variavel0=<b>Roger R. Riehl</b> - rriehl@cet.ufsc.br Universidade Federal de Santa Catarina
<b>Edson Bazzo</b> - ebazzo@emc.ufsc.br Universidade Federal de Santa Catarina
<b>Abstract.</b> Focusing on the continuous growing of satellite and structures thermal control using capillary driven two-phase loops, this paper presents an experimental investigation of a capillary driven two-phase loop, configured on a capillary pumped loop (CPL) mode. Tests were performed with an internally grooved evaporator with a hollow polyethylene porous structure using acetone and anhydrous ammonia as working fluids. For a range of power applied to the evaporator, the system presented reliable start-ups and continuous operation for several hours for each working fluid. Comparing the operation of the CPL using two different working fluids, the system showed a better heat transport capability when anhydrous ammonia was used. The capillary evaporator depriming and re-priming was also experimentally investigated, which showed that the proposed CPL configuration is able to handle the porous structure dryout and promote its rewetting without major external interference.
<b>Keywords.</b> capillary pumped loop, thermal control, meniscus, two-phase flow.