TITLE:
Performance of Heat Pipe Utilized for Atmospheric Air Heating
AUTHORS:
Mohammed Mansur
KEYWORDS:
Performance, Wrapped Screen, Heat Pipe, Acetone, Air Velocity, Heat Load, Filling Ratio, Temperature Difference
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.3 No.8,
August
26,
2015
ABSTRACT:
The objective of the present experimental
work is to investigate the performance of a wrapped screen heat pipe for atmospheric
air heating to compare with the limits of this pipe. The experiment was
conducted using copper pipe material and acetone as working fluid at different
vapor temperatures. The testing also consists of a heater, a blower for heat
removal (condenser), temperature measuring device, a vapor temperature probe,
acetone charging system, and a vacuum pump. The copper outside diameterof the
pipe is 0.022 m, with a total length of 0.6 m. The results showed that the pipe
wall temperature (Tw) for a wrapped screen heat pipe has a rapid increase and
takes 50 min to reach steady state at (Q = 63 W). The vapour temperature of
working fluid increases as the heat load increases at constant air velocity. It
was also been found that the range of vapour temperature deceases as the
filling ratio increases that means the increasing of the filling ratio results
the decrease of the maximum vapour temperature and the variation in the vapour
temperature. The best recorded filling ratio is 0.6 which has the lowest vapour
temperature at highest heat load. The maximum heat transport limit for this
pipe is 80 W and the maximum temperature difference for air is 5。C.