Refine
Year of publication
Institute
- Fachbereich Bauingenieurwesen (711) (remove)
Document Type
- Article (333)
- Conference Proceeding (139)
- Book (118)
- Part of a Book (86)
- Report (19)
- Doctoral Thesis (6)
- Contribution to a Periodical (2)
- Course Material (2)
- Patent (2)
- Working Paper (2)
Keywords
- Kanalisation (4)
- Wasserbau (4)
- Wasserwirtschaft (4)
- metal structure (4)
- steel (4)
- Aachen / Fachhochschule Aachen / Fachbereich Bauingenieurwesen (3)
- Absolvententreffen (3)
- Alfha.net (3)
- Alumni (3)
- Fließgewässer (3)
- Geodatenbank (3)
- Geodatenhaltung (3)
- Geoinformationen (3)
- Geoinformationssystem (3)
- Kanalnetz (3)
- industrial research (3)
- iron and steel industry (3)
- materials technology (3)
- research report (3)
- Abwasser (2)
- Architektur (2)
- Bauplanung (2)
- Bemessung (2)
- Deutschland (2)
- Haustechnik (2)
- Heizung (2)
- Hochwasserschutz (2)
- Kanalisierung (2)
- Kanalnetzberechnung (2)
- Kanalsanierung (2)
- Klimatechnik (2)
- Lüftung (2)
- Lüftungstechnik (2)
- Renaturierung <Ökologie> (2)
- Stickstoffoxide (2)
- building industry (2)
- building information modelling (2)
- building materials (2)
- energy efficiency (2)
- research project (2)
- resistance of materials (2)
- 20 fossil-fueled power plants (1)
- 3D printing (1)
- ACCESS 2003 (1)
- ACCESS <Programm> (1)
- Abdichtung (1)
- Abflussbildung (1)
- Abflussmessung (1)
- Abflusssteuerung (1)
- Abluft (1)
- Abwasseranlage (1)
- Access (1)
- Algal Turf Scrubber (1)
- Algal–bacterial bioflm (1)
- Anammox (1)
- Anlagenwirtschaft (1)
- Anschlüsse an Stahlbeton (1)
- AutoCAD (1)
- AutoCAD 2005 (1)
- BIM (1)
- Bauführung (1)
- Bauherrenvertretung (1)
- Bauleitung (1)
- Bauphysik (1)
- Baurevision (1)
- Bauschaden (1)
- Bauteil (1)
- Behälterbau (1)
- Berufsperspektiven (1)
- Bewertung (1)
- Biogas (1)
- Brandfall (1)
- Brandschutz (1)
- Braunkohlenbergbau (1)
- Brückenbau (1)
- CAD (1)
- Circular bioeconomy (1)
- Deponierverhalten (1)
- Deutsche Bahn Netz AG (1)
- Didaktik (1)
- Druckvergasung (1)
- Druckwirbelschichtfeuerung (1)
- EN 1993-1-2 (1)
- Eingespannte Stützen und Träger (1)
- Einspanntiefen (1)
- Energy system (1)
- Entstaubung (1)
- Entwässerung <Bauwesen> (1)
- Festigkeitslehre (1)
- Filter (Stofftrennung) (1)
- Filterkuchen (1)
- Filtration (1)
- Forschung, pränormativ (1)
- Freshmen (1)
- Geodateninfrastruktur (1)
- Geotechnik (1)
- Gewässerausbau (1)
- HVAC (1)
- Hauptbahnhof Aachen (1)
- Hausanschluss (1)
- Hazard assessment (1)
- Heterogene Katalyse (1)
- Hochdruckleitung (1)
- Hochwasservorsorge (1)
- Hydraulic structures (1)
- Hydrologie (1)
- Ingenieurbau (1)
- Kanal (1)
- Kanalbau (1)
- Kanalbetrieb (1)
- Kanalinspektion (1)
- Kanalnetzmodellierung (1)
- Kohlefeuerung (1)
- Kohlenmonoxidbelastung (1)
- Konstruktiver Ingenieurbau (1)
- Kraftwerkstechnik (1)
- Landslide tsunamis (1)
- Large scale tests (1)
- Leitungsbau (1)
- Leitungsbauunternehmen (1)
- Lysimeter (1)
- MBRA (1)
- Mainstream (1)
- Methane (1)
- Mischen (1)
- Mischwasser (1)
- Mischwassereinleitung (1)
- Mixed integer linear programming (MILP) (1)
- Müllsortierung (1)
- N-A-Modelle (1)
- Nasskühlturm (1)
- Niederschlag-Abfluss-Modelle (1)
- Nitrogen removal (1)
- Oberflächenabflussmodell (1)
- Open channels (1)
- Overland flow (1)
- PIMS (1)
- PIV (1)
- Parallelisierung (1)
- Partial nitritation (1)
- Physical modeling (1)
- Pipeline Integrity Management System (1)
- Proper Orthogonal Decomposition (1)
- Prozesssimulation (1)
- Q-criterion (1)
- Rauchgasreinigung (1)
- Reduktion <Chemie> (1)
- Relationale Datenbank (1)
- Renewable energy (1)
- Restabfall (1)
- Restmüll (1)
- Rohrreaktor (1)
- Schachterfassung (1)
- Schadgas (1)
- Sharing mobility (1)
- Similitude (1)
- Smart Building Engineering (1)
- Solitary waves (1)
- Stadtentwässerung (1)
- Stahlprofile (1)
- Statiker (1)
- Stauanlage (1)
- Staubfilter (1)
- Sümpfungswassereinleitung (1)
- Time-series aggregation (1)
- Tragwerksbemessung (1)
- Trockenkühlturm (1)
- Tunnelbau (1)
- Typical periods (1)
- Umbauplanung (1)
- VOF (1)
- Verkehrsbau (1)
- Visualisierung (1)
- Wassergüte (1)
- Wastewater (1)
- Wirbelschichtfeuerung (1)
- Wärmelastplan (1)
- anammox (1)
- building safety (1)
- building technique (1)
- business models (1)
- ceramics (1)
- coherent structures (1)
- construction (1)
- dam-break (1)
- designs and models (1)
- digital teaching (1)
- digitale Lehre (1)
- drag force (1)
- electro mobility (1)
- emote practical training (1)
- energy disspation (1)
- filtration (1)
- food production (1)
- friction (1)
- gas flow (1)
- geotechnical engineering (1)
- guide (1)
- hot gas cleanup (1)
- hydraulic modelling (1)
- ingot (1)
- keramischer Werkstoff (1)
- kombiniertes Verfahren (1)
- lockdown conditions (1)
- mainstream deammonification (1)
- mobility behaviour (1)
- model performance (1)
- nitrogen elimination (1)
- numerical model (1)
- physical model (1)
- prefabrication (1)
- remote teamwork (1)
- renewable energy (1)
- roleplay (1)
- small and medium scaled companies (1)
- smart building engineering (1)
- smart engineering (1)
- steel profiles (1)
- structural design (1)
- sustainability (1)
- testing (1)
- thermal insulation (1)
- urban farming (1)
- verteiltes Rechnen (1)
- virtual reality (1)
- wastewater (1)
- wave run-up (1)
- Öffentlich bestellter Sachverständiger (1)
In the context of the Corona pandemic and its impact on teaching like digital lectures and exercises a new concept especially for freshmen in demanding courses of Smart Building Engineering became necessary. As there were hardly any face-to-face events at the university, the new teaching concept should enable a good start into engineering studies under pandemic conditions anyway and should also replace the written exam at the end. The students should become active themselves in small teams instead of listening passively to a lecture broadcast online with almost no personal contact. For this purpose, a role play was developed in which the freshmen had to work out a complete solution to the realistic problem of designing, construction planning and implementing a small guesthouse. Each student of the team had to take a certain role like architect, site manager, BIM-manager, electrician and the technitian for HVAC installations. Technical specifications must be complied with, as well as documentation, time planning and cost estimate. The final project folder had to contain technical documents like circuit diagrams for electrical components, circuit diagrams for water and heating, design calculations and components lists. On the other hand construction schedule, construction implementation plan, documentation of the construction progress and minutes of meetings between the various trades had to be submitted as well. In addition to the project folder, a model of the construction project must also be created either as a handmade model or as a digital 3D-model using Computer-aided design (CAD) software. The first steps in the field of Building information modelling (BIM) had also been taken by creating a digital model of the building showing the current planning status in real time as a digital twin. This project turned out to be an excellent training of important student competencies like teamwork, communication skills, and self -organisation and also increased motivation to work on complex technical questions. The aim of giving the student a first impression on the challenges and solutions in building projects with many different technical trades and their points of view was very well achieved and should be continued in the future.
Urban farming is an innovative and sustainable way of food production and is becoming more and more important in smart city and quarter concepts. It also enables the production of certain foods in places where they usually dare not produced, such as production of fish or shrimps in large cities far away from the coast. Unfortunately, it is not always possible to show students such concepts and systems in real life as part of courses: visits of such industry plants are sometimes not possible because of distance or are permitted by the operator for hygienic reasons. In order to give the students the opportunity of getting into contact with such an urban farming system and its complex operation, an industrial urban farming plant was set up on a significantly smaller scale. Therefore, all needed technical components like water aeriation, biological and mechanical filtration or water circulation have been replaced either by aquarium components or by self-designed parts also using a 3D-printer. Students from different courses like mechanical engineering, smart building engineering, biology, electrical engineering, automation technology and civil engineering were involved in this project. This “miniature industrial plant” was also able to start operation and has now been running for two years successfully. Due to Corona pandemic, home office and remote online lectures, the automation of this miniature plant should be brought to a higher level in future for providing a good control over the system and water quality remotely. The aim of giving the student a chance to get to know the operation of an urban farming plant was very well achieved and the students had lots of fun in “playing” and learning with it in a realistic way.
The worldwide Corona pandemic has severely restricted student projects in the higher semesters of engineering courses. In order not to delay the graduation, a new concept had to be developed for projects under lockdown conditions. Therefore, unused rooms at the university should be digitally recorded in order to develop a new usage concept as laboratory rooms. An inventory of the actual state of the rooms was done first by taking photos and listing up all flaws and peculiarities. After that, a digital site measuring was done with a 360° laser scanner and these recorded scans were linked to a coherent point cloud and transferred to a software for planning technical building services and supporting Building Information Modelling (BIM). In order to better illustrate the difference between the actual and target state, two virtual reality models were created for realistic demonstration. During the project, the students had to go through the entire digital planning phases. Technical specifications had to be complied with, as well as documentation, time planning and cost estimate. This project turned out to be an excellent alternative to on-site practical training under lockdown conditions and increased the students’ motivation to deal with complex technical questions.
Even though BIM (Building Information Modelling) is successfully implemented in most of the world, it is still in the early stages in Germany, since the stakeholders are sceptical of its reliability and efficiency. The purpose of this paper is to analyse the opportunities and obstacles to implementing BIM for prefabrication. Among all other advantages of BIM, prefabrication is chosen for this paper because it plays a vital role in creating an impact on the time and cost factors of a construction project. The project stakeholders and participants can explicitly observe the positive impact of prefabrication, which enables the breakthrough of the scepticism factor among the small-scale construction companies. The analysis consists of the development of a process workflow for implementing prefabrication in building construction followed by a practical approach, which was executed with two case studies. It was planned in such a way that, the first case study gives a first-hand experience for the workers at the site on the BIM model so that they can make much use of the created BIM model, which is a better representation compared to the traditional 2D plan. The main aim of the first case study is to create a belief in the implementation of BIM Models, which was succeeded by the execution of offshore prefabrication in the second case study. Based on the case studies, the time analysis was made and it is inferred that the implementation of BIM for prefabrication can reduce construction time, ensures minimal wastes, better accuracy, less problem-solving at the construction site. It was observed that this process requires more planning time, better communication between different disciplines, which was the major obstacle for successful implementation. This paper was carried out from the perspective of small and medium-sized mechanical contracting companies for the private building sector in Germany.
Holzbau
(2021)
Unsteady shallow meandering flows in rectangular reservoirs: a modal analysis of URANS modelling
(2022)
Shallow flows are common in natural and human-made environments. Even for simple rectangular shallow reservoirs, recent laboratory experiments show that the developing flow fields are particularly complex, involving large-scale turbulent structures. For specific combinations of reservoir size and hydraulic conditions, a meandering jet can be observed. While some aspects of this pseudo-2D flow pattern can be reproduced using a 2D numerical model, new 3D simulations, based on the unsteady Reynolds-Averaged Navier-Stokes equations, show consistent advantages as presented herein. A Proper Orthogonal Decomposition was used to characterize the four most energetic modes of the meandering jet at the free surface level, allowing comparison against experimental data and 2D (depth-averaged) numerical results. Three different isotropic eddy viscosity models (RNG k-ε, k-ε, k-ω) were tested. The 3D models accurately predicted the frequency of the modes, whereas the amplitudes of the modes and associated energy were damped for the friction-dominant cases and augmented for non-frictional ones. The performance of the three turbulence models remained essentially similar, with slightly better predictions by RNG k-ε model in the case with the highest Reynolds number. Finally, the Q-criterion was used to identify vortices and study their dynamics, assisting on the identification of the differences between: i) the three-dimensional phenomenon (here reproduced), ii) its two-dimensional footprint in the free surface (experimental observations) and iii) the depth-averaged case (represented by 2D models).
This study investigated the anaerobic digestion of an algal–bacterial biofilm grown in artificial wastewater in an Algal Turf Scrubber (ATS). The ATS system was located in a greenhouse (50°54′19ʺN, 6°24′55ʺE, Germany) and was exposed to seasonal conditions during the experiment period. The methane (CH4) potential of untreated algal–bacterial biofilm (UAB) and thermally pretreated biofilm (PAB) using different microbial inocula was determined by anaerobic batch fermentation. Methane productivity of UAB differed significantly between microbial inocula of digested wastepaper, a mixture of manure and maize silage, anaerobic sewage sludge, and percolated green waste. UAB using sewage sludge as inoculum showed the highest methane productivity. The share of methane in biogas was dependent on inoculum. Using PAB, a strong positive impact on methane productivity was identified for the digested wastepaper (116.4%) and a mixture of manure and maize silage (107.4%) inocula. By contrast, the methane yield was significantly reduced for the digested anaerobic sewage sludge (50.6%) and percolated green waste (43.5%) inocula. To further evaluate the potential of algal–bacterial biofilm for biogas production in wastewater treatment and biogas plants in a circular bioeconomy, scale-up calculations were conducted. It was found that a 0.116 km2 ATS would be required in an average municipal wastewater treatment plant which can be viewed as problematic in terms of space consumption. However, a substantial amount of energy surplus (4.7–12.5 MWh a−1) can be gained through the addition of algal–bacterial biomass to the anaerobic digester of a municipal wastewater treatment plant. Wastewater treatment and subsequent energy production through algae show dominancy over conventional technologies.