Experimental Investigation on the Effection of Flow Regulator in a Multiple Evaporators/Condensers Loop Heat Pipe with Plastic Porous Structure ()
Abstract
Multiple loop heat pipes which have two
evaporators and two condensers in one loop are a kind of active heat transfer
device. Since they have two evaporators and two condensers, the operating mode
also becomes multiple. This work discusses the cases that multiple loop heat
pipes were operated with one condenser at high temperature and the other at low
temperature. To avoid the high temperature returning liquid and keep the
multiple loop heat pipes work properly, the flow regulator which was made of polyethylene
was designed, fabricated and applied in this test. The effect of flow regulator
was confirmed and analyzed. In the test that large temperature difference
existed between two sinks, it can be found according to the result that the
flow regulator worked effectively and prevented the high temperature vapor to
enter the inlet of common liquid line, which can keep the evaporators and
returning liquid to operate at low temperature. With the increment of heat
loads and the temperature difference between two sinks, the pressure difference
between two condensers became larger and larger. When the pressure difference
was larger than the flow regulator’s capillary force, the flow regulator could
not work properly because the high temperature vapor began to flow through the
flow regulator. According to the test data, the flow regulator can work properly
within the sinks’ temperature 0°C/60°C and the two evaporators’ heat load
30/30 W.
Share and Cite:
Chang, X. and Nagano, H. (2014) Experimental Investigation on the Effection of Flow Regulator in a Multiple Evaporators/Condensers Loop Heat Pipe with Plastic Porous Structure.
Journal of Power and Energy Engineering,
2, 49-56. doi:
10.4236/jpee.2014.29008.
Conflicts of Interest
The authors declare no conflicts of interest.
References
[1]
|
Ku, J. (1999) Operating Characteristics of Loop Heat Pipes. 29th International Conference on Environmental System, Denver, 12-15 July 1999, No. 1999-01-2007.
|
[2]
|
Bienert Wolf, W.B., Nikitkin, M.N., Maydanik, Y.F., Fershtater, Y., Vershinin, S. and Gottschlich, J.M. (1997) The Proof-of-Feasibility of Multiple Evaporator Loop Heat Pipes. Sixth European Symposium on Space Environmental Control Systems, Noordwijk, 20-22 May 1997, 393-400.
|
[3]
|
Delil, A.A.M., Maydanik, Y.F., Chernyshova, M.A. and Pastukhov, V.G. (2003) Development and Test Results of a Multi-Evaporator-Condenser Loop Heat Pipe. AIP Conference Proceedings, 654.
|
[4]
|
Hoang, T.T. and Ku, J.T. (2004) Mathematical Modeling of Loop Heat Pipes With Multiple Capillary Pumps and Multiple Condensers. http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20040171388.pdf
|
[5]
|
Ku, J.T., Ottenstein, L. and Douglas, D. (2008) Multi-Evaporator Miniature Loop Heat Pipe for Small Spacecraft Thermal Control. 49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 7-10 April 2008.
|