A5084250150- Geothermal Energy Systems and Applications
- Building Energy and Comfort Optimization
- Heat Transfer and Optimization
- Electric Vehicles and Infrastructure
- Advanced Battery Technologies Research
- Groundwater flow and contamination studies
- Spacecraft and Cryogenic Technologies
- Wind and Air Flow Studies
- Advancements in Battery Materials
- Water-Energy-Food Nexus Studies
- Soil and Unsaturated Flow
- Energy Load and Power Forecasting
- Urban Heat Island Mitigation
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Adsorption and Cooling Systems
- Landfill Environmental Impact Studies
- Drilling and Well Engineering
- Integrated Energy Systems Optimization
- Phase Change Materials Research
- Refrigeration and Air Conditioning Technologies
- Transportation and Mobility Innovations
- Geophysical and Geoelectrical Methods
- Climate change and permafrost
- CO2 Sequestration and Geologic Interactions
- Vibration and Dynamic Analysis
National Renewable Energy Laboratory
2020-2024
Oklahoma State University
2016-2019
As electric vehicle penetration increases, charging is expected to have a significant impact on the grid. Electric stations will greatly affect building site's power demand, especially with onset of fast levels as high 350 kW per charger. Here, we assess how would retail big box grocery store, exploring numerous station sizes, levels, and utilization factors in various climate zones seasons. We measure effect by assessing changes monthly peak electricity usage, annual bill, computed using...
Abstract Direct surface water cooling systems utilize lake or seawater to provide for buildings district systems, without using a heat pump lower the temperature further. Surface can heating and/or and heating/cooling as their source/sink. These have been used from 1940s, yet neither design guidelines nor energy calculation procedures developed. Under right circumstances, direct remarkably high seasonal system coefficients of performance—as 25. also performance; values 4.2 4.0 reported. The...
This paper presents an enhanced vertical ground heat exchanger (GHE) model for whole-building energy simulation (WBES). WBES programs generally have computational constraints that affect the development and implementation of component sub-models. require models execute quickly efficiently due to how are utilized by design engineers. also be formulated so their performance can determined from boundary conditions set upstream components environmental conditions. The GHE developed during this...
Surface water heat pump systems utilize surface bodies, such as lakes, reservoirs, and rivers, sources sinks. Closed-loop pumps use submerged exchangers to extract or reject from the body. Heat transfer between exchanger lake is generally governed by buoyancy driven natural convection. One form of spiral-helical exchanger, which usually fabricated high-density polyethylene tubing. Though exterior convective resistance an important part design calculation, convection correlations suitable for...
Ground heat exchangers (GHEs) are often simulated using response factor-type models that rely on the GHE load history. As simulation progresses, number of history terms need to be included in temperature computation grows. For extended, multiyear simulations required time due these can excessive, which limits usefulness models. To cope with this, aggregation procedures have been developed preserve net effect individual loads but reduce overall computations. The previously methods...
Thermal energy storage (TES) can enable more building-sited renewable electricity generation and lower costs for buildings owners occupants, especially when there are high demand charges variability in time-of-use (TOU) charges, but it is precisely with these complex rates that control strategy becomes less clear. A model predictive (MPC) has the potential to increase utilization savings. This study examines utility bill savings medium office chiller plants across scenarios three locations...
Existing tools for community or urban-scale energy system modeling and simulation are often limited in their capabilities require expert-level proficiency to develop models. To address this gap, we propose an integrated sizing platform district systems with geothermal heat pumps. The uses geometric non-geometric user inputs related the buildings, borefield, loop, sizes exchanger, generates a corresponding model, runs annual automatically. borefield component model on our was validated...
Extreme DC fast charging could be competitive with the internal combustion engine refueling experience and enable longer-distance travel, but have high capital costs extremely variable, high-power demands. For low-wait, 200-miles-in-10-minutes XFC stations behind-the-meter systems (BTMS), optimal break-even levelized of (LCOC) are examined across 96 scenarios. LCOC is simulated via synthetic XFC-capable EV loads, machine-learned battery life models from testing data, nonlinear controls...