Heat Transfer in Evaporation Zone of Ammonia Aluminium Heat Pipes

Authors

DOI:

https://doi.org/10.20535/1810-0546.2017.1.82925

Keywords:

Aluminium grooved heat pipes, Capillary structure, Heat transfer intensity, Evaporation, Boiling, Space systems

Abstract

Background. There are no generalized correlations for the heat transfer intensity calculation in the evaporation zone of ammonia aluminum grooved heat pipe, which can be used in thermal stabilization systems of space satellites.

Objective. Development of calculation methods of the heat transfer coefficients in the evaporation zone of ammonia aluminium grooved heat pipes.

Methods. Experimental investigations, analysis and generalization of experimental data of heat transfer intensity in the evaporation zone of ammonia aluminum heat pipes, which were developed and manufactured in Igor Sikorsky KPI.

Results. Generalized formulas allow calculating heat transfer coefficients in the evaporation zone of ammonia aluminum heat pipes with outside diameters of 10.0, 12.5, 14.0 and 17.0 mm with the W-shaped longitudinal axial grooves in the heat flux density range of 0.1 to 7.0 W/cm2.

Conclusions. The experimental data were obtained with accuracy of correlation ±20 % with the calculated data in accordance with the proposed formulas.

Author Biographies

Eugene Pis'mennyi, Igor Sikorsky Kyiv Polytechnic Institute

Prof., Heat-and-Power engineering Department

Sergii Khairnasov, Igor Sikorsky Kyiv Polytechnic Institute

Senior researcher; Heat Pipes Laboratory

Boris Rassamakin, Igor Sikorsky Kyiv Polytechnic Institute

Senior researcher; Heat Pipes Laboratory

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Published

2017-03-01

Issue

No. 1 (2017): Engineering

Section

Art

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