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Clean Energy 2023年第3期7卷 571-581页

作者： Ghassan F.Smaisim Azher M.Abed ali shamel Department of Mechanical Engineering Faculty of EngineeringUniversity of KufaKufa54001Iraq Nanotechnology and Advanced Materials Research Unit(NAMRU) Faculty of EngineeringUniversity of KufaKufa54001Iraq Air Conditioning and Refrigeration Techniques Engineering Department Al-Mustaqbal University CollegeBabylon51001Iraq Department of Chemistry Ardebil BranchIslamic Azad UniversityArdebilIran

To use energy systems based on renewable sources,it is very important to consider backup and hybrid sources because renewable energies are not available all the time;therefore,in this system,a geothermal pump is used to preheat the fluid,then the heated fluid is sent to the vacuum tube collector to reach a higher temperature by absorbing solar-thermal energy,and after absorbing solar energy,it goes to the evaporator to produce superheated steam and finally the superheated fluid moves to the steam turbine to produce *** the simulation,thermodynamic analysis along with economic analysis has been *** the base state,the energy efficiency and exergy of cogeneration were 0.566 and 0.156,respectively;the energy efficiency and electrical exergy were better than 0.057 and 0.065;and the overall output and immutable work values were 50 and 671.1 kW,respectively.

关键词： exergoeconomic analysis CHP cycle organic Rankine cycle vacuum tube collector sustainable development

Parametric investigation of thermal behaviour of salt-gradient solar pool for climatic conditions

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Clean Energy 2022年第5期6卷 693-704页

作者： Ghassan Fadhil Smaisim Azher M.Abed Salema K.Hadrawi ali shamel Department of Mechanical Engineering Faculty of EngineeringUniversity of KufaIraq Nanotechnology and Advanced Materials Research Unit(NAMRU) Faculty of EngineeringUniversity of KufaIraq Air Conditioning and Refrigeration Techniques Engineering Department Al-Mustaqbal University CollegeBabylon51001Iraq Refrigeration and Air-conditioning Technical Engineering Department College of Technical EngineeringThe Islamic UniversityNajaf54001Iraq Computer Engineering Department Imam Reza UniversityMashhadIran Department of Chemistry Ardebil BranchIslamic Azad UniversityArdebilIran

The use of solar energy is highly welcomed due to its availability *** the types of solar energy technologies,the use of this type of energy to produce heat from different aspects is much more common,so in this research we have tried to examine different aspects of producing thermal energy from solar energy to supply the heat required by the *** this purpose,numerical modelling of the solar pool has been done by considering the heat-transfer characteristics and validation has been done to ensure the obtained *** this paper,according to the physical realities facing solar systems in two scenarios,an analysis with shadow and without shadow has been *** of the important results is that as the surface of the pool increases,the amount of heat absorption by the pool fluid will increase,but the effect of the shadow will decrease.

关键词： solar energy solar pool numerical modelling experimental study thermal performance

Thermo-economic analysis of the performance of the combined system with evacuated tube collectors

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Clean Energy 2023年第2期7卷 242-252页

作者： Ghassan Fadhil Smaisim Salema K.Hadrawi Azher M.Abed Hasan Sh.Majdi ali shamel Department of Mechanical Engineering Faculty of EngineeringUniversity of Kufa54001Iraq Nanotechnology and Advanced Materials Research Unit(NAMRU) Faculty of EngineeringUniversity of Kufa54001Iraq Refrigeration and Air-conditioning Technical Engineering Department College of Technical EngineeringThe Islamic UniversityNajaf54001Iraq Computer Engineering Department Imam Reza UniversityMashhadIran Department of Air Conditioning and Refrigeration Al-Mustaqbal University CollegeBabylon51001Iraq Department of Chemical Engineering and Petroleum Industries Al-Mustaqbal University CollegeBabylon51001Iraq Department of Chemistry Ardebil BranchIslamic Azad UniversityArdebilIran

Using combined cooling,heat and power systems can be an appropriate substitute for preventing emissions of pollutants and excessive consumption of fossil *** renewable energy in these systems as a source of power generation can be an appropriate substitute for fossil-fuel-based ***,in this paper,cogeneration cooling,heat and power systems based on gas-fired internal combustion engines with a solar-thermal system with evacuated tube collectors have been modelled and thermo-economic analysis has been done to compare fossil-fuel-based *** required rate of heat to supply the hot water is 50 *** the studied system,the internal combustion engine produces electrical ***,the solar-thermal system with evacuated tube collectors and the gas-burning generator provide the thermal energy required by the studied building and the primary stimulus of the absorption chiller for *** this study,two different scenarios are conducted in states considering simultaneous production systems and regardless of this environmental and thermo-economic analysis *** results showed that the efficiency of the studied system was 60% in summer and 56% in winter.

关键词： combined cooling,heat and power thermo-economic analysis evacuated tube collectors environmental analysis solar-thermal energy

Modelling and optimization of combined heat and power system in microgrid based on renewable energy

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Clean Energy 2023年第4期7卷 735-746页

作者： Ghassan F.Smaisim Azher M.Abed Salema K.Hadrawi Hasan Sh.Majdi ali shamel Department of Mechanical Engineering Faculty of EngineeringUniversity of Kufa54001Iraq Nanotechnology and Advanced Materials Research Unit(NAMRU) Faculty of EngineeringUniversity of Kufa54001Iraq Air Conditioning and Refrigeration Techniques Engineering Department Al-Mustaqbal University CollegeBabylon51001Iraq Refrigeration and Air-conditioning Technical Engineering Department College of Technical EngineeringThe Islamic UniversityNajafIraq Department of Chemical Engineering and Petroleum Industries Al-Mustaqbal University CollegeBabylon 51001Iraq Department of Chemistry Ardebil BranchIslamic Azad UniversityArdebilIran

Due to the short distance between the sources of production and consumption,microgrids(MGs)have received considerable attention because these systems involve fewer losses and waste less *** another advantage of MGs is that renewable energy sources can be widely used because these resources are not fully available and can provide a part of the required *** purpose of this research is to model the MG considering the production sources of microturbines,gas turbines and internal combustion *** energies such as wind turbines(WTs)and photovoltaic(PV)cells have been used to provide part of the required power and,because of the lack of access to renewable energy sources at all times,energy reserves such as batteries and fuel cells(FCs)have been *** power of the microturbine,gas turbine,internal combustion engine,FC and battery in this system is 162,150,90,100 and 225 kW,*** modelling the studied system,optimization was done using the imperialist competitive algorithm to minimize production costs and provide maximum thermal and electrical *** maximum production power for PVs is equal to 0.6860 MWh and at this time this value for WTs is equal to 0.3812 MWh,in which case the excess electricity produced will be sold to the grid.

关键词： microgrid energy management system optimization optimal power flow combined heat and power sustainable development

Improving the transition capability of the low-voltage wind turbine in the sub-synchronous state using a fuzzy controller

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Clean Energy 2022年第4期6卷 682-692页

作者： Ngakan Ketut Acwin Dwijendra Abduladheem Turki Jalil Azher MAbed Bashar SBashar Ahmed Kateb Jumaah Al-Nussairi ali Thaeer Hammid ali shamel Khusniddin Fakhriddinovich Uktamov Faculty of Engineering Udayana UniversityBaliIndonesia80361 Faculty of Biology and Ecology Yanka Kupala State University of Grodno230023 GrodnoBelarus College of Technical Engineering The Islamic UniversityNajafIraq Department of Air Conditioning and Refrigeration Al-Mustaqbal University CollegeBabylonIraq Al-Nisour University College BaghdadIraq Al-Manara College for Medical Sciences MaysanIraq Computer Engineering Techniques Faculty of Information TechnologyImam Ja’afar Al-Sadiq UniversityBaghdadIraq Department of Chemistry Ardebil BranchIslamic Azad UniversityArdebilIran ‘Economic Security’Department Tashkent State University of EconomicsTashkent CityUzbekistan

The main problem of wind turbines is associated with induction generators in their power supply during short circuits in the *** this research,a new method is presented for the uninterrupted operation of a wind turbine equipped with an induction generator fed on both sides of feeding during network *** farms equipped with a doubly-fed induction generator(DFIG)require two abilities to allow system operators to increase *** capabilities include fault ride-through and synchronization of output force fluctuations,especially when these generators generate significant electrical power.A MATLAB®software environment has been used to evaluate and improve the performance of these turbines.A fuzzy complement(FC)controller is used to improve the performance of the *** results demonstrate that this controller limits the operation of the turbine current and voltage in the short-circuit mode *** results obtained from comparing two different modes,it can be said that ripple is 4%in the FC mode,while this parameter is equal to 10%for the proportional-integral controller.

关键词： wind turbine sub-synchronous performance fuzzy controller MATLAB

Genuine entanglement under squeezed generalized amplitude damping channels with memory

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Chinese Physics B 2024年第2期33卷 158-163页

作者： Mazhar ali Department of Electrical Engineering Faculty of EngineeringIslamic University MadinahMadinah 107Saudi Arabia

We study genuine entanglement among three qubits undergoing a noisy process that includes dissipation, squeezing,and decoherence. We obtain a general solution and analyze the asymptotic quantum states. We find that most of these asymptotic states can be genuinely entangled depending upon the parameters of the channel, memory parameter, and the parameters of the initial states. We study Greenberger–Horne–Zeilinger(GHZ) states and W states, mixed with white noise,and determine the conditions for them to be genuinely entangled at infinity. We find that for these mixtures, it is possible to start with a bi-separable state(with a specific mixture of white noise) and end with genuine entangled states. However, the memory parameter μ must be very high. We find that in contrast to the two-qubit case, none of the three-qubit asymptotic states for n → ∞ are genuinely entangled.

关键词： genuine entanglement squeezed thermal baths multipartite states

Heat transfer analysis in particle-laden flows using the immersed boundary method

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Particuology 2024年第7期90卷 394-403页

作者： ali Abbas Zaidi Department of Mechanical Engineering University of Manitoba75A Chancellors CircleWinnipegR3T 5V6Canada

This paper investigates an efficient immersed boundary method(IBM)for multiple-core CPU machines with local grid refinement for the calculation of heat transfer between fluids and finite-sized *** fluid momentum equations are solved by using the fractional step method,while the energy equation is solved by employing the second-order Adams-Bashforth *** efficient load balancing between the CPU cores,the coupling between particles and fluid is obtained by applying the body force in the fluid equations,which depends on the solid volume fraction of particles contained in each grid cell,and then by linearly interpolating the particle temperature and velocity on the fluid grid cell(in place of the delta function commonly used in literature).Several test cases from the literature are studied,and good agreement is observed between the simulation results and the ***,a scaling study on multiple core machines is performed,demonstrating the proposed IBM's capabilities for a significant reduction in processing time.

关键词： Heat transfer Immersed boundary method Particle resolved direct numerical simulations Fluid solid interactions

Simulation of the deformable lateral boundaries in biaxial test using DEM

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Particuology 2024年第5期88卷 161-175页

作者： ali Momeni Barry Clarke Yong Sheng ali Hassanpour WSP 3 Wellington PlaceLeedsLS1 4APUK Hull University HullHU6 7RXUK School of Civil Engineering University of LeedsLeedsLS2 9JTUK School of Computer Science University of HullHullHU6 7RXUK School of Chemical and Process Engineering University of LeedsLeedsLS2 9JTUK

Applying the discrete element method(DEM)in soil mechanics can provide abundant information at the particle-scale and facilitates illustration of the macro-mechanical behaviour of soils based on the inter-particle *** triaxial test is one of the most common laboratory methods to study the macro-mechanical behaviour of particulate materials such as ***,many problems in geotechnical design can be assumed and simplified as a plane strain *** a biaxial test can be conducted to reproduce the macro-mechanical behaviour of soil,where the sample is enclosed by two horizontal rigid platens and a vertical latex membrane,which is a deformable continuous element and allows the enclosed specimen to deform freely while maintaining confining stress during *** paper presents an algorithm to represent physical and mechanical characteristics of latex membrane in the 2D DEM simulation of biaxial test using the PFC^(2D) *** investigate the impact of the lateral boundary conditions on the micro-macro mechanical behaviours of soil samples,two sets of DEM biaxial tests are conducted,*** rigid and deformable lateral boundary *** DEM modeling results indicate that the lateral boundary conditions have a significant effect on the micro-scale fabric properties,thickness and inclination of the shear *** comparison between these two simulations also demonstrates that the lateral boundary conditions play a major role in the peak and post-peak stress-strain behaviours as well as the dilation and critical state behaviours of granular soils.

关键词： Discrete element method Biaxial test Deformable boundaries Shear band Critical state Fabric anisotropy Geometrical stability index

Sensing the heavy water concentration in an H_(2)O-D_(2)O mixture by solid-solid phononic crystals

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Chinese Physics B 2024年第4期33卷 493-498页

作者： Mohammadreza Rahimi ali Bahrami Optoelectronic and Nanophotonics Research Laboratory(ONRL) Faculty of Electrical EngineeringSahand University of TechnologyTabrizIran

A new method based on phononic crystals is presented to detect the concentration of heavy water(D_(2)O)in an H_(2)O-D_(2)O *** have been obtained and analyzed in the concentration range of 0%-10%and 90%-100%D_(2)O.A proposed structure of tungsten scatterers in an aluminum host is *** order to detect the target material,a cavity region is considered as a sound wave resonator in which the target material with different concentrations of D_(2)O is *** changing the concentration of D_(2)O in the H_(2)O-D_(2)O mixture,the resonance frequency undergoes a frequency *** 1%change in D_(2)O concentration in the H_(2)O-D_(2)O mixture causes a frequency change of about 120 *** finite element method is used as the numerical method to calculate and analyze the natural frequencies and transmission spectra of the proposed *** performance evaluation index shows a high Q factor up to 1475758 and a high sensitivity up to 13075,which are acceptable values for sensing *** other figures of merit related to the detection performance also indicate high-quality performance of the designed sensor.

关键词： phononic crystals sensor H_(2)O-D_(2)O mixture cavity

Note on Lower Triassic Gondolelloid Conodont Rediversifications with Emphasis on the Spathian Recovery

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Journal of Earth Science 2024年第4期35卷 1236-1242页

作者： ali Murat Kilic Department of Geological Engineering Faculty of EngineeringBalikesir UniversityBalikesir99100Turkey

Conodonts,as a biotic group,next to ammonoids,pollen and spores,crustaceans and vertebrates,provide proxy clues for environment and age assessments of the rocks in which they *** are widely used for Triassic marine ***,there are various discussions about their multielement taxonomy and evolutionary lineages(e.g.,generation,speciation).Although first studies reported that most Triassic conodont species were unimembrate,studies carried out in the following years maintained that all Triassic conodonts were *** statistical reconstructions of a number of Triassic apparatuses were attempted,the discovery of fused clusters and natural assemblages has subsequently demonstrated that Triassic conodonts are indeed multimembrate,and all of the elements exist together in the same *** present paper aims to clarify the evolutionary relationship and array of some Lower Triassic *** dagisi *** described.

关键词： Triassic Spathian conodont Columbitella Siberia environmental geology