{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/101827"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/101827","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Improved braze joint quality through use of enhanced surface technologies","abstract":"Heating, ventilation and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort with the goal to provide thermal comfort and acceptable indoor air quality. The US HVAC market is currently worth $57 billion and refrigerant leakage is one of the major causes for concern in the current era of the market. The primary goal of this project is to reduce braze joint refrigerant leaks by 25% which would reduce the annual unitary rooftop leak rate of 4% to 3%. Though the goal of braze joint leak reduction is a noble one, the realities of business do necessitate that the brazing advancement comes at a cost that is equal to or better than today's brazing techniques leading up to the second goal for this project, to utilize the microengineered surface structures to decrease the amount of braze alloy and flux materials required for brazing by 10%. In this project, early results have shown reduction in braze joint leaks by 38% thereby equating to a saving of $1.78 billion dollars of US energy consumption bills per year if implemented. While still in the testing phase, the 10% reduction in alloy and flux material consumption could save the funding company, Trane INC a total of $300,000 per year.","abstract_html":"Heating, ventilation and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort with the goal to provide thermal comfort and acceptable indoor air quality. The US HVAC market is currently worth $57 billion and refrigerant leakage is one of the major causes for concern in the current era of the market. The primary goal of this project is to reduce braze joint refrigerant leaks by 25% which would reduce the annual unitary rooftop leak rate of 4% to 3%. Though the goal of braze joint leak reduction is a noble one, the realities of business do necessitate that the brazing advancement comes at a cost that is equal to or better than today's brazing techniques leading up to the second goal for this project, to utilize the microengineered surface structures to decrease the amount of braze alloy and flux materials required for brazing by 10%. In this project, early results have shown reduction in braze joint leaks by 38% thereby equating to a saving of $1.78 billion dollars of US energy consumption bills per year if implemented. While still in the testing phase, the 10% reduction in alloy and flux material consumption could save the funding company, Trane INC a total of $300,000 per year.","abstract_has_math":true,"creators":["Gunnam, Hanmesh"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Miljkovic, Nenad"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-09-27T16:47:36Z","date_published":"2018-09-27T16:47:36Z","updated_at":"2026-07-22T22:24:40Z","subjects":["Brazephilic","Brazephobic","Nanostructured","Brazing"],"languages":["en"],"rights":["Copyright 2018 Hanmesh Gunnam"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/101827","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Miljkovic, Nenad"]},{"key":"dc:creator","label":"Author","values":["Gunnam, Hanmesh"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-09-27T16:47:36Z","2020-09-28T09:15:22Z","2018-07-18","2018-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Brazephilic","Brazephobic","Nanostructured","Brazing"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2018 Hanmesh Gunnam"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/101827"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Heating, ventilation and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort with the goal to provide thermal comfort and acceptable indoor air quality. The US HVAC market is currently worth $57 billion and refrigerant leakage is one of the major causes for concern in the current era of the market. The primary goal of this project is to reduce braze joint refrigerant leaks by 25% which would reduce the annual unitary rooftop leak rate of 4% to 3%. Though the goal of braze joint leak reduction is a noble one, the realities of business do necessitate that the brazing advancement comes at a cost that is equal to or better than today's brazing techniques leading up to the second goal for this project, to utilize the microengineered surface structures to decrease the amount of braze alloy and flux materials required for brazing by 10%. In this project, early results have shown reduction in braze joint leaks by 38% thereby equating to a saving of $1.78 billion dollars of US energy consumption bills per year if implemented. While still in the testing phase, the 10% reduction in alloy and flux material consumption could save the funding company, Trane INC a total of $300,000 per year.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-08-01","The student, Hanmesh Gunnam, accepted the attached license on 2018-07-17 at 12:46.","The student, Hanmesh Gunnam, submitted this Thesis for approval on 2018-07-17 at 13:06.","This Thesis was approved for publication on 2018-07-18 at 09:11.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12900 on 2018-09-27 at 11:37:33","Made available in DSpace on 2018-09-27T16:47:36Z (GMT). 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The US HVAC market is currently worth $57 billion and refrigerant leakage is one of the major causes for concern in the current era of the market. The primary goal of this project is to reduce braze joint refrigerant leaks by 25% which would reduce the annual unitary rooftop leak rate of 4% to 3%. Though the goal of braze joint leak reduction is a noble one, the realities of business do necessitate that the brazing advancement comes at a cost that is equal to or better than today's brazing techniques leading up to the second goal for this project, to utilize the microengineered surface structures to decrease the amount of braze alloy and flux materials required for brazing by 10%. In this project, early results have shown reduction in braze joint leaks by 38% thereby equating to a saving of $1.78 billion dollars of US energy consumption bills per year if implemented. While still in the testing phase, the 10% reduction in alloy and flux material consumption could save the funding company, Trane INC a total of $300,000 per year.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-08-01","The student, Hanmesh Gunnam, accepted the attached license on 2018-07-17 at 12:46.","The student, Hanmesh Gunnam, submitted this Thesis for approval on 2018-07-17 at 13:06.","This Thesis was approved for publication on 2018-07-18 at 09:11.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12900 on 2018-09-27 at 11:37:33","Made available in DSpace on 2018-09-27T16:47:36Z (GMT). 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