- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Temperature uniformity enhancement of densely packed high concentrator photovoltaic module using four quadrants microchannel heat sink
摘要： The dense solar radiation received by a high concentration photovoltaic module (HCPVM) causes a high cell temperature. In this module, multiple solar cells were electrically connected in both series and parallel. The higher temperature of the solar cell in the series string limits the generated power for the whole string. Therefore, it is crucial to employ a uniform cooling mechanism for higher electrical performance along with a longer lifespan. The uniform cooling is required to attain safe operating temperature and prevent the hot spot formation. Hence, in the current work, a four-compartment microchannel heat sink is proposed for the thermal management of HCPVM under high solar concentration of 1000 suns (1 sun = 1000 W/m2). A three-dimensional (3D) conjugate heat transfer model with exergy analysis is developed and validated. This model was used to investigate the effect of inlet and outlet orientation of four quadrants microchannel heat sink as a cooling method for HCPVM. Eight different orientations of parallel-flow and counter-flow conditions were investigated and compared in terms of temperature non-uniformity, module power, and exergy performance. The results showed that the inlet and outlet orientation was a key role affecting the module temperature non-uniformity. For the counter-flow operated heat sinks, the HCPVM can be operated under a temperature non-uniformity of 3.1 °C at total inlet module mass flowrate of 350 g/min and solar concentration ratio of 1000 suns. In addition, the attained HCPVM electrical, thermal, and overall exergy efficiency were 37.2%, 8.2%, and 45.4% respectively at the same conditions.
关键词： Densely packed module,Solar concentration ratio,Exergy analysis,Microchannel heat sink,Uniform cooling
更新于2025-09-23 15:21:01
-
Multi Input Converter for Reliable and Efficient Harvesting of Solar Energy
摘要： In this paper, a Multi-input converter (MIC) based module level approach for harvesting maximum power in a photovoltaic (PV) system during partial shading is proposed. The MIC topology has a dedicated switch in series with each module to operate it at its maximum power point (MPP). Each module is independent of the other and achieves their respective MPP’s under respective operating conditions. The MIC topology can also withstand open circuit and module mismatch conditions. The proposed system offers simplicity in design, flexibility in control and reliability in operation with low component count (number of switches and passive elements) consequently reduces the size, cost, and complexity of the system. The complete system is comprehensively analyzed for a standalone system under randomly selected conditions and is validated both by simulation studies in MATLAB environment and exhaustive experimental studies on a laboratory prototype.
关键词： partial shading,module level approach,Multi-input converter,photovoltaic system,maximum power point tracking
更新于2025-09-23 15:21:01
-
[IEEE 2018 19th International Conference on Electronic Packaging Technology (ICEPT) - Shanghai (2018.8.8-2018.8.11)] 2018 19th International Conference on Electronic Packaging Technology (ICEPT) - Development on Super-thin & High-Pixel CMOS Image Sensor Module
摘要： This paper systematically reports the development on super-thin and high-pixel CMOS image sensor (CIS) module in terms of substrate design, process development, materials selection and reliability test. The as-developed super-thin chip scale package (SCSP) can greatly reduce the CIS module thickness up to 0.4 mm without sacrificing its reliability.
关键词： Super-thin chip scale package,CIS module,CMOS image sensor
更新于2025-09-23 15:21:01
-
[IEEE 2018 19th International Conference on Electronic Packaging Technology (ICEPT) - Shanghai (2018.8.8-2018.8.11)] 2018 19th International Conference on Electronic Packaging Technology (ICEPT) - Research on Thermal Analysis of Iris Recognition Module Package Structure
摘要： The existing iris recognition module is realized by assembly, which has large volume, high power consumption. The iris recognition module does not conform to the light and thin development trend of integrated circuits. Therefore, the industry is considering building a new iris recognition module from the bare chip and micro interconnect technology. The new module integrates a number of bare chips and passive devices in a limited space, and its thermal performance becomes more complex. It performance systematically. In this paper, thermal performance of the iris recognition module is systematically studied by the finite element method, and the influence of the thermal power of the chip, the thermal conductivity of the material and the area of PCB on the temperature and thermal resistance of the package are discussed. The results show that the thermal conductivity of chip material, the thermal power consumption of chip and the area of PCB have significant influence on packaging junction and thermal resistance of package. Package junction temperature and thermal resistance first decrease rapidly with the heat transfer coefficient of the package material, and then gradually tends to be horizontal, The effect of PCB area on the thermal performance of packaging is similar to that of the loading material, and the thermal dissipation power of the package is linearly increasing with the junction temperature of the package, and it has a horizontal linear relationship with the thermal resistance of the package.
关键词： microinterconnection technology,iris identification module,package junction temperature,package thermal resistance
更新于2025-09-23 15:21:01
-
[IEEE 2019 International Conference on Power Electronics, Control and Automation (ICPECA) - New Delhi, India (2019.11.16-2019.11.17)] 2019 International Conference on Power Electronics, Control and Automation (ICPECA) - Photovoltaic Based Application for Domestic Load
摘要： In this paper, we proposed a decentralized cooperative lane-changing decision-making framework for connected autonomous vehicles, which is composed of three modules, i.e., state prediction, candidate decision generation, and coordination. In other words, each connected autonomous vehicle makes cooperative lane-changing decision independently. In the state prediction module, we employed existing cooperative car-following models to predict the vehicles’ future state. In the candidate decision generation module, we proposed incentive based model to generate a candidate decision. In the candidate decision coordination module, we proposed an algorithm to avoid candidate lane-changing decision that may lead to a vehicle collision or traf?c deterioration to be ?nal decision. Moreover, the effects of decentralized cooperative lane-changing decision-making framework on traf?c stability, ef?ciency, homogeneity, and safety are investigated in a numerical simulation experiment. Some stability, ef?ciency, homogeneity, and safety indicators are evaluated and show the high potential of our proposed framework in traf?c dynamics.
关键词： candidate decision coordination module,state prediction module,decentralized cooperative lane-changing decision-making framework,candidate decision generation module,Connected autonomous vehicles
更新于2025-09-23 15:19:57
-
Robust crystalline silicon photovoltaic module (c-Si PVM) for the tropical climate: future facing the technology
摘要： A critical impediment to the adoption and sustained deployment of crystalline silicon photovoltaic modules (c-Si PVMs) in the tropical climate is the accelerated degradation of their interconnections. At 40.7% c-Si PVM interconnect failure rate worldwide and significantly higher in the tropics. A review of impact of elevated ambient temperature operations on accelerated interconnection degradation is critical to achieving the system’s sustainability and reliability up to the 25-year design lifespan. This study reviews critical module’s operational parameters to advise on the future facing creation of robust module for the tropical region. Key areas reviewed include manufacturing process, solar cell efficiency, interconnection technology and R&D parameters. The review discusses the state-of-the-art in c-Si PVM interconnection technologies and propose back-junction-back-contact (BJ-BC) cell technology for adoption in the manufacture of the next generation of robust c-Si PVM for the tropics. The review findings provide insight into the future facing the robust c-Si PVM technology that is useful to the module design engineers.
关键词： Crystalline silicon photovoltaic module,elevated ambient temperature,interconnection failure,module life span
更新于2025-09-23 15:19:57
-
A new method for evaluating nominal operating cell temperature (NOCT) of unglazed photovoltaic thermal module
摘要： Photovoltaic thermal (PVT) modules convert solar energy into electricity and heat. Unlike that of normal photovoltaic modules, the nominal operating cell temperature (NOCT) of PVT modules, which is used to evaluate the temperature and electrical power output, is unknown because it depends on the mass flow rate and inlet temperature of the working fluid in the module. In this paper, a new method for calculating the NOCT of PVT modules with water as the working fluid is presented. Four unglazed identical PVT modules in series were tested outdoors with various mass flow rates. The tests, which were similar to solar collector tests, were conducted from 8:30 to 16:30 on clear-sky days in Chiang Mai, Thailand, and the water inlet temperature of the first PVT module of the system was varied from 27 to 60 ?C. The correlation between the NOCT of the unglazed PVT module, based on (Tfi ? Ta)/IT , and the water mass flow rate, ˙m, was determined. The calculated PVT module temperature determined with the new NOCT method agrees well with the experimental data, and 96% of the calculated results deviate only by up to ±10% from the experimental data.
关键词： Performance,Photovoltaic thermal module,Module temperature,Nominal operating cell temperature
更新于2025-09-23 15:19:57
-
Environmental impacts and economic feasibility of end of life photovoltaic panels in Australia: A comprehensive assessment
摘要： The severe challenges of the end-of-life management of photovoltaic panels are predicted to enter its critical stage in Australia from the early 2030s owing to the wide-reaching deployment of PV panels in the past two decades. There appears to be a lack of holistic strategy concerning the environmental impacts of disposal scenarios and also enacting of comprehensive local policy and regulations. As a way forward in the promotion of the sustainable management of this complex waste flow, this study performed an inclusive life cycle assessment utilizing SimaPro 9.0.029, and an economic feasibility analysis employing the Discounted Cash Flow (DCF) method for various scenarios. The performed LCA in this paper highlighted the environmental burden and credit responsibilities of an industrial scale treatment procedure proposed for Australia. Findings from the analysis indicated that the domestic treatment of EoL PV module is feasible and includes high-profit margins while making a considerable reduction on environmental burdens and resource losses. The outcome of the economic feasibility assessment has shown some promising numbers for 20,000 tonnes per year of annual PV waste flow. Hence, the variation of the critical economic factors could not affect the feasibility of the treatment pathway. However, the plant with a yearly capacity of 10,000 tonnes EoL PV panels did not show profitability at any condition unless the Australian government considers a special tax-exemption during the loan lifetime. Finally, this study illuminates toward the sustainable management of EoL PV panels and circular economy pathway by providing useful concrete evidence to the decision-makers.
关键词： techno-economic analysis,End-of-life PV module,LCA,Waste management,End-of-life photovoltaic,Cost-effective analysis
更新于2025-09-23 15:19:57
-
SINGLE EMITTER HIGH POWER SEMICONDUCTOR LASER MODULE USING VACUUM SINTERING METHOD
摘要： Based on the research of vacuum sintering technology, we developed a single-emitter high-power semiconductor laser module. The effects of the modules sintered under different conditions of temperature, pressure and time on the reliability of the device are proposed. The control variable is used to analyze the basic parameters of the multi-group modules. The optimal vacuum sintering method is evaluated and finally determined. Semiconductor laser modules sintered at a temperature of 270℃ for 100s and the pressure of 20g enjoy the best stability and reliability.
关键词： The basic performance parameters,Vacuum sintering technology,void ratio,module of semiconductor laser
更新于2025-09-23 15:19:57
-
Photovoltaic module model determination by using the Tellegena??s theorem
摘要： This paper proposes a generalized methodology to calculate the parameters of the single-diode or double-diode models of a photovoltaic module. The presented method relies in the solution by a simple iterative process of the set of equations obtained from the photovoltaic-module’s equivalent circuit. The use of the generalized form of Tellegen’s theorem allows the solving of the equivalent circuit’s equations in an exact way, without making considerations or approximations commonly used in previous works. The parameters of the equivalent circuit are obtained from the standard conditions of: open-circuit, short-circuit and maximum power, provided by the manufacturer in the data sheet of the photovoltaic module. The presented method is applied to obtain the models of several commercial modules. The accuracy of the obtained parameters is greater than that of the results previously determined by other authors. The curves calculated with the obtained models matches the experimental curves supplied in the manufacturer’s data.
关键词： Double-diode model,PV-Module,Single-diode model
更新于2025-09-23 15:19:57