017 and reach 4.3 GW in 2023. In future, present review paper can be regarded as a valuable resource for researchers, policymakers and industry professionals seeking to comprehend the present condition of concentrated solar power in India. It can aid in the development of strategies to address obstacles and advance sustainable and efficient solar energy solutions.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100079"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772940024000134/pdfft?md5=20525f4931ca5cf71d43c87bdaf80d6d&pid=1-s2.0-S2772940024000134-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141963140","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}

{"title":"Application of three Transformer neural networks for short-term photovoltaic power prediction: A case study","authors":"Jiahao Wu ,&nbsp;Yongkai Zhao ,&nbsp;Ruihan Zhang ,&nbsp;Xin Li ,&nbsp;Yuxin Wu","doi":"10.1016/j.solcom.2024.100089","DOIUrl":"10.1016/j.solcom.2024.100089","url":null,"abstract":"<div><p>In order to solve the potential safety hazards caused by the fluctuation of photovoltaic (PV) power generation, it is necessary to predict it in advance and take countermeasures as soon as possible. Based on the three models of vanilla Transformer, Informer, and Autoformer, this paper considers three prediction scenarios: zero-cost prediction, low-cost prediction, and high-cost prediction, and realizes the power prediction under two prediction horizons of 4 h and 24 h for a matrix of a centralized PV power station in Hubei Province, China. The results of some configurations meet the industry-recommended metric requirements, and the overall performance of the vanilla Transformer is better than Informer and Autoformer. After comparing the three models and different prediction intervals, and considering the practical industrial demand, this paper gives recommended configurations for both 4 h and 24 h predictions. The practical rolling prediction performance of the recommended configurations demonstrates the applicability and flexibility of the proposed methods.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100089"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772940024000237/pdfft?md5=594e66ba68e3b10bd886384b21fc172f&pid=1-s2.0-S2772940024000237-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238479","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}

{"title":"Experimental investigation of single slope solar still for culinary wastewater treatment","authors":"Karthick Uthappan ,&nbsp;Subramanian Murugesan ,&nbsp;Ganesh Karuppasamy ,&nbsp;Karthickmunisamy Thangavel","doi":"10.1016/j.solcom.2024.100095","DOIUrl":"10.1016/j.solcom.2024.100095","url":null,"abstract":"<div><div>Solar still desalination (SD) offers a sustainable method for purifying contaminated water, despite its productivity limitations. This study proposes an effective treatment process for culinary wastewater (CWW), multilayer-filtered culinary wastewater (MFCWW), and borewell water. We conducted a comprehensive experimental analysis comparing key SD characteristics, including evaporative heat transfer, efficiency, productivity, exergy, and water quality parameters, across these water sources. Our findings reveal that integrating multilayer filtration with CWW significantly improves efficiency, productivity, turbidity reduction, and hardness removal compared with untreated CWW. Notably, MFCWW has emerged as the most promising modification, demonstrating enhanced solar still performance over conventional SD processes. This study highlights the potential of combining multilayer filtration with solar desalination as an innovative approach to improve water purification outcomes, particularly for culinary wastewater treatment.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"12 ","pages":"Article 100095"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573514","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}