Search results for " experimental data"

showing 6 items of 6 documents

Look for methods, not conclusions

2019

Qualunque sia l'esito effettivo di un'indagine su un caso di presunta manipolazione dei dati, ci sono alcuni principi fermi che sono sempre veri e alcuni errori che devono essere evitati.

Cancer ResearchMolecular biologyPeer ReviewScienceImmunologyScientific MisconductSettore AGR/13 - Chimica Agrariamethods; verification experimental datasetresearch integrityDiseasesmethodsCellular and Molecular NeuroscienceCorrespondenceScientific methodHumansexperimental datasetlcsh:QH573-671Scientific misconductPeer Review Researchlcsh:CytologyResearchCell BiologyEngineering ethicsverificationPsychologyHumans; Peer Review Research; Science; Scientific Misconduct
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A novel implicit correlation for the operative temperature of a PV panel

2012

Abstract The operating temperature of a commercial PV panel strongly affects the electric power output of the devices. The prediction of the operating temperature therefore plays a central role in the economic and energy assessment of PV systems. The authors propose a new implicit correlation that takes into account the standard weather variables but also the regimen of PV panel in terms of the proximity to the maximum power points. Data coming from an experimental setup were processed by using the least squares technique. To validate the reliability of the correlation, a comparison between expected values and data from other common correlations were done. The results show that the regimen …

EngineeringOperative temperatureleast squares techinqueSettore ING-IND/11 - Fisica Tecnica AmbientaleMaximum power principlebusiness.industryPhotovoltaic systemPV cell temperatureGeneral MedicineLeast squaressolar cellCorrelationReliability (semiconductor)Operating temperatureControl theoryPV cell temperature; least squares techinque; experimental data; solar cellexperimental dataEconometricsElectric powerbusiness
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Photoconductivity and photovoltaic effect in indium selenide

1983

Transport and phototransport properties of crystalline indium monoselenide (InSe) doped with a variety of elements are reported. Measured mobilities, lifetimes, and effective diffusion lengths of photoexcited carriers are used to interpret electrical and photovoltaic properties of several different structures. These include p‐n junctions, bismuth/p‐type InSe, platinum/n‐type InSe, and indium tin oxyde (ITO)/p‐type InSe. External solar efficiencies of the best devices are between 5% and 6%. The influence on the efficiency of the various parameters is evaluated, and ways of improvement are discussed.

Materials sciencePhotoconductivityInorganic chemistryN−Type ConductorsGeneral Physics and Astronomychemistry.chemical_elementPhotovoltaic effectIndium CompoundsEfficiencyCrystalsBismuthPhotovoltaic EffectCharge Carrierschemistry.chemical_compoundP−Type ConductorsIndium Selenides ; Photoconductivity ; Photovoltaic Effect ; Experimental Data ; Crystals ; Doped Materials ; Mobility ; Lifetime ; Diffusion Length ; Charge Carriers ; Electrical Properties ; P−N Junctions ; P−Type Conductors ; N−Type Conductors ; Bismuth ; Platinum ; Indium Compounds ; Tin Oxides ; Efficiency:FÍSICA [UNESCO]SelenideDoped MaterialsPlatinumMobilityIndium Selenidesbusiness.industryPhotoconductivityElectrical PropertiesDopingP−N JunctionsUNESCO::FÍSICATin OxidesDiffusion LengthchemistryOptoelectronicsExperimental DataCharge carrierTinbusinessBismuthIndiumLifetime
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Electrical and photovoltaic properties of indium‐tin‐oxide/p‐InSe/Au solar cells

1987

Conditions for efficiency improvement and optimization in indium‐tin‐oxide/p‐indium‐selenide solar cells are discussed in this paper. This aim is achieved by using low‐resistivity p‐indium‐selenide and by incorporating a back‐surface‐field contact. This contact is insured by a p‐indium selenide/gold barrier whose rectifying behavior is explained through the complex impurity structure of p‐indium‐selenide. Electrical and photovoltaic properties of the cells are also reported. The efficiency parameters under AM1 simulated conditions have been improved up to 32 mA/cm2 for the short‐circuit current density, 0.58 V for the open‐circuit voltage, and 0.63 for the filling factor. As a result, solar…

OptimizationMaterials sciencePerformanceIndium OxidesGeneral Physics and Astronomychemistry.chemical_elementEfficiencyPhotovoltaic effectIndium Selenide Solar CellsPhotovoltaic Effectchemistry.chemical_compound:FÍSICA [UNESCO]Selenidebusiness.industryElectrical PropertiesOptimization ; Efficiency ; Indium Selenide Solar Cells ; Performance ; Indium Oxides ; Tin Oxides ; Photovoltaic Effect ; Electrical Properties ; Experimental DataPhotovoltaic systemEnergy conversion efficiencyUNESCO::FÍSICATin OxidesSolar energyIndium tin oxidechemistryExperimental DataOptoelectronicsbusinessCurrent densityIndiumJournal of Applied Physics
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Entropic approach to estimate the mean flow velocity: experimental investigation in laboratory flumes

2015

The paper deals with the linear entropic relationship between the maximum velocity, u max , and the mean flow velocity, u m , through a dimensionless parameter Φ(M), in open-channel flow. The analysis is conducted with the aid of experimental data collected in straight laboratory flumes under different bed and side-walls roughness conditions. In particular, rough/vegetated beds and smooth/rough side-walls conditions have been investigated. The results show that, in the investigated conditions (with exception of low-submergence vegetated bed—h/k v  < 2), Φ(M) can be assumed equal to a value that is very close to that found in natural channels. This demonstrates that Φ(M) is able to implicitl…

Physics::Fluid DynamicsFlow resistanceHydrogeologyEnvironmental ChemistryThermodynamicsGeometrySurface finishMean flow velocityFlow discharge entropy flow velocity profile experimental dataSettore ICAR/01 - IdraulicaWater Science and TechnologyDimensionless quantityMathematicsEnvironmental Fluid Mechanics
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EXPERIMENTAL INVESTIGATION OF DILUTE SOLID-LIQUID SUSPENSION IN AN UNBAFFLED STIRRED VESSELS BY A NOVEL PULSED LASER BASED IMAGE ANALYSIS TECHNIQUE

2009

The availability of experimental information on solid distribution inside stirred tanks is a topic of great importance in several industrial applications. The measurement of solid particle distribution in turbulent multiphase flow is not simple and the development of suitable measurement techniques is still in progress. In this work a novel non-intrusive technique for measuring particle concentration fields in solid-liquid systems is employed. The technique makes use of a laser sheet, a high sensitivity digital camera for image acquisition and a Matlab procedure for post-processing the acquired images. Experimental data are here obtained for the case of an unbaffled stirred tank. Stable tor…

lcsh:Computer engineering. Computer hardwareSettore ING-IND/25 - Impianti Chimicilcsh:TP155-156lcsh:TK7885-7895lcsh:Chemical engineeringThe availability of experimental information on solid distribution inside stirred tanks is a topic of great importance in several industrial applications. The measurement of solid particle distribution in turbulent multiphase flow is not simple and the development of suitable measurement techniques is still in progress. In this work a novel non-intrusive technique for measuring particle concentration fields in solid-liquid systems is employed. The technique makes use of a laser sheet a high sensitivity digital camera for image acquisition and a Matlab procedure for post-processing the acquired images. Experimental data are here obtained for the case of an unbaffled stirred tank. Stable toroidal attractors for particles are observed under given circumstances. Their existence consistency and extension depends on particle type fluid properties tank geometry and impeller velocity.Chemical Engineering Transactions
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