Engineering Papers⌕ Search

Engineering topics

Tucker, David

Publications and source records attributed to Tucker, David.

At least 55 records · Page 3
All sourcesNASA NTRSDOE OSTI
DOE OSTI2016

Low Emission Advanced Power (LEAP) Workshop - Technical Note

Sixty (60) representatives from nine (9) corporations, six (6) national laboratories, and fifteen (15) universities came to the National Energy Technology Laboratory’s (NETL’s) Morgantown, West Virginia site from all over the world to participate in the workshop. Important opportunities for hybrid power systems were identified and key challenges associated with their implementation and commercialization were discussed. The main outcomes and technical conclusions from the workshop are summarized below.

29 ENERGY PLANNING, POLICY, AND ECONOMY↗
DOE OSTI2016

Low Emission Advanced Power (LEAP) Workshop 2016

Sixty (60) representatives from nine (9) corporations, six (6) national laboratories, and fifteen (15) universities came to the National Energy Technology Laboratory’s (NETL’s) Morgantown, West Virginia site from all over the world to participate in the workshop. Important opportunities for hybrid power systems were identified and key challenges associated with their implementation and commercialization were discussed.

20 FOSSIL-FUELED POWER PLANTS↗
DOE OSTI2013

Energy conversion with solid oxide fuel cell systems: A review of concepts amd outlooks for the short- and long-term

A review of energy conversion systems which use solid oxide fuel cells (SOFCs) as their primary electricity generation component is presented. The systems reviewed are largely geared for development and use in the short- and long-term future. These include systems for bulk power generation, distributed power generation, and systems integrated with other forms of energy conversion such as fuel production. The potential incorporation of CO{sub 2} capture and sequestration technologies and the influences of potential government policies are also discussed.

30 DIRECT ENERGY CONVERSION↗
DOE OSTI2013

Avoiding compressor surge during emergency shutdown hybridturbine systems

A new emergency shutdown procedure for a direct-fired fuel cell turbine hybrid power system was evaluated using a hardware-based simulation of an integrated gasifier/fuel cell/turbine hybrid cycle (IGFC), implemented through the Hybrid Performance (Hyper) project at the National Energy Technology Laboratory, U.S. Department of Energy (NETL). The Hyper facility is designed to explore dynamic operation of hybrid systems and quantitatively characterize such transient behavior. It is possible to model, test, and evaluate the effects of different parameters on the design and operation of a gasifier/fuel cell/gas turbine hybrid system and provide a means of quantifying risk mitigation strategies. An open-loop system analysis regarding the dynamic effect of bleed air, cold air bypass, and load bank is presented in order to evaluate the combination of these three main actuators during emergency shutdown. In the previous Hybrid control system architecture, catastrophic compressor failures were observed when the fuel and load bank were cut off during emergency shutdown strategy. Improvements were achieved using a nonlinear fuel valve ramp down when the load bank was not operating. Experiments in load bank operation show compressor surge and stall after emergency shutdown activation. The difficulties in finding an optimal compressor and cathode mass flow for mitigation of surge and stall using these actuators are illustrated.

20 FOSSIL-FUELED POWER PLANTS↗
DOE OSTI2012

Characterization of a Solid Oxide Fuel Cell Gas Turbine Hybrid System Based on a Factorial Design of Experiments Using Hardware Simulation

A full factorial experimental design and a replicated fractional factorial design were carried out using the Hybrid Performance (HyPer) project facility installed at the National Energy Technology Laboratory (NETL), U.S. Department of Energy to simulate gasifer/fuel cell/turbine hybrid power systems. The HyPer facility uses hardware in the loop (HIL) technology that couples a modified recuperated gas turbine cycle with hardware driven by a solid oxide fuel cell model. A 34 full factorial design (FFD) was selected to study the effects of four factors: cold-air, hot-air, bleed-air bypass valves, and the electric load on different parameters such as cathode and turbine inlet temperatures, pressure and mass flow. The results obtained, compared with former results where the experiments were made using one-factor-at-a-time (OFAT), show that no strong interactions between the factors are present in the different parameters of the system. This work also presents a fractional factorial design (ffd) 34-2 in order to analyze replication of the experiments. In addition, a new envelope is described based on the results of the design of experiments (DoE), compared with OFAT experiments, and analyzed in an off-design integrated fuel cell/gas turbine framework. This paper describes the methodology, strategy, and results of these experiments that bring new knowledge concerning the operating state space for this kind of power generation system.

30 DIRECT ENERGY CONVERSION↗