Feasibility Study on Thermal Management System Using Two-phase Fluid Flow for Laser Type Space Solar Power System

Int. J. Microgravity Sci. Appl. 2007p261
Author
M. ANDO, H. OHTA, A. OKAMOTO and H. KAWASAKI
Organization
Kyushu University, Japan Aerospace Exploration Agency
Abstract
In recent years, feasibility of Space Solar Power System (SSPS) was examined from various aspects. Thermal management of SSPS is one of the most serious problems because of the generation of a great amount of waste heat at high heat flux density for both systems of microwave SSPS and laser SSPS. Removal and transportation of such waste heat can be realized by using two-phase fluid flow for thermal management system of SSPS. Two-phase fluid flow is a promising method to transport a large amount of thermal energy because it accompanies the transportation of latent heat of vaporization. To realize the cooling of the laser medium, heat flux at the cooling surface should be lower than the critical heat flux determined by the fluid and flow conditions. Also, temperature of the system should be maintained at allowable level. The paper studies the feasibility for thermal management system of bulk laser type SSPS simulating the cooling process by two-phase fluid flow of water and FC72. To increase the critical heat flux on a large heat transfer surface, a new structure of narrow channel is devised and its performance is tested.
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