{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/98780"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/98780","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Design and experimental study on pressure compensating emitters in drip irrigation","abstract":"This thesis aims to solve the basic physics behind the collapsible tube dripper design used in drip irrigation. A study was performed on the dynamics of the flow limitation of collapsible tubes. Two parameters were studied: outlet hole diameter and effective length. Prototypes were made varying these parameters, and flow tests were conducted to collect data on pressure and flow rate. Introducing a valve to control the flow significantly improved the control of experiments and the ability to test for pressure compensation. It was found that the outlet hole diameter is directly correlated with outlet flow rate and activation pressure, but indirectly correlated with constancy of flow rate. The impact of effective length on flow rate is still unclear but the results show that there is a possible correlation that may depend on other factors and characteristics of the flow.","abstract_html":"This thesis aims to solve the basic physics behind the collapsible tube dripper design used in drip irrigation. A study was performed on the dynamics of the flow limitation of collapsible tubes. Two parameters were studied: outlet hole diameter and effective length. Prototypes were made varying these parameters, and flow tests were conducted to collect data on pressure and flow rate. Introducing a valve to control the flow significantly improved the control of experiments and the ability to test for pressure compensation. It was found that the outlet hole diameter is directly correlated with outlet flow rate and activation pressure, but indirectly correlated with constancy of flow rate. The impact of effective length on flow rate is still unclear but the results show that there is a possible correlation that may depend on other factors and characteristics of the flow.","abstract_has_math":false,"creators":["Lin, Teresa (Teresa Ye)"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Department of Mechanical Engineering.","school":null,"contributors":[],"advisors":["Amos G. Winter, V."],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015","date_published":"2015","updated_at":"2026-07-22T22:22:27Z","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. See provided URL for inquiries about permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/98780","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Amos G. Winter, V."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. Department of Mechanical Engineering."]},{"key":"dc:contributor.other","label":"Dc Contributor Other","values":["Massachusetts Institute of Technology. Department of Mechanical Engineering."]},{"key":"dc:creator","label":"Author","values":["Lin, Teresa (Teresa Ye)"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2015-09-17T19:11:33Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2015-09-17T19:11:33Z"]},{"key":"dc:date.issued","label":"Date","values":["2015"]},{"key":"dc:publisher","label":"Institution","values":["Massachusetts Institute of Technology"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Mechanical Engineering."]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["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. See provided URL for inquiries about permission."]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://dspace.mit.edu/handle/1721.1/7582"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1721.1/98780"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.","Cataloged from PDF version of thesis.","Includes bibliographical references (page 118)."]},{"key":"dc:description.abstract","label":"Abstract","values":["This thesis aims to solve the basic physics behind the collapsible tube dripper design used in drip irrigation. A study was performed on the dynamics of the flow limitation of collapsible tubes. Two parameters were studied: outlet hole diameter and effective length. Prototypes were made varying these parameters, and flow tests were conducted to collect data on pressure and flow rate. Introducing a valve to control the flow significantly improved the control of experiments and the ability to test for pressure compensation. It was found that the outlet hole diameter is directly correlated with outlet flow rate and activation pressure, but indirectly correlated with constancy of flow rate. The impact of effective length on flow rate is still unclear but the results show that there is a possible correlation that may depend on other factors and characteristics of the flow."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.B."]},{"key":"dc:title","label":"Title","values":["Design and experimental study on pressure compensating emitters in drip irrigation"]}]}],"canonical_facts":{"dc:contributor.advisor":["Amos G. Winter, V."],"dc:contributor.department":["Massachusetts Institute of Technology. Department of Mechanical Engineering."],"dc:contributor.other":["Massachusetts Institute of Technology. Department of Mechanical Engineering."],"dc:creator":["Lin, Teresa (Teresa Ye)"],"dc:date.accessioned":["2015-09-17T19:11:33Z"],"dc:date.available":["2015-09-17T19:11:33Z"],"dc:date.issued":["2015"],"dc:description":["Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.","Cataloged from PDF version of thesis.","Includes bibliographical references (page 118)."],"dc:description.abstract":["This thesis aims to solve the basic physics behind the collapsible tube dripper design used in drip irrigation. A study was performed on the dynamics of the flow limitation of collapsible tubes. Two parameters were studied: outlet hole diameter and effective length. Prototypes were made varying these parameters, and flow tests were conducted to collect data on pressure and flow rate. Introducing a valve to control the flow significantly improved the control of experiments and the ability to test for pressure compensation. It was found that the outlet hole diameter is directly correlated with outlet flow rate and activation pressure, but indirectly correlated with constancy of flow rate. The impact of effective length on flow rate is still unclear but the results show that there is a possible correlation that may depend on other factors and characteristics of the flow."],"dc:description.degree":["S.B."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/98780"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc: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. See provided URL for inquiries about permission."],"dc:rights.uri":["http://dspace.mit.edu/handle/1721.1/7582"],"dc:subject":["Mechanical Engineering."],"dc:title":["Design and experimental study on pressure compensating emitters in drip irrigation"],"dc:type":["Thesis"]},"updated_at":"2026-07-22T22:22:27Z"}