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A Detailed Optimisation of Solar Photovoltaic/Thermal Systems and its Application.
摘要： There have been various studies and experimental results analysing the operational behaviour of PVT, most of which has been done at steady state or quasi-state. Variable factors can be controlled to optimise the PVT output such as mass flow rate, irradiation falling on the PVT through tracking or incidence angles in a day and fixed factors that depend on the design of the chosen PVT system as well as location parameters such as ambient temperature, wind speed, Transport Fluid used, Difference in Structure, Packing Density, Nominal operating temperature, stagnation temperatures, Fill Factor, Thickness of each layer, Location and Latitude and Heat removal factor (harp or serpentine design). The aim of this research is to validate and predict the dynamic behaviour of PVT systems while accurately describing the factor responsible for the loss of efficiency at any point in time under various weather constraints. A commercial system was considered (Solar Angel PVT system) here and is simulated for an entire year. The system was modelled in MATLAB and solved in implicit RK-4 method. The research question finds out to establish the basis for a standard testing protocol for assessing PV-T performance throughout various differences. It also analyses the long-term dynamic performance of PV/T technology by providing evidential data analysis (solar irradiance, heat and electricity, ambient temperature, operational temperatures, flow rates and thermal storage capacity) while completing an assessment of PVT behaviour with respect to an equivalent PV under different weather conditions. The flow rates, heat removal factor and the location affect the thermal behaviour of the PV/T to a greater extent than nominal temperatures and stagnation temperatures.
关键词： Electric and Thermal Energy,Solar Photovoltaic thermal systems,Optimising,Solar Energy,Dynamic Modelling,Optimal operation of PVT,PVT systems with storage
更新于2025-09-12 10:27:22
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Control Strategy of Intergrated Photovoltaic-UPQC System for DC-Bus Voltage Stability and Voltage Sags Compensation
摘要： Power quality problem, because of its various forms and occurrence frequency, has become one of the most critical challenges confronted by a power system. Meanwhile, the development of renewable energy has led to more demands for an integrated system that combines both merits of sustainable energy generation and power quality improvement. In this context, this paper discusses an integrated photovoltaic-uni?ed power quality conditioner (PV-UPQC) and its control strategy. The system is composed of a series compensator, shunt compensator, dc-bus, and photovoltaic array, which conducts an integration of photovoltaic generation and power quality mitigation. The fuzzy adaptive PI controller and the improved Maximum Power Point Tracking (MPPT) technique are proposed to enhance the stability of dc-bus voltage, which is aimed at the power balance and steady operation of the whole system. Additionally, the coordinate control strategy is studied in order to ensure the normal operation and compensation performance of the system under severe voltage sag condition. In comparison to the existing PV-UPQC system, the proposed control method could improve the performance of dc-bus stability and the compensation ability. The dynamic behavior of the integrated system were veri?ed by simulation in MATLAB and PLECS. Selected results are reported to show that the dc-bus voltage was stable and increased under severe situations, which validates the effectiveness of the proposed integrated PV-UPQC system and its control strategy.
关键词： voltage sag,coordination control,power quality,fuzzy adaptive control,solar photovoltaic,uni?ed power quality conditioner
更新于2025-09-12 10:27:22
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Analysis of Field Degradation Rates Observed in All-India Survey of Photovoltaic Module Reliability 2018
摘要： The analysis of performance degradation in photovoltaic (PV) modules with c-Si technologies as observed in the All-India Survey of PV Module Reliability 2018 is presented in this article. The degradation rates are correlated with the module age, system size, mounting configuration, and climate of deployment. Key failure modes responsible for the higher degradation rates seen in certain sites are identified using visual, infrared, and electroluminescence imaging. Potential-induced degradation is found to be the key mechanism responsible for higher degradation rates seen in Young sites. Also, deployment in hot climates and rooftops is seen to accelerate degradation. Multipoint analysis of degradation rates is presented at sites inspected in prior All-India Surveys.
关键词： potential-induced degradation (PID),All-India Survey,solar photovoltaic (PV),light-induced degradation (LID),field survey,silicon,reliability,degradation
更新于2025-09-12 10:27:22
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Solar Photovoltaic Distributed Generation in Brazil: The Case of Resolution 482/2012
摘要： The current electric generation in Brazil to meet its demand is based on centralized electricity generation, however, a new decentralized model is emerging in light of the recent advance of distributed generation (DG), among them, solar photovoltaic DG. The objective of this article is to present an analysis of the evolution of solar photovoltaic DG in Brazil, after the Normative Resolution (NR) No. 482/2012 of the National Electric Energy Agency (Agência Nacional de Energia Elétrica - ANEEL). The methodology used was based on an exploratory, descriptive and bibliographic study that supported an information analysis on the growth and prospects of solar photovoltaic DG market in Brazil. Hypotheses that current national regulations need improvements, and there is a great potential for expansion to solar photovoltaic DG have been taken as a starting point. Analyzes of the Brazilian socioeconomic context and the impacts after the NR No.482/2012 on the development of a national market for photovoltaic DG in recent years were carried out. ANEEL regulations have been periodically revised and updated in an attempt to induce a growth of solar photovoltaic market in Brazil. The results indicate a growth of solar photovoltaic DG in the country since 2012, with a significant increase in 2015. In conclusion, despite the growing evolution of solar photovoltaic DG in Brazil, there is a need for further regulatory improvements to boost this market. In addition, this article proposes that existing regulations could be improved in order to: a) reduce or exempt taxes on equipment of solar photovoltaic DG, as well as provide government incentives; (b) enable consumers to enjoy greater benefits by allowing the surplus energy to be sold to the distributor or the free market; c) exempt taxes for non-profit institutions, and d) include in housing programs and projects, the requirement of energy efficiency and solar photovoltaic DG.
关键词： Distributed Generation,Normative Resolution ANEEL 482/2012,Brazil,Solar Photovoltaic,Regulation
更新于2025-09-12 10:27:22
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Economic decision-making tool for distributed solar photovoltaic panels and storage: The case of Chile
摘要： The benefits of distributed solar photovoltaic (PV) panels and storage have been widely reported in the literature. However, the economic impact on the electricity bill due to its implementation is generally unknown by the distribution customers. In this work, we develop an economic decision-making tool for the case of Chile. This tool is based on an easy-to-implement algorithm, which computes the number of solar PV panels and batteries that maximize the economic return in a given time horizon subject to several technical constraints. To illustrative the usefulness of our tool, a personal computer implementation and a numerical example are considered. The obtained results compute the economic benefit in net present value of the best alternative solar PV panels and batteries in an execution time less than 30 seconds.
关键词： Distributed solar photovoltaic panels and storage,Economic analysis,Economic decision-making tool
更新于2025-09-12 10:27:22
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Performance of a Hybrid Solar Photovoltaic - Air Source Heat Pump System with Energy Storage
摘要： The paper introduced a smart renewable energy based microgrid system which is composed of three subsystems: solar photovoltaic subsystem, air source heat pump subsystem and energy storage subsystem. This microgrid system was applied to the demonstration project located in Xining City, Qinghai Province, China. The energy performance of the smart renewable energy based microgrid system was evaluated and compared with that of traditional energy supply system which totally depends on the electricity grid and natural gas. The comparison study demonstrates that the proposed hybrid energy supply system is superior to traditional system, significantly decreasing additional energy consumption for buildings and reducing pollutant emissions.
关键词： Energy storage,Heat pump,Solar photovoltaic,Smart microgrid,Renewable energy
更新于2025-09-12 10:27:22
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Energy storage and management system design optimization for a photovoltaic integrated low-energy building
摘要： This study aims to analyze and optimize the photovoltaic-battery energy storage (PV-BES) system installed in a low-energy building in China. A novel energy management strategy considering the battery cycling aging, grid relief and local time-of-use pricing is proposed based on TRNSYS. Both single-criterion and multi-criterion optimizations are conducted by comprehensively considering technical, economic and environmental performances of the system based on decision-making strategies including the weighted sum and minimum distance to the utopia point methods. The single-criterion optimizations achieve superior performances in the energy supply, battery storage, utility grid and whole system aspect respectively over the existing scenario of the target building. The multi-criterion optimization considering all performance indicators shows that the PV self-consumption and PV efficiency can be increased by 15.0% and 48.6% while the standard deviation of net grid power, battery cycling aging and CO2 emission can be reduced by 3.4%, 78.5% and 34.7% respectively. The significance and impact of design parameters are further quantified by both local and global sensitivity analyses. This study can provide references for the optimum energy management of PV-BES systems in low-energy buildings and guide the renewable energy and energy storage system design to achieve higher penetration of renewable applications into urban areas.
关键词： Battery energy storage,Energy management,Optimization,Solar photovoltaic,Sensitivity analysis
更新于2025-09-12 10:27:22
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Evaluation of the Success of a Small-Scale Photovoltaic Energy System
摘要： Solar photovoltaic energy generation is growing in Brazil and in the world. Considered a new investment alternative, many investors lack knowledge and difficulty in evaluating the success it will have with photovoltaic systems. This study aims to evaluate the percentage of investor success in a small scale photovoltaic power generation project in Brazil. A measurement modeling was developed through the methodology MCDM (AHP) and Key Performance Indicators (KPI). The case study was in a system of a supermarket of the state of Rio Grande do Sul, of 75kW of installed power. For the analysis of the importance of KPIs, 29 photovoltaic entrepreneurs in Brazil participated in the research. Analysis of the importance levels of the 33 KPI by the investor and the experts resulted in a 73.25% success rate of the project, classifying it as "Potential Success." Systematic analysis of a high initial capital investment is important in assisting the investor in decision making. The 33 KPI is relevant to an assessment of investor success.
关键词： Performance Measurement,Multicriteria Decision,Solar Photovoltaic Energy
更新于2025-09-12 10:27:22
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Drivers and Anticipated Outcomes of Solar Photovoltaic Projects –The Construction Practitioners’ Perspectives
摘要： Despite Australia receives high levels of solar radiation annually, contributions to energy production from solar sources are significantly low across the country. Whist there is no lack of studies reviewing the initiatives of solar photovoltaic (PV) projects in Australia; few have been conducted in an approach that target construction industry’s view and their professionals’ perspectives on the solar PV projects. With the growing consensus that climate change is a threat facing today’s society, this study aims to identify the relevant drivers and outcomes of solar PV projects for today’s construction industry professionals and subsequently prioritise these phenomenon in terms of their importance and anticipation. Therefore, this study approached construction industry professionals to solicit their views regarding drivers and outcomes of solar PV implementation through an online questionnaire survey. The data received from the survey was subsequently analysed through an entropy ranking approach, facilitating prioritisation and ranking of both the drivers and outcomes. The findings reveal that construction professionals prioritise lowering the cost of solar PV technology as the most effective driver to result in their increased PV uptake, and resultantly anticipate greater solar PV efficiency and energy storage as the most important outcome. The findings of this study are insightful as they deconstruct barriers that may prevent construction professionals from implementing solar PV projects. Future study in this field is suggested to focus on ways in which lowered costs of solar PV technology can be achieved and technology efficiency levels increased.
关键词： construction industry,solar photovoltaic projects,entropy ranking,outcomes,drivers
更新于2025-09-12 10:27:22
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Economic and performance evaluation of grid-connected residential solar photovoltaic systems in Northwest China
摘要： The purpose of the study is to assess and compare the economy and performance of a hypothetical 5 kWp grid-connected residential solar photovoltaic (PV) system with and without batteries in Northwest China. The performance and economic analysis of the grid-connected residential PV system in five locations (Xi’an, Lanzhou, Xining, Yinchuan, and Urumqi) of different Northwest China has been performed through System Advisor Model (SAM) software developed by National Renewable Energy Laboratory (NREL) using the typical meteorological year (TMY) data of EnergyPlus weather database. The results indicate that the feasible system comprises 16 Shanghai JA Solar Technology JAM6-72-275 mono-crystalline modules rated at 275Wp, two GCI-3K-2G-H inverters rated at 2,990 W, and without flooded lead acid battery storage. The grid-connected PV systems are economically viable in the five locations, whereas the grid-connect PV/battery systems are not viable under the existing assumptions. The loan term has the greatest impact on the real LCOE and NPV compared to the considered sensitivity variables when the range of variation is within ±20%.
关键词： levelized cost of electricity,grid-connected residential solar photovoltaic system,economic,Performance,net present value
更新于2025-09-12 10:27:22