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Evaluation of the photovoltaic potential in built environment using spatial data captured by unmanned aerial vehicles
摘要： In this paper, a spatial photovoltaic (PV) potential evaluation method based on the combination of aerial photogrammetry and Geographic Information System (GIS) is proposed for PV potential evaluation of built environment (BE). The method can be applied to PV potential evaluation of not only building roofs, but also built environments such as carpark. The point cloud model of the studied field is established by processing images captured by unmanned aerial vehicles (UAV), which are then imported into GIS to estimate the available area for PV installation based on sunlight analysis after offsetting the identified borders of the urban and ecological infrastructures. The PV potential is determined based on the installation configurations of PV modules. With the help of the PVSYST software simulation, the proposed method in this paper is used to evaluate the PV potential of a carpark and a rooftop of a building in Singapore.
关键词： geographic information system,low‐altitude aerial photography,photovoltaic potential evaluation,photogrammetry,built environment
更新于2025-09-11 14:15:04
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Factors Influencing Social Perception of Residential Solar Photovoltaic Systems in Saudi Arabia
摘要： Saudi Arabia has taken major steps to shift from an oil-centered to more environmentally-focused economy. One approach made recently is to enable households to possess and generate electricity by using small-scale residential solar photovoltaic systems (RSPSs). However, the number of applications to install this technology in residences is signi?cantly low. Social acceptance of solar energy is essential for a successful energy transition. Hence, the present study aims to examine factors that may potentially motivate or impede individuals from purchasing RSPSs based on the di?usion of innovations theory. A cross-sectional, web-based survey is conducted including 1498 participants from the ?ve main regions of Saudi Arabia. Results revealed a good cognition level in relation to solar energy, where the majority (64–83%) of respondents are aware of the bene?ts. An overwhelming proportion of the respondents (97%) associate RSPSs with a signi?cantly positive image, with no signi?cant variation in the acceptance or rejection rates among the ?ve areas covered by the survey (p = 0.1). The results also show high statistical signi?cance for the di?erences between RSPS acceptors and rejecters in all innovation attributes (p < 0.001). However, the perception of relative advantage has a higher correlation with acceptance RSPSs. These perceived advantages were of rather long-term non?nancial bene?ts, such as environmental protection against global warming and provision of unlimited power, rather than the revenue related to direct costs bene?ts. The study also revealed that the installation cost was the most signi?cant barrier to adopting the RSPS, which can be a focus for RSPS dissemination policies.
关键词： public acceptance,residential solar photovoltaic systems,innovation discussion,social perception
更新于2025-09-11 14:15:04
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MEH-PPV/Carbon Nanopearls Nanocomposites for Enhanced Organic Solar Cells Efficiencies
摘要： An organic nanocomposites, based on a conjugated polymer (MEH-PPV) as electron donor material and carbon nanopearls (CNPs) as electron acceptor material, have been elaborated and optoelectronically studied. The effect of CNPs concentration on the electric and photoelectric properties in these blends has been investigated. Dielectric measurements demonstrate that the blend conductivity displays a dramatic increase, reaching 0.6 S/m for a CNPs concentration about 1 wt.%. The elaborated organic nanocomposites were used as photoactive materials in organic solar cells.
关键词： organic nanocomposites,conjugated polymer,carbon nanopearls,photovoltaic response,organic solar cells,electric properties
更新于2025-09-11 14:15:04
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Assessment of 50?kWp rooftop solar photovoltaic plant at The ICFAI University, Jaipur: A case study
摘要： Currently, India is espousing nonconventional energy sources at an express rate owing to concerns about climate change, emission of harmful greenhouse gases (GHG), and exhausting conventional energy sources. The solar photovoltaic (SPV) plants are, hence, expected to play a noteworthy role to meet energy security and sustainability goals. Contemporary studies reveal substantial ecological concerns associated with installing the ground mounted SPV plants in urban locations. Further observations depict that aforementioned plants need additional land, transmission, and distribution infrastructures. Consequently, rooftop SPV plants are the best solution to produce energy in urban locations, owing to the availability of a large number of empty rooftop spaces with least capacity expenditure. The present article discusses the techno-economic and ecological aspects of a 50 kWp rooftop SPV plant installed at ICFAI University, Jaipur. The plant has produced around 64.149 MWh in the year 2017. The technical assessment focuses on the effects of the meteorological parameters upon energy generation factors. The annual average final yield, reference yield, capacity utilization factor, and performance ratio found to be 106.9 kWh/kWp/month, 149.7 kWh/kWp/month, 14.64 and 70%, respectively. The economic parameters like net present value, internal rate of return, profitability index, and payback period are computed with 0–50% subsidy rates, which supports the financial viability of the plant. The plant contributed significantly to reducing GHG emissions by mitigating 102 t CO2, 128 kg SO2, 268 kg NOx, and 7,033 kg ash in the year 2017 as evident from the ecological investigation.
关键词： rooftop solar photovoltaic plant,GHG emissions,meteorological parameters,pay back period,capacity utilization factor,performance ratio
更新于2025-09-11 14:15:04
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Design scheme for fast charging station for electric vehicles with distributed photovoltaic power generation
摘要： The demand for fast charging is increasing owing to the rapid expansion of the market for electric vehicles. In addition, the power generation technology for distributed photovoltaic has matured. This paper presents a design scheme for a fast charging station for electric vehicles equipped with distributed photovoltaic power generation system taking the area with certain conditions in Beijing as an example construction site. The technical indexes and equipment lectotype covering the general framework and subsystems of the charging station are determined by analyzing the charging service demand of fast charging stations. In this study, the layout of the station is developed and the operation benefits of the station is analyzed. The design scheme realizes the design objective of “rationalization, modularization and intelligentization” of the fast charging station and can be used as reference for the construction of a fast charging network in urban area.
关键词： Design scheme,Electric vehicle,Charging demand,Distributed photovoltaic,Fast charging station
更新于2025-09-11 14:15:04
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Improving Performance of a Photovoltaic Panel by Pin Fins: A Theoretical Analysis
摘要： As efficiency of PV modules decreases with temperature rise, cooling methods can increase the power output and efficiency. One of the strategies for this purpose is passive cooling by implementing fins to the backside of a module. In the present study, annual energy output of a 50 W panel is analytically calculated in two unfinned and pin-finned cases based on hourly meteorological data for Shiraz, Iran. The results show that with the installation of 2-cm, 4-cm and 6-cm aluminum pin fins with finned-to-total-backside-area ratios of 0.17, 0.27 and 0.55, the power output increases by 1.24–4.16%, compared to the unfinned case. This increase is equivalent to 1.04–3.50 kWh more electrical energy production during a year.
关键词： Fin,Photovoltaic panels,Passive cooling,Solar energy
更新于2025-09-11 14:15:04
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Effects of different greenhouse coverings on energy parameters of a photovoltaic–thermal solar system
摘要： The present study analyzed the power and heat supply of a small-scale greenhouse by a photovoltaic–thermal (PV/T) system while using three greenhouse coverings (glass, plastic and polycarbonate) and four water mass flow rates (0.016, 0.025, 0.033 kg/s and no-flow), with or without a solar tracker. The electrical efficiency results for PV (without mass flow) and PV/T (0.016, 0.025 and 0.033 kg/s) states indicated that the application of the PV/T system enhanced electrical efficiency by 21.5, 28.4 and 36.84% for the glass glazing, by 15.28, 25 and 34.79% for the plastic covering, and by 19.82, 26.67 and 40.25% for the polycarbonate covering, compared to the PV state. The highest overall efficiency was at 0.033 kg/s with 59.9% (glass), 54.56% (plastic) and 47.58% (polycarbonate), and the lowest overall efficiency was at 0.016 kg/s with 41.75% (glass), 32.94% (plastic) and 31.22% (polycarbonate). In general, due to the electrical and thermal energy requirements of greenhouses, it can be said that, in addition to producing electricity by PV/T systems, their significant thermal energy production compared to PV panels can also promote the use of such systems in the future.
关键词： Photovoltaic/thermal,Different greenhouse coverings,Electrical efficiency,Thermal efficiency
更新于2025-09-11 14:15:04
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Porous SiC-mullite ceramics with high flexural strength and gas permeability prepared from photovoltaic silicon waste
摘要： In this paper, porous SiC-mullite ceramics (PSMCs) with high ?exural strength and gas permeability were prepared with various mass fractions of MoO3 and Al2O3. Higher performance was achieved at low sintering temperatures and the problem of large amounts of cristobalite phase in the PSMCs was solved. The results show that 4 wt% MoO3 is optimal for the growth of mullite rods at a sintering temperature of 850 °C. Porosity was e?ectively controlled by the formation of interlocking structure and mechanical strength was not obviously a?ected. Therefore, the optimal content of Al2O3 was 25 wt% in samples prepared at 850–1200 °C, as the ?exural strength was generally higher than that in samples with other Al2O3 contents. The highest ?exural strength of 66.02 MPa was achieved at an open porosity of 45.4%, gas permeability of 2.32 × 10?13 m2, and permeance of 4.62 × 10?5 mol m?2 s?1 Pa?1 in samples sintered at 1000 °C. This work is of signi?cance for the industrial preparation of PSMCs from photovoltaic silicon waste.
关键词： MoO3,Photovoltaic solid waste,Porous SiC ceramic,Mullite
更新于2025-09-11 14:15:04
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Life cycle analysis of a building integrated photovoltaic system operating in Bogotá, Colombia
摘要： In this study, the environmental behavior was characterized for a 840 Wp building-integrated photovoltaic (BIPV) system installed in the Department of Physics of the Faculty of Sciences at the National University of Colombia, Bogota campus. The methodology focused on the application of the international technical standards for Life Cycle Analysis (LCA) from cradle to grave based on the NTC ISO 14040 and NTC ISO 1404 standards, which regulate the methodological procedure. This article is based on comparing the potential of environmental impacts of five power generation scenarios, taking as reference the installation of the photovoltaic system (PV) at the University. During the analysis it was possible to determine that energy generation with coal has a greatest environmental impact compared with photovoltaics: 84% and 6% respectively. This represents 1138.8 gCO2eq/kWh for coal, compared to 35 gCO2eq/kWh for the PV system.
关键词： Solar energy,Solar cells,Greenhouse emissions,Photovoltaic systems,Life cycle analysis
更新于2025-09-11 14:15:04
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Reply to comment on “Important notes on parameter estimation of solar photovoltaic cell”, by Gnetchejo et al. [Energy Conversion and Management, https://doi.org/10.1016/j.enconman.2019.111870.]
摘要： This study aims to provide a response on the comment done by Dalia et al. on the paper “Important notes on parameter estimation of solar photovoltaic cell”, proposed by Gnetchejo et al. [1] where we have reported the inaccuracy occurred in PV parameter estimation.
关键词： Accuracy,General Algebraic Modeling System,Photovoltaic parameters
更新于2025-09-11 14:15:04