{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/108495"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/108495","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A quasi-steady modeling approach of a heat pump water heater system with experimental validation and analysis","abstract":"In a heat pump water heater system, the dynamic interdependence between the vapor compression system and the water in the storage tank poses a modeling challenge for steady-state refrigeration system models. The aim of this project is to develop a model and methodology for coupling steady-state vapor compression system modeling with a dynamic condenser cooling medium. Consequently, a quasi-steady transient model is developed involving a steady-state vapor compression system model in Engineering Equation Solver (EES) and a computational fluid dynamics (CFD) model in ANSYS Fluent for simulating the heat transfer and fluid dynamics in the water tank. The respective models are connected at the interface of the tank wall and the water in the storage tank. The linked modeling process, described in the manuscript, involves iteration between the CFD model of the water tank and the vapor compression system model around a quasi-steady warm up of a heat pump water heating system. The model is developed around a physical heat pump water heater system. An experimental investigation is also conducted to aid with model validation.","abstract_html":"In a heat pump water heater system, the dynamic interdependence between the vapor compression system and the water in the storage tank poses a modeling challenge for steady-state refrigeration system models. The aim of this project is to develop a model and methodology for coupling steady-state vapor compression system modeling with a dynamic condenser cooling medium. Consequently, a quasi-steady transient model is developed involving a steady-state vapor compression system model in Engineering Equation Solver (EES) and a computational fluid dynamics (CFD) model in ANSYS Fluent for simulating the heat transfer and fluid dynamics in the water tank. The respective models are connected at the interface of the tank wall and the water in the storage tank. The linked modeling process, described in the manuscript, involves iteration between the CFD model of the water tank and the vapor compression system model around a quasi-steady warm up of a heat pump water heating system. The model is developed around a physical heat pump water heater system. An experimental investigation is also conducted to aid with model validation.","abstract_has_math":false,"creators":["Shah, Tejas"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Hrnjak, Predrag S"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2020,"date_issued":"2020-10-07T20:59:53Z","date_published":"2020-10-07T20:59:53Z","updated_at":"2026-07-22T22:24:48Z","subjects":["Heat Transfer","Fluid Dynamics","Modeling","Simulation","Computational Fluid Dynamics","CFD","Vapor Compression Refrigeration Systems","Heat Exchangers"],"languages":["en"],"rights":["Copyright 2020 Tejas Shah"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/108495","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Hrnjak, Predrag S"]},{"key":"dc:creator","label":"Author","values":["Shah, Tejas"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2020-10-07T20:59:53Z","2020-07-22","2020-08"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"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":["Heat Transfer","Fluid Dynamics","Modeling","Simulation","Computational Fluid Dynamics","CFD","Vapor Compression Refrigeration Systems","Heat Exchangers"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2020 Tejas Shah"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/108495"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["In a heat pump water heater system, the dynamic interdependence between the vapor compression system and the water in the storage tank poses a modeling challenge for steady-state refrigeration system models. The aim of this project is to develop a model and methodology for coupling steady-state vapor compression system modeling with a dynamic condenser cooling medium. Consequently, a quasi-steady transient model is developed involving a steady-state vapor compression system model in Engineering Equation Solver (EES) and a computational fluid dynamics (CFD) model in ANSYS Fluent for simulating the heat transfer and fluid dynamics in the water tank. The respective models are connected at the interface of the tank wall and the water in the storage tank. The linked modeling process, described in the manuscript, involves iteration between the CFD model of the water tank and the vapor compression system model around a quasi-steady warm up of a heat pump water heating system. The model is developed around a physical heat pump water heater system. An experimental investigation is also conducted to aid with model validation.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2020-10-02 without embargo terms","The student, Tejas Shah, accepted the attached license on 2020-07-14 at 19:15.","The student, Tejas Shah, submitted this Thesis for approval on 2020-07-14 at 20:40.","This Thesis was approved for publication on 2020-07-22 at 10:52.","DSpace SAF Submission Ingestion Package generated from Vireo submission #15619 on 2020-10-02 at 15:13:48","Made available in DSpace on 2020-10-07T20:59:53Z (GMT). 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Consequently, a quasi-steady transient model is developed involving a steady-state vapor compression system model in Engineering Equation Solver (EES) and a computational fluid dynamics (CFD) model in ANSYS Fluent for simulating the heat transfer and fluid dynamics in the water tank. The respective models are connected at the interface of the tank wall and the water in the storage tank. The linked modeling process, described in the manuscript, involves iteration between the CFD model of the water tank and the vapor compression system model around a quasi-steady warm up of a heat pump water heating system. The model is developed around a physical heat pump water heater system. An experimental investigation is also conducted to aid with model validation.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2020-10-02 without embargo terms","The student, Tejas Shah, accepted the attached license on 2020-07-14 at 19:15.","The student, Tejas Shah, submitted this Thesis for approval on 2020-07-14 at 20:40.","This Thesis was approved for publication on 2020-07-22 at 10:52.","DSpace SAF Submission Ingestion Package generated from Vireo submission #15619 on 2020-10-02 at 15:13:48","Made available in DSpace on 2020-10-07T20:59:53Z (GMT). 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