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AIP Conference Proceedings [Author(s) 3RD INTERNATIONAL CONFERENCE ON MATERIALS SCIENCE, RESOURCE AND ENVIRONMENTAL ENGINEERING (MSREE 2018) - Changsha City, China (26–28 October 2018)] - Review of concentrating solar thermal power in China: Status quo, problems and countermeasures
摘要： Currently, the concentrating solar thermal power (CSP) has been confronted with great opportunity for further development. As a strategic emerging industry in China, the CSP meets the appeals of the Belt and Road strategy from manufacturing to practical applications. Therefore, to development the CSP in depth is of vital significance to promote power supply structure transformation, energy saving and emission reduction, as well as energy security in China. However, the development of China’s CSP industry at present is still at the initial stage, with a few problems seriously hindering the large-scale and sustainable development of the industry. In view of this, this paper systematically analyzes China’s CSP industry. Firstly, it conducts a detailed research on the industry status quo. On that basis, it deeply studies the existing issues and future development trend. Finally, it puts forward a series of feasible countermeasures, laying a solid foundation for the development of the CSP industry and the transformation of energy structure in China.
关键词： Concentrating Solar Thermal Power (CSP),China,Power Supply Structure Transformation,Renewable Energy
更新于2025-09-04 15:30:14
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Enhanced solar still productivity using transparent walls with an integral trough and organic porous absorber material
摘要： This experimental work has been conducted to compare the performance of the modified stills with that of the conventional still. Three modified stills (S1, S2, and S3) and conventional still (S4) were fabricated, each with 0.5 m2 of the basin area. S1 and S3 had transparent double glass walls with air in between acting as insulation, whereas S2 has a single transparent wall. S4 has insulated plywood walls painted black from inside. A mixture of coco peat and charcoal was used in S1, S2, and S3, whereas there was no basin material for S4. Experiments were conducted by changing the water quantity in the solar still ranging from 5 to 10 kg. Maximum distillate output of 5.46 l/m2-d was obtained for S2, whereas it was 3.80 l/m2-d for S4 for an average solar radiation intensity of 675 W/m2 (24.3 MJ/m2-d). Use of transparent walls with troughs to collect condensate increased the condenser area by 78.4%. The distillate water cost per liter was estimated as Rs. 0.86 (0.013 US$) and Rs. 1.61 (0.025 US$) for S2 and S4, respectively. Energy payback time for S2 was estimated as 4 months. Theoretical and experimental values showed that there is a significant loss of incoming solar radiation due to wall shadow.
关键词： distillation,solar still,coco peat,Charcoal,wall shadow
更新于2025-09-04 15:30:14
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Review on Li-Fi: an advancement in wireless network communication with the application of solar power
摘要： Light Fidelity, commonly referred to as Li-Fi is a technology that was introduced by a German physicist called Herald Hass. This technology in its own uniqueness considers the use of light (Light Emitting Diode, LED to be specific) as its medium of delivering high speed communication that complies with standard IEEE 802.15.7 bidirectional communication standard. This optical means of communications is also known as visible light communication. It is safer when compared with Wi-Fi network. This paper will focus on Li-Fi applications, comparison with existing technologies like Wi-Fi and the inclusion of an alternative source of power i.e., solar power, as a means of effectively optimizing on the availability and accessibility of the benefits in places where erratic or total power outage is a common trend.
关键词： solar power,Visible Light Communication (VLC),Li-Fi,Wi-Fi
更新于2025-09-04 15:30:14
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Effect of water depth on a novel absorber plate of pyramid solar still coated with TiO2 nano black paint
摘要： In this study, the absorber plate of a new pyramidal basin type solar still is coated with TiO2 nanoparticles doped in black paint on the basin to analyze the performance under the various depth of water. Water depth is varied from 1 cm till 3.5 cm on a basin area of 0.25 m2 which is almost equal to the area of the glass cover. Instead of using other sensible storing materials inside the basin which probably increase the weight, a novel solar still with the absorber plate coated with TiO2 nanoparticle mixed with black paint to improve the performance. Experimental results revealed that the use of TiO2 nanoparticle in black paint improved the water temperature by 1.5oC than that of absorber without nanoparticle. Similarly, the yield improved during the sunshine hours rather than the off shine hours. With increased depth of water in the basin, the water temperature is minimum which simultaneously resulted in the lower yield on absorber without coating whereas the yield from the still improved by 12% at maximum water depth using coated absorber plate. The accumulated yield from the solar still absorber plate with and without coating was found to be 6.6 and 6.2 kg/m2 respectively at 1 cm water depth. TiO2 nano black paint coated pyramid solar still improves the distilled yield by 6.1% as compared to the conventional basin type pyramid solar still. Similarly, the values of instantaneous efficiency based on operational and climatic parameters using linear and non-linear were determined. From the cost breakdown analysis, it is found that the present system is feasible as compared to the conventional pyramid solar still without coating.
关键词： absorption rate,distilled water,nano-paint,pyramid solar still
更新于2025-09-04 15:30:14
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Unique ion diffusion properties in lead-free halide double perovskites: A first-principles study
摘要： Pb-free halide double perovskites (HDPs) are proposed as potential candidates for various optoelectronic applications to replace the mainstream hybrid organic-inorganic halide perovskites, e.g., CH3NH3PbI3. While it is known that ion di?usion is a critical problem to a?ect the structural and electronic stability of CH3NH3PbI3, the mechanism of ion di?usions in HDPs is still unclear and highly desired to be revealed. In this study, taking Cs2AgInX6 (X = Cl, Br) HDPs as prototypes, for the ?rst time we suggest that the fast ion di?usion of the dominant defects may play an important role in the performance stability of HDPs. Importantly, we ?nd that the Agi+ di?usion in a multi-ion concerted fashion has a much faster di?usion rate, compared to the VAg? and VX? di?usion in a single-ion fashion. It is revealed that HDPs exhibit quite di?erent di?usion properties from CH3NH3PbI3. Furthermore, we demonstrate that the di?usion rate of Agi+ in HDPs can be e?ectively suppressed by applying an epitaxial strain, which opens a promising way to enhance the performance stability of perovskite materials for various device applications.
关键词： Lead-free halide double perovskites,Ion di?usion,Performance stability,ab initio calculations,Solar cells
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) - Palermo (2018.6.12-2018.6.15)] 2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) - Economic Viability of Residential PV Systems with Battery Energy Storage Under Different Incentive Schemes
摘要： The high penetration of distributed renewable energy sources (DRESs), and especially photovoltaics (PVs), in LV distribution grids questions their safe and reliable operation. In this context, battery energy storage (BES) systems can be an effective solution to reduce the intermittency of electricity generated by DRESs and to enhance the resilience of power systems. However, it is unclear how different incentive schemes and regulatory frameworks affect the BES profitability for prosumers, compared with no incentives at all. In this paper, a techno-economic model is developed to investigate the economic viability of BES for residential PVs, operated under different incentive schemes. The input parameters of the model include typical load and generation profiles, electricity prices as well as typical PV and BES costs. Using these data, an optimization procedure based on an exhaustive search is performed and the optimal size of the integrated PV-BES system is derived.
关键词： Battery energy storage systems,techno-economic modeling,photovoltaics,net-metering,solar power
更新于2025-09-04 15:30:14
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Synthesis of novel form-stable composite phase change materials with modified graphene aerogel for solar energy conversion and storage
摘要： In this study, novel kinds of form-stable composite phase change materials (FS-CPCM) were prepared by the vacuum impregnation method. In the FS-CPCM, lauric acid (LA) was the PCM, and LA was grafted on the surface of graphene aerogel (GA) by an esteri?cation reaction and reduction process to prepare supporting material and increase the thermal conductivity of the FS-CPCMs. The microstructure, thermal storage properties, thermal conductivity and light-to-heat conversion of the FS-CPCMs were investigated. Scanning electron microscopy and Fourier transform infrared spectroscopy were used to demonstrate that the LA was encapsulated e?ectively in the porous structure of the LA-GA, and the LA/LA-GA FS-CPCMs were prepared successfully. X–ray di?ractometer results con?rmed that the crystallization of the LA/LA-GA FS-CPCM was better than that of LA/GA FS-CPCM. Thermal conductivity analyses indicated that the thermal conductivities of the LA/LA-GA-1 FS-CPCMs increased 352.1% and 32.6% compared with the conductivities of LA and LA/GA FS-CPCM, respectively. Di?erential scanning calorimetry results con?rmed that the LA/LA-GA-1 FS-CPCM possess good phase change behavior, low undercooling and excellent thermal cycling stability. The melting enthalpy and freezing enthalpy could reach 207.3 J/g and 205.8 J/g, respectively, and the LA/LA-GA FS-CPCM exhibited good thermal reliability and stability. Furthermore, the LA/LA-GA FS-CPCM had excellent photon absorption and the highest e?ciency in terms of light-to-heat conversion of 80.6%. Such good performances demonstrate the LA/LA-GA FS-CPCM's potential for use in solar energy storage systems.
关键词： Phase change materials,Thermal conductivity,Graphene aerogel,Solar energy conversion
更新于2025-09-04 15:30:14
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Cuk Converter Based BLDC Motor for Water Pumping System Using Solar Energy Source
摘要： Background: The Cuk converter is used to control DC link voltage between the PV and VSI. The CCM is implemented in Cuk converter to control the DC bus voltage and this helps to minimize the losses in DC-DC converter. Methods: The speed of the BLDC motor is controlled by voltage source inverter with PWM control. The PWM pulse is generated by using Hall Effect sensor. Results: The PWM switching of BLDC motor provides reduced switching losses and increasing the efficiency. Conclusions: The prototype model of this circuit also developed and its performance characteristics also verified. The switching losses are reduced by using Cuk converter. The VSI also reduced the switching losses by operation in 120 degree conduction mode. The speed of the BLDC motor is effectively controlled by hall signals.
关键词： BLDC motor,Cuk converter,VSI,PWM pulse,Hall effect sensor,Solar power
更新于2025-09-04 15:30:14
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Studies on Different Doped Zn Concentrations of CdSe Thin Films
摘要： Different Zn concentration was doped with CdSe thin films by Electron Beam Evaporation method. Crystallite variation was studied for doping effect and it was found to be about 40 to 50 nm respectively. Optical band gap values are found to be modified by doping as well as annealing. Annealed films showed considerable influence in their opto-elctronic and structural properties, which provided improvement in conversion efficiency of about 2.75% and 2.87% respectively.
关键词： PEC solar cells,Electron beam evaporation,Doping effect,XRD of CdSe
更新于2025-09-04 15:30:14
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Accurate mobile remote sensing of XCO<sub>2</sub> and XCH<sub>4</sub> latitudinal transects from aboard a research vessel
摘要： A portable Fourier transform spectrometer (FTS), model EM27/SUN, was deployed onboard the research vessel Polarstern to measure the column-average dry air mole fractions of carbon dioxide (XCO2) and methane (XCH4) by means of direct sunlight absorption spectrometry. We report on technical developments as well as data calibration and reduction measures required to achieve the targeted accuracy of fractions of a percent in retrieved XCO2 and XCH4 while operating the instrument under field conditions onboard the moving platform during a 6-week cruise on the Atlantic from Cape Town (South Africa, 34? S, 18? E; 5 March 2014) to Bremerhaven (Germany, 54? N, 19? E; 14 April 2014). We demonstrate that our solar tracker typically achieved a tracking precision of better than 0.05? toward the center of the sun throughout the ship cruise which facilitates accurate XCO2 and XCH4 retrievals even under harsh ambient wind conditions. We define several quality filters that screen spectra, e.g., when the field of view was partially obstructed by ship structures or when the lines-of-sight crossed the ship exhaust plume. The measurements in clean oceanic air, can be used to characterize a spurious air-mass dependency. After the campaign, deployment of the spectrometer alongside the TCCON (Total Carbon Column Observing Network) instrument at Karlsruhe, Germany, allowed for determining a calibration factor that makes the entire campaign record traceable to World Meteorological Organization (WMO) standards. Comparisons to observations of the GOSAT satellite and concentration fields modeled by the European Centre for Medium-Range Weather Forecasts (ECMWF) Copernicus Atmosphere Monitoring Service (CAMS) demonstrate that the observational setup is well suited to provide validation opportunities above the ocean and along interhemispheric transects.
关键词： solar tracker,EM27/SUN,atmospheric greenhouse gases,XCO2,XCH4,Fourier transform spectrometer,shipborne measurements
更新于2025-09-04 15:30:14