Abstract
The thermal and fluid mechanical properties of an evaporative capillary pump are described by means of characteristics that have been determined by tests. The capillary pump, which has been newly designed for an application in future space projects, serves a double function as the heat absorbing element in a closed loop as well as a pump circulating the working fluid. The working fluids used were CCI3F (freon R11) and liquid anhydrous ammonia. The paper describes the associated heat and mass transport in the capillary pump, and the physical process of the capillary pumping is explained. Furthermore, a model is introduced which explains the boiling heat transfer in the porous structure of the capillary pump.
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