TITLE:
Natural Convection through Air Filter Media for Cooling of Remote Radio Heads
AUTHORS:
Adam Martin, Lucius Akalanne
KEYWORDS:
Natural Convection, Air Filter, Porous Media
JOURNAL NAME:
Journal of Electronics Cooling and Thermal Control,
Vol.4 No.2,
June
30,
2014
ABSTRACT: Passive cooling techniques are
cost effective and reliable methods of cooling remote radio heads (RRH). This
paper investigates the plausibility of a passive cooling technique involving
exchanging warm air, from the internal cavity of RRHs, with fresh ambient air,
to reduce the operating temperature using natural convection across air
filters. The results indicate that, an internal air filter tube structure, with
width of the enclosure, running vertically up the middle of an RRH, along with
4 pleat filter sides (2.0 ± 0.5 cm separation) provides the most effective
outdoor suitable setup out of those examined. This provides a reduction in
temperature of 3.9°K ± 0.4°K in the PA and 4.0°K ± 0.4°K in the radio, and a reduction in mass of 0.45 ± 0.05 kg, and is
capable of withstanding water ingress and corrosive conditions including wind
driven rain and salt fog.