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Anomalous Cooling and Overcooling of Active Colloids
Physical Review Letters, 2022The phenomenon that a system at a hot temperature cools faster than at a warm temperature, referred to as the Mpemba effect, has recently been realized for trapped colloids. Here, we investigate the cooling and heating process of a self-propelled active colloid using numerical simulations and theoretical calculations with a model that can be directly ...
Fabian Jan Schwarzendahl, Hartmut Löwen
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Elastocaloric cooling: Stretch to actively cool
Nature Energy, 2016The elastocaloric effect can be exploited in solid-state cooling technologies as an alternative to conventional vapour compression. Now, an elastocaloric device based on the concept of active regeneration achieves a temperature lift of 15.3 K and efficiencies competitive with other caloric-based approaches.
Ossmer, Hinnerk, Kohl, Manfred
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Cooling of an Active Magnetic Bearing
Известия высших учебных заведений. Электромеханика, 2021In this paper temperature field of the magnetic bearing of a gas compressor unit was considered. A two dimension mathematical model was prepared. Model parameters were calculated with using of analytical techniques and laws of similarity. In result of numerical simulation temperature distribution of the magnetic bearing was made specific.
Yuri Ivannikov +2 more
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Active Transient Cooling by Magnetocaloric Materials
Applied Thermal Engineering, 2013 The magnetocaloric effect (MCE) has been intensively studied for novel energy efficient thermal management systems. The present study demonstrates a proof-of-concept magnetic cooling setup for active cooling of the thermal spikes of a heated resistor ...
Pawel Keblinski +2 more
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Magnetic Activity in Cool Stars
Space Science Reviews, 1985Aspects of magnetic activity of late-type stars are reviewed: first, results obtained through the comparison of emissions from various temperature regimes in the outer atmospheres of cool stars, then results from stellar soft X-ray spectroscopy. Spectra obtained with different instruments (Imaging Proportional Counter and Solid State Spectrometer ...
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Evaluation of Horizontal Cooling Channels For Actively Cooled Limiters
Fusion Technology, 1986The heat flux and fluid flow conditions for a water cooled limiter tube are simulated with an electron beam heating apparatus, and the results are compared to empirical models based on existing heating transfer correlations. For the conditions of highly subcooled flow boiling in a horizontal tube subjected to a heat flux from only one side, two ...
J. A. Koski, J. B. Whitley
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Actively Controlled Cooling Jets
SAE Technical Paper Series, 2003<div class="htmlview paragraph">A proof-of-concept study has been undertaken to demonstrate the use and potential benefits of actively controlled coolant jets in an IC engine cooling gallery simulator. Results have shown that substantial reductions in coolant volumes are possible and that the control of the liquid/metal surface temperature can be
A. Vagenas +5 more
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Active cooling for on-machine device
2017 IEEE Energy Conversion Congress and Exposition (ECCE), 2017In permanent magnet servo motors, each component has a certain temperature limit. For on-machine device with electronic components, like the high resolution optical encoder, the temperature limit is commonly less than 125°C. While for the motor body, the winding and the magnets usually have higher temperature limit.
Xikai Sun +2 more
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1997
Space cryogenics tries to solve the problems connected with cooling down components in space missions. Very low temperatures are required in particular to cool radiation detectors used in astrophysics. Up to now the cryogenic problems have been solved by using a reservoir containing a cryogen, say liquid helium, on board satellites.
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Space cryogenics tries to solve the problems connected with cooling down components in space missions. Very low temperatures are required in particular to cool radiation detectors used in astrophysics. Up to now the cryogenic problems have been solved by using a reservoir containing a cryogen, say liquid helium, on board satellites.
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Optimization of thermoelectric cooling technology for an active cooling of photovoltaic panel
Renewable and Sustainable Energy Reviews, 2017Abstract The electrical efficiency of PV panel is undesirably influenced by the rise in the panel temperature and accelerates cell degradation which leads to reduction of life expectancy of PV module. A fall in PV module output power with rise in temperature is observed on non-removal of this excessive heat.
Aarti Kane, Vishal Verma, Bhim Singh
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