Development and Test Results of a Multi-Evaporator-Condenser Loop Heat Pipe

Results are presented of the development and tests of a 1 m long ammonia ramified loop heat pipe, with two cylindrical evaporators (24 mm in diameter with an active zone length of 150 mm) and two condensers (length 200 mm, diameter 24 mm), made as pipe‐in‐pipe heat exchangers. Tests of the device at different orientations in 1‐g have shown that it can efficiently operate at symmetrical and non‐symmetrical heat load distributions between the evaporators, and also at different temperatures of the condensers cooling. The maximum total transport capacity is 1100–1400 W. Shutting down the active cooling of one condenser results in an abrupt decrease in the maximum transport capability of the device.