Water Heat Pipe Radiator Trade Study for the 300–550 K Temperature Range

Abstract

A heat pipe radiator trade study has been completed for radiators in the 300–550 K temperature range. Initially, a thorough component level study was completed to determine heat pipe operating properties over the temperature range, particularly at the high end where the Merit Number starts fall off. Heat pipe designs for different dimensions were developed, and the maximum heat pipe power was determined. A trade study was then conducted that varied heat pipe O.D., evaporator length, heat pipe length, temperature, heat pipe spacing, fin thickness, and fin thermal conductivity. The radiator design that maximized specific power is shown, as well as the variation in mass with heat pipe spacing.