Solar Compass最新文献

{"title":"Conception, Realization and Testing of a Solar Cooker Built with Ring Array Concentrator - RAC in sub Saharan region","authors":"Thierry Sikoudouin Maurice Ky ,&nbsp;Ibrahim Sorgho ,&nbsp;Sayoba Sawadogo ,&nbsp;Dieudonné Dabilgou ,&nbsp;Salifou Ouédraogo ,&nbsp;Adama Ouédraogo ,&nbsp;Sié Kam ,&nbsp;Dieudonné Joseph Bathiebo","doi":"10.1016/j.solcom.2023.100056","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100056","url":null,"abstract":"<div><p>A Ring Array Concentrator - RAC was conceived, realized and tested for cooking purpose in Burkina Faso where irradiation flux is about 5.5kWh/m<span><math><msup><mrow></mrow><mn>2</mn></msup></math></span>/day. The RAC, having a useful aperture area of 1.692 m<span><math><msup><mrow></mrow><mn>2</mn></msup></math></span>, was built with five (5) imbricated conical concentrators. The conceived RAC has a mean geometric concentration ratio evaluated to 38, allowing a transmitted temperature of 330<span><math><msup><mrow></mrow><mo>∘</mo></msup></math></span>C to the receiver’s fluid, supposing a possible cooking time of 6 hours and with a theoretical efficiency from 36% to 40%. This is therefore suitable for cooking, frying and roasting. Water was boiled from October 13th to 15th, 2021 and frying oil was raised up to 132<span><math><msup><mrow></mrow><mo>∘</mo></msup></math></span>C in October 21st and 22nd, 2022. One (1) kg of potatoes was fried and another kg of meat brochettes were roasted for experimental purpose, supporting the fact that RAC systems could be used efficiently to cook in Burkina Faso, a Sub Saharan country. The weak points of the system, such as the sharp decrease of the mean geometric concentration ratio compared to parabolic RAC and the fact that sun rays come from above, could even be improved by the multiplication of the cones and the channeling of the sun rays by multiple reflections. The RAC could therefore be implemented as a clean cooking technology in an area where abusive wood and Charcoal cooking is still widely in place in suburban areas.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"7 ","pages":"Article 100056"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of forecasting method of time variation of net solar output over wide area using grand data based neural network","authors":"Chikako Dozono,&nbsp;Shin-ichi Inage","doi":"10.1016/j.solcom.2023.100050","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100050","url":null,"abstract":"<div><p>This paper focuses on the short-term forecasting of the temporal variation in the net output of photovoltaic power generation across a wide area. Due to the unstable output fluctuations of photovoltaic power generation, thermal power generation is necessary. However, to handle unpredictable power fluctuations, thermal power often operates in a no-load standby mode, resulting in wasteful energy consumption. To address this issue, we have developed a novel prediction method that utilizes neural networks for short-term forecasting of the net output of photovoltaic power generation in a wide area. The key aspect of this method is the utilization of the distributed solar power generation itself as a sensor within the target area, enabling the use of BIG DATA derived from the sensor to predict future net output of solar power generation using a neural network. To expedite calculations, we have incorporated an autoencoder and a decoder. We applied this methodology to northern Kyushu and conducted thorough verification. Furthermore, we compared the persistent model with the smart persistent model and demonstrated their effectiveness as viable solutions.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"7 ","pages":"Article 100050"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solar powering public health centers: A systems thinking lens","authors":"Rachita Misra ,&nbsp;Huda Jaffer","doi":"10.1016/j.solcom.2023.100052","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100052","url":null,"abstract":"<div><p>Around 300,000 women around the world die every year due to complications during pregnancy and childbirth. An estimated 19.9 million children do not receive critical vaccinations putting them at serious risk of potentially fatal diseases. These risks and deaths are preventable with appropriate management and care. Access to healthcare in low resource settings requires a comprehensive approach that strengthens infrastructure, systems, and medical and human resources. The lack of access to energy within infrastructure strengthening dramatically contributes to the immense healthcare challenge faced by developing countries. Electricity is essential for access to health services, as essential as the healthcare center, human resources, equipment, medicines etc. Universal Health Coverage cannot be achieved without energy access in healthcare facilities.</p><p>Healthcare today, without counting the potential services to the un-catered populations in the world, contributes to GHG emissions, equivalent to the 5th most polluting country in the world. Furthermore, if we must meet the goals of access to health today, it cannot be considered via traditional models of electrification, keeping both the health of the people andthe planetary boundaries in mind. Clean energy and particularly solar energy, if planned and deployed in a manner that is decentralized, need-based along with accounting for local capacities and conditions for sustenance - can become a ‘silver bullet’ in catalyzing healthcare access to under-resourced settings. Given low-resource settings and last mile healthcare requirements this article only takes into consideration off-grid solar systems, which could be one of the primary ways for health centers to become resilient and contribute to climate mitigation, irrespective of prevailing grid and on-grid conditions.</p><p>With multiple similar programs for solar powering public health facilities over the past decade there are learnings that emerge from across the globe. One of the key learnings is the need for a system thinking lens while deploying decentralized solar for health programs that sustain from a long-term perspective. Systems thinking is an approach that enables one to consider the health system as a whole, while designing demand driven solar powering programs for driving access to healthcare goals. This can be done by breaking down all aspects of solar powering and ensuring that within each aspect, the need is well-understood, the key stakeholders and their priorities are considered and capacities and relationships are accounted for. Moreover, systems are put in place for customization, expansion, and maintenance over time. The suggestions and examples provided below prioritize healthcare needs while driving enabling conditions for design and sustenance of solar for meeting current and future healthcare challenges. While healthcare systems require multiple levels of both curative and preventative healthcare, the consideration","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"7 ","pages":"Article 100052"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Technical, financial, and emissions analyses of solar water heating systems for supplying sustainable energy for hotels in Ghana","authors":"Flavio Odoi-Yorke ,&nbsp;Romain Akpahou ,&nbsp;Richard Opoku ,&nbsp;Lena D. Mensah","doi":"10.1016/j.solcom.2023.100051","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100051","url":null,"abstract":"<div><p>Ghana has the potential to deploy solar energy technologies, with its solar irradiation varying between 4 and 6.5 kWh/m²/day. However, the country's dependence on fossil fuels for generating electricity and heat remains prevalent. This study aims to assess the technical and financial feasibility of installing solar water heating (SWH) systems in hotels within Ghana. RETScreen software is used to conduct the technical, financial, and emission analyses of the SWH system for five cities in Ghana, including Accra, Cape Coast, Kumasi, Tamale, and Wa. The findings show that SWH systems are feasible for Ghanaian hotels, with solar fractions ranging from 61.2% in Kumasi to 78.5% in Wa. Also, installing the SWH system yields a positive net present value for all the cities. The implication is that installing SWH systems in hotels operating in Ghana is financially viable and attractive for investment. In addition, payback periods infer that the SWH systems can generate a return on investment in a reasonable time frame, especially considering the equity payback period. Furthermore, about 58.7 tonnes of carbon dioxide (CO₂) emissions could be avoided annually by installing the SWH system in the selected cities. This study's findings suggest that hotels can achieve long-term financial savings on electricity costs by utilising solar energy to heat water. This, in turn, reduces their reliance on fossil fuel consumption while actively pursuing their sustainability objectives. The study findings are crucial in assisting hotel owners in making informed decisions on SWH systems.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"7 ","pages":"Article 100051"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel GMPP estimation technique for series parallel connected partially shaded PV array","authors":"Shashank Kumar ,&nbsp;Sisir Kumar Nayak ,&nbsp;Himanshu Sekhar Sahu","doi":"10.1016/j.solcom.2023.100049","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100049","url":null,"abstract":"<div><p>This paper presents a novel generalized model of the PV array, its circuit equation and an algorithm for its global maximum power point (GMPP) estimation in partial shading condition (PSC). A set theory based approach is proposed to develop equations in terms of voltage and current of strings and array of the generalized model of series parallel PV configuration under partial shading condition. Further, a mathematical expression for the iteration voltage is derived based on a generally observed property of local maximum power point (LMPP). The proposed GMPP estimation algorithm converges fast by simultaneous elimination of non-potential sections and subsections of the power-voltage curve of an array. Robustness of the proposed method for GMPP estimation is tested by considering 2000 no. of random shading patterns generated by MATLAB for two different PV array. Comparisons with the other existing methods in terms of accuracy and computational time of the GMPP estimation show the competitiveness of the proposed method. Experimental validation of the proposed method is carried out in the laboratory. The simulation and experimental results show that the proposed method for the GMPP estimation of a PV array under PSC is better and will be helpful for PV professionals.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"7 ","pages":"Article 100049"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of solar radiation measurement sensor with added value to promote wide-area solar power prediction technology","authors":"Chikako Dozono,&nbsp;Haru Fujishima,&nbsp;Hana Hebishima,&nbsp;Shin-ichi Inage","doi":"10.1016/j.solcom.2023.100054","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100054","url":null,"abstract":"<div><p>In this study, we investigated a scenario where the prediction technology for the total output of distributed photovoltaic power generation over a wide area could be more efficiently disseminated by sharing the costs with society, rather than burdening only specific companies with the costs. To achieve this goal, we not only focused on measuring the amount of solar radiation but also incorporated additional parameters into the solar radiation sensor, which is essential for improving the accuracy of the prediction technology. The fundamental configuration of the developed sensor consists of an organic thin film solar cell (OPV), and the output is utilized to transmit the output data externally. Utilizing the surplus power from the OPV, we examined and produced three types of sensors: 1) a sensor with a CO₂ measurement function, 2) a sensor with a mist spray function, and 3) a sensor with a photography function using a drive recorder. As a result, all sensors met the predetermined functions and target specifications.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"7 ","pages":"Article 100054"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advancements in technology, markets, finance, and policy: A roadmap to achieve global net-zero goal","authors":"D. Yogi Goswami","doi":"10.1016/j.solcom.2023.100047","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100047","url":null,"abstract":"","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"6 ","pages":"Article 100047"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50188091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainability assessments in solar energy projects: Results of case studies","authors":"Daniel Garraín,&nbsp;Yolanda Lechón","doi":"10.1016/j.solcom.2023.100039","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100039","url":null,"abstract":"<div><p>Renewable energy and energy efficiency terms are the focus of policymakers to achieve a sustainable energy policy. The concept of sustainability has become a key element in the development of renewable technologies, so both quantitative and qualitative assessments are essential to consider the environmental and socioeconomic impacts. This study presents the results of applying different methodologies to assess the sustainability of the development of solar energy technologies, where the importance of this type of analysis is highlighted to support decision-makers.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"6 ","pages":"Article 100039"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50188088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Techno-economic analysis of waste-to-energy with solar hybrid: A case study from Kumasi, Ghana","authors":"Kwame Asante ,&nbsp;Samuel Gyamfi ,&nbsp;Mark Amo-Boateng","doi":"10.1016/j.solcom.2023.100041","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100041","url":null,"abstract":"<div><p>The rapid growth in global energy demand in recent years has made global leaders think more about sustainability in the energy sector. Waste-to-energy (WTE) and solar energy are emerging areas in the energy sustainability discourse since terrestrial sustainability is of great concern. The study uses economic indices to evaluate the feasibility of WTE and solar plants at Oti landfill in Kumasi, Ghana, with the core objective of sustainable waste management through electricity production. Three scenarios were considered, (i) waste-to-energy plant alone, (ii) solar PV plant alone and (iii) combination of (i) and (ii) – hybrid. The Oti landfill receives a total volume of 891,000 tons per year of solid waste, which can be used to generate 379 GWh of electricity per year and has the potential to generate 85 GWh of electricity per year from solar with the assumption that one-half of the land surface area used waste to electricity and the other one-half is used for solar PV electricity. The study shows that all three scenarios are worth investing in, but the best investment option is the solar PV plant alone with NPV of mGHs 324.79, DPP of 4 years, IRR of 44% and DPI of 2.7. The WTE alone had NPV, IRR, DPI and DPP of mGHs 1122.11, 16%, 0.47 and 15.2 years, respectively. The WTE and solar PV composite had NPV of mGHs1445.9, IRR of 17%, DPI of 2.02 and the project initial cost recovery of 14.2 years.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"6 ","pages":"Article 100041"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50188090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Creating a solar roadmap for the Republic of Togo","authors":"Todine Salifou ,&nbsp;Amy Nabiliou ,&nbsp;Mataani F. Alloula ,&nbsp;Juzer Vasi ,&nbsp;Philippe Malbranche ,&nbsp;Heinz Ossenbrink ,&nbsp;Pierre Verlinden ,&nbsp;Stefan Nowak ,&nbsp;Sarah Kurtz ,&nbsp;Lawrence L. Kazmerski","doi":"10.1016/j.solcom.2023.100043","DOIUrl":"https://doi.org/10.1016/j.solcom.2023.100043","url":null,"abstract":"<div><p>This paper describes the processes and initial results for developing a Solar Roadmap for the Republic of Togo, West Africa. The activity followed the IEA/ISA procedure described in the “Solar Energy, Mapping the Road Ahead” document. The roadmap development committee included members from Togo, Europe, Asia, and the United States. The activity was initiated in 2020. The Togo Solar Roadmap development was divided into four Phases: Planning and preparation; Visioning; Roadmap Development; and Roadmap implementation and revision. The first 3 phases have been completed and are reported in this paper. The primary focus of the roadmap is on solar electricity and photovoltaics.</p></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"6 ","pages":"Article 100043"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50188092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}