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Assessment of the carbon emissions reduction potential in Thailand’s power sector with high penetration of variable renewable energy sources and electric vehicles in the year 2030

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Clean Energy 2023年第6期7卷 1391-1401页

作者： Niphit Phothisourinh jai Govind singh Department of Energy Environment and Climate ChangeSchool of EnvironmentResources and DevelopmentAsian Institute of TechnologyPathum ThaniThailand

The power sector has substantial carbon emissions reduction potential that could achieve the new nationally determined contribution target in 2030 by increasing low-carbon technologies,*** renewable energy sources and electric vehicles(EVs).Therefore,two approaches were suggested in this *** the first approach,Thailand’s power sector was modelled by using PLEXOS software to find the impact of the high penetration of variable renewable energy(RE)and EV charging load for the projected year *** second approach proposed a demand-response and energy storage system solution with carbon pricing in the model to assess the *** a result,the electricity demand from charging EVs will cause a new peak.demand at night,while the high variable RE penetration will cause curtailment in the power system due to excess supply at ***,Thailand’s power sector has the potential for carbon emissions reduction by 45%with clean energy technologies,which could increase to 68%with carbon pricing,easily achievable by the nationally determined contribution target in ***,these benefits could only be derived if various entities involved in the energy regulatory,transport and power sectors coordinate to implement the required technological and financial policies.

关键词： Thailand power sector CO_(2)reduction carbon neutrality low-carbon technologies PLEXOS carbon pricing demand-response electric vehicles

Factors affecting electric vehicle acceptance,energy demand and CO_(2)emissions in Pak.stan

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Green Energy and Intelligent Transportation 2023年第3期2卷 3-15页

作者： Muhammad Huzaifa Butt jai Govind singh Department of Energy Environment and Climate ChangeSchool of Environment and Resources DevelopmentAsian Institute of TechnologyThailand

This work.aims to investigate the factors accelerating electric vehicle(EV)acceptance at the consumer end in Pak.stan and analyzes the implications for policymak.rs for a fast-track.EV *** study further in-vestigates the high EV penetration scenario resulting from the technology acceptance model(TAM's 80%EV)and its impact on energy demand and CO_(2)*** study design used a quantitative analysis method with the survey as an instrument for data collection regarding EV *** model under investigation was adapted from the famous Technology-Acceptance Models(TAMs)and modified with other significant predictors evidenced in the *** and stepwise regression were performed with a multicollinearity check.for model hypothesis *** of six predictors,only four factors were significant in accelerating the EV *** policies were found to be highly significant,followed by environmental concern,facilitating conditions and perceived ease of *** research then used exponential smoothing forecasts for transport demand and developed an EV penetration scenario based on modified TAM *** results highlight the significant in-crease in transport demand and the opportunity for Pak.stan to limit passenger transport emissions to 36.6 MT instead of 61.6 MT by 2040.

关键词： Pak.stan electric vehicle adoption Technology acceptance model Electric vehicle adoption Public acceptance Pak.stan transport energy demand Pak.stan transport emissions

Impact of interconnections and renewable energy integration on the Philippine-Sabah Power Grid systems

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Global Energy Interconnection 2023年第3期6卷 253-272页

作者： Tristan G.Magallones,Jr. jai Govind singh Department of Energy Environment and Climate ChangeSERDAsian Institute of TechnologyPathumthani 12120Thailand Department of Electrical Engineering Central Mindanao UniversityBukidnon 8710Philippines

This study presents a comprehensive impact analysis of the rotor angle stability of a proposed international connection between the Philippines and Sabah,Malaysia,as part of the Association of Southeast Asian Nations(ASEAN)Power *** study focuses on modeling and evaluating the dynamic performance of the interconnected system,considering the high penetration of renewable *** flow,small signal stability,and transient stability analyses were conducted to assess the ability of the proposed link.d power system models to withstand small and large disturbances,utilizing the Power Systems Analysis Toolbox(PSAT)software in *** components used in the model are documented in the PSAT ***,there is a lack.of publicly available studies regarding the implementation of this specific ***,the study investigates the behavior of a system with a high penetration of renewable energy *** on the findings,this study concludes that a system is generally stable when interconnection is realized,given its appropriate location and dynamic component ***,the critical eigenvalues of the system also exhibited improvement as the renewable energy sources were augmented.

关键词： Modeling of ASEAN Power Grid Rotor angle stability of asynchronous Philippine-Sabah interconnection in ASEAN Power Grid The impact of renewable energy integration on Philippine-Sabah interconnection in ASEAN Power Grid

A novel inertia emulator to reduce the rate of change of frequency for power systems with solar PV and battery energy storage

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Clean Energy 2023年第4期7卷 873-884页

作者： R Raja Nivedha jai Govind singh Weerak.rn Ongsak.l Department of Energy Environment and Climate ChangeAsian Institute of TechnologyThailand

Energy access,climate change and public health issues are some major drivers for the need for renewable ***,most renewable sources,excluding large hydro,have zero or negligible rotational inertia,which is critical to stabilizing the power system after ***,this paper proposes a droop-based inertia emulator to reduce the rate of change of frequency and frequency *** robustness of the controller is analysed by applying various uncertainties and disturbances of power system components that were carried out using DIgSILENT PowerFactory *** obtained results are compared with existing literature and the desired performance shows an improvement in the rate of change of frequency of 34.78%for an IEEE 6-bus system,24.32%for a 12-bus system and 18%for a 39-bus system.

关键词： control of the rate of change of frequency low-inertia power system inertia emulator control rate of change of frequency impact of solar PV on frequency control impact of battery storage on inertia and frequency control

Hunting of hunted:an ensemble modeling approach to evaluate suitable habitats for caracals in India

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Ecological Processes 2022年第1期11卷 744-757页

作者： Ashish k.mar Jangid Chandra Prak.sh singh jai singh Parihar Jasbir singh Chauhan Rajnish k.mar singh Prak.sh k.mar Verma Amritanshu singh Shantanu Sharma Shek.ar k.lipak. Wildlife Institute of India DehradunUttarakhand 248001India Space Applications Centre Indian Space Research OrganisationAhmedabadGujarat 380015India Madhya Pradesh State Forest Department Madhya Pradesh Tiger Foundation SocietyKuno National ParkBhopalMadhya Pradesh 462001India Leo Foundation WageningenThe Netherlands

Back.round:Large-scale hunting and various anthropogenic pressures in the recent past have pushed the Asiatic caracal(Caracal caracal schmitzi),an elusive medium-sized and locally threatened felid species towards local extinction in *** widely distributed historically,it has been sparsely reported from several regions of central and northern states in India till twentieth ***,the species distribution became confined only to the states of Rajasthan,Gujarat and Madhya Pradesh,which have had reported sightings in the twenty-first *** order to highlight the potentially suitable habitats for Asiatic caracals in India,we targeted forth-filtering of the spatial model ensemble by creating and utilizing the validated and spatially thinned species presence information(n=69)and related ecological variables(aridity,NDVI,precipitation seasonality,temperature seasonality,terrain ruggedness),filtered with anthropological variable(nightlight).Results:Out of eight spatial prediction models,the two most parsimonious models,Random Forest(AUC 0.91)and MaxEnt(AUC 0.89)were weighted and *** ensemble model indicated several clustered habitats,covering 1207.83 k.^(2)areas in k.chchh(Gujarat),Aravalli mountains(Rajasthan),Malwa plateau(Rajasthan and Madhya Pradesh),and Bundelk.and region(Madhya Pradesh)as potentially suitable habitats for *** probabilities of pixels were further regressed with converted vegetation height data within selected highly potential habitats,i.e.,Ranthambore k.no Landscape(Rk.)(suitability~0.44+0.03(vegetation height)^(**),R^(2)=0.27).The regression model inferred a significant positive relation between vegetation height and habitat suitability,hence the lowest ordinal class out of three classes of converted vegetation height was mask.d out from the Rk.,which yielded in an area of 567 k.^(2) as potentially highly suitable habitats for caracals,which can be further proposed as survey areas and conservation priority are

关键词： Medium-sized cat Caracal caracal schmitzi Potentially suitable habitat Drylands Potential survey area

DFT and TD-DFT Calculations of Orbital Energies and Photovoltaic Properties of Small Molecule Donor and Acceptor Materials Used in Organic Solar Cells

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Journal of Renewable Materials 2022年第10期10卷 2553-2567页

作者： Daniel Dodzi Yao Setsoafia k.ran Sreedhar Ram Hooman Mehdizadeh-Rad David Ompong Vinuthaa Murthy jai singh College of Engineering IT and EnvironmentPurple 12Charles Darwin UniversityDarwinNT 0909Australia Energy and Resources Institute Charles Darwin UniversityDarwinNT 0909Australia

DFT and TD-DFT calculations of HOMO and LUMO energies and photovoltaic properties are carried out on four selected pentathiophene donor and one IDIC-4F acceptor molecules using B3LYP and PBE0 functionals for the ground state energy calculations and CAM-B3LYP functional for the excited state *** discrepancy between the calculated and experimental energies is reduced by correlating them with a linear *** fitted energies of HOMO and LUMO are used to calculate the Voc of an OSC based on these donors and acceptor blend and compared with experimental *** the Scharber model the calculated PCE of the donor-acceptor molecules agree with the *** has been found that fluorine substitution can be used to improve charge transport by reducing the electron and hole reorganization energies of the *** is also found that the introduction of fluorine onto the donor pentathiophene unit of the donor molecule results in a change of polarity of the distributed charges in the molecule due to the high electronegativity of the fluorine *** quantum chemical potential(μ),chemical hardness(η)and electronegativity(χ),and electrostatic potential maps(EPMs)are also calculated to identify different charge distribution regions in all five molecules.

关键词： Acceptor donor DFT excitons HOMO LUMO small molecule electrophilic nucleophilic and reorganization energy

The clinical outcomes of laser with suction device in mini-percutaneous nephrolithotomy

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Asian Journal of Urology 2022年第1期9卷 63-68页

作者： Abhishek.Gajendra singh Sundaram Palaniappan Shrik.nt jai Gopal Tak.Arvind Ganpule Ravindra Sabnis Mahesh Desai Department of Urology Muljibhai Patel Urological HospitalVirendradesai MargNadiadGujaratIndia

Objective:To evaluate the safety,efficacy and feasibility of laser with suction device in mini-percutaneous nephrolithotomy(mini-PCNL).Methods:A retrospective study was conducted including 200 patients who underwent mini-PCNL for renal *** patients underwent PCNL using Electro-Medical Systems *** addition to the laser in 100 patients,a suction device was used(laser with suction[LWS]).In the other 100,suction device was not used(laser with no additional suction[LOS]).Mini-PCNL was performed using standard technique and k.rl Storz minimally invasive PCNL-medium system was *** end point was stone ***:Both the groups were comparable in terms of demographic *** stone size was 15.24±5.90 mm and 16.16±5.53 mm in LWS and LOS,*** Hounsfield unit of stone was 1285.64 and 1206.79 in LWS and LOS,*** time was less in LWS group(56.89±19.65 min)as compared to LOS(62.01±28.81 min).At one-month follow-up,radiological complete clearance was 96%in LWS and 92%in *** subgroup analysis of stones larger than 18 mm,the clearance rate was in favour of LWS(85.7%vs.100%)and also the need for nephrostomy placement was less in LWS ***:LWS device is safe and efficacious when used with *** stones greater than 18 mm,it has a better stone free rate as compared to using no suction.

关键词： Mini-percutaneous nephrolithotomy Laser with suction Stone clearance

CFD modeling to study the effect of particle size on dispersion in 20l explosion chamber: An overview

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International Journal of Mining Science and Technology 2020年第3期30卷 321-327页

作者： Santosh k.mar Ray Niroj k.mar Mohalik.Asfar Mobin k.an Debashish Mishra Nik.il k.mar Varma jai k.ishna Pandey Pradeep k.mar singh CSIR-Central Institute of Mining and Fuel Research Dhanbad 826001India

Mine disasters occur predominantly due to methane or coal dust explosion or a combination of *** the top ten worst coal mine disasters in India, nine are due to coal dust explosion. The current paper describes a general overview of the parameters causing dispersion leading to coal dust explosion,and computational fluid dynamics(CFD) simulation study to observe the effects of particle size on dispersion in Indian coal mines. Turbulent k.netic energy(Tk.) and velocity vector path of dust-air mixture and dust-free air were simulated to understand their effects on coal dust dispersion. The Tk. contours and velocity vector paths for dust-free air were uniform and symmetrical due to resistance-free path available. The Tk. contours and velocity vector paths for dust-air mixture shows the asymmetrical distribution of contours, due to entrainment of air with dust particles. Vortices were observed in velocity vector paths which gradually diminish on increment of time sequence. These vortices are dead centres where velocity and coal dust particles concentration are both zero.

关键词： Coal dust explosibility CFD 20l explosion chamber Dispersion Turbulent k.netic energy

Resolution Enhancement of Optical Surface Plasmon Resonance Sensor Using Metamaterial

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Photonic Sensors 2015年第4期5卷 330-338页

作者： Sarik. PAL Y. k. PRAJAPATI J. P. SAINI V. singh Sarik. Pal Department of Electronics & Communication Engineering KIET Ghaziabad (U.P.) India yogendra k.mar Prajapati Department of Electronics & Communication Engineering MNNIT Allahabad-211004 (U.P.) India jai Prak.sh Saini Department of Electronics & Communication Engineering BIET Jhansi-284128 (U.P.) India Vivek.singh Department of Physics Faculty of Science Banaras Hindu University Varanasi (U.P.) India

In this paper, we present and discuss a an optical surface plasmon resonance （SPR） path to extend the enhancement of the resolution of sensor. Basically, our approach is to combine bi-metamaterial layers to design the SPR sensor. The calculation shows that the proposed SPR sensor structure has a preference over the conventional SPR sensors and bimetallic SPR sensors since it gives a much sharper reflectance dip and can achieve considerable sensitivity improvement when compared to the recently reported investigations. The effects of the metamaterial permittivity, permeability, and thick.ess on the reflectance curve are studied. It is also seen that metamaterial layers improve the field of the proposed SPR structure, which may provide a novel tool to significantly enhance the sensitivity and resolution of the sensors.

关键词： Surface plasmon resonance sensor metamaterials Fresnel equations reflectance