A5071002678- Solar Thermal and Photovoltaic Systems
- Building Energy and Comfort Optimization
- Adsorption and Cooling Systems
- Photovoltaic System Optimization Techniques
- Solar Radiation and Photovoltaics
- Phase Change Materials Research
- Heat Transfer and Boiling Studies
- Spacecraft and Cryogenic Technologies
- Solar Energy Systems and Technologies
- Integrated Energy Systems Optimization
- Heat Transfer and Optimization
- Solar-Powered Water Purification Methods
- Technical Engine Diagnostics and Monitoring
- Fluid Dynamics Simulations and Interactions
- Smart Materials for Construction
- Radiative Heat Transfer Studies
- Research in Social Sciences
- Meteorological Phenomena and Simulations
- Methane Hydrates and Related Phenomena
- Advanced Combustion Engine Technologies
- Evacuation and Crowd Dynamics
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Polymer Science and PVC
- Geological Studies and Exploration
- Engineering Applied Research
Technical University of Denmark
2008-2023
Sodium acetate trihydrate and graphite powdermixtures have been evaluated toinvestigate the influence of powder on stability supercooling. A sodium water mixturemixed with was successfully supercooled at ambient indoor temperatures for five months. The stabilized using carboxymetyl cellulose tested in heating supercooling cycles no loss performance. Thermal conductivity enhancing properties shown samples. Since experiments were conducted small scale, 200 g per sample, large scale are...
Fresnel lenses are used in a wide range of solar energy applications, primarily due to their reduced material usage, low cost, and high optical efficiency. This study presents an investigation the world's first full-scale lens collector field. The field consists 144 two-axis tracking collectors manufactured by Danish company Heliac supplies heat local district heating network Lendemarke, Denmark. thermal performance was determined using quasi-dynamic test method. It found that peak...
This study presents the design and performance of Brønderslev hybrid plant – world's first concentrated solar power (CSP)-biomass to utilize waste heat. The combined heat consist a 16.6 MW parabolic trough collector field, two 10 biomass boilers, an organic Rankine cycle (ORC) system with electrical output 4 MW. field boilers are hydraulically connected supply in parallel ORC system. A multi-stage recovery process ensures that is supplied local district heating grid. can also be operated...
In this paper, an open source method for calculating self-shading in fields of two-axis tracking solar collectors arbitrary geometry was developed and validated. The used to investigate the impact latitude collector aperture shape on annual shading loss. Simulations were carried out entire design space field layouts by uniformly discretizing layout parameters, i.e., aspect ratio, offset, rotation, ground cover ratio. Results showed losses generally increase with latitude, optimum ratio...
To enable the transition from fossil fuels as a primary heat source for domestic hot water preparation and space heating solar thermal energy has great potential. The sun disadvantage that it is not always available when there demand. solve this mismatch seasonal storage can be used to store excess summer winter demand higher than supply. Installing long term in one family house needs compact sensible storages are suitable. A latent with phase change material (PCM) provide more way of...
Photovoltaic and solar thermal projects require accurate irradiance data models for the design, assessment, forecasting of power output. For panels collectors installed in arrays, view toward sky ground is restricted by surrounding rows. This paper analyzes impact obstructions on diffuse distribution fixed-tilt addressing insufficient research coverage to date. Irradiance was measured using high-precision pyranometers placed at ten positions throughout an experimental collector array 3.5 6 m...
A latent heat storage based on the phase change material Sodium Acetate Trihydrate (SAT) has been tested as part of a demonstration system. The full consisted 4 individual modules each containing about 200 kg sodium acetate trihydrate with different additives. aim was to actively utilize ability supercool obtain long periods. were charged solar supplied by 22.4 m 2 evacuated tubular collectors. investigation showed that it possible fully charge one module within period 270 minutes clear...
A generic numerical model of PCM water energy storage is developed and validated by experiments. The consists a region region. Models the two regions are derived differential equations solved implicit method. solid-liquid behavior modeled based on its enthalpy-temperature relation, in which melting/solidification phase linearized. Special treatment for time steps with change, significantly improves prediction accuracies temperatures melting fractions. An iteration method applied to coupling...
A novel combined solar heating plant with flat plate collectors (FPC) and parabolic trough (PTC) was constructed put into operation in Taars, 30 km north of Aalborg, Denmark August 2015. To assess the thermal performance plant, global radiation, direct normal irradiance (DNI) total radiation on tilted collector plane field were measured. determine accuracy measurements, calculated radiations, including horizontal diffuse DNI seven empirical models, compared each month based an hourly time...
The investigations showed that the salt water mixture will supercool in a stable way if all hydrate crystals heat storage module are melted during charge period, method to activate solidification of supercooled using boiling CO2 small tank attached outer surface is reliable, content as high theoretically calculated, and durability good. also exchange capacity rate from too low, transfer areas small.
The thermal performance of a 115 L latent heat storage prototype for cooling data centers was investigated. Experimentally, the transfer power and absorbed by exchanger during charging discharging processes were measured at two flow rates (5 10 L/min). Numerically, phase-change models developed using enthalpy effective capacity methods, respectively. results showed that method provides an overall better prediction heat, whereas other only agrees well with melting process. Thus, it is...
The PVT technology combines solar PV and thermal in the same panel.In this way, both electricity heat are produced by panel.Compared to heating is early market stage with only few small weak industries active.Best practices for technology, which still under rapid development, summarized.Marketed systems different panel types, system types components applications considered.The potential advantages needs key actors order establish a successful sustainable future given.Finally, recommendations...
Advanced solar resource assessment and forecasting is necessary for optimal energy utilization. In order to investigate the short-term variability, instance caused by clouds it how affect irradiance, including angular distribution of irradiance. The investigation part Danish contribution task 46 within International Energy Agency financed Agency. focuses on diffuse irradiance based horizontal measurements from 8 different parts sky as well total beam