Project Details
Description
Cooling efficiency is of the upmost importance in several crucial technological applications, e.g. fuel cells and battery cooling, hybrid airplanes, drones and satellite thermal management.
A promising approach to cope with the always higher heat fluxes requested is represented by phase changing systems which exploit the large latent heat associated with phase change to remove the heat from the hot surface. A robust and effective strategy is to deploy boiling. The basic underlying idea is simple: form vapour bubbles in a liquid in contact with the hot surface and evacuate them through a condenser.
Its implementation, however, faces a number of challenges and requires solution to several fundamental problems. In any practical application the boiler efficiency depends on parameters, such as the frequency of bubble nucleation, their size, and the release rate from the hot surface. However, how to precisely control them is still not clear.
BOIL-MODE-ON aimed at addressing the underlying mechanism of bubble inception and departure during boiling, defining possible new routes and solutions both on the modelling and the practical implementation side.
Dr Francesco Magaletti applied a cutting-edge methodology he developed in the context of cavitation phenomena, based on a mesoscale numerical modelling of the liquid-vapour system embedding thermal fluctuations. A specific campaign of experiments then complemented and supported the analysis using computer models to shed insight on the underlying mechanism of bubble inception and departure during boiling.
This project received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 836693.
A promising approach to cope with the always higher heat fluxes requested is represented by phase changing systems which exploit the large latent heat associated with phase change to remove the heat from the hot surface. A robust and effective strategy is to deploy boiling. The basic underlying idea is simple: form vapour bubbles in a liquid in contact with the hot surface and evacuate them through a condenser.
Its implementation, however, faces a number of challenges and requires solution to several fundamental problems. In any practical application the boiler efficiency depends on parameters, such as the frequency of bubble nucleation, their size, and the release rate from the hot surface. However, how to precisely control them is still not clear.
BOIL-MODE-ON aimed at addressing the underlying mechanism of bubble inception and departure during boiling, defining possible new routes and solutions both on the modelling and the practical implementation side.
Dr Francesco Magaletti applied a cutting-edge methodology he developed in the context of cavitation phenomena, based on a mesoscale numerical modelling of the liquid-vapour system embedding thermal fluctuations. A specific campaign of experiments then complemented and supported the analysis using computer models to shed insight on the underlying mechanism of bubble inception and departure during boiling.
This project received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 836693.
Key findings
This study revealed the effects of surface wettability and dissolved gas, which are two of the most complex topics in the field. Experimental campaigns complemented theoretical work. Precise control of certain parameters that affect boiler efficiency enabled practical implementation of nucleate boiling.
| Acronym | BOIL-MODE-ON |
|---|---|
| Status | Finished |
| Effective start/end date | 1/06/19 → 31/05/21 |
Funding
- Horizon 2020
Keywords
- boiling
- bubble nucleation
- two-phase numerical simulation
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