Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7046491 | Applied Thermal Engineering | 2018 | 10 Pages |
Abstract
Loop heat pipes (LHPs) are passive heat-transfer devices which may be used in energy-efficient systems of recovery of low-potential heat, for heat transfer from renewable energy sources, and also in systems of thermal regulation of different equipment with remote heat sinks or sources. The paper shows the results of development and thermal tests of an LHP 21â¯m long made of stainless steel with ammonia as a working fluid. The device had a cylindrical evaporator 24â¯mm in diameter with an active zone length of 188â¯mm equipped with a nickel wick with an effective pore radius of 1.05â¯Âµm and a porosity of 70%. The LHP condenser made in the form of a pipe-in-pipe heat exchanger 310â¯mm long was cooled by running water with a temperature of 4â¯Â°C and 20â¯Â°C. Tests were conducted at a horizontal orientation of the device. At a cooling temperature of 20â¯Â°C a maximum heat load of 1700â¯W (12â¯W/cm2) was achieved at a vapor temperature of 62â¯Â°C, which corresponded to a heat source temperature of 89â¯Â°C. In this case the thermal resistance of the “heat source - cooling liquid” system was equal to 0.034â¯Â°C/W.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Y. Maydanik, V. Pastukhov, M. Chernysheva,