Analysis of the thermal performance of heat pipe radiators
Abstract
A comprehensive mathematical model and computational methodology are presented to obtain numerical solutions for the transient behavior of a heat pipe radiator in a space environment. The modeling is focused on a typical radiator panel having a long heat pipe at the center and two extended surfaces attached to opposing sides of the heat pipe shell in the condenser section. In the set of governing equations developed for the model, each region of the heat pipe  shell, liquid, and vapor  is thermally lumped to the extent possible, while the fin is lumped only in the direction normal to its surface. Convection is considered to be the only significant heat transfer mode in the vapor, and the evaporation and condensation velocity at the liquidvapor interface is calculated from kinetic theory. A finitedifference numerical technique is used to predict the transient behavior of the entire radiator in response to changing loads.
 Publication:

Heat Transfer in Space Systems; Proceedings of the Symposium, AIAA/ASME Thermophysics and Heat Transfer Conference
 Pub Date:
 January 1990
 Bibcode:
 1990asme.conf...25B
 Keywords:

 Heat Pipes;
 Heat Radiators;
 Performance Tests;
 Thermal Analysis;
 Aerospace Environments;
 Heat Transfer;
 Mathematical Models;
 Fluid Mechanics and Heat Transfer