{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/74985"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/74985","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Design, fabrication, and characterization of a multi-condenser loop heat pipe","abstract":"A condenser design was characterized for a multi-condenser loop heat pipe (LHP) capable of dissipating 1000 W. The LHP was designed for integration into a high performance aircooled heat sink to address thermal management challenges in advanced electronic systems. The multi-layer stack of condensers utilizes a sintered wick design to stabilize the liquidvapor interface and prevent liquid flooding of the lower condenser layers in the presence of a gravitational head. In addition a liquid subcooler was incorporated to suppress vapor flashing in the liquid return line. The condensers were fabricated using photo-chemically etched Monel frames with Monel sintered wicks with particle sizes up to 44 pm. The performance of the condensers was characterized in a custom experimental flow rig that monitored the pressure and temperatures of the vapor and liquid. Two condensers arranged in parallel were demonstrated to dissipate the required heat load while maintaining a stable liquidvapor interface with differences in liquid and vapor side pressures in excess of 6.2 kPa. The experimental results defined the stable operating limits of multiple condensers within a LHP given a range of convective heat transfer coefficients and differences in liquid and vapor side pressures. The inclusion of a wicking element in the condenser of the LHP increases the flexibility in design by allowing a modular construction with multiple condensers which can be integrated into air-cooled heat exchangers to cool devices with high power density.","abstract_html":"A condenser design was characterized for a multi-condenser loop heat pipe (LHP) capable of dissipating 1000 W. The LHP was designed for integration into a high performance aircooled heat sink to address thermal management challenges in advanced electronic systems. The multi-layer stack of condensers utilizes a sintered wick design to stabilize the liquidvapor interface and prevent liquid flooding of the lower condenser layers in the presence of a gravitational head. In addition a liquid subcooler was incorporated to suppress vapor flashing in the liquid return line. The condensers were fabricated using photo-chemically etched Monel frames with Monel sintered wicks with particle sizes up to 44 pm. The performance of the condensers was characterized in a custom experimental flow rig that monitored the pressure and temperatures of the vapor and liquid. Two condensers arranged in parallel were demonstrated to dissipate the required heat load while maintaining a stable liquidvapor interface with differences in liquid and vapor side pressures in excess of 6.2 kPa. The experimental results defined the stable operating limits of multiple condensers within a LHP given a range of convective heat transfer coefficients and differences in liquid and vapor side pressures. The inclusion of a wicking element in the condenser of the LHP increases the flexibility in design by allowing a modular construction with multiple condensers which can be integrated into air-cooled heat exchangers to cool devices with high power density.","abstract_has_math":false,"creators":["Hanks, Daniel Frank"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Mechanical Engineering.","school":null,"contributors":[],"advisors":["Evelyn N Wang."],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012","date_published":"2012","updated_at":"2026-07-22T22:21:44Z","subjects":["Mechanical Engineering."],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. 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The LHP was designed for integration into a high performance aircooled heat sink to address thermal management challenges in advanced electronic systems. The multi-layer stack of condensers utilizes a sintered wick design to stabilize the liquidvapor interface and prevent liquid flooding of the lower condenser layers in the presence of a gravitational head. In addition a liquid subcooler was incorporated to suppress vapor flashing in the liquid return line. The condensers were fabricated using photo-chemically etched Monel frames with Monel sintered wicks with particle sizes up to 44 pm. The performance of the condensers was characterized in a custom experimental flow rig that monitored the pressure and temperatures of the vapor and liquid. Two condensers arranged in parallel were demonstrated to dissipate the required heat load while maintaining a stable liquidvapor interface with differences in liquid and vapor side pressures in excess of 6.2 kPa. The experimental results defined the stable operating limits of multiple condensers within a LHP given a range of convective heat transfer coefficients and differences in liquid and vapor side pressures. The inclusion of a wicking element in the condenser of the LHP increases the flexibility in design by allowing a modular construction with multiple condensers which can be integrated into air-cooled heat exchangers to cool devices with high power density."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.M."]},{"key":"dc:title","label":"Title","values":["Design, fabrication, and characterization of a multi-condenser loop heat pipe"]}]}],"canonical_facts":{"dc:contributor.advisor":["Evelyn N Wang."],"dc:contributor.department":["Massachusetts Institute of Technology. Dept. of Mechanical Engineering."],"dc:contributor.other":["Massachusetts Institute of Technology. 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The condensers were fabricated using photo-chemically etched Monel frames with Monel sintered wicks with particle sizes up to 44 pm. The performance of the condensers was characterized in a custom experimental flow rig that monitored the pressure and temperatures of the vapor and liquid. Two condensers arranged in parallel were demonstrated to dissipate the required heat load while maintaining a stable liquidvapor interface with differences in liquid and vapor side pressures in excess of 6.2 kPa. The experimental results defined the stable operating limits of multiple condensers within a LHP given a range of convective heat transfer coefficients and differences in liquid and vapor side pressures. 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