Experimental Investigation of Energy Savings during Table-Top Hemming of Aluminum Alloys

2014 ◽  
Vol 611-612 ◽  
pp. 947-954 ◽  
Author(s):  
Severin Hönle ◽  
Mathias Liewald
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Point Of View ◽  
The Body ◽  
Force Characteristic ◽  
Automotive Manufacturing ◽  
Process Characteristics ◽  
High Efficient ◽  
Reduction Of Energy Consumption ◽  
Typical Process

The organization of workflow and design of tools and processes in automotive manufacturing will become even more dominated by topics of energy efficiency due to increasing environmental requirements in the future. From this point of view a detailed analysis of all manufacturing processes in the body shop, taking into account the reduction of energy consumption and required area covered by equipment, is necessary. In automotive manufacturing welding and gluing processes as well as metal forming processes are commonly used for joining of single parts to an assembly group, such as doors or closures. In order to determine typical process characteristics as well as to develop more efficient hemming solutions an experimental study was performed in this paper. Using a modular hemming test, representing a conventional table-top hemming process for hang-on parts, theoretical energy consumption during flanging, pre-hemming and final-hemming was determined experimentally. The forming force characteristic shows typical process related development of each single operation. Based on these findings a first experimental parametric study was performed to determine the significance of single material and hemming parameters regarding energy consumption of the entire process workflow. The most significant hemming parameters also were quantified. In a further investigation the identified parameters were used to improve efficiency of the single forming operations (flanging, pre-hemming and final hemming). Therefore are more detailed DoE study was performed considering hemming tool and process parameters. In the final step of the investigation all process steps were combined to a high efficient hemming routine and positive and negative interactions of single steps were considered. For the evaluation of efficient hemming process the quality of the hemming rope was analyzed.

scholarly journals An energy-efficient metro speed profiles for energy savings: application to the Valencia metro

2016 ◽  
Author(s):  
Ignacio Villalba Sanchis ◽  
Pablo Salvador Zuriaga
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Economic Cost ◽  
Rolling Stock ◽  
Net Energy ◽  
General Terms ◽  
Proposed Model ◽  
Single Vehicle ◽  
Reduction Of Energy Consumption ◽  
Actual Energy Consumption

Nowadays one of the main priorities for metro line operators is the reduction of energy consumption, due to the environmental impact and economic cost. In order to achieve this objective different strategies can be applied, normally focused into rolling stock, infrastructure and/or operation. Considering short-term measures and related to the traffic operation strategies, different approaches are being researched. One of the most effective strategy which reduce net energy consumption is the use of efficient driving techniques. These techniques produces a speed profile between two stations that requires the minimum net energy consumption, without degrading commercial running times or passenger comfort. In this paper, a computer model for calculating the metro vehicles speed profiles minimizing the energy consumption was developed. The equations considered in the model represent the behavior of a single vehicle operated under manual driving, subject to different constraints such as the headway, cycle time, distances and acceleration limits. The proposed model calculates different commands to be systematically executed by the driver. The resulting simulator has been tuned by means of on board measurements of speed, accelerations and energy consumption obtained along different lines in Metro de Valencia network. For this purpose, different scenarios are analyzed to assess the achievable energy savings. In general terms and comparing with the actual energy consumption, the solutions proposed can reduce the net energy consumption around 19%.DOI: http://dx.doi.org/10.4995/CIT2016.2016.3774

scholarly journals Systematic Simplified Simulation Methodology for Deep Energy Retrofitting Towards Nze Targets Using Life Cycle Energy Assessment

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3038 ◽  
Author(s):  
José Sánchez Ramos ◽  
MCarmen Guerrero Delgado ◽  
Servando Álvarez Domínguez ◽  
José Luis Molina Félix ◽  
Francisco José Sánchez de la Flor ◽  
...  
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Energy Savings ◽  
Residential Building ◽  
Energy Performance ◽  
Simulation Tools ◽  
Energy Assessment ◽  
Energy Efficiency Improvement ◽  
The Difference ◽  
Reduction Of Energy Consumption

The reduction of energy consumption in the residential sector presents substantial potential through the implementation of energy efficiency improvement measures. Current trends involve the use of simulation tools which obtain the buildings’ energy performance to support the development of possible solutions to help reduce energy consumption. However, simulation tools demand considerable amounts of data regarding the buildings’ geometry, construction, and frequency of use. Additionally, the measured values tend to be different from the estimated values obtained with the use of energy simulation programs, an issue known as the ‘performance gap’. The proposed methodology provides a solution for both of the aforementioned problems, since the amount of data needed is considerably reduced and the results are calibrated using measured values. This new approach allows to find an optimal retrofitting project by life cycle energy assessment, in terms of cost and energy savings, for individual buildings as well as several blocks of buildings. Furthermore, the potential for implementation of the methodology is proven by obtaining a comprehensive energy rehabilitation plan for a residential building. The developed methodology provides highly accurate estimates of energy savings, directly linked to the buildings’ real energy needs, reducing the difference between the consumption measured and the predictions.

scholarly journals Harmonics and Reduction of Energy Consumption in Lighting Systems by Using LED Lamps

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3169 ◽  
Author(s):  
Natthanon Phannil ◽  
Chaiyan Jettanasen ◽  
Atthapol Ngaopitakkul
Keyword(s):  
Energy Consumption ◽  
Power Quality ◽  
Power Factor ◽  
Energy Savings ◽  
Light Emitting Diode ◽  
Total Power ◽  
Increase Energy Efficiency ◽  
Lighting Systems ◽  
Reduction Of Energy Consumption

This paper proposes the study and analysis of harmonics, energy consumption and power quality of light emitting diode (LED) lamps equipped in building lighting systems. LED lamps with external (LED MR16) and internal (LED light bulb) drivers are investigated using an experimental setup to compare the results. The power quality of both LED lamps is studied by using a power quality meter to measure the generated harmonic currents from various case studies. The case study is divided into four major cases: one LED lamp is turned on with one driver, two LED lamps are turned on using the two drivers, eight LED lamps are turned on with one driver, and eight LED lamps are turned on with the eight drivers. As harmonics are related to total power factor (PF), which affects the energy savings of the building, hence, a filtering circuit to reduce harmonic current has been designed and implemented to improve power quality and/or power factor of the system. The different cases of harmonic filter insertion at the input of an LED lamp’s driver are discussed and then compared with a lighting standard to show the effectiveness of the passive filtering technique used in the studied system. In addition, the obtained result can be applied to both newly built and retrofitted buildings that aim to use LED technology to increase energy efficiency and decrease energy costs, and could be a helpful guide for end-users and manufacturers in addressing and developing LED issues.

scholarly journals Effect of external solar shading usage on energy consumption and thermal comfort in the student dormitory in Niš

2019 ◽  
Vol 111 ◽  
pp. 03050
Author(s):  
Dragana Krstić ◽  
Miomir Vasov ◽  
Veliborka Bogdanović ◽  
Marko Ignjatović ◽  
Dušan Ranđelović
Keyword(s):  
Energy Consumption ◽  
Comparative Study ◽  
Thermal Comfort ◽  
Parametric Study ◽  
Energy Savings ◽  
Thermal Conditions ◽  
Point Of View ◽  
South Side ◽  
Solar Shading ◽  
Shading Devices

External fixed shadings are largely used to provide solar protection for building glazed surfaces. They are reducing heat gains and sensational visual discomfort caused by excessive daylighting. This paper presents a comparative study on external aluminium fixed shadings used on a student dormitory on different orientations and different slat angles. The purpose is to determine which slat angles are best to use in different orientations, from the point of view of energy consumption, thermal comfort, and daylighting. An analysis of annual energy consumption of the student dormitory was performed by using the software EnergyPlus, whereas the model of the building was created using SketchUp and OpenStudio software. Then, a parametric study was carried out by changing slat angles and building orientations, in order to find the best-balanced results with no occupant discomfort and possible energy savings. Results have shown that by considering the most balanced results between energy savings and thermal comfort, the best angles of the slats are from 105˚ to 120˚ on the south side, and from 45˚ to 75˚ on the east and west sides. By installing external shading devices, indoor thermal conditions are improving and may lead to significant energy savings, compared to a building without shading devices.

scholarly journals Toward Energy Savings in Campus Buildings under a Life Cycle Thinking Approach

2020 ◽  
Vol 10 (20) ◽  
pp. 7123
Author(s):  
Ricardo Abejón ◽  
Jara Laso ◽  
Marta Rodrigo ◽  
Israel Ruiz-Salmón ◽  
Mario Mañana ◽  
...  
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Energy Use ◽  
Energy Savings ◽  
Raw Materials ◽  
Energy Performance ◽  
Primary Energy ◽  
Point Of View ◽  
Life Cycle Thinking ◽  
Building Industry

Recent studies have identified that buildings all over the world are great contributors to energy consumption and greenhouse gas emissions. The relationship between the building industry and environmental pollution is continuously discussed. The building industry includes many phases: extraction of raw materials, manufacturing, construction, use, and demolition. Each phase consumes a large amount of energy, and subsequent emissions are released. The life cycle energy assessment (LCEA) is a simplified version of the life cycle assessment (LCA) that focuses only on the evaluation of energy inputs for different phases of the life cycle. Operational energy is the energy required for day-to-day operation processes of buildings, such as heating, cooling and ventilation systems, lighting, as well as appliances. This use phase accounts for the largest portion of energy consumption of the life cycle of conventional buildings. In addition, energy performance certification of buildings is an obligation under current European legislation, which promotes efficient energy use, so it is necessary to ensure that the energy performance of the building is upgraded to meet minimum requirements. For this purpose, this work proposes the consideration of the energy impacts and material resources used in the operation phase of a building to calculate the contribution of these energy impacts as new variables for the energy performance certification. The application of this new approach to the evaluation of university buildings has been selected as a case study. From a methodological point of view, the approach relied on the energy consumption records obtained from energy and materials audit exercises with the aid of LCA databases. Taking into practice the proposed methodology, the primary energy impact and the related emissions were assessed to simplify the decision-making process for the energy certification of buildings. From the results obtained, it was concluded that the consumption of water and other consumable items (paper) are important from energy and environmental perspectives.

scholarly journals Improved Configurations For Liquefied Natural Gas Cycles

2018 ◽  
Vol 1 (1) ◽  
pp. 19-37
Author(s):  
Said Al Rabadi
Keyword(s):  
Energy Consumption ◽  
Natural Gas ◽  
Energy Savings ◽  
Liquefied Natural Gas ◽  
Considerable Reduction ◽  
Total Energy Consumption ◽  
Power Efficient ◽  
Natural Gas Liquefaction ◽  
Important Challenge ◽  
Reduction Of Energy Consumption

The most important challenge in a natural gas liquefaction plant is to improve the plant energy efficiency. A process topology should be implemented, which results in a considerable reduction of energy consumption as the natural gas liquefaction process consumes a large amount of energy. In particular, system design focusing on configuring cold part cycle is an attractive option. In this study, various energy recovery-oriented process configurations and the potential improvements of energy savings for small- & midscale liquefied natural gas plants were proposed and compared with almost exclusively commercial trademarks processes. These improved simulation based investigations were validated under the variation in feed gas pressure, mixed refrigerant cooling reference temperature and the pinch temperature of cryogenic plate fin heat exchanger. The simulation results exhibited considerable reduction of specific total energy consumption. Therefore, the proposed liquefaction cycles have a simple topology, hence lower capital cost and compacter plant layout, which is compatible for power-efficient, offshore, floating liquefied natural gas liquefaction plants.

scholarly journals Green Cloud and reduction of energy consumption

2015 ◽  
Vol 4 (1) ◽  
pp. 51-60
Author(s):  
Kamyab Khajehei
Keyword(s):  
Energy Consumption ◽  
Data Centers ◽  
Cloud Data ◽  
Active Devices ◽  
High Efficient ◽  
Efficient Data ◽  
Cloud Data Centers ◽  
Reduce Energy Consumption ◽  
Green Cloud ◽  
Reduction Of Energy Consumption

By using global application environments, cloud computing based data centers growing every day and this exponentially grows definitely effect on our environment. Researchers that have a commitment to their environment and others which was concerned about the electricity bills came up with a solution which called “Green Cloud”. Green cloud data centers based on how consume energy are known as high efficient data centers. In green cloud we try to reduce number of active devices and consume less electricity energy. In green data centers toke an advantage of VM and ability of copying, deleting and moving VMs over the data center and reduce energy consumption. This paper focused on which parts of data centers may change and how researchers found the suitable solution for each component of data centers. Also with all these problems why still the cloud data centers are the best technology for IT businesses.

Development of an optimized game controller for energy saving in a novel interconnected air suspension system

2020 ◽  
Vol 234 (13) ◽  
pp. 3068-3080 ◽  
Author(s):  
Hossein Nazemian ◽  
Masoud Masih-Tehrani
Keyword(s):  
Energy Consumption ◽  
Body Position ◽  
The Body ◽  
Air Pressure ◽  
Roll Angle ◽  
Compressed Air ◽  
Air Suspension ◽  
Game Controller ◽  
Minor Road ◽  
Reduction Of Energy Consumption

In this study, the focus is on reducing the energy that is consumed by a compressor for providing high air pressure in the reservoir. A new air suspension configuration is presented that is titled active interconnected air suspension with outsourced air pressure. In this configuration, a compressor is used to charge the tank; meanwhile, the air springs are connected. For minor excitation, first, the air flows between air springs to control roll angle and height adjustment. If the situation of body position gets worse, the compressed air tank compensates to keep the body not generating roll angle and bounce. This methodology has a benefit. This configuration conserves compressed air in the tank in minor road elevation. The optimized controllers are designed to control roll angle and bounce, but they determine the outsourced air mass flow rate. For switching between interconnection and outsourced mode, there are some rules defined based on game theory for a trade-off between high dynamical performance quality of the vehicle and reduction of energy consumption. The optimization is done on the rules to keep both aspects minimum as much as possible. A three-axle heavy truck is used, and its performance is under discussion on an uneven rough road. Roll angle is improved progressively in novel air suspension configuration, and the energy consumption is reduced. In the default condition, the roll angle is improved 72% from the passive case and 39% from the conventional configuration. Furthermore, the energy consumption optimized version reduces 14% from the non-optimized case and 46% from the outsourced mode. By importing road power spectral density type E and type G, as the short domain and high-frequency vibrations, to two sides of the truck, it is inferred that the vehicle could remain on interconnection mode entirely without using the compressor.

scholarly journals Domestic hot water optimizing potential in existing or renovated multifamily residential buildings

2021 ◽  
Vol 2042 (1) ◽  
pp. 012144
Author(s):  
Flourentzos Flourentzou ◽  
Joshua Pereira
Keyword(s):  
Energy Consumption ◽  
Water Consumption ◽  
Energy Savings ◽  
Storage Temperature ◽  
Residential Buildings ◽  
Hot Water ◽  
Solar Panels ◽  
Reduction Of Energy Consumption ◽  
Actual Energy Consumption

Abstract In a Swiss case study of the ReCO2st research project, hot water optimization demonstrated a high potential for energy savings with low investment costs. The optimization started with the end user to reduce first hot water consumption. Energy-efficient showerheads and faucets reduced hot water consumption by 10 to 25%, notably from 65.2 [l/p.day] to 48 [l/p.day] for the period of September to October 2019. A multi-criteria selection of showerheads involved end users considering other qualitative aspects like rinsing efficiency, overall feel of use, noise, and material robustness. Strict control of pipe and storing tank insulation reduced storage and distribution losses. Day and night storage temperature setpoints, water recirculation time, switching off this process after 11:00 p.m., temperature differential of start and stop loading setpoints, creating long loading cycles, ensure that the pipes are not always hot. Reducing Legionella cycles at 60° to once a day avoided the need for continuous high temperatures. The combination of all these soft measures in the Swiss case study resulted in a reduction of energy consumption for hot water of 20-30%. This is equivalent to the installation of expensive solar panels for hot water. A detailed two-year monitoring of the building's hot water consumption shows the contribution of each optimization measure. The encouraging results show that without perfect control of the entire process, it is impossible to avoid a performance gap between planned and actual energy consumption.

scholarly journals Features of the rolling-separation technology development on operating continuous small-grade mill

2020 ◽  
Vol 63 (5) ◽  
pp. 313-317
Author(s):  
A. R. Fastykovskii ◽  
A. G. Nikitin ◽  
S. V. Belyaev ◽  
A. V. Dobryanskii
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Technology Development ◽  
Energy Costs ◽  
Form Analysis ◽  
Separation Technology ◽  
Reinforcing Bar ◽  
Use Of Technology ◽  
Current Production ◽  
Reduction Of Energy Consumption

Аt present, there is a steady tendency to increase volume of i dustrial and civil construction in Russia and abroad. This in turn makes it necessary to enhance production of structural sections and in particular – reinforcing bar. One of the promising ways to increase production of reinforcing bar at existing rolling mills is development of rollingseparation technology. This technology provides growth in productivity of existing small-grade mills and reduces energy costs without large capital expenditures. However, despite its apparent simplicity, introduction of rolling-separation technology at existing enterprises causes difficulties associated with insufficient coverage of this experience in literature. The article presents experience of introduction of the rolling-separation technology on operating continuous small-grade mill. The research was carried out on equipment available in the workshop and used to monitor load of the main engines. Features of energy costs distribution on stands were studied at classical rolling and with the use of technology of rolling-separation of reinforcing bar No. 10, No. 14 made of 35GS and 3PS steel. Experimental graphs of the main engines of the rolling mill load show redistribution of energy consumption in stands for roughing, intermediate and finishing groups when using rolling-separation technology. Data on application of the main engine power and distribution of the specific load on the stands in classical rolling method and using rolling-separation technology are presented in graphic form. Analysis of the received data allowed us to reveal features of energy consumption at development of rolling-separation technology during operation. It is shown that use of this technology leads to additional load on stands of finishing groups. Energy savings during introduction of rolling-separation technology were quantified, and it was found that with a decrease of the rebar number, efficiency increases. Reduction of energy consumption during development of this technology in current production is associated with a decrease in machine time.

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