A5061529619- Building Energy and Comfort Optimization
- Geothermal Energy Systems and Applications
- Integrated Energy Systems Optimization
- MXene and MAX Phase Materials
- Semiconductor materials and devices
- Spacecraft and Cryogenic Technologies
- Housing Market and Economics
- Energy Efficiency and Management
- Smart Grid Energy Management
- Electrical and Thermal Properties of Materials
- Engineering Education and Pedagogy
- Metal and Thin Film Mechanics
- ZnO doping and properties
- Fluid Dynamics and Thin Films
- Electronic and Structural Properties of Oxides
- Elevator Systems and Control
- Modeling and Simulation Systems
- Copper-based nanomaterials and applications
- Copper Interconnects and Reliability
- Nanoporous metals and alloys
- Air Traffic Management and Optimization
- Advanced ceramic materials synthesis
- Process Optimization and Integration
- Advanced Multi-Objective Optimization Algorithms
- Machine Learning in Materials Science
National Renewable Energy Laboratory
2014-2024
University of Colorado Boulder
2018-2024
Argonne National Laboratory
2016
Cornell University
2012-2014
We investigated the atomic layer deposition (ALD) of indium oxide (In2O3) thin films using alternating exposures trimethylindium (TMIn) and a variety oxygen sources: ozone (O3), O2, deionized H2O, hydrogen peroxide (H2O2). used in situ quartz crystal microbalance measurements to evaluate effectiveness different sources found that only O3 yielded viable sustained In2O3 growth with TMIn. These also provided details about mechanism enabled us verify both TMIn surface reactions were...
Network topology greatly influences both the economic and environmental performance of fifth generation district heating cooling (5GDHC) systems. In this study optimal trade-offs between 5GDHC network topologies for a five-building with waste heat recovery were explored. A life cycle assessment method was used to calculate total CO2 emissions (LCCO2) associated installation operation various topologies. Twelve months empirical data from center system analyzed assess its suitability...
Copper nitrides are defect-tolerant semiconductors with properties that promising for solar energy conversion applications. Currently, there few known ternary copper nitride materials. Here, we synthesized a previously unreported CuNbN2 using an ion-exchange reaction and subsequently determined its properties. has layered delafossite-type structure NbN6 octahedra arranged in layers separated by linear N–Cu–N bonds. Experimental measurements theoretical calculations agree 1.3–1.4 eV optical...
Abstract Advanced district thermal energy systems, which circulate water at temperatures near ambient conditions, and facilitate the utilization of waste heat renewable sources, can lower carbon-intensity urban districts, advancing U.N. Sustainable Development Goals. Optimization network topology — selection best subset buildings to connect them, minimize life cycle cost increase adoption these system in appropriate applications. The potential “solution space” optimization problem grows...
The URBANopt project has successfully leveraged OpenStudio/EnergyPlus to model buildings and electrical systems at an urban scale; however, lacked the ability district thermal energy until recently. This paper will present modeling infrastructure that was developed specifically for analysis of heating cooling systems, how it is integrated into existing framework. also discusses development new models added Modelica Buildings Library various system components including loads, transfer...
Distributed electric generation systems are increasingly considered to offset energy costs and carbon emissions of large building complexes. College campuses, with their physical compactness, diversity in loads, present a common application for distributed systems. This paper presents the analysis approach main results feasibility study system supply thermal university campus, incorporating efficiency measures, reduce at minimal life cycle cost. The presented uses load profile developed...
Abstract Metastable CuNbN 2 is synthesized by a solid state ion‐exchange reaction between polycrystalline NaNbN (obtained of Na metal and NbN under ammonia flow at 500 °C for 24 h) 5‐fold excess CuI (N atmosphere, 300 °C, 48 h).
Abstract The chemical stability of mesoporous transition metal nitrides MN (M: Nb, V, Cr, Ti) in water at 80 °C under neutral, acidic, and alkaline conditions is investigated by powder XRD SEM.