A5089390359- Heat Transfer and Optimization
- Refrigeration and Air Conditioning Technologies
- Heat Transfer and Boiling Studies
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Solar Thermal and Photovoltaic Systems
- Adsorption and Cooling Systems
- Advanced Thermodynamic Systems and Engines
- Building Energy and Comfort Optimization
- Spacecraft and Cryogenic Technologies
- Advanced Sensor Technologies Research
- Energy Efficiency and Management
- Advanced Thermodynamics and Statistical Mechanics
- Heat Transfer Mechanisms
- Advanced Combustion Engine Technologies
- Phase Equilibria and Thermodynamics
- Smart Grid Energy Management
- Food Drying and Modeling
- Fluid Dynamics and Mixing
- Hygrothermal properties of building materials
- Modeling and Simulation Systems
- Solar-Powered Water Purification Methods
- Complex Systems and Decision Making
- Machine Learning in Materials Science
- Thermal Radiation and Cooling Technologies
- Scientific Measurement and Uncertainty Evaluation
Technical University of Denmark
2015-2024
Instituttet for Produktudvikling (Denmark)
2023-2024
University of Florence
2020
Birla Institute of Technology and Science, Pilani
2020
Creative Thermal Solutions
2020
Chalmers University of Technology
2017
Danfoss (Denmark)
2009-2011
Abstract The energy transition is one of the main challenges our society and therefore a major driver for scientific community. To ensure smart to sustainable future scenario different technologies such as harvesting using solar cells or windmills chemical storage in batteries, super-capacitors hydrogen have be developed ultimately deployed. New fabrication approaches based on additive manufacturing digitalization industrial processes increase potential achieve highly efficient required...
Flow boiling of refrigerants in narrow channels has a great potential to cope with future challenges the thermal management high heat flux electronics. This study investigated flow transfer R1234yf, R1234ze(E), and R134a multi-microchannels as applied was varied from incipience critical flux. A parametric analysis on two-phase local coefficients conducted for channel mass fluxes 415 kg/m2s 1153 saturation temperatures 30.5 ∘C 40.5 ∘C. The test section comprised 17 inlet restrictions. were...
The study investigated the characteristics of different natural refrigerants and their mixtures in a residential heat pump with low refrigerant charge. Three main evaluation criteria were utilized for comparing mixtures: Coefficient Performance (COP), Volumetric Heating Capacity (VHC), newly proposed indicator, heating capacity at charge limit. Propane was used as reference refrigerant. It found that some significantly improved both COP limit while maintaining similar volumetric operating...
For zeotropic mixtures, the temperature varies during phase change, which is opposed to isothermal change of pure fluids. The use such mixtures as working fluids in organic Rankine cycle power plants enables a minimization mean difference heat exchangers, beneficial for performance. On other hand, larger transfer surface areas are typically required evaporation and condensation when used In order assess feasibility using it is, therefore, important consider additional costs exchangers. this...
Ejector-equipped transcritical R744 condensing units are believed to lead a low-to-zero commercial refrigeration sector. In order overcome the persisting barrier their wider adoption represented by lack of an affordable ejector control technique, novel pulse-width modulation (PWM) ejector, being low cost, simple and invulnerable clogging was recently implemented. However, additional experimental evaluations needed. Therefore, in this work performance two PWM ejector-equipped units, i.e. with...
This experimental study investigated narrow and high aspect ratio multi-microchannels that were micro-machined in copper with thin separating walls during saturated flow boiling of refrigerants. The hypothesis was these channels could increase the footprint critical heat flux support future development thermal management systems for power electronics other electronic packages. measured as 678.5 W/cm2, which is twice investigations literature concerning Two test samples fabricated a area (10...