Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability
A Master of Science thesis in Mechanical Engineering by Kareem Morsi entitled, “Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability”, submitted in October 2025. Thesis advisor is Dr. Moham...
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| Format: | doctoralThesis |
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2025
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| Online Access: | https://hdl.handle.net/11073/32534 |
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| _version_ | 1864513434126647296 |
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| author | Morsi, Kareem |
| author_facet | Morsi, Kareem |
| author_role | author |
| dc.contributor.none.fl_str_mv | Hamdan, Mohammad Abu-Nabah, Bassam |
| dc.creator.none.fl_str_mv | Morsi, Kareem |
| dc.date.none.fl_str_mv | 2025-12-08T08:07:58Z 2025-12-08T08:07:58Z 2025-10 |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | 35.232-2025.40 https://hdl.handle.net/11073/32534 |
| dc.language.none.fl_str_mv | en_US |
| dc.relation.none.fl_str_mv | Master of Science in Mechanical Engineering (MSME) |
| dc.subject.none.fl_str_mv | Passive cooling Heat sink Phase change material Metal foam Heat pipes Loop heat pipe Flat evaporator Capillary pumping Thermal resistance Filling ratio Wick structure Pore size Wick material Orientation effects Electronics cooling High heat flux Thermal management Renewable energy systems Aerospace cooling applications |
| dc.title.none.fl_str_mv | Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability |
| dc.type.none.fl_str_mv | info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/doctoralThesis |
| description | A Master of Science thesis in Mechanical Engineering by Kareem Morsi entitled, “Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability”, submitted in October 2025. Thesis advisor is Dr. Mohammad O. Hamdan and thesis co-advisor is Dr. Bassam Abu Nabah. Soft copy is available (Thesis, Completion Certificate, Approval Signatures, and AUS Archives Consent Form). |
| format | doctoralThesis |
| id | aus_991326dde2827b3dbc4e8382ed19257a |
| identifier_str_mv | 35.232-2025.40 |
| language_invalid_str_mv | en_US |
| network_acronym_str | aus |
| network_name_str | aus |
| oai_identifier_str | oai:repository.aus.edu:11073/32534 |
| publishDate | 2025 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and SustainabilityMorsi, KareemPassive coolingHeat sinkPhase change materialMetal foamHeat pipesLoop heat pipeFlat evaporatorCapillary pumpingThermal resistanceFilling ratioWick structurePore sizeWick materialOrientation effectsElectronics coolingHigh heat fluxThermal managementRenewable energy systemsAerospace cooling applicationsA Master of Science thesis in Mechanical Engineering by Kareem Morsi entitled, “Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability”, submitted in October 2025. Thesis advisor is Dr. Mohammad O. Hamdan and thesis co-advisor is Dr. Bassam Abu Nabah. Soft copy is available (Thesis, Completion Certificate, Approval Signatures, and AUS Archives Consent Form).Reliable thermal management remains a critical challenge in compact, moderate-to-high-flux electronic systems, where conventional cooling methods often fail to ensure efficiency and orientation independence. This thesis experimentally investigates two classes of thermal management solutions: (i) Part A: hybrid heat sinks that integrate multiple passive techniques, including fins, phase change materials (PCMs), metal foams, and heat pipes, and (ii) Part B: a flat-evaporator loop heat pipe (LHP).In Part A, eight hybrid sink configurations were tested under heat fluxes of 1000–2000 W/m². PCM-based designs provided effective thermal buffering but suffered from low conductivity. Incorporating metal foam improved melt uniformity, and heat pipes enabled rapid heat spreading. The highest performance was achieved with the combined PCM–foam–heat pipe arrangement, although operating temperatures remained higher than those achieved with the LHP. In Part B, a custom flat-evaporator LHP was fabricated and evaluated up to 23 kW/m² while varying filling ratio, wick pore size, wick material, and orientation. At the lowest flux tested (1000 W/m²), the evaporator stabilized near the expected saturation temperature of water at reduced pressures (~32-36 °C). With increasing heat flux, evaporator temperatures rose significantly, with the evaporator-to-condenser temperature difference of approximately 4 °C at low fluxes and about 25 °C at higher loads. Optimal performance was observed at 55–60% filling ratios and ~5 μm pore size. Polytetrafluoroethylene (PTFE) wicks excelled at low fluxes due to high porosity and wettability, whereas stainless steel wicks performed better at high heat fluxes due to their superior thermal conductivity. Gravity-assisted orientations reduced evaporator-to-condenser temperature difference, whereas adverse orientations-imposed performance penalties but maintained system stability. The findings confirm that, while hybrid heat sinks offer incremental benefits, the LHP provides a superior and scalable solution for high-flux electronics and aerospace applications.College of EngineeringDepartment of Mechanical EngineeringMaster of Science in Mechanical Engineering (MSME)Hamdan, MohammadAbu-Nabah, Bassam2025-12-08T08:07:58Z2025-12-08T08:07:58Z2025-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdf35.232-2025.40https://hdl.handle.net/11073/32534en_USMaster of Science in Mechanical Engineering (MSME)oai:repository.aus.edu:11073/325342025-12-08T11:43:12Z |
| spellingShingle | Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability Morsi, Kareem Passive cooling Heat sink Phase change material Metal foam Heat pipes Loop heat pipe Flat evaporator Capillary pumping Thermal resistance Filling ratio Wick structure Pore size Wick material Orientation effects Electronics cooling High heat flux Thermal management Renewable energy systems Aerospace cooling applications |
| status_str | publishedVersion |
| title | Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability |
| title_full | Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability |
| title_fullStr | Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability |
| title_full_unstemmed | Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability |
| title_short | Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability |
| title_sort | Thermal Management System Optimization for Electronics Using Loop Heat Pipe, Guided by Hybrid Heat-Sink Benchmarks, to Enhance Energy Efficiency and Sustainability |
| topic | Passive cooling Heat sink Phase change material Metal foam Heat pipes Loop heat pipe Flat evaporator Capillary pumping Thermal resistance Filling ratio Wick structure Pore size Wick material Orientation effects Electronics cooling High heat flux Thermal management Renewable energy systems Aerospace cooling applications |
| url | https://hdl.handle.net/11073/32534 |