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Journal Articles

Metamaterial Window Glass

Alex Heltzel, Tyler Mann, John R. Howell
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. October 2018, 10(5): 051010.
Paper No: TSEA-15-1130
https://doi.org/10.1115/1.4039921
Published Online: May 22, 2018
View Article titled, Metamaterial Window Glass
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Topics: Absorption, Glass, Metamaterials, Energy efficiency, Emissivity, Simulation, Finite difference time-domain analysis, Design, Solar energy
Proceedings Papers

Design and Optimization of Thermal Selective Emitters for High-Efficiency Thermophotovoltaic (TPV) Power Generation

Anil Yuksel, Alex Heltzel, John R. Howell
Proc. ASME. ES2015, Volume 1: Advances in Solar Buildings and Conservation; Climate Control and the Environment; Alternate Fuels and Infrastructure; ARPA-E; Combined Energy Cycles, CHP, CCHP, and Smart Grids; Concentrating Solar Power; Economic, Environmental, and Policy Aspects of Alternate Energy; Geothermal Energy, Harvesting, Ocean Energy and Other Emerging Technologies; Hydrogen Energy Technologies; Low/Zero Emission Power Plants and Carbon Sequestration; Micro and Nano Technology Applications and Materials, V001T10A003, June 28–July 2, 2015
Publisher: American Society of Mechanical Engineers
Paper No: ES2015-49581
https://doi.org/10.1115/ES2015-49581
View Paper titled, Design and Optimization of Thermal Selective Emitters for High-Efficiency Thermophotovoltaic (TPV) Power Generation
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Topics: Design, Diffraction gratings, Energy conversion, Energy gap, Energy generation, Manufacturing, Modeling, Noise (Sound), Optimization, Power converters
Proceedings Papers

Metamaterial Window Glass for Adaptable Energy Efficiency

Alex Heltzel, Tyler Mann, John R. Howell
Proc. ASME. HT2013, Volume 2: Heat Transfer Enhancement for Practical Applications; Heat and Mass Transfer in Fire and Combustion; Heat Transfer in Multiphase Systems; Heat and Mass Transfer in Biotechnology, V002T04A023, July 14–19, 2013
Publisher: American Society of Mechanical Engineers
Paper No: HT2013-17511
https://doi.org/10.1115/HT2013-17511
View Paper titled, Metamaterial Window Glass for Adaptable Energy Efficiency
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Topics: Energy efficiency, Glass, Metamaterials, Emissivity, Absorption, Cold climates, Design, Engineering simulation, Green construction, Nanoscale phenomena
Proceedings Papers

Broadband Absorption Enhancement in Thin Film Solar Cells Using Inverse Optimization of Light Trapping Mechanisms

Shima Hajimirza, Alex Heltzel, John Howell
Proc. ASME. MNHMT2012, ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer, 559-567, March 3–6, 2012
Publisher: American Society of Mechanical Engineers
Paper No: MNHMT2012-75065
https://doi.org/10.1115/MNHMT2012-75065
View Paper titled, Broadband Absorption Enhancement in Thin Film Solar Cells Using Inverse Optimization of Light Trapping Mechanisms
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Topics: Absorption, Optimization, Solar cells, Thin films, Diffraction gratings, Coatings, Silver, Algorithms, Design, Engineering simulation
Journal Articles

Specification of Micro-Nanoscale Radiative Patterns Using Inverse Analysis for Increasing Solar Panel Efficiency

Shima Hajimirza, Georges El Hitti, Alex Heltzel, John Howell
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Radiative Heat Transfer
J. Heat Mass Transfer. October 2012, 134(10): 102702.
https://doi.org/10.1115/1.4006209
Published Online: August 7, 2012
View Article titled, Specification of Micro-Nanoscale Radiative Patterns Using Inverse Analysis for Increasing Solar Panel Efficiency
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Topics: Absorption, Geometry, Optimization, Silicon, Simulation, Solar energy, Simulated annealing, Solar cells, Nanowires, Photons
Proceedings Papers

Analysis of a Graphene/Ultrathin Graphite Heat Exchanger for Aerospace Thermal Management

Alex Heltzel, Columbia Mishra, Rodney S. Ruoff, Andrew Fleming
Proc. ASME. AJTEC2011, ASME/JSME 2011 8th Thermal Engineering Joint Conference, T30101, March 13–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJTEC2011-44635
https://doi.org/10.1115/AJTEC2011-44635
View Paper titled, Analysis of a Graphene/Ultrathin Graphite Heat Exchanger for Aerospace Thermal Management
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Topics: Aerospace industry, Graphene, Graphite, Heat exchangers, Thermal management, Aluminum, Heat, Air flow, Anisotropy, Computer cooling
Proceedings Papers

Specification of Micro-Nanoscale Radiative Patterns Using Inverse Analysis for Increasing Solar Panel Efficiency

Shima Hajimirza, Georges El Hitti, Alex Heltzel, John Howell
Proc. ASME. AJTEC2011, ASME/JSME 2011 8th Thermal Engineering Joint Conference, T30102, March 13–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJTEC2011-44642
https://doi.org/10.1115/AJTEC2011-44642
View Paper titled, Specification of Micro-Nanoscale Radiative Patterns Using Inverse Analysis for Increasing Solar Panel Efficiency
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Topics: Nanoscale phenomena, Solar energy, Absorption, Optimization, Design, Silver, Nanowires, Photons, Radiation (Physics), Radiation effects
Journal Articles

Nanostructuring Borosilicate Glass With Near-Field Enhanced Energy Using a Femtosecond Laser Pulse

Alex Heltzel, Arvind Battula, J. R. Howell, Shaochen Chen
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Technical Papers
J. Heat Mass Transfer. January 2007, 129(1): 53–59.
https://doi.org/10.1115/1.2360595
Published Online: May 26, 2006
View Article titled, Nanostructuring Borosilicate Glass With Near-Field Enhanced Energy Using a Femtosecond Laser Pulse
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Topics: Ablation (Vaporization technology), Borosilicate glasses, Density, Electrons, Lasers, Atomic force microscopy, Heat resistant glass, Dielectric materials