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Proceedings Papers

Parametric Analysis of a Thermally Actuated Cooling System for Space Applications

K. Freudenberg, W. E. Lear, S. A. Sherif
Proc. ASME. IMECE2000, Advanced Energy Systems, 499-510, November 5–10, 2000
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2000-1345
https://doi.org/10.1115/IMECE2000-1345
View Paper titled, Parametric Analysis of a Thermally Actuated Cooling System for Space Applications
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Topics: Cooling systems, Cycles, Design, Engineering prototypes, Heat, Heat pumps, Refrigeration, Thermal management, Weight (Mass)
Proceedings Papers

Semi-Closed Gas Turbine Cycles: An Ecological Solution

A. L. Laganelli, C. Rodgers, W. E. Lear, P. L. Meitner
Proc. ASME. GT2001, Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V002T04A029, June 4–7, 2001
Publisher: American Society of Mechanical Engineers
Paper No: 2001-GT-0558
https://doi.org/10.1115/2001-GT-0558
View Paper titled, Semi-Closed Gas Turbine Cycles: An Ecological Solution
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Topics: Cycles, Gas turbines, Engines, Climate change, Emissions, Gases, Carbon dioxide, Combustion, Combustion chambers, Computational fluid dynamics
Journal Articles

Numerical Simulation of Saturated Flow Boiling Heat Transfer of Ammonia/Water Mixture in Bubble Pumps for Absorption–Diffusion Refrigerators

Soo W. Jo, S. A. Sherif, W. E. Lear
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. March 2014, 6(1): 011007.
Paper No: TSEA-13-1067
https://doi.org/10.1115/1.4025091
Published Online: October 21, 2013
View Article titled, Numerical Simulation of Saturated Flow Boiling Heat Transfer of Ammonia/Water Mixture in Bubble Pumps for Absorption–Diffusion Refrigerators
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Topics: Boiling, Bubbles, Computer simulation, Flow (Dynamics), Pumps, Water, Heat transfer, Absorption, Diffusion (Physics), Simulation
Journal Articles

Critique and Improvement of a One-Dimensional Semianalytical Model of a Direct Methanol Fuel Cell

C. C. Kuo, W. E. Lear, J. H. Fletcher, O. D. Crisalle
Journal: Journal of Electrochemical Energy Conversion and Storage
Publisher: ASME
Article Type: Technical Briefs
J. Electrochem. En. Conv. Stor. October 2012, 9(5): 054501.
https://doi.org/10.1115/1.4006842
Published Online: August 17, 2012
View Article titled, Critique and Improvement of a One-Dimensional Semianalytical Model of a Direct Methanol Fuel Cell
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Topics: Boundary-value problems, Current density, Direct methanol fuel cells, Methanol, Modeling, Polarization (Electricity), Polarization (Light), Polarization (Waves), Electrical conductivity, Thermal conductivity
Proceedings Papers

Water Crossover Experiments in an Open-Cathode Direct Methanol Fuel Cell

C. C. Kuo, L. M. Neal, O. D. Crisalle, W. E. Lear, J. H. Fletcher
Proc. ASME. FUELCELL2011, ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology, 745-755, August 7–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: FuelCell2011-54674
https://doi.org/10.1115/FuelCell2011-54674
View Paper titled, Water Crossover Experiments in an Open-Cathode Direct Methanol Fuel Cell
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Topics: Direct methanol fuel cells, Water, Water reuse, Design, Methanol, Water vapor, Carbon dioxide, Current density, Diffusion (Physics), Sensors
Proceedings Papers

Numerical Simulation of Thermofluid Characteristics of Two-Phase Slug Flow in Microchannels

A. Mehdizadeh, S. A. Sherif, W. E. Lear
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 6, 253-262, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-23282
https://doi.org/10.1115/IHTC14-23282
View Paper titled, Numerical Simulation of Thermofluid Characteristics of Two-Phase Slug Flow in Microchannels
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Topics: Computer simulation, Microchannels, Slug flows, Thermofluids, Flow (Dynamics), Heat transfer, Convection, Bubbles, Engineering simulation, Fluids
Journal Articles

Life Cycle Cost Analysis of a Novel Cooling and Power Gas Turbine Engine

Vaibhav Malhotra, W. E. Lear, J. R. Khan, S. A. Sherif
Journal: Journal of Energy Resources Technology
Publisher: ASME
Article Type: Research Papers
J. Energy Resour. Technol. December 2010, 132(4): 042401.
https://doi.org/10.1115/1.4003075
Published Online: December 17, 2010
View Article titled, Life Cycle Cost Analysis of a Novel Cooling and Power Gas Turbine Engine
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Topics: Compressors, Cooling, Cycles, Design, Engines, Gas turbines, Heat, High pressure (Physics), Life cycle costing, Microturbines
Proceedings Papers

CFD Modeling of Two-Phase Gas-Liquid Slug Flow Using VOF Method in Microchannels

A. Mehdizadeh, S. A. Sherif, W. E. Lear
Proc. ASME. FEDSM2009, Volume 1: Symposia, Parts A, B and C, 693-703, August 2–6, 2009
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2009-78438
https://doi.org/10.1115/FEDSM2009-78438
View Paper titled, CFD Modeling of Two-Phase Gas-Liquid Slug Flow Using VOF Method in Microchannels
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Topics: Computational fluid dynamics, Fluids, Microchannels, Modeling, Slug flows
Proceedings Papers

Development and Testing of a Rotary-Vane Two-Phase Refrigerating Expander

A. M. Mahmoud, S. A. Sherif, W. E. Lear
Proc. ASME. IMECE2009, Volume 6: Emerging Technologies: Alternative Energy Systems; Energy Systems: Analysis, Thermodynamics and Sustainability, 355-365, November 13–19, 2009
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2009-13234
https://doi.org/10.1115/IMECE2009-13234
View Paper titled, Development and Testing of a Rotary-Vane Two-Phase Refrigerating Expander
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Topics: Testing, Design, Compression, Compressors, Displacement, Engines, Friction, Leakage, Machinery, Motors
Journal Articles

Frictional and Internal Leakage Losses in Rotary-Vane Two-Phase Refrigerating Expanders

Ahmad M. Mahmoud, S. A. Sherif, W. E. Lear
Journal: Journal of Energy Resources Technology
Publisher: ASME
Article Type: Research Papers
J. Energy Resour. Technol. June 2010, 132(2): 021007.
https://doi.org/10.1115/1.4001571
Published Online: June 11, 2010
View Article titled, Frictional and Internal Leakage Losses in Rotary-Vane Two-Phase Refrigerating Expanders
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Topics: Leakage, Rotors, Flow (Dynamics), Pressure, Stators
Proceedings Papers

Numerical Simulation of Two-Phase Slug Flows in Microchannels

A. Mehdizadeh, S. A. Sherif, W. E. Lear
Proc. ASME. HT2009, Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer, 245-252, July 19–23, 2009
Publisher: American Society of Mechanical Engineers
Paper No: HT2009-88126
https://doi.org/10.1115/HT2009-88126
View Paper titled, Numerical Simulation of Two-Phase Slug Flows in Microchannels
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Topics: Computational fluid dynamics, Computer simulation, Fluids, Microchannels, Slug flows, Surface tension
Proceedings Papers

Design of a Novel Quad-Generation Distributed Energy Demonstration Plant

D. R. Tiffany, W. E. Lear, M. A. Harris, J. F. Crittenden
Proc. ASME. GT2009, Volume 5: Microturbines and Small Turbomachinery; Oil and Gas Applications, 311-318, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-60312
https://doi.org/10.1115/GT2009-60312
View Paper titled, Design of a Novel Quad-Generation Distributed Energy Demonstration Plant
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Topics: Design, Distributed power generation, Cycles, Fuels, Water, Combustion, Modeling, Refrigeration, Air conditioning, Collaboration
Proceedings Papers

Fischer-Tropsch Fuel Characterization via Microturbine Testing and Fundamental Combustion Measurements

A. Srinivasan, B. Ellis, J. F. Crittenden, W. E. Lear, Brandon Rotavera, Eric L. Petersen
Proc. ASME. GT2008, Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Manufacturing, Materials and Metallurgy; Microturbines and Small Turbomachinery, 867-876, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-51447
https://doi.org/10.1115/GT2008-51447
View Paper titled, Fischer-Tropsch Fuel Characterization via Microturbine Testing and Fundamental Combustion Measurements
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Topics: Combustion, Fuels, Microturbines, Testing, Shock tubes, Emissions, Soot, Jet fuels, Sprays, Synthetic fuels
Proceedings Papers

Parametric Control of a Two-Phase Thermal Management System for Space Applications

M. J. Brooks, L. C. Nortje, W. E. Lear, S. A. Sherif
Proc. ASME. HT2008, Heat Transfer: Volume 2, 363-370, August 10–14, 2008
Publisher: American Society of Mechanical Engineers
Paper No: HT2008-56147
https://doi.org/10.1115/HT2008-56147
View Paper titled, Parametric Control of a Two-Phase Thermal Management System for Space Applications
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Topics: Algorithms, Boilers, Electrical components, Flow control valves, Fluids, Heat, Pressure, Space vehicles, Thermal management, Waste heat
Proceedings Papers

An Analytical and Experimental Study of Rotary-Vane Turbomachinery: Single-Phase Working Fluids

A. Mehdizadeh, A. M. Mahmoud, S. A. Sherif, W. E. Lear
Proc. ASME. FEDSM2008, Volume 2: Fora, 235-242, August 10–14, 2008
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2008-55260
https://doi.org/10.1115/FEDSM2008-55260
View Paper titled, An Analytical and Experimental Study of Rotary-Vane Turbomachinery: Single-Phase Working Fluids
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Topics: Fluids, Turbomachinery, Machinery, Design, Flow (Dynamics), Motors, Compression, Displacement, Exhaust systems, Refrigeration
Proceedings Papers

Frictional and Internal Leakage Losses in Rotary-Vane Two-Phase Refrigerating Expanders

A. M. Mahmoud, S. A. Sherif, W. E. Lear
Proc. ASME. ES2008, ASME 2008 2nd International Conference on Energy Sustainability, Volume 1, 669-682, August 10–14, 2008
Publisher: American Society of Mechanical Engineers
Paper No: ES2008-54274
https://doi.org/10.1115/ES2008-54274
View Paper titled, Frictional and Internal Leakage Losses in Rotary-Vane Two-Phase Refrigerating Expanders
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Topics: Leakage, Compression, Refrigeration, Vapors, Enthalpy, Fluids, Friction, Leakage flows, Modeling, Refrigerants
Proceedings Papers

A Flexible Fuel Semi-Closed Combined Cycle for Power, Refrigeration and Water

W. E. Lear, J. F. Crittenden, J. R. Khan, S. A. Sherif
Proc. ASME. GT2007, Volume 3: Turbo Expo 2007, 301-309, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27664
https://doi.org/10.1115/GT2007-27664
View Paper titled, A Flexible Fuel Semi-Closed Combined Cycle for Power, Refrigeration and Water
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Topics: Combined cycles, Fuels, Refrigeration, Water, Distributed power generation, Modeling, Absorption, Condensation, Condensed matter, Design
Proceedings Papers

Experimental Study of a Constant-Area Ejector With Two-Phase Fluids

J. A. Bray, W. E. Lear, S. A. Sherif
Proc. ASME. FEDSM2003, Volume 2: Symposia, Parts A, B, and C, 773-779, July 6–10, 2003
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2003-45703
https://doi.org/10.1115/FEDSM2003-45703
View Paper titled, Experimental Study of a Constant-Area Ejector With Two-Phase Fluids
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Topics: Ejectors, Fluids, Thermal management, Conceptual design, Databases, Design, Interchangeable mechanisms, Testing, Thermodynamic cycles
Proceedings Papers

Performance of a Novel Combined Cooling and Power Gas Turbine With Water Harvesting

J. R. Khan, W. E. Lear, S. A. Sherif
Proc. ASME. GT2004, Volume 7: Turbo Expo 2004, 211-223, June 14–17, 2004
Publisher: American Society of Mechanical Engineers
Paper No: GT2004-53013
https://doi.org/10.1115/GT2004-53013
View Paper titled, Performance of a Novel Combined Cooling and Power Gas Turbine With Water Harvesting
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Topics: Absorption, Cooling, Gas turbines, High pressure (Physics), Refrigeration, Vapors, Water, Water harvesting
Proceedings Papers

Second Law Analysis of a Novel Combined Cooling and Power Cycle With Water Harvesting

J. R. Khan, W. E. Lear, S. A. Sherif, John F. Crittenden
Proc. ASME. GT2005, Volume 5: Turbo Expo 2005, 261-270, June 6–9, 2005
Publisher: American Society of Mechanical Engineers
Paper No: GT2005-68628
https://doi.org/10.1115/GT2005-68628
View Paper titled, Second Law Analysis of a Novel Combined Cooling and Power Cycle With Water Harvesting
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Topics: Absorption, Cooling, Gas turbines, High pressure (Physics), Refrigeration, Thermodynamic power cycles, Vapors, Water, Water harvesting, Cycles