Solar Compass最新文献

{"title":"Resistivity of crystalline silicon photovoltaic cell to the electromagnetic field effects","authors":"Adama Ouedraogo ,&nbsp;Rodrigue Noaga Sawadogo ,&nbsp;Boureima Dianda ,&nbsp;Mahamadi Savadogo ,&nbsp;Boubacar Soro ,&nbsp;Thierry Sikoudouin Maurice Ky ,&nbsp;Dieudonné Joseph Bathiebo ,&nbsp;Sié Kam","doi":"10.1016/j.solcom.2025.100122","DOIUrl":"10.1016/j.solcom.2025.100122","url":null,"abstract":"<div><div>This present paper studies a crystalline silicon PV cell’s resistance to electromagnetic field (EMF) effects. This study identifies an optimal doping range for silicon PV cells, enhancing their resistance to EMF damage. After solving key equations, we analyzed the cell’s electrical parameters and energy processes. The current slightly drops as the dopant level (<span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>B</mi></mrow></msub></math></span>) increases from <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>14</mn></mrow></msup><mspace></mspace><msup><mrow><mi>cm</mi></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span> to <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>17</mn></mrow></msup><mspace></mspace><msup><mrow><mi>cm</mi></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span>. Meanwhile, the voltage rises sharply. Beyond <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>17</mn></mrow></msup><mspace></mspace><msup><mrow><mi>cm</mi></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span>, the current plummets, while the voltage sees a slight increase. This behavior indicates the best EMF resistance occurs at <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>17</mn></mrow></msup><mspace></mspace><msup><mrow><mi>cm</mi></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span>, aligning with the peak electric power at this doping level. The thermalization mechanism is not affected by the EMF and doping rate. However, the analyses of the thermodynamic process behavior and fill factor on the one hand. Conversely, the absorption mechanism reveals peak resistance to the EMF at <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>17</mn></mrow></msup><mspace></mspace><msup><mrow><mi>cm</mi></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span>. Thus, doping with boron enhances the electromagnetic resistivity of crystalline silicon PV cells. This also improves control over Light-Induced Degradation (LID).</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100122"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068570","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":"Evolution of solar driven desiccant systems for energy-efficient air conditioning: A review","authors":"Juri Sonowal ,&nbsp;B. Kiran Naik ,&nbsp;DVN. Lakshmi ,&nbsp;P. Muthukumar ,&nbsp;R. Anandalakshmi","doi":"10.1016/j.solcom.2025.100115","DOIUrl":"10.1016/j.solcom.2025.100115","url":null,"abstract":"<div><div>Desiccant air conditioning systems promise to be a cost-effective, low-grade energy-driven, sustainable system demonstrating huge potential as an alternate method for indoor thermal comfort. The heat and mass transfer performance of a desiccant system depends on the thermo-physical properties of the desiccant materials and the efficiency of the dehumidifier and regenerator. The highest amount of energy consumption is during regeneration. This paper presents feedback on the experimental research on different desiccant systems and their integration with external systems as an energy-saving approach. The review focuses on state-of-the-art desiccant materials, solid and liquid desiccant systems, hybrid systems, and methods of solar-driven regeneration. The details of different dehumidifier/ regenerator components have been presented. Finally, a comprehensive summary has been provided for future research and developments. The review reveals that desiccant composites are economically more viable desiccant materials due to their flexibility to tailor the properties by basic methods. Novel hybridization methods have been proposed that would considerably reduce energy consumption as well as provide long-term stable dehumidification and regeneration performance. Major challenges lie in the practical verification of many of the proposed techniques.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100115"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683374","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":"Recent Advancements in CSP: Evaluating High-Temperature Heat Transfer Fluids, Corrosion Prevention, and Alloy Selection for Enhanced Energy Density","authors":"Mohd Naqueeb Shaad Jagirdar ,&nbsp;Satya Sekhar Bhogilla ,&nbsp;Ashmore Mawire ,&nbsp;Hakeem Niyas","doi":"10.1016/j.solcom.2025.100118","DOIUrl":"10.1016/j.solcom.2025.100118","url":null,"abstract":"<div><div>Remarkable progress has been made in harnessing solar energy for electricity generation through Concentrated Solar Power (CSP) plants, which now exceed 6 GW in global installed capacity. The utilization of high-temperature heat transfer fluids (HTFs) has significantly improved system efficiencies; for instance, nitrate-based molten salts commonly operate at 300–565 °C, while newer chloride and carbonate salts can reach 700-800 °C enabling advanced supercritical CO₂ cycles with potential thermal-to-electric efficiencies of up to 50%. However, salts often cost $0.2-2.5 per kg and require carefully selected corrosion-resistant alloys. Meanwhile, liquid metals such as lead-bismuth can handle temperatures above 800 °C, offering high volumetric energy densities (often &gt;20,000 MJ/m³) and strong heat-transfer properties. Yet, they demand rigorous corrosion mitigation and elevated capital expenditures. This paper provides an in-depth review of HTF selection, corrosion prevention strategies, material costs, and energy density aspects in CSP. It further examines the feasibility of liquid metals relative to molten salts, covering suitable alloy materials for storage. By highlighting practical performance data and cost considerations, this review offers key insights into advancements and challenges of CSP technology ultimately proposing pathways toward more efficient, high-temperature solar energy generation.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100118"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783904","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":"Laboratory investigation of freshwater production from a modified solar pond and comparison with a conventional solar pond","authors":"Mehdi Sedaghat,&nbsp;Farshad Farahbod","doi":"10.1016/j.solcom.2025.100120","DOIUrl":"10.1016/j.solcom.2025.100120","url":null,"abstract":"<div><div>Water scarcity, particularly in recent years, has led to numerous challenges for humans worldwide. Decreasing precipitation coupled with a growing global population has exacerbated this problem. This study compares and evaluates the performance of a modified and a conventional solar pond for desalination and freshwater production. The modified pond is equipped with coiled pipes at its base, through which titanium dioxide nanofluid circulates. Originally, the improved pond used metal oxide nanoparticles due to their high conductive heat transfer coefficient. The research reveals that the temperature of the top layer of brine is, on average, 29 % higher than the ambient temperature. Additionally, the temperature of the second surface layer of brine is, on average, 18 % higher than the first, while the third surface layer is 11 % higher than the second. Similarly, the fourth surface layer is approximately 10 % warmer than the third, and the bottom layer is about 5 % warmer than the fourth. The study indicates that the maximum evaporation rate occurred in July, reaching 5.6 L/m²/day for the conventional solar pond and 21.1 L/m²/day for the modified pond. Based on this study, the maximum exergy was observed at 2 PM, with values of 2.5 % and 9.7 % for the conventional and modified solar ponds, respectively. The study shows that the maximum ambient temperature at 2 PM on June 17th was 38.9 °C, while on December 17th, it was 16.1 °C. Furthermore, the minimum ambient temperature occurred at 7 AM, with values of 26.4 °C and 7.8 °C for June 17th and December 17th, respectively.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100120"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815786","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":"Urban heat island and pollutant correlations in Bangalore, India using geospatial techniques","authors":"Aneesh Mathew,&nbsp;K.S. Arunab","doi":"10.1016/j.solcom.2025.100108","DOIUrl":"10.1016/j.solcom.2025.100108","url":null,"abstract":"<div><div>The interaction between urban heat island (UHI) effects and urban air pollution significantly impacts urban ecology, climate dynamics, and inhabitants' well-being. This study examines into the correlation between UHI effects and various pollutants (CO, HCHO, aerosols, NO₂, O₃, and SO₂) across Bangalore from 2019 to 2022, exploring their spatial and thermal connections. The study utilized satellite remote sensing data from TROPOMI for air pollutants (CO, NO₂, HCHO, SO₂, O₃, and aerosols) and MODIS for land surface temperature (LST). Data were collected over a four-year period (2019–2022) to analyze spatial and temporal pollutant distributions and UHI effects in Bangalore and employed statistical methods, including Pearson correlation, independent <em>t</em>-tests, and ANOVA, to assess the relationships between UHI indicators and pollutant concentrations. A weighted Urban Pollution Island (UPI) index was developed using Fuzzy AHP, while thermal categorization was achieved through spatial analysis techniques. Research indicates significantly elevated pollution levels in urban areas compared to rural regions. The research demonstrates positive correlation between UHI indicators and CO, HCHO, aerosols, NO₂, and O₃ in urban-rural environments. A negative correlation is observed between the UHI indicator and SO₂ in these contexts, requiring a thorough investigation of the UHI-pollutant relationship. High-risk zones (HRZs) demonstrate significantly elevated yearly average concentrations of NO₂ (66.614%), aerosols (13.610%), HCHO (8.816%), and CO (2.028%) relative to low-risk zones (LRZs). Ozone levels are consistently similar between HRZs and LRZs. In contrast, LRZs demonstrate a greater yearly average concentration of SO₂ (7.562%) than HRZs. Furthermore, HRZs exhibit an elevated LST of 2.198 °C relative to LRZs. These results yield essential insights for urban planning and policy development, providing a thorough comprehension of UHI pollution dynamics. This research clarifies these dynamics, aiding informed decision-making to mitigate the effects of UHI and pollution in urban settings.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100108"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429753","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":"Nigeria’s renewable energy sector: analysis of the present and future prospects","authors":"UkoimaKelvin Nkalo","doi":"10.1016/j.solcom.2025.100123","DOIUrl":"10.1016/j.solcom.2025.100123","url":null,"abstract":"<div><div>This paper provides an analysis of Nigeria's renewable energy (RE) sector, examining the present state, challenges, and future prospects. The study focuses on various RE sources. These include solar, hydropower, wind, and biomass, and discusses their potential for environmentally sustainable development and energy access. Key findings reveal considerable potential for solar energy, with installed capacity of approximately 112 MW and substantial off-grid solutions improving energy access for rural communities. Hydropower still remains a major RE source, with total capacity of 2,100 MW installed and promising potential for small and mini-hydropower initiatives. Wind energy potential is concentrated in the northern regions, with several pilot projects initiated. Biomass energy, derived from agricultural waste, holds considerable potential for electricity generation and rural development. The discussion highlights the need for infrastructure development, financing mechanisms, policy support, and technological innovations to overcome challenges and fully realize the potential of RE in Nigeria. The paper concludes with recommendations for sustainable development practices, regulatory frameworks, and capacity-building initiatives to encourage the growth of the RE sector.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100123"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906113","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":"Smart glazing systems: An industrial outlook","authors":"Samantha Wijewardane ,&nbsp;Matthaios Santamouris","doi":"10.1016/j.solcom.2025.100114","DOIUrl":"10.1016/j.solcom.2025.100114","url":null,"abstract":"<div><div>Windows play a pivotal role in the building envelope, significantly influencing energy performance, aesthetic appeal, and overall occupant comfort. The design of a glazing system that optimally integrates all relevant factors poses considerable challenges. Smart glazing technologies, capable of dynamically adjusting their optical properties in response to varying outdoor conditions, have shown a promising potential to enhance energy efficiency without compromising the architectural integrity of structures. This paper provides a thorough review of commercially available smart window technologies, examining aspects such as their underlying technologies, manufacturing processes, marketing strategies, energy performance metrics, aesthetic qualities, and the barriers they face in capturing a larger market segment. The smart glazing systems considered include Electrochromic (EC), thermochromic (TC), thermotropic (TT), photochromic (PC), SPD (Suspended Particle Devices) Smart windows, PDLC (Polymer Dispersed Liquid Crystal) and PNLC (Polymer Network Liquid Crystals) smart windows. In the discussion section, we summarize the principal findings and explore strategic pathways to address the current challenges hindering broader adoption of these advanced glazing solutions.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100114"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683753","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 novel experimental approach to achieve optical properties of algae panels improving visual-thermal comfort in office buildings","authors":"Fatemeh Delkhosh ,&nbsp;Mohammadjavad Mahdavinejad ,&nbsp;Ali Goharian ,&nbsp;Christian Hepf ,&nbsp;Thomas Auer","doi":"10.1016/j.solcom.2025.100116","DOIUrl":"10.1016/j.solcom.2025.100116","url":null,"abstract":"<div><div>This research paper explores how microalgae photobioreactor panels (PBR) impact daylight performance and visual comfort in office buildings. It merges experimental testing and computational simulation to investigate the effects of spirulina platensis microalgae in PBR panels on daylight measurements and glare potential. Most building-related simulations do not utilize the actual radiance properties of microalgae. The novelty of this research lies in highlighting a specific framework to obtain the most accurate optical properties in simulation techniques, including specular transmittance, specular reflectance, diffuse transmittance, and diffuse reflectance. Additionally, it addresses simulation troubleshooting and the lack of information in previous research while simplifying changes in algae concentration. This approach aims to achieve a numerical ratio of the daily increase in microalgae concentration and the decrease in transmitted light, thereby addressing an important gap. A state-of-the-art approach is developed to create a comprehensive framework for transferring all optical properties from experimental data to simulation, maximizing the accuracy of results and the performance of spirulina microalgae. Using a ratio of 1:60 microalgae to water, 85 % of the space is glare-free throughout the year. After one day of growth, maintaining a constant microalgae-to-water density on the second day results in 95.5 % of the space being glare-free throughout the year. Both occupants on the second day of algae cultivation achieve visual comfort, characterized by imperceptible glare, consistently throughout the year. Considering that the density of the highest daylight efficiency was obtained on the first and second days of spirulina microalgae cultivation and the amount of glare was compatible with the occupant's eyes on the first day, so visual comfort can be provided to the residents without reducing the daylight efficiency. The study finds that PBR panels can effectively control glare, but their influence on daylight availability should be maximized.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100116"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799397","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 indoor convective and radiative heat transfer coefficient for a thermally activated building system in tropical climate conditions","authors":"T. Vivek,&nbsp;C. Rakesh,&nbsp;K. Balaji,&nbsp;Ananth Pai","doi":"10.1016/j.solcom.2025.100119","DOIUrl":"10.1016/j.solcom.2025.100119","url":null,"abstract":"<div><div>Thermally activated building systems (TABS) are one of the most commonly utilised structural cooling methods in construction industries. This method of structural cooling has pipes encapsulated in building surfaces. This investigation analyses the internal convective heat transfer coefficient (CHTC) and radiative heat transfer coefficient (RHTC) for TABS in tropical conditions. The overall heat transfer coefficient is experimentally evaluated with HFP01 heat flux sensors and wet bulb globe thermometers. Calculated and actual CHTC were compared with the interrelationship available in the referred literature and with the constant value recommended by the standard. The results from the measurements indicate that the average CHTC and RHTC are 2.66 W/m²K and 5.7 W/m²K, and it conforms with EN ISO 6946 standards for tropical climates. The CHTC was also quantified with many correlations developed in the scientific literature to determine the best model for the TABS environment. From statistical error analysis, it was determined that Khalifa and Marshall's model was suited with the most minor error of 3 % compared to the other models.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100119"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823592","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":"Suitability of natural composite desiccant assisted evaporative cooling for sustainable net zero energy green building","authors":"Harish Kumar U ,&nbsp;Lakshmi Kanthan Bharathi A ,&nbsp;Saravanan R ,&nbsp;Kalaiselvam S","doi":"10.1016/j.solcom.2025.100121","DOIUrl":"10.1016/j.solcom.2025.100121","url":null,"abstract":"<div><div>This paper investigates the adsorption capacity of the organic cow dung desiccant and its composites for application as a desiccant for desiccant dehumidification systems. The composite desiccants of cow dung with calcium chloride (CDC) and with silica gel (CDS) were prepared as a solution with Hydroxyethylcellulose and coated on a Wood Pulp Fiber Paper (WPFP) substrate and their adsorption ability was studied for different temperatures (25, 35 and 45 °C) and RH (75, 85 and 95 %). The desiccant bed of size 30 × 30 cm with desiccant CD, CDS, and CDC coated on the Wood Pulp fiber paper was prepared and subjected to dehumidification and regeneration. The dehumidification capacity (DC) and dehumidification coefficient of performance (DCOP) of the CD, CDC, and CDS composite desiccant beds were analyzed. The composite CDC performed better than others with a moisture uptake capacity of 0.643 g/g by reaching saturation in 80 min. CD, CDC, and CDS desiccants show faster regeneration within 30 min at the regeneration temperature of 80 °C. The CDC-coated Wood Pulp Fiber Paper performed better and the DCOP was maximum with a value of 2.52 at 50 °C regeneration temperature considering 50, 60, 70, and 80 °C.</div></div>","PeriodicalId":101173,"journal":{"name":"Solar Compass","volume":"14 ","pages":"Article 100121"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143911786","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}