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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

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

Modelling and analysis of parameters of vacuum tube solar collector with U-shaped tube for different climates

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Clean Energy 2023年第3期7卷 519-531页

作者： ghassan fadhil smaisim Azher M.Abed Salema K.Hadrawi farnaz Jahanbin Department of Mechanical Engineering Faculty of EngineeringUniversity of Kufa54001Iraq Nanotechnology and Advanced Materials Research Unit(NAMRU) Faculty of EngineeringUniversity of Kufa54001Iraq Department of Air Conditioning and Refrigeration Al-Mustaqbal University CollegeBabylon51001Iraq Refrigeration and Air-conditioning Technical Engineering Department College of Technical EngineeringThe Islamic UniversityNajaf54001Iraq Department of Chemistry Mashhad BranchIslamic Azad UniversityMashhadIran

In this study,based on the energy balance for different components of a double-layered vacuum-tube solar collector with a U-tube,the thermal performance of the collector unit is investigated separately using an analytical and quasi-dynamic *** model used in this study determines the temperature distribution in longitudinal and radial *** this research,the effects of physical parameters and heat transfer including the size of the collector,thermal-loss coefficient,absorption coefficient,mass flow and thermal resistance of the air layer under different climate conditions have been evaluated on the performance of the vacuum-tube *** results showed that by increasing the diameter of the tube with constant length,the annual thermal efficiency of the collector ***,in a fixed-diameter tube,with increasing tube length,the annual efficiency increases,but this increase is meagre for lengths of>1.5 *** optimal mass flow rate for maximum efficiency has been obtained for cities with different *** to the results,the optimal flow for different climates has different values that can be optimized as a relationship between the average solar radiation annually as a symbol of temperature and flow.

关键词： solar-thermal energy solar radiation vacuum tube dynamic simulation 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