Solar-Institut Jülich
Refine
Year of publication
Document Type
- Conference Proceeding (167)
- Article (107)
- Part of a Book (23)
- Report (20)
- Book (17)
- Doctoral Thesis (3)
- Contribution to a Periodical (2)
Keywords
- Energy storage (4)
- Power plants (4)
- Associated liquids (3)
- Concentrated solar power (3)
- Hybrid energy system (3)
- Central receiver power plant (2)
- Central receiver system (2)
- Concentrated solar collector (2)
- Concentrated systems (2)
- Electricity generation (2)
- Gas turbine (2)
- Haustechnik (2)
- Heizung (2)
- Klimatechnik (2)
- Lüftung (2)
- Lüftungstechnik (2)
- Solar concentration (2)
- Solar thermal technologies (2)
- Stickstoffoxide (2)
- building information modelling (2)
- 20 fossil-fueled power plants (1)
- 3D printing (1)
- Abluft (1)
- Acceptance tests (1)
- BIM (1)
- Camera system (1)
- Ceramics (1)
- Cloud passages (1)
- Concentrating solar power (1)
- Control optimization (1)
- DNI forecast (1)
- DNI forecasting (1)
- Decision theory (1)
- Direct normal irradiance forecast (1)
- District data model (1)
- District energy planning platform (1)
- Druckvergasung (1)
- Druckwirbelschichtfeuerung (1)
- Dynamic simulation (1)
- Electrochemistry (1)
- Energiekonzept (1)
- Energy system (1)
- Energy system planning (1)
- Entstaubung (1)
- Feuchtigkeit (1)
- Filter (Stofftrennung) (1)
- Filterkuchen (1)
- Filtration (1)
- Freshmen (1)
- Fresnel collector (1)
- Fresnel power plant (1)
- Gesamtwassergehalt (1)
- Global change (1)
- HVAC (1)
- Heliostat Field Calibration (1)
- Heliostats (1)
- Heterogene Katalyse (1)
- Hybridization (1)
- Kohlefeuerung (1)
- Kohlenmonoxidbelastung (1)
- Kraftwerkstechnik (1)
- Measuring instruments (1)
- Mischen (1)
- Mixed integer linear programming (MILP) (1)
- Modelica (1)
- Molten salt receiver (1)
- Molten salt receiver system (1)
- Molten salt receiver system, (1)
- Molten salt solar tower (1)
- Nasskühlturm (1)
- Nowcasting (1)
- Optical and thermal analysis (1)
- PTC (1)
- Parabolic trough collector (1)
- Performance measurement (1)
- Photovoltaics (1)
- Plant efficiency (1)
- Power conversion systems (1)
- Process prediction (1)
- Prozesssimulation (1)
- Quadrocopter (1)
- Rauchgasreinigung (1)
- Reduktion <Chemie> (1)
- Renewable energy (1)
- Renewable energy integration (1)
- Rohrreaktor (1)
- Schadgas (1)
- Smart Building Engineering (1)
- Solar dish (1)
- Solar irradiance (1)
- Star design (1)
- Staubfilter (1)
- Thermal Energy Storage (1)
- Time-series aggregation (1)
- Transient flux distribution (1)
- Trockenkühlturm (1)
- Two-phase modelling (1)
- Typical periods (1)
- UAV (1)
- Uncertainty analysis (1)
- Unmanned aerial vehicle (1)
- Verdunstungskälte (1)
- Wirbelschichtfeuerung (1)
- borefields (1)
- building energy modelling (1)
- building energy simulation (1)
- ceramics (1)
- concentrating collector (1)
- construction (1)
- digitalization (1)
- dissemination (1)
- emote practical training (1)
- energy (1)
- energy concept (1)
- energy transition (1)
- filtration (1)
- food production (1)
- gas flow (1)
- geothermal (1)
- heat demand (1)
- heat transfer coefficient (1)
- hot gas cleanup (1)
- keramischer Werkstoff (1)
- kombiniertes Verfahren (1)
- lockdown conditions (1)
- open educational resources (1)
- point-focussing system (1)
- prefabrication (1)
- raytracing (1)
- remote teamwork (1)
- renewable energies (1)
- roleplay (1)
- sizing (1)
- small and medium scaled companies (1)
- smart building engineering (1)
- smart engineering (1)
- solar process heat (1)
- sustainability (1)
- urban farming (1)
- virtual reality (1)
Institute
- Solar-Institut Jülich (339) (remove)
Die Versorgung von Neubauten soll möglichst weitgehend unabhängig von fossilen Energieträgern erfolgen. Erneuerbare Energien spielen dafür eine gewichtige Rolle. Eine gute Möglichkeit, erneuerbare Energien ohne viel zusätzlichen Aufwand nutzbar zu machen, ist, bereits vorhandenen Komponenten im Gebäude zusätzliche Funktionen zu geben. Hier kann bspw. die Fassade oder das Dach solarthermisch aktiviert oder durch Fotovoltaikmodule ergänzt werden. Auch Tiefgründungen können neben der statischen Funktion noch eine geothermische Funktion zur Aufnahme oder Abgabe von Wärme erhalten. Neben der Erzeugung bietet sich auch für die Verteilung der Wärme oder Kälte im Gebäude die Integration in Bauteile an. Hier kann bspw. der Boden durch eine Fußbodenheizung oder die Decke durch Deckenstrahlplatten aktiviert werden.
Im Rahmen der Veröffentlichung wird auf die thermische Aktivierung von Stahlkomponenten eingegangen. Es wird eine Lösung vorgestellt, die vorgehängte hinterlüftete Stahlfassade (VHF) solarthermisch zu aktivieren. Außerdem werden zwei Möglichkeiten zur geothermischen Aktivierung von Tiefgründungen mittels Stahlpfählen gezeigt. Zuletzt wird ein System zur thermischen Aktivierung von Stahltrapezprofilen an der Decke erläutert, welches Wärme zuführen oder bei Bedarf abführen kann.
Previous studies optimized the dimensions of coaxial heat exchangers using constant mass fow rates as a boundary condition. They show a thermal optimal circular ring width of nearly zero. Hydraulically optimal is an inner to outer pipe radius ratio of 0.65 for turbulent and 0.68 for laminar fow types. In contrast, in this study, fow conditions in the circular ring are kept constant (a set of fxed Reynolds numbers) during optimization. This approach ensures fxed fow conditions and prevents inappropriately high or low mass fow rates. The optimization is carried out for three objectives: Maximum energy gain, minimum hydraulic efort and eventually optimum net-exergy balance. The optimization changes the inner pipe radius and mass fow rate but not the Reynolds number of the circular ring. The thermal calculations base on Hellström’s borehole resistance and the hydraulic optimization on individually calculated linear loss of head coefcients. Increasing the inner pipe radius results in decreased hydraulic losses in the inner pipe but increased losses in the circular ring. The net-exergy diference is a key performance indicator and combines thermal and hydraulic calculations. It is the difference between thermal exergy fux and hydraulic efort. The Reynolds number in the circular ring is instead of the mass fow rate constant during all optimizations. The result from a thermal perspective is an optimal width of the circular ring of nearly zero. The hydraulically optimal inner pipe radius is 54% of the outer pipe radius for laminar fow and 60% for turbulent fow scenarios. Net-exergetic optimization shows a predominant infuence of hydraulic losses, especially for small temperature gains. The exact result depends on the earth’s thermal properties and the fow type. Conclusively, coaxial geothermal probes’ design should focus on the hydraulic optimum and take the thermal optimum as a secondary criterion due to the dominating hydraulics.
The optical performance of a 2-axis solar concentrator was simulated with the COMSOL Multiphysics® software. The concentrator consists of a mirror array, which was created using the application builder. The mirror facets are preconfigured to form a focal point. During tracking all mirrors are moved simultaneously in a coupled mode by 2 motors in two axes, in order to keep the system in focus with the moving sun. Optical errors on each reflecting surface were implemented in combination with the solar angular cone of ± 4.65 mrad. As a result, the intercept factor of solar radiation that is available to the receiver was calculated as a function of the transversal and longitudinal angles of incidence. In addition, the intensity distribution on the receiver plane was calculated as a function of the incidence angles.
The Lehrstuhl für Wärmeübertragung und Klimatechnik at the Aachen University of Technology operates several test facilities to investigate fundamentals of heat and mass transfer supported by the Deutsche Forschungsgemeinschaft, the Minister für Forschung und Technologie and the industry. In order to get high-resolution and reproselection of hardware components is as critical as the design of software routines to perform successful and accurate measurements. In the following the development of the measurement and control system for three different test facilities is presented and discussed. Special attention is given to the education of students within the framework of laboratories and scientific experiments.