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This research paper presents the case study results on generating electricity based on solar resources for an existing residential building with conventional electric energy demand located in Cluj-Napoca, Romania. The solar energy system proposed for analysis has provided the back-up energy through two types of state-of-the-art energy storage technologies: (a) Tesla batteries and (b) hydrogen vector energy, obtained electrolytically on-site. Starting from the main imposed condition that all the building's electric energy demand be provided by the solar resource, sustainable technical solutions for renewable energy storage are of crucial importance for the successful implementation of power systems based on clean solar energy. New solar energy storage technologies are imperative for the superior harnessing of solar resources at the production site, whether it is short-term energy storage such as Tesla batteries or long-term energy storage such as hydrogen energy vector. The main objective of this work is to assess the feasibility of the proposed grid-independent energy system, which is pairing solar power to sustainable energy storage technologies within an existing residential building with conventional electric energy demand. This study aims to evaluate the optimal sizing of the solar units implemented in the design along with the optimal back-up energy storage capacities to fulfil the building's daily electricity demand in an uninterrupted mode. This article investigates the possibility of supplying 100% solar power to the existing residential building with conventional electric energy demand under constraints and limitations conditions due to the stochastic nature of building electricity consumption, volatile and intermittent nature of solar resources, local meteorological conditions specific to the building's placement and space limitations for the positioning of the photovoltaic panels. The average daily load that has been calculated for the building has a value of 6.50 kWh. To reach the proposed target of integral solar power supply, photovoltaic panels with an installed power of 7.84 kWp paired with a Tesla batteries bank with a storage capacity of 7.4 kWh are needed, and in the case of storing solar energy in the form of electrolytic hydrogen it is necessary to pair the photovoltaic panels with an installed power of 15.12 kWp, 3 kW electrolyser, 2 kW fuel cell and H2 tank of 7 kg. The annual energy demand of 2369 kWh is achieved of 43.27% directly from photovoltaic panels and 56.73% through the back-up energy in case of pairing the batteries as an energy storage medium, and in case of pairing hydrogen as an energy vector, 41.53% is powered directly by photovoltaic panels and 58.46% comes from the energy reserve stored through hydrogen technologies. The environmental analysis highlights an average decrease of up to 85% in carbon dioxide emissions generated by the implementation of clean energy systems analysed compared to the grid electricity. Also, the results of this study show that the investment costs in photovoltaic panels and storage systems are still high, limiting their use in residential buildings, but we are witnessing technological developments to improve the performance and durability of these electricity storage solutions at low costs, which will allow them to be marketed on a large scale, particularly widespread for residential applications.
Ioan Așchilean; Nicoleta Cobîrzan; Andrei Bolboaca; Radu Boieru; Raluca‐Andreea Felseghi. Pairing solar power to sustainable energy storage solutions within a residential building: A case study. International Journal of Energy Research 2021, 1 .
AMA StyleIoan Așchilean, Nicoleta Cobîrzan, Andrei Bolboaca, Radu Boieru, Raluca‐Andreea Felseghi. Pairing solar power to sustainable energy storage solutions within a residential building: A case study. International Journal of Energy Research. 2021; ():1.
Chicago/Turabian StyleIoan Așchilean; Nicoleta Cobîrzan; Andrei Bolboaca; Radu Boieru; Raluca‐Andreea Felseghi. 2021. "Pairing solar power to sustainable energy storage solutions within a residential building: A case study." International Journal of Energy Research , no. : 1.
Alternative energy resources have a significant function in the performance and decarbonization of power engendering schemes in the building application domain. Additionally, “green buildings” play a special role in reducing energy consumption and minimizing CO2 emissions in the building sector. This research article analyzes the performance of alternative primary energy sources (sun and hydrogen) integrated into a hybrid photovoltaic panel/fuel cell system, and their optimal synergy to provide green energy for a green building. The study addresses the future hydrogen-based economy, which involves the supply of hydrogen as the fuel needed to provide fuel cell energy through a power distribution infrastructure. The objective of this research is to use fuel cells in this field and to investigate their use as a green building energy supply through a hybrid electricity generation system, which also uses photovoltaic panels to convert solar energy. The fuel cell hydrogen is supplied through a distribution network in which hydrogen production is outsourced and independent of the power generation system. The case study creates virtual operating conditions for this type of hybrid energy system and simulates its operation over a one-year period. The goal is to demonstrate the role and utility of fuel cells in virtual conditions by analyzing energy and economic performance indicators, as well as carbon dioxide emissions. The case study analyzes the optimal synergy between photovoltaic panels and fuel cells for the power supply of a green building. In the simulation, an optimally configured hybrid system supplies 100% of the energy to the green building while generating carbon dioxide emissions equal to 11.72% of the average value calculated for a conventional energy system providing similar energy to a standard residential building. Photovoltaic panels account for 32% of the required annual electricity production, and the fuel cells generate 68% of the total annual energy output of the system.
Raluca-Andreea Felseghi; Ioan Așchilean; Nicoleta Cobîrzan; Andrei Bolboacă; Maria Raboaca. Optimal Synergy between Photovoltaic Panels and Hydrogen Fuel Cells for Green Power Supply of a Green Building—A Case Study. Sustainability 2021, 13, 6304 .
AMA StyleRaluca-Andreea Felseghi, Ioan Așchilean, Nicoleta Cobîrzan, Andrei Bolboacă, Maria Raboaca. Optimal Synergy between Photovoltaic Panels and Hydrogen Fuel Cells for Green Power Supply of a Green Building—A Case Study. Sustainability. 2021; 13 (11):6304.
Chicago/Turabian StyleRaluca-Andreea Felseghi; Ioan Așchilean; Nicoleta Cobîrzan; Andrei Bolboacă; Maria Raboaca. 2021. "Optimal Synergy between Photovoltaic Panels and Hydrogen Fuel Cells for Green Power Supply of a Green Building—A Case Study." Sustainability 13, no. 11: 6304.
This article presents the experimental results obtained by the testing an experimental model of water distribution which is flexible and above-head mounted on a seismic platform, and their validation in a theoretical manner, but also by the Finite Element Method, using the ANSYS simulation program. This type of system shown by the experimental model is desired to be used in practice not only in seismic areas, but also in the areas of heavy road transport, landslides, etc. thorugh the use thereof in the most stressed points of the network (hearth entry/exit, before/after an elbow, etc.) but also on long routes, at optimal distances. The results achieved are related to glass- reinforced plastic (GRP) pipes with a nominal diameter DN = 250 mm, but conclusions may be drawn starting from these to help future research where the mass of the earth is desired to be taken into account. The present results are comprehensive for buried pipes operated dynamically or seismically at low-medium intensity, as this type of earthquake occurs more and more often in Europe. The experimental tests in this article do not have the characteristics necessary for a high intensity seismic action (above 5° Richter).
Ana Ancaș; Ioan Așchilean; Mihai Profire; Florin Țurcanu; Raluca-Andreea Felseghi. Experimental Study on the Behaviour of Seismic Actions on a Flexible Glass-Reinforced Plastic Structure Used in Water Transport Pipes. Materials 2021, 14, 2878 .
AMA StyleAna Ancaș, Ioan Așchilean, Mihai Profire, Florin Țurcanu, Raluca-Andreea Felseghi. Experimental Study on the Behaviour of Seismic Actions on a Flexible Glass-Reinforced Plastic Structure Used in Water Transport Pipes. Materials. 2021; 14 (11):2878.
Chicago/Turabian StyleAna Ancaș; Ioan Așchilean; Mihai Profire; Florin Țurcanu; Raluca-Andreea Felseghi. 2021. "Experimental Study on the Behaviour of Seismic Actions on a Flexible Glass-Reinforced Plastic Structure Used in Water Transport Pipes." Materials 14, no. 11: 2878.
Today, hydrogen is recognized as a non-polluting energy carrier because it does not contribute to global warming if it is produced from renewable energy resources. Hydrogen is the only secondary energy carrier that is suitable for wide application. At the center of attention is the fact that hydrogen can be obtained from a wide range of primary energies. It can be used advantageously for a wide range of applications. Hydrogen can be used in decentralized systems without emitting CO2. Hydrogen is already a part of today's chemical industry, but as an energy resource, its rare benefits can only be achieved through fuel cell technology. The next generations of energy systems for stationary applications based on hydrogen fuel cell have the potential of using and implementing clean energy in the residential buildings sector, as well as in the tertiary and industrial sector, thus having a significant impact on greenhouse gas emissions decreasing, specific characteristics of hydrogen technology having an important role in the decarbonization of energy production systems.
Gheorghe Badea; Raluca-Andreea Felseghi; Ioan Așchilean. Hydrogen-Energy Vector Within a Sustainable Energy System for Stationary Applications. Advances in Computer and Electrical Engineering 2021, 1 -21.
AMA StyleGheorghe Badea, Raluca-Andreea Felseghi, Ioan Așchilean. Hydrogen-Energy Vector Within a Sustainable Energy System for Stationary Applications. Advances in Computer and Electrical Engineering. 2021; ():1-21.
Chicago/Turabian StyleGheorghe Badea; Raluca-Andreea Felseghi; Ioan Așchilean. 2021. "Hydrogen-Energy Vector Within a Sustainable Energy System for Stationary Applications." Advances in Computer and Electrical Engineering , no. : 1-21.
The Electric Vehicle (EV) as a clean alternative to Classic Vehicle that use fossil fuels is promoted as an immediate solution to improve the quality parameters of the environment related to the transport sector. The transition to clean electrified mobility must be considered from the sustainability spectrum, and the planning of a strategy related to the implementation of electric vehicles implies, from the beginning, providing clean energy conditions to go toward a green‐to‐green paradigm. It should be noted that the successful implementation of the “green electro mobility” concept depends heavily on the green energy supply solutions of green electric vehicle, so Electric Vehicle Charging Stations (EV‐CS) should be powered by electricity generation systems based on green resources. This research article has as main objective the environmental impact assessment from the perspective of CO2 emissions embedded in green stand‐alone energy systems and the estimation of the environmental benefits of their implementation in the power supply of EV‐CS from the perspective of avoided CO2 emissions compared to the classic electricity supply grid. The results indicate that the green energy systems represent feasible solutions for the independent energy support of electric vehicle charging stations, being able to supply electricity based on on‐site available 100% alternative energy sources. Related to 1 kWh of electricity, the CO2 emissions embedded in these systems represent on average 11.40% of the CO2 emissions of the electricity supplied through the grid at European level and on average 7.10% of the CO2 emissions of the electricity supplied through the grid worldwide. Results also show that the average price of 1kWh of electricity generated by the analyzed systems is 4.3 times higher than the average unit price of the European Union grid energy, but this indicator must be correlated with the kgCO2/kWh cost savings compared to the electricity production from classic power plants.
Constantin Filote; Raluca‐Andreea Felseghi; Maria Simona Raboaca; Ioan Aşchilean. Environmental impact assessment of green energy systems for power supply of electric vehicle charging station. International Journal of Energy Research 2020, 44, 10471 -10494.
AMA StyleConstantin Filote, Raluca‐Andreea Felseghi, Maria Simona Raboaca, Ioan Aşchilean. Environmental impact assessment of green energy systems for power supply of electric vehicle charging station. International Journal of Energy Research. 2020; 44 (13):10471-10494.
Chicago/Turabian StyleConstantin Filote; Raluca‐Andreea Felseghi; Maria Simona Raboaca; Ioan Aşchilean. 2020. "Environmental impact assessment of green energy systems for power supply of electric vehicle charging station." International Journal of Energy Research 44, no. 13: 10471-10494.
In the present study, the sorption behavior of iron (Fe) and manganese (Mn) from a binary metal solution system onto thermally activated natural zeolite was studied. Batch adsorption experiments were carried out to investigate the effects of zeolite quantity, particle size, and activation temperature. Equilibrium studies were carried out to evaluate the adsorption capacity of the thermally activated natural zeolite. The obtained results showed that the thermally activated natural zeolite favored the removal of Fe over Mn, due to competition between them. Elemental analysis of the activated zeolite samples obtained by energy-dispersive X-ray analysis (EDX) indicated a Si/Al ratio >4, which is specific for clinoptilolite-type zeolite. The removal of Fe and Mn was best described by the Langmuir model, indicating the formation of a monolayer on the surface of the activated natural zeolite. The kinetic results revealed that the experimental data were best fitted by the pseudo-second-order model for both metals. The results suggest that a new natural zeolite from Rupea quarry, Brașov County, Romania could be used as a potential adsorbent for removal of Fe and Mn from binary metal solution systems, addressing the lack of information about this material from this region.
Emilia Neag; Anamaria Iulia Török; Claudiu Tanaselia; Ioan Aschilean; Marin Senila. Kinetics and Equilibrium Studies for the Removal of Mn and Fe from Binary Metal Solution Systems Using a Romanian Thermally Activated Natural Zeolite. Water 2020, 12, 1614 .
AMA StyleEmilia Neag, Anamaria Iulia Török, Claudiu Tanaselia, Ioan Aschilean, Marin Senila. Kinetics and Equilibrium Studies for the Removal of Mn and Fe from Binary Metal Solution Systems Using a Romanian Thermally Activated Natural Zeolite. Water. 2020; 12 (6):1614.
Chicago/Turabian StyleEmilia Neag; Anamaria Iulia Török; Claudiu Tanaselia; Ioan Aschilean; Marin Senila. 2020. "Kinetics and Equilibrium Studies for the Removal of Mn and Fe from Binary Metal Solution Systems Using a Romanian Thermally Activated Natural Zeolite." Water 12, no. 6: 1614.
The research conducted in this paper is directed towards a bibliometric review and a visualization analysis of the relationship between innovation and sustainability. The main objective is to empirically document the intellectual structure, the volume and the knowledge-development directions. For this objective, we used the VOS Viewer software and the scientific databases ISI Web of Science (WoS). We identify that there is a big increase in volume of articles on innovation and sustainability published in the last 10 years, from 2010 up to 2019, compared to the entire period before 2010. Given the large amount of the literature, we form an ample database of 436 peer-reviewed articles published in the last 10 years. The bibliometric analysis reveals the most influential journals, authors and papers in the studied field. This research reveals that by combining the main aspects of innovation and sustainability in a single concept like “sustainable innovation”, an emerging topic can appear, and it can offer new research directions in the very big field of innovation and in the new and actual field of sustainability.
Dorin Maier; Andreea Maier; Ioan Așchilean; Livia Anastasiu; Ovidiu Gavriș. The Relationship between Innovation and Sustainability: A Bibliometric Review of the Literature. Sustainability 2020, 12, 4083 .
AMA StyleDorin Maier, Andreea Maier, Ioan Așchilean, Livia Anastasiu, Ovidiu Gavriș. The Relationship between Innovation and Sustainability: A Bibliometric Review of the Literature. Sustainability. 2020; 12 (10):4083.
Chicago/Turabian StyleDorin Maier; Andreea Maier; Ioan Așchilean; Livia Anastasiu; Ovidiu Gavriș. 2020. "The Relationship between Innovation and Sustainability: A Bibliometric Review of the Literature." Sustainability 12, no. 10: 4083.
Seismic activity of small, medium or high intensity has a destructive effect on existing water supply and distribution networks. In the scholar literature, these are included in Class I—Vital Performance Systems, whose operation must be uninterrupted in case of a seismic event. Water networks are also essential for the safe operation of certain critical subsystems in the event of an earthquake (fire-extinguishing systems, etc.), in order to avoid loss of human lives, reduce adverse environmental impacts and limit damage caused by fires. The article proposes a seismic safety system for the water transport pipelines obtained by designing, executing and testing an experimental design, a system that can be used to increase the seismic resilience of the water supply and distribution network pipelines. The experimental data obtained were verified on the basis of the theoretical data available in the literature. The results of the research are particularly useful and can be proposed for use from the stage of designing new networks to providing expertise for existing networks, for establishing the most-stressed areas in which to be installed, and for implementing both execution and at the same time rehabilitation and upgrading.
Ana Diana Ancaş; Ioan Aşchilean; Mihai Profire; Ionut Ovidiu Toma. System for Increasing the Seismic Safety of Pipelines in the Water Supply and Distribution Networks. Water 2019, 11, 1049 .
AMA StyleAna Diana Ancaş, Ioan Aşchilean, Mihai Profire, Ionut Ovidiu Toma. System for Increasing the Seismic Safety of Pipelines in the Water Supply and Distribution Networks. Water. 2019; 11 (5):1049.
Chicago/Turabian StyleAna Diana Ancaş; Ioan Aşchilean; Mihai Profire; Ionut Ovidiu Toma. 2019. "System for Increasing the Seismic Safety of Pipelines in the Water Supply and Distribution Networks." Water 11, no. 5: 1049.
This article analyses the relation between the failures that occurred in the water supply network and the road traffic in the city of Cluj-Napoca in Romania. The calculations in this case study were made using the Autodesk Robot Structural Analysis Professional 2011 software. In the case study, the following types of pipes were analysed: steel, gray cast iron, ductile cast iron and high density polyethylene (HDPE). While in most studies only a few sections of pipelines, several types of pipelines and certain mounting depths have been analysed, the case study presented analyses the entire water supply system of a city with a population of 324,576 inhabitants, whose water supply system has a length of 479 km. The results of the research are useful in the design phase of water distribution networks, so depending on the type of pipe material, the minimum depth of installation can be indicated, so as to avoid the failure of the pipes due to road traffic. From this perspective, similar studies could also be carried out regarding the negative influence of road traffic on sewerage networks, gas networks and heating networks.
Ioan Așchilean; Mihai Iliescu; Nicolae Ciont; Ioan Giurca. The Unfavourable Impact of Street Traffic on Water Distribution Pipelines. Water 2018, 10, 1086 .
AMA StyleIoan Așchilean, Mihai Iliescu, Nicolae Ciont, Ioan Giurca. The Unfavourable Impact of Street Traffic on Water Distribution Pipelines. Water. 2018; 10 (8):1086.
Chicago/Turabian StyleIoan Așchilean; Mihai Iliescu; Nicolae Ciont; Ioan Giurca. 2018. "The Unfavourable Impact of Street Traffic on Water Distribution Pipelines." Water 10, no. 8: 1086.
Recent environmental and climate change issues make it imperative to persistently approach research into the development of technologies designed to ensure the sustainability of global mobility. At the European Union level, the transport sector is responsible for approximately 28% of greenhouse gas emissions, and 84% of them are associated with road transport. One of the most effective ways to enhance the de-carbonization process of the transport sector is through the promotion of electric propulsion, which involves overcoming barriers related to reduced driving autonomy and the long time required to recharge the batteries. This paper develops and implements a method meant to increase the autonomy and reduce the battery charging time of an electric car to comparable levels of an internal combustion engine vehicle. By doing so, the cost of such vehicles is the only remaining significant barrier in the way of a mass spread of electric propulsion. The chosen method is to hybridize the electric powertrain by using an additional source of fuel; hydrogen gas stored in pressurized cylinders is converted, in situ, into electrical energy by means of a proton exchange membrane fuel cell. The power generated on board can then be used, under the command of a dedicated management system, for battery charging, leading to an increase in the vehicle’s autonomy. Modeling and simulation results served to easily adjust the size of the fuel cell hybrid electric powertrain. After optimization, an actual fuel cell was built and implemented on a vehicle that used the body of a Jeep Wrangler, from which the thermal engine, associated subassemblies, and gearbox were removed. Once completed, the vehicle was tested in traffic conditions and its functional performance was established.
Ioan Aschilean; Mihai Varlam; Mihai Culcer; Mariana Iliescu; Mircea Raceanu; Adrian Enache; Maria Simona Raboaca; Gabriel Rasoi; Constantin Filote. Hybrid Electric Powertrain with Fuel Cells for a Series Vehicle. Energies 2018, 11, 1294 .
AMA StyleIoan Aschilean, Mihai Varlam, Mihai Culcer, Mariana Iliescu, Mircea Raceanu, Adrian Enache, Maria Simona Raboaca, Gabriel Rasoi, Constantin Filote. Hybrid Electric Powertrain with Fuel Cells for a Series Vehicle. Energies. 2018; 11 (5):1294.
Chicago/Turabian StyleIoan Aschilean; Mihai Varlam; Mihai Culcer; Mariana Iliescu; Mircea Raceanu; Adrian Enache; Maria Simona Raboaca; Gabriel Rasoi; Constantin Filote. 2018. "Hybrid Electric Powertrain with Fuel Cells for a Series Vehicle." Energies 11, no. 5: 1294.
Bio-organic greenhouses that are based on alternative resources for producing heat and electricity stand out as an efficient option for the sustainable development of agriculture, thus ensuring good growth and development of plants in all seasons, especially during the cold season. Greenhouses can be used with maximum efficiency in various agricultural lands, providing ideal conditions of temperature and humidity for short-term plant growing, thereby increasing the local production of fruit and vegetables. This paper presents the development of a durable greenhouse concept that is based on complex energy system integrating fuel cells and solar panels. Approaching this innovative concept encountered a major problem in terms of local implementation of this type of greenhouses because of the difficulty in providing electrical and thermal energy from conventional sources to ensure an optimal climate for plant growing. The project result consists in the design and implementation of a sustainable greenhouse energy system that is based on fuel cells and solar panels.
Ioan Aschilean; Gabriel Rasoi; Maria Simona Raboaca; Constantin Filote; Mihai Culcer. Design and Concept of an Energy System Based on Renewable Sources for Greenhouse Sustainable Agriculture. Energies 2018, 11, 1201 .
AMA StyleIoan Aschilean, Gabriel Rasoi, Maria Simona Raboaca, Constantin Filote, Mihai Culcer. Design and Concept of an Energy System Based on Renewable Sources for Greenhouse Sustainable Agriculture. Energies. 2018; 11 (5):1201.
Chicago/Turabian StyleIoan Aschilean; Gabriel Rasoi; Maria Simona Raboaca; Constantin Filote; Mihai Culcer. 2018. "Design and Concept of an Energy System Based on Renewable Sources for Greenhouse Sustainable Agriculture." Energies 11, no. 5: 1201.
One of the major challenges faced by water companies around the world is the high level of water losses in distribution networks. This research paper presents a case study on the choice of the best technical solution for the rehabilitation of the water distribution network pipelines of Cluj-Napoca City, Romania. The analytical network process (ANP) method was used as the selection method, and calculations were performed using the Super Decisions 2.6.0 software. In the case study, five alternatives were analyzed based on seven criteria. The criteria taken into account in the decision-making included pipe diameter, pipe length, specific accomplishment duration, lifespan, pressure losses, price, and installation conditions, while the following methods were considered as rehabilitation alternatives: Compact Pipe, Slipline, Subline, Swagelining, and Pilot Pipe. Based on the highest global priority, we recommend choosing the Subline alternative as the method of rehabilitating water distribution pipes from asbestos cement pipes in the case of Cluj-Napoca City, Romania.
Ioan Așchilean; Ioan Giurca. Choosing a Water Distribution Pipe Rehabilitation Solution Using the Analytical Network Process Method. Water 2018, 10, 484 .
AMA StyleIoan Așchilean, Ioan Giurca. Choosing a Water Distribution Pipe Rehabilitation Solution Using the Analytical Network Process Method. Water. 2018; 10 (4):484.
Chicago/Turabian StyleIoan Așchilean; Ioan Giurca. 2018. "Choosing a Water Distribution Pipe Rehabilitation Solution Using the Analytical Network Process Method." Water 10, no. 4: 484.
Ioan Aşchilean; Gheorghe Badea; Ioan Giurca; George Sebastian Naghiu; Florin George Iloaie. Choosing the Optimal Technology to Rehabilitate the Pipes in Water Distribution Systems Using the AHP Method. Energy Procedia 2017, 112, 19 -26.
AMA StyleIoan Aşchilean, Gheorghe Badea, Ioan Giurca, George Sebastian Naghiu, Florin George Iloaie. Choosing the Optimal Technology to Rehabilitate the Pipes in Water Distribution Systems Using the AHP Method. Energy Procedia. 2017; 112 ():19-26.
Chicago/Turabian StyleIoan Aşchilean; Gheorghe Badea; Ioan Giurca; George Sebastian Naghiu; Florin George Iloaie. 2017. "Choosing the Optimal Technology to Rehabilitate the Pipes in Water Distribution Systems Using the AHP Method." Energy Procedia 112, no. : 19-26.
Ioan Aschilean; Gheorghe Badea; Ioan Giurca; George Sebastian Naghiu; Florin George Iloaie. Determining Priorities Concerning Water Distribution Network Rehabilitation. Energy Procedia 2017, 112, 27 -34.
AMA StyleIoan Aschilean, Gheorghe Badea, Ioan Giurca, George Sebastian Naghiu, Florin George Iloaie. Determining Priorities Concerning Water Distribution Network Rehabilitation. Energy Procedia. 2017; 112 ():27-34.
Chicago/Turabian StyleIoan Aschilean; Gheorghe Badea; Ioan Giurca; George Sebastian Naghiu; Florin George Iloaie. 2017. "Determining Priorities Concerning Water Distribution Network Rehabilitation." Energy Procedia 112, no. : 27-34.
Ioan Giurca; Gheorghe Badea; Ioan Aşchilean; George Sebastian Naghiu; Emanuel Megyesi. Selecting the Number and Size of Boilers Used within the Heating Units of the Residential Complexes. Energy Procedia 2017, 112, 134 -141.
AMA StyleIoan Giurca, Gheorghe Badea, Ioan Aşchilean, George Sebastian Naghiu, Emanuel Megyesi. Selecting the Number and Size of Boilers Used within the Heating Units of the Residential Complexes. Energy Procedia. 2017; 112 ():134-141.
Chicago/Turabian StyleIoan Giurca; Gheorghe Badea; Ioan Aşchilean; George Sebastian Naghiu; Emanuel Megyesi. 2017. "Selecting the Number and Size of Boilers Used within the Heating Units of the Residential Complexes." Energy Procedia 112, no. : 134-141.
Gheorghe Badea; George Sebastian Naghiu; Ioan Giurca; Ioan Aschilean; Emanuel Megyesi. Hydrogen Production Using Solar Energy - Technical Analysis. Energy Procedia 2017, 112, 418 -425.
AMA StyleGheorghe Badea, George Sebastian Naghiu, Ioan Giurca, Ioan Aschilean, Emanuel Megyesi. Hydrogen Production Using Solar Energy - Technical Analysis. Energy Procedia. 2017; 112 ():418-425.
Chicago/Turabian StyleGheorghe Badea; George Sebastian Naghiu; Ioan Giurca; Ioan Aschilean; Emanuel Megyesi. 2017. "Hydrogen Production Using Solar Energy - Technical Analysis." Energy Procedia 112, no. : 418-425.
The concept of sustainable development aims to meet the needs of the present without compromising the needs of future generations. In achieving the desideratum “low-carbon energy system”, in the domain of energy production, the use of innovative low-carbon technologies providing maximum efficiency and minimum pollution is required. Such technology is the fuel cell; as these will be developed, it will become a reality to obtain the energy based on hydrogen. Thus, hydrogen produced by electrolysis of water using different forms of renewable resources becomes a secure and sustainable energy alternative. In this context, in the present paper, a comparative study of two different hybrid power generation systems for residential building placed in Cluj-Napoca was made. In these energy systems have been integrated renewable energies (photovoltaic panels and wind turbine), backup and storage system based on hydrogen (fuel cell, electrolyser and hydrogen storage tank), and, respectively, backup and storage system based on traditional technologies (diesel generator and battery). The software iHOGA was used to simulate the operating performance of the two hybrid systems. The aim of this study was to compare energy, environmental and economic performances of these two systems and to define possible future scenarios of competitiveness between traditional and new innovative technologies. After analyzing and comparing the results of simulations, it can be concluded that the fuel cells technology along with hydrogen, integrated in a hybrid system, may be the key to energy production systems with high energy efficiency, making possible an increased capitalization of renewable energy which have a low environmental impact.
G. Badea; R. A. Felseghi; I. Aschilean; S. M. Răboacă; T. Soimosan. The role of hydrogen as a future solution to energetic and environmental problems for residential buildings. 11TH INTERNATIONAL CONFERENCE OF PROCESSES IN ISOTOPES AND MOLECULES (PIM 2017) 2017, 1 .
AMA StyleG. Badea, R. A. Felseghi, I. Aschilean, S. M. Răboacă, T. Soimosan. The role of hydrogen as a future solution to energetic and environmental problems for residential buildings. 11TH INTERNATIONAL CONFERENCE OF PROCESSES IN ISOTOPES AND MOLECULES (PIM 2017). 2017; ():1.
Chicago/Turabian StyleG. Badea; R. A. Felseghi; I. Aschilean; S. M. Răboacă; T. Soimosan. 2017. "The role of hydrogen as a future solution to energetic and environmental problems for residential buildings." 11TH INTERNATIONAL CONFERENCE OF PROCESSES IN ISOTOPES AND MOLECULES (PIM 2017) , no. : 1.
For a good approach to new challenges recommended by EU Energy Performance of Buildings Directive, nearly Zero Energy Buildings (nZEB) concept for new residential buildings is conceived in order to drastically improving the overall performance of classical buildings, especially in terms of energy use, production and CO2 equivalent (CO2e) emissions. This paper shows the results of the case study where was investigated energy, economic and environmental performances of hybrid solar and wind system for neutral in terms of climate parameters nZEB. The aim of this study was to demonstrate the capability and feasibility of RES hybrid technology for the energy supply of Romanian nZEB, and also, was to establish new general criteria with the goal to determinate the optimal design solution and providing general principles for green energy production. The main results reveal that Romania has a potential for green energy to implement the new concept nZEB and the global technical optimum of a hybrid system for nZEB is determined by the optimal interaction between the design parameters. The hybrid solar and wind electric systems are functioned in operational stand alone mode, its are supplied 100% by energy from RES and embedded CO2 emissions are decreased by over 50% compared to the classics systems.
Gheorge Badea; Raluca - Andreea Felseghi; Simona Răboaca; Ioan Aşchilean; Andrei Bolboacă; Dan Mureşan; Emil Moldovan; Teodora Şoimoşan. Hybrid Solar and Wind Electric System for Romanian Nearly Zero Energy Buildings (nZEB) - Case Study. Applied Mechanics and Materials 2016, 841, 110 -115.
AMA StyleGheorge Badea, Raluca - Andreea Felseghi, Simona Răboaca, Ioan Aşchilean, Andrei Bolboacă, Dan Mureşan, Emil Moldovan, Teodora Şoimoşan. Hybrid Solar and Wind Electric System for Romanian Nearly Zero Energy Buildings (nZEB) - Case Study. Applied Mechanics and Materials. 2016; 841 ():110-115.
Chicago/Turabian StyleGheorge Badea; Raluca - Andreea Felseghi; Simona Răboaca; Ioan Aşchilean; Andrei Bolboacă; Dan Mureşan; Emil Moldovan; Teodora Şoimoşan. 2016. "Hybrid Solar and Wind Electric System for Romanian Nearly Zero Energy Buildings (nZEB) - Case Study." Applied Mechanics and Materials 841, no. : 110-115.
This article aims to describe a method regarding the selection of technical solutions for thermal and energy rehabilitation and modernization of buildings, for this purpose the TOPSIS method being used. In this article we also included a case study concerning the use of TOPSIS method in case of energy audit for buildings. The article concludes that TOPSIS may be used for energy audit projects for buildings. Based on the article's conclusions, we are making proposals in order to improve the actual legislation in the field of building energy audit.
Ioan Giurca; Ioan Aschilean; George Sebastian Naghiu; Gheorghe Badea. Selecting the Technical Solutions for Thermal and Energy Rehabilitation and Modernization of Buildings. Procedia Technology 2016, 22, 789 -796.
AMA StyleIoan Giurca, Ioan Aschilean, George Sebastian Naghiu, Gheorghe Badea. Selecting the Technical Solutions for Thermal and Energy Rehabilitation and Modernization of Buildings. Procedia Technology. 2016; 22 ():789-796.
Chicago/Turabian StyleIoan Giurca; Ioan Aschilean; George Sebastian Naghiu; Gheorghe Badea. 2016. "Selecting the Technical Solutions for Thermal and Energy Rehabilitation and Modernization of Buildings." Procedia Technology 22, no. : 789-796.
The selection of the optimal solution regarding the concentration ratio is a complex process, as it depends on a very high number of criteria. The production of renewable energy using the concentrated solar radiation is a field of high scientific level worldwide, while in Romania the research in this field is only in its early stages. The purpose of this document is to present a classification method for photovoltaic systems taking into account the concentration ration. The paper tries to fill in a gap in the field of choosing the photovoltaic systems from the concentration ratio perspective. Based on the study performed, we recommend using the variant A4, namely the technical solution consisting of a photovoltaic system with a 1000x concentration ratio.
George Sebastian Naghiu; Ioan Giurca; Ioan Aschilean; Gheorghe Badea. Multicriterial Analysis on Selecting Solar Radiation Concentration Ration for Photovoltaic Panels Using Electre-boldur Method. Procedia Technology 2016, 22, 773 -780.
AMA StyleGeorge Sebastian Naghiu, Ioan Giurca, Ioan Aschilean, Gheorghe Badea. Multicriterial Analysis on Selecting Solar Radiation Concentration Ration for Photovoltaic Panels Using Electre-boldur Method. Procedia Technology. 2016; 22 ():773-780.
Chicago/Turabian StyleGeorge Sebastian Naghiu; Ioan Giurca; Ioan Aschilean; Gheorghe Badea. 2016. "Multicriterial Analysis on Selecting Solar Radiation Concentration Ration for Photovoltaic Panels Using Electre-boldur Method." Procedia Technology 22, no. : 773-780.