NDLI: A gravity independent integrated passive cooler for solar cell efficiency improvement

Content Provider	IEEE Xplore Digital Library
Author	Montès, L. Bercu, B.
Copyright Year	2010
Description	Author affiliation: IMEP-LAHC, UMR 5531 (Grenoble INP, UJF, UdS, CNRS), Minatec, 3 Parvis Louis Néel, 38016, France (Montès, L.; Bercu, B.)
Abstract	Efficient temperature control is an important topic in solar cell development due to the high amount of energy converted into heat. In this context the implementation of heat spreaders as passive devices is of great interest. This contribution concerns an original cooling solution that provides both a high heat conduction coefficient and high level of miniaturization. Integrated in the substrate of the electronic device, the vapor chamber heat spreader is a passive device that provides robustness (absence of mobile parts), with a high conduction coefficient related to the capillary pumping of the liquid. As the dissipated heat flux strongly depends on several parameters, the integration of internal sensors is very useful in order to have in-situ measurements for the optimization of the device. A first prototype of the heat spreader with integrated temperature and pressure micro-sensors has been realized and tested. The heat extraction capability differences have been evidenced using different filling ratio and different cooling liquids. For a hot spot temperature of 70°C, a temperature reduction of about 25% being observed for a 10% ethanol filling of the cavity. Considering the open circuit voltage (V) dependence on the temperature, the temperature drop corresponds to a decrease of V by 25% and thus an important increase in the solar cell efficiency, especially in concentrator solar cells.
Starting Page	003059
Ending Page	003064
File Size	2066261
Page Count	6
File Format	PDF
ISBN	9781424458905
ISSN	01608371
e-ISBN	9781424458929
DOI	10.1109/PVSC.2010.5614492
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heating Ethanol Silicon Three dimensional displays Glass Temperature sensors Context
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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