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An analysis of the implementation of a hybrid renewable-energy system in a building by considering the reduction in electricity price subsidies and the reliability of the grid

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Clean Energy 2023年第5期7卷 1125-1135页

作者： Rahmat Adiprasetya Al Hasibi abdul Haris Department of electrical engineering Universitas Muhammadiyah YogyakartaBantulYogyakarta 55183Indonesia

This article discusses the implementation of a hybrid renewable-energy system to satisfy the electricity requirements of a *** analysis is based on optimization calculations performed using HOMER *** components of the simulated hybrid renewable-energy system include photovoltaics,generators powered by biogas,converters and a *** input data utilized by the HOMER software are derived from measurements and *** electric load curve is obtained through measurements at the location of the case *** surveys,parameters pertaining to the components of the hybrid renewable-energy system were *** analysis was carried out using two sensitivity variables,namely electricity price and grid *** the basis of these two sensitivity variables,optimal system configuration,net present cost,energy cost,return on investment,internal rate of return and payback period were *** results of the analysis indicated that reducing subsidies,which results in higher electricity prices,provided opportuni-ties for economically competitive hybrid renewable-energy *** electricity prices of US$0.094/kWh,the return of investment and the internal rate of return increased to 15%and 19%,respectively,and the payback period decreased to 5.3 *** a hybrid renewable-energy system is implemented in regions with low grid reliability,the same phenomenon occurs.

关键词： renewable energy sensitivity analysis photovoltaic biogas electricity subsidy reliability of the grid

Risk Assessment of Metal Contamination in Soil and Groundwater in Asia： A Review of Recent Trends as well as Existing Environmental Laws and Regulations

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Pedosphere 2016年第4期26卷 431-450页

作者： Tianlik TEH Nik abdul Rahman NIK NORULAINI Mohammad SHAHADAT Yoonsing WONG abdul Kadir MOHD OMAR Department of Environmental Technology School of Industrial Technology Universiti Sains Malaysia 11800 Penang School of Distance Education Universiti Sains Malaysia 11800 Penang

Asia is experiencing a more rapid economic growth compared to any other regions. The contamination of soil and groundwater with metals can mainly be attributed to human activities; therefore, risk assessments to characterize the nature and magnitude of risks to humans and ecological receptors from contaminants are important. Risk assessments are often iterative processes, which involve identification and filling data gap. Experimental samplings, geostatistical and multivariate statistical methods as well as multimedia risk assessment modeling are the three major methodologies used in the assessment of metal contamination in soil and *** review highlights a number of measurements for improving risk calculation methods and expounds scientific approaches that involve the identification of the major source of contamination, exposure pathways and bioavailability of metals. In general, risk assessments of metals in soil and groundwater worldwide are mainly focused on the levels of contamination, identification of exposure pathways, and prediction of the probability of contamination. To date, very limited studies have reported the development of relevant environmental laws and policies in the regulation of soil and groundwater contamination in Asia. The development, variations and limitations in the regulations of soil and groundwater contamination among developed countries may provide helpful guidance for the developing countries in Asia.

关键词： bioavailability of metals environmental regulation exposure pathway levels of contamination source of contamination

The effect of altering crosslinker chemistry during interfacial polymerization on the performance of nanofiltration membranes for desalination, organic, and micropollutants removal

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Frontiers of Chemical Science and Engineering 2023年第12期17卷 2025-2036页

作者： Jamilu Usman abdul Waheed Umair Baig Isam HAljundi Interdisciplinary Research Centre for Membranes and Water Security King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Chemical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

Chemistry of the polyamide active layer of a desalination membrane is critical in determining both its physical and chemical *** this study,we designed and fabricated three novel membranes with different active layers using the crosslinkers:terephthaloyl chloride,isophthaloyl chloride,and trimesoyl *** crosslinkers were reacted with an aqueous solution of an aliphatic *** these crosslinkers differ in their structures and crosslinking mechanisms during interfacial polymerization,the resultant membranes also possess different structural *** water contact angle of the fabricated membranes also varies;the water contact angles of 4A-3P-TPC@PSF/PET,4A-3P-TMC@PSF/PET,and 4A-3P-IPC@PSF/PET,are 68.9°,65.6°,and 53.9°,***,the desalination performance of resultant membranes also showed variations,with 4A-3P-TPC@PSF/PET,4A-3P-IPC@PSF/PET,and 4A-3P-TMC@PSF/PET having a permeate flux of 17.14,25.70,and 30.90 L·m^(−2)·h^(−1),respectively,at 2.5 *** 4A-3P-TPC@PSF/PET membrane exhibited extensive crosslinking with aliphatic linear amine,and cationic dye rhodamine B,MgCl_(2),and amitriptyline rejection rates of 98.6%,92.7%and 80.9%,*** 4A-3P-TMC@PSF/PET membrane showed mediocre performance,while 4A-3P-IPC@PSF/PET membrane showed even lower performance,with a 35%rejection of methyl orange dye.

关键词： acid chlorides covalent crosslinking desalination linear aliphatic amine micropollutant removal thin film composite membranes

X-Ray Diffraction Study of Plasma Exposed and Annealed AlSb Bilayer Thin Film

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Plasma Science and Technology 2013年第4期15卷 382-385页

作者： T. abdul KAREEM A. Anu KALIANI PG and Research Department of Physics Kongunadu Arts and Science College CoimbatoreTamilnadu 641029 India

Aluminum antimony seems to be a promising semiconducting material for high temperature applications, especially for transistors and P-N junction diodes. Additionally, it is a highly efficient solar material. This paper discusses the plasma induced bilayer diffusion of A1Sb bilayer thin films using X-ray diffractogram. A1Sb bilayer thin films were prepared on a glass substrate by vacuum evaporation technique. The effect of plasma exposure time and annealing temperature on the micro-structural parameters were investigated. X-ray diffraction studies show that the cubic crystals of A1 orient along the （111） plane and the hexagonal crystals of Sb orient along the （003） plane. Newly formed cubic crystals of A1Sb are oriented along the （200） plane and they are formed due to the simultaneous growth of A1 and Sb crystals during plasma exposure.

关键词： Aluminum antimony bilayer plasma exposure bilayer mixing

Mathematical models for process commonality under quality and resources breakdown in multistage production

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第11期12卷 837-848页

作者： Mohammed abdul WAZED Shamsuddin AHMED Yusoff Bin NUKMAN Department of Engineering Design and Manufacture University of Malaya Department of Mechanical Engineering Chittagong University of Engineering and Technology(CUET)

It is essential to manage customers' diverse desires and to keep manufacturing costs as low as possible for survival in competition and eventually in *** resources in manufacturing for different products is a vital method of accomplishing this *** advantages of using a common process in production are stated in the ***,the mathematical models as well as simulation or conceptual models are not *** main objective of this paper is to develop mathematical models for multiproduct and multistage production under quality and breakdown *** idea of the process commonality is incorporated in the proposed *** models are validated by primary data collected from a Malaysian company and comparison of the timely requirement schedules of earlier MRP II and the proposed models under stable and perfect production *** appreciable convergence of the outcomes is ***,the proposed models are carrying additional information about the available locations of the parts in a time *** validation,the effects of process commonality on cost,capacity and the requirement schedule under uncertainties are *** is observed that the use of common processes in manufacturing is always better than the non-commonality scenario in terms of production ***,the increase in capacity requirement for commonality designs is higher for an ideal system,while it is less when the system suffers from breakdowns and a quality problem.

关键词： Process commonality Mathematical model MRP II Quality Breakdown

Locus coeruleus-norepinephrine: basic functions and insights into Parkinson’s disease

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Neural Regeneration Research 2020年第6期15卷 1006-1013页

作者： Bilal abdul Bari Varun Chokshi Katharina Schmidt The Solomon H.Snyder Department of Neuroscience Brain Science InstituteKavli Neuroscience Discovery InstituteThe Johns Hopkins University School of MedicineBaltimoreMDUSA Department of Physiology The Johns Hopkins University School of MedicineBaltimoreMDUSA

The locus coeruleus is a pontine nucleus that produces much of the brain's *** its small size,the locus coeruleus is critical for a myriad of functions and is involved in many neurodegenerative and neuropsychiatric *** this review,we discuss the physiology and anatomy of the locus coeruleus system and focus on norepinephrine's role in synaptic *** highlight Parkinson's disease as a disorder with motor and neuropsychiatric symptoms that may be understood as aberrations in the normal functions of locus coeruleus.

关键词： catecholamines copper neurodegenerative diseases neuromodulation neuronal circuits neuropsychiatric symptoms noradrenaline synaptic plasticity

Generalized Ghost Pilgrim Scalar Field Models of Dark Energy

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Communications in Theoretical Physics 2015年第11期64卷 590-596页

作者： abdul Jawad Ujjal Debnath Fazal Batool Department of Mathematics COMSATS Institute of Information Technology Department of Mathematics Indian Institute of Engineering Science and Technology Department of Mathematics Lahore Leads University

We assume generalized ghost Pilgrim dark energy(GGPDE) model in the presence of cold dark matter in flat FRW *** suitable choice of interaction term between GGPDE and cold dark matter,we investigate the nature of equation of state parameter for ***,we investigate the natures of dynamical scalar field models(such as quintessence,tachyon,k-essence,and dilaton dark energy) and concerned potentials through the correspondence phenomenon between GGPDE and these models.

关键词： generalized ghost Pilgrim dark energy scalar field

Specific Capacitance and Cyclic Stability of Graphene Based Metal/Metal Oxide Nanocomposites:A Review

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Journal of Materials Science & Technology 2015年第7期31卷 699-707页

作者： abdul Waheed Anwar abdul Majeed Nadeem Iqbal Wasi Ullah Ahmad Shuaib Usman Ilyas Fozia Bibi Hafiz Muhammad Rafique Nanotechnologies Research Centre Department of PhysicsUniversity of Engineering and Technology Under Graduate Block/School of Physical Sciences University of the Punjab Department of Physics University of the Punjab

Graphene has become a worldwide admired material among researchers and scientists equally due to its unique richness in mechanical strength, electrical conductivity, optical and thermal properties. Re- searchers have explored that the composite materials based on graphene and metal/metal oxide nanostructures possess excellent potential for energy storage technologies. In particular, supercapacitors based on such composite materials have engrossed the extreme interest of researchers for its rapid charging/discharging time, safe operation and longer cyclic constancy. Till now, several fabrication techniques for composite materials and their energy storage applications have been explored. Here, specially, we have concentrated on the hottest research progress for the fabrication of graphene oxide and metal/metal oxide nanocomposites. We also emphasized on the characteristics and properties of supercapacitors fabricated using these composite materials. Moreover, our study is focused on the specific capacitance and cyclic stability of various composites to haul out the most efficient material for supercapacitor applications.

关键词： GrapheneMetal/metal oxide nanostructureSupercapacitor

Parametric study and effect of calcination and carbonation conditions on the CO_2 capture performance of lithium orthosilicate sorbent

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Chinese Journal of Chemical Engineering 2018年第3期26卷 631-641页

作者： Nurul Azrin Zubbri abdul Rahman Mohamed Maedeh Mohammadi Low Carbon Economy (LCE) Research Group School of Chemical Engineering Engineering Campus Universiti Sains Malaysia Faculty of Chemical Engineering Babol Noushirvani University of Technology

The world is currently facing the challenges of global warming and climate change. Numerous efforts have been taken to mitigate CO2 emission, among which is the use of solid sorbents for CO2 capture. In this work, Li4SiO4 was synthesised via a sol-gel method using lithium nitrate （LiNO3） and tetraethylorthosilicate （SiC8H20O4） as precursors. A parametric study of Li：Si molar ratio （1-5）, calcination temperature （600-800℃） and calcination time （1-8 h） were conducted during sorbent synthesis. Calcination temperature （700-800℃） and carbonation temperature （500-700℃） during CO2 sorption activity were also varied to confirm the optimum operating temperature. Sorbent with the highest CO2 sorption capacity was finally introduced to several cyclic tests to study the durability of the sorbent through 10 cycles of CO2 sorption-desorption test. The results showed that the calcination temperature of 800℃ and carbonation temperature of 700℃ were the best operating temperatures, with CO2 sorption capacity of 7.95 mmol CO2·（g sorbent）^-1 （93% of the theoretical yield）. Throughout the ten cyclic processes, CO2 sorption capacity of the sorbent had dropped approximately 16.2% from the first to the tenth cycle, which was a reasonable decline. Thus, it was concluded that Li4SiO4 is a potential CO2 solid sorbent for high temperature CO2 capture activity.

关键词： CO2 capture Adsorption Carbon dioxide Lithium orthosilicate Sol-gel Sorption-desorption