full2011_inter.pdf - page 129

2011 International Conference on Alternative Energy in Developing Countries and Emerging Economies
- 129 -
(C) C
ASE OF METHANOL
IV. C
ONCLUSION
The two phase flow patterns of working fluid, R123,
acetone and methanol inside oscillating heat pipe when it
acted as an extended surface of a heat exchanger were
observed by a flow visualization. The phenomena
depended upon the surface temperature, the capillary tube
diameter and the tube pitch. It was found that R123 was
the best working fluid that could operate under a wide
range of operating temperatures.
A
CKNOWLEDGEMENT
The authors would like to thank the Electricity
Generating Authority of Thailand for facilitating the
testing equipments and the Commission on Higher
Education, Thailand for funding this research study.
R
EFERENCE
[1] A. Nuntaphan, S. Vithayasai, N. Vorayos, N. Vorayos and
T. Kiatsiriroat,
Use of oscillating heat pipe technique as
extended surface in wire-on-tube heat exchanger for heat
transfer enhancement,
International communications in heat
and mass transfer, vol. 37, 2009, pp. 287-292.
[2] P. Charoensawan, P. Terdtoon, P. Tantakom, P. Ingsuwan
and M. Groll,
Effects of inclination angles, filling ratios and
total lengths on heat transfer characteristic of a closed-loop
oscillating heat pipes,
Proceeding of the 6
th
heat pipe
symposium, Chiang Mai, 2000.
[3] B.Y. Tong, T.N. Wong and K.T. Ooi.,
Closed pulsating heat
pipe,
Applied Thermal Engineering, vol.21, 2001, pp. 1845-
1862.
[4] P. Charoensawan, S. Khandekar, M. Groll and P. Terdtoon,
Closed loop pulsating heat pipes - Part A: parametric
experimental investigations,
Applied Thermal Engineering,
vol. 23, 2003, pp. 2009-2020.
[5] S. Khandekar, P. Charoensawan, M. Groll and P. Terdtoon,
Closed loop pulsating heat pipes - Part B: visualization and
semi-empirical modeling,
Applied Thermal Engineering,
vol. 23, 2003, pp. 2021-2033.
[6] P. Charoensawan, P. Terdtoon,
Thermal performance
correlation of horizontal closed-loop oscillating heat pipes,
Proceeding of the 9
th
Electronics Packaging Technology
Conference, IEEE, Singapore, 2007.
[7] V.I. Dmitrin, and Yu.F. Maidanik,
Experimental
Investigations of a Closed-loop Oscillating heat pipe,
High
Temperature, vol.45 no.5, 2007, pp.703-707.
[8] H. Yang ,* S. Khandekar and M. Groll,
Operational limit of
closed loop pulsating heat pipes,
Applied Thermal
Engineering, vol. 28, 2008, pp. 49
59.
[9] T. Samana,
T. Kiatsiriroat and A. Nuntaphan
,
Air-side
Performance Analysis of Wire-on-tube Heat Exchanger
Having Oscillating Heat Pipe as Extended Surface under
Natural Convection Condition,
Heat Transfer Engineering
2011, (Accepted)
1...,119,120,121,122,123,124,125,126,127,128 130,131,132,133,134,135,136,137,138,139,...354
Powered by FlippingBook