scholarly journals Model and data management issues in the integrated assessment of existing building stocks

2020 ◽  
Vol 12 (1) ◽  
pp. 2148-2157
Author(s):  
Meliha Honic ◽  
Iva Kovacic
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Laser Scanning ◽  
Raw Materials ◽  
Existing Building ◽  
Modeling And Analysis ◽  
Automated Generation ◽  
Exchange Processes ◽  
Reduction Of Energy Consumption ◽  
Ground Penetrating

AbstractThe increasing population growth and urbanization rises the worldwide consumption of material resources and energy demand. The challenges of the future will be to provide sufficient resources and to minimize the continual amount of waste and energy demand. For the achievement of sustainability, increasing recycling rates and reuse of materials, next to the reduction of energy consumption has the highest priority.This article presents the results of the multidisciplinary research project SCI_BIM, which is conducted on an occupied existing building. Within SCI_BIM, a workflow for coupling digital technologies for scanning and modeling of buildings is developed. Laser scanning is used for capturing the geometry, and ground-penetrating radar is used for assessing material composition. For the semi-automated generation of an as-built BIM, algorithms are developed, wherefore the Point-Cloud serves as a basis. The BIM-model is used for energy modeling and analysis as well as for the automated compilation of Material Passports. Further, a gamification concept will be developed to motivate the buildings’ users to collect data. By applying the gamification concept, the reduction of energy consumption together with an automated update of the as-built BIM will be tested. This article aims to analyze the complex interdisciplinary interactions, data, and model exchange processes of various disciplines collaborating within SCI_BIM.Results show that the developed methodology is confronted with many challenges. Nevertheless, it has the potential to serve as a basis for the creation of secondary raw materials cadaster and for the optimization of energy consumption in existing buildings.

scholarly journals The Integrated Energy Consumption Index for Energy Biomass Grinding Technology Assessment

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1417 ◽  
Author(s):  
Weronika Kruszelnicka ◽  
Robert Kasner ◽  
Patrycja Bałdowska-Witos ◽  
Józef Flizikowski ◽  
Andrzej Tomporowski
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Power Input ◽  
Angular Speed ◽  
Process Efficiency ◽  
Engineering Systems ◽  
Energy Assessment ◽  
Consumption Index ◽  
Reduction Of Energy Consumption ◽  
Current Energy

The assessment of engineering objects in terms of energy consumption is an important part of sustainable development. Many materials, including those from the energy sector, need to undergo earlier processing, e.g., grinding. Grinding processes still demand a significant amount of energy, whereas current energy assessment methods do not take into account important parameters of the process, which makes it difficult to choose their optimal values. The study presents the analysis, testing, and assessment of mechanical engineering systems in terms of the energy consumption involved in the grinding of biomass intended for energy production purposes. A testing methodology was developed to improve the parameters of multi-disc grinding, including the reduction of energy consumption, power input, product quality improvement, and process efficiency. An original model of integrated energy consumption was developed. Tests were carried out on a five-disc grinder for five programs to assess the programmable angular speeds of the grinder discs. Output values, including specific energy demand, fragmentation degree, and integrated energy consumption, were assigned to each testing program. The test results were subjected to statistical analysis. Based on the authors’ own research, it was found that the angular speed of the discs and, consequently, the linear speed of the grinding blades, have a significant influence on the values of the integrated energy consumption of the preliminary process.

scholarly journals Process Efficiency and Energy Consumption During the Extrusion of Potato and Multigrain Formulations

2018 ◽  
Vol 22 (2) ◽  
pp. 49-57 ◽  
Author(s):  
Arkadiusz Matysiak ◽  
Agnieszka Wójtowicz ◽  
Tomasz Oniszczuk
Keyword(s):  
Energy Consumption ◽  
Moisture Content ◽  
Energy Demand ◽  
Rotation Speed ◽  
Raw Materials ◽  
Mechanical Energy ◽  
Extrusion Process ◽  
Raw Material ◽  
Process Efficiency ◽  
Specific Mechanical Energy

AbstractThe aim of the research was to determine the effect of extrusion conditions (various moisture content of raw materials and screw rotation speed), as well as the effect of recipe composition on the process efficiency and the energy consumption during treatment of potato and multigrain products. The efficiency of the extrusion process (Q) was determined by the mass of the product obtained at a given time for all prepared raw material mixtures and the process parameters used, while the specific mechanical energy demand was determined using the SME index. The obtained results allow to conclude that the level of raw materials moisture content had a greater impact on the efficiency and energy consumption of the extrusion process than the variable screw speed during the treatment. The efficiency of the process increased with the increasing moisture of the tested compositions, while a decrease in the requirements of SME was observed. The use of differentiated raw material compositions also influenced the Q and SME values determined during the tests.

scholarly journals Study of the Improvement on Energy Efficiency for a Building in the Mediterranean Area by the Installation of a Green Roof System

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1246 ◽  
Author(s):  
Elisa Peñalvo-López ◽  
Javier Cárcel-Carrasco ◽  
David Alfonso-Solar ◽  
Iván Valencia-Salazar ◽  
Elias Hurtado-Pérez
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
Simulation Analysis ◽  
Green Roof ◽  
Mediterranean Area ◽  
Substantial Improvement ◽  
Winter Period ◽  
Reduction Of Energy Consumption ◽  
Heating Energy Demand

Rooftop gardens ona building have proved to be a good way to improve its storm water management, but many other benefits can be obtained from the installation of these systems, such as reduction of energy consumption, decrease of the heat stress, abatement on CO2 emissions, etc. In this paper, the effect from the presence of these rooftop gardens on abuilding’s energy consumption has been investigated by experimental campaigns using a green roof ona public building in a Mediterranean location in Spain. The obtained results demonstrate a substantial improvement by the installation of the green roof onthe building’s cooling energy demand for a standard summer day, in the order of 30%, and a reduction, about 15%, in the heating energy demand for a winter day. Thus, given the longer duration of the summer conditions along the year, a noticeable reduction on energy demand could be obtained. Simulation analysis, using commercial software TRNSYS code, previously calibrated using experimental data for typical summer and winter days, allows for the extrapolation to the entire year of these results deducing noticeable improvement in energy efficiency, in the order of 19%, but with an increase of 6% in the peak power during the winter period.

Building Energy Simulation with On-Site Weather Station

2016 ◽  
Vol 859 ◽  
pp. 88-92 ◽  
Author(s):  
Radu Manescu ◽  
Ioan Valentin Sita ◽  
Petru Dobra
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Building Energy ◽  
Energy Simulation ◽  
Weather Data ◽  
Building Energy Simulation ◽  
Existing Buildings ◽  
Existing Building ◽  
Simulation Tools ◽  
Heating And Cooling

Energy consumption awareness and reducing consumption are popular topics. Building energy consumption counts for almost a third of the global energy consumption and most of that is used for building heating and cooling. Building energy simulation tools are currently gaining attention and are used for optimizing the design for new and existing buildings. For O&M phase in existing buildings, the multiannual average weather data used in the simulation tools is not suitable for evaluating the performance of the building. In this study an existing building was modeled in EnergyPlus. Real on-site weather data was used for the dynamic simulation for the heating energy demand with the aim of comparing the measured energy consumption with the simulated one. The aim is to develop an early fault detection tool for building management.

scholarly journals Rational Use of Energy Raw Materials in the Context of Sustainable Development in the Slovak Republic

2019 ◽  
Vol 105 ◽  
pp. 04003
Author(s):  
Štefan Kuzevič ◽  
Marcela Bindzárová Gergeľová ◽  
Žofia Kuzevičová
Keyword(s):  
Sustainable Development ◽  
Energy Consumption ◽  
Environmental Protection ◽  
Social Economic ◽  
Slovak Republic ◽  
Raw Materials ◽  
Institutional Development ◽  
Rational Use ◽  
The World ◽  
Reduction Of Energy Consumption

The concept of sustainable development is an important topic in the global concept of the world. It is understood as the unification of social, economic, environmental and institutional development of society. A complicated complex of relationships is formed. The contribution is devoted to selected indicators monitored in Slovakia in the framework of sustainability dealing with the issue of connection and evaluation of environmental protection and exploitation and use of energy raw materials. An important factor is also the reduction of energy consumption, given the decreasing reserves of energy raw materials in Slovakia.

scholarly journals Contribution of Driving Efficiency and Vehicle-to-Grid to Eco-Design

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3997
Author(s):  
David Borge-Diez ◽  
Pedro Miguel Ortega-Cabezas ◽  
Antonio Colmenar-Santos ◽  
Jorge-Juan Blanes-Peiró
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Product Design ◽  
Design Process ◽  
Electric Vehicles ◽  
Raw Materials ◽  
Manufacturing Processes ◽  
Vehicle To Grid ◽  
Improve Energy Efficiency ◽  
Reduction Of Energy Consumption

Designing eco-friendly products involves energy efficiency improvements. Eco-friendly products must consider not only raw materials and manufacturing processes to improve energy efficiency but also energy needed when designing them. This research shows how eco-routing (ER), eco-charging (EC), eco-driving (EDR), vehicle-to-grid (V2G) and electric vehicles (EVs) can contribute to the reduction of energy consumption during product design. To do this, a group of 44 engineers assigned to the project was chosen to assess the total energy available for V2G when driving EVs from their homes to the design center by using ER, ED and EC by running an application coded by the authors. The energy stored in EVs was used to quantify the reduction in energy consumption of the buildings present in the design center. The results show that the energy saving ranges from 2.89% to 6.9% per day—in other words, 93 kWh per day during the design process. In addition, the fact of making the design process greener implies that renewable energies (REs) are integrated better during the design process. By running the application, drivers are informed about the RE mix when the charging process takes place. Finally, this research shows that current policies make V2G and vehicle-to-home techniques not compatible.

scholarly journals Digital-Twin-Based Evaluation of Nearly Zero-Energy Building for Existing Buildings Based on Scan-to-BIM

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Liang Zhao ◽  
Hong Zhang ◽  
Qian Wang ◽  
Haining Wang
Keyword(s):  
Carbon Dioxide Emissions ◽  
Energy Demand ◽  
Laser Scanning ◽  
Clean Energy ◽  
Building Energy ◽  
Existing Buildings ◽  
Zero Energy ◽  
Total Energy Consumption ◽  
Research Issues ◽  
Existing Building

In recent years, the global energy environment has become increasingly severe, and the problems such as global warming, soaring carbon emissions, and excessive use of petrochemical energy have attracted increasing attention from all walks of life. The construction industry, which accounts for about 30% of the total energy consumption, needs to effectively manage and use renewable energy. The application of building information model (BIM) in the evaluation of retrofitting schemes of existing buildings is one of the main research issues in the field of building digital twins at present. The method of this research is to use 3D laser scanning technology to efficiently create the building energy model (BEM) of existing buildings and to identify and evaluate the feasibility of existing building retrofitting schemes. The purpose of this research is to evaluate the retrofitting scheme of existing buildings based on the concept of nearly zero-energy buildings (nZEBs), aiming to improve the energy efficiency of existing buildings and use clean energy to satisfy building energy demand. According to the case study in this paper, an nZEBs solution suitable for the building can reduce building energy costs by 14.1%, increase solar photovoltaic power generation by 24.13%, and reduce carbon dioxide emissions by 4306.0 kg CO2eq/a.

scholarly journals A Simulated Study of Building Integrated Photovoltaics (BIPV) as an Approach for Energy Retrofit in Buildings

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3946 ◽  
Author(s):  
Yasser Farghaly ◽  
Fatma Hassan
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Simulation Software ◽  
Comparative Approach ◽  
Continuous Exposure ◽  
Energy Prices ◽  
Building Sector ◽  
Curtain Wall ◽  
Existing Building ◽  
Building Integrated Photovoltaics

Building envelopes can play a significant role in controlling energy consumption, especially in hot regions because of the wide variety of envelope materials and technologies that have been developed. Currently, because of the high rise in energy prices, especially with the high demand of fossil energy in the building sector worldwide, using curtain walls for maintaining adequate lighting in public buildings could lead to higher energy consumption because of the continuous exposure to the sun in hot regions. For this reason, studying the use of renewable or smart alternatives in the building sector to ensure a cleaner, greener environment by deploying sustainable technology in order to reduce energy demand and support economic long-term solutions would be important for solving such a problem. This paper aims at studying the use of renewable energy technologies and alternatives; represented in new building integrated photovoltaics (BIPVs) technology that could be integrated within building skin to reduce energy demand. The methodology follows a quantitative comparative approach, using an energy simulation software to study two different types of BIPV technology (BISOL Premium BXO 365 Wp monocrystalline and BXU 330 Wp, polycrystalline) on an existing building by retrofitting a part of its curtain wall. This is to conclude the energy saving percentage and feasibility of both alternatives.

scholarly journals Examining the Dynamics of Energy Demand through a Biographical Lens

2014 ◽  
Vol 9 (2) ◽  
pp. 164-182 ◽  
Author(s):  
Catherine Butler ◽  
Karen Anne Parkhill ◽  
Fiona Shirani ◽  
Karen Henwood ◽  
Nick Pidgeon
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Practice Theory ◽  
Processes Of Change ◽  
Low Carbon ◽  
Personal Lives ◽  
Biographical Research ◽  
Reduction Of Energy Consumption

It is widely recognized that a major challenge in low carbon transitioning is the reduction of energy consumption. This implies a significant level of transformation in our ways of living, meaning the challenge is one that runs deep into the fabric of our personal lives. In this article we combine biographical research approaches with concepts from Bourdieu's practice theory to develop understanding of processes of change that embed particular patterns of energy consumption. Through an analysis of “case biographies” we show the value of biographical methods for understanding the dynamics of energy demand.

scholarly journals Batch Reverse Osmosis Desalination Modeling under a Time-Dependent Pressure Profile

Membranes ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 173
Author(s):  
Abdeljalil Chougradi ◽  
François Zaviska ◽  
Ahmed Abed ◽  
Jérôme Harmand ◽  
Jamal-Eddine Jellal ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Reverse Osmosis ◽  
Specific Energy ◽  
Energy Demand ◽  
Specific Energy Consumption ◽  
Pressure Profile ◽  
Recovery Ratio ◽  
Feed Concentration ◽  
Energetic Performance ◽  
Feed Volume

As world demand for clean water increases, reverse osmosis (RO) desalination has emerged as an attractive solution. Continuous RO is the most used desalination technology today. However, a new generation of configurations, working in unsteady-state feed concentration and pressure, have gained more attention recently, including the batch RO process. Our work presents a mathematical modeling for batch RO that offers the possibility of monitoring all variables of the process, including specific energy consumption, as a function of time and the recovery ratio. Validation is achieved by comparison with data from the experimental set-up and an existing model in the literature. Energetic comparison with continuous RO processes confirms that batch RO can be more energy efficient than can continuous RO, especially at a higher recovery ratio. It used, at recovery, 31% less energy for seawater and 19% less energy for brackish water. Modeling also proves that the batch RO process does not have to function under constant flux to deliver good energetic performance. In fact, under a linear pressure profile, batch RO can still deliver better energetic performance than can a continuous configuration. The parameters analysis shows that salinity, pump and energy recovery devices efficiencies are directly linked to the energy demand. While increasing feed volume has a limited effect after a certain volume due to dilution, it also shows, interestingly, a recovery ratio interval in which feed volume does not affect specific energy consumption.

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