Transient thermodynamic analysis of a fuel-cell system
Transient thermodynamic analysis for development of mathematical model that predicts transient temperature and voltage-response characteristics of fuel cell system
Simon, W. E.↗
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Operating characteristics of a liquid-cooled contained electrolyte low temperature fuel cell system over a period of 1500 hours
1500-hour performance tests of liquid-cooled contained-electrolyte low temperature fuel cell system
Easter, R. W.↗
Advanced spacecraft fuel cell systems.
An evolutionary advanced technology program is described which is aimed at meeting the requirements of the next generation of fuel cell systems as well as providing technology fallout to ongoing mission oriented programs. The specific goals of the system selected for development are for 10,000 hr of operation with refurbishment, 20 lb/kW at a sustained power of 7 kW, and 21 kW peaking capability for durations of two hours. The system is designed to operate on low pressure propulsion grade hydrogen and oxygen.
Thaller, L. H.↗
Environmental assessment of the 40 kilowatt fuel cell system field test operation
This environmental assessment examines the potential environmental consequences, both adverse and beneficial, of the 40 kW fuel cell system system field test operation. The assessment is of necessity generic in nature since actual test sites were not selected. This assessment provides the basis for determining the need for an environmental impact statement. In addition, this assessment provides siting criteria to avoid or minimize negative environmental impacts and standards for determining candidate test sites, if any, for which site specific assessments may be required.
Bollenbacher, G.↗
Hydrogen-oxygen fuel cell system with reactant-supersaturated electrolyte feed Final report, 21 Nov. 1966 - 20 May 1967
Conceptual design analysis of hydrogen oxygen fuel cell system with reactant supersaturated electrolyte feed
Zaromb, S.↗
Unitized Regenerative Fuel Cell System Dryer-Humidifier Analytical Model Development
A Unitized Regenerative Fuel Cell (URFC) Energy Storage System is being developed at the NASA Glenn Research Center. This URFC system is unique in that it uses regenerative gas dryers/humidifiers that are mounted on the surface of the gas storage tanks that act as the radiators for thermal control of the URFC system. As the gas storage tanks cool down during URFC charging the regenerative gas dryers/humidifiers dry the hydrogen and oxygen gases produced by electrolysis. As the gas storage tanks heat up during URFC discharging, the regenerative gas dryers/humidifiers humidify the hydrogen and oxygen gases used by fuel cell. An analytical model was developed to simulate the URFC system's regenerative gas dryers/humidifiers. The model is in the form of an EXCEL@ worksheet that allows the investigation of the regenerative gas dryers/humidifier performance as a function of time and position within the regenerative gas dryers/humidifiers, as well as other key system variables. Finite Element Analysis (FEA) modeling of the regenerative gas dryers/humidifier and gas storage tank wall was also done to analyze spatial temperature distribution within the regenerative gas dryers/humidifiers and the localized tank wall. Test results obtained from the testing of the regenerative gas dryers/humidifiers in a thermal vacuum environment were used to corroborate the analyses.
Burke, Kenneth A.↗
Research and development on fuel cell systems Sixth quarterly progress report, 1 Oct. - 31 Dec. 1965
Hydrogen-oxygen fuel cell power systems design, fabrication, and testing
ENERGY CONVERSION↗
Research and development of an open-cycle fuel cell system summary report, 1 jan. - 31 aug. 1964
Theory, operation, and testing of components, single and multicell assemblies, static moisture removal subsystem, and mathematical model of hydrogen-oxygen membrane fuel cell system
TEST PROGRAM↗
A methanol/air fuel cell system
High power-density, self-regulating fuel cell develops electrical power from catalyzed reaction between methanol and atmospheric oxygen. Cells such as these are of particular interest, because they may one day offer an emission-free, extremely efficient alternative to internal-combustion engines as power source.
Asher, W. J.↗
Monitoring and control of fuel-cell system by digital computer
The computer was programmed to handle data, perform limit checks, control normal operation, take corrective actions, and initiate shutdown for a fuel-cell system. The system was operated under computer control for periods up to 30 hr. The adequacy of the programming and interfacing techniques used was verified.
Hagedorn, N. H.↗
Unitized Regenerative Fuel Cell System Gas Storage/Radiator Development
The ancillary components for Unitized Regenerative Fuel Cell (URFC) Energy Storage System are being developed at the NASA Glenn Research Center. This URFC system is unique in that it uses the surface area of the hydrogen and oxygen storage tanks as radiating heat surfaces for overall thermal control of the system. The waste heat generated by the URFC stack during charging and discharging is transferred from the cell stack to the surface of each tank by loop heat pipes. The heat pipes are coiled around each tank and covered with a thin layer of thermally conductive layer of carbon composite. The thin layer of carbon composite acts as a fin structure that spreads the heat away from the heat pipe and across the entire tank surface. Two different sized commercial grade composite tanks were constructed with integral heat pipes and tested in a thermal vacuum chamber to examine the feasibility of using the storage tanks as system radiators. The storage radiators were subjected to different steady-state heat loads and varying heat load profiles. The surface emissivity and specific heat capacity of each tank were calculated. The results were incorporated into a model that simulates the performance of similar radiators using lightweight, space rated carbon composite tanks.
Jakupca, Ian↗
Commercialization of a Direct Methanol Fuel Cell System
This paper describes a major breakthrough in energy technology developed at the Jet Propulsion Laboratory that can be used in a wide variety of portable, remote, and transportation applications without polluting the environment. The status, performance, and design considerations of the JPL non-polluting, direct methanol, fuel cell system for consumer equipment and transportation applications are reported herein. This new fuel cell technology utilizes the direct oxidation of a 3 percent aqueous liquid methanol solution as the fuel and air (O&sub2;) as the oxidant. The only products are CO&sub2; and water. Therefore, because recharging can be accomplished by refueling with methanol, vehicles can enjoy unlimited range and extended use compared to battery operated devices requiring recharging time and power accessibility.
fuel↗
Research and development on fuel cell systems third quarterly progress report, period ending mar. 31, 1965
Fuel cell research and technology - plate design, thermal analysis, performance characteristics, water recovery and purity, control techniques, breadboard items, and system test models
THERMAL PROPERTY↗
Development Status of PEM Non-Flow-Through Fuel Cell System Technology for NASA Applications
Today s widespread development of proton-exchange-membrane (PEM) fuel cell technology for commercial users owes its existence to NASA, where fuel cell technology saw its first applications. Beginning with the early Gemini and Apollo programs, and continuing to this day with the Shuttle Orbiter program, fuel cells have been a primary source of electrical power for many NASA missions. This is particularly true for manned missions, where astronauts are able to make use of the by-product of the fuel cell reaction, potable water. But fuel cells also offer advantages for unmanned missions, specifically when power requirements exceed several hundred watts and primary batteries are not a viable alternative. In recent years, NASA s Exploration Technology Development Program (ETDP) funded the development of fuel cell technology for applications that provide both primary power and regenerative fuel cell energy storage for planned Exploration missions that involved a return to the moon. Under this program, the Altair Lunar Lander was a mission requiring fuel cell primary power. There were also various Lunar Surface System applications requiring regenerative fuel cell energy storage, in which a fuel cell and electrolyzer combine to form an energy storage system with hydrogen, oxygen, and water as common reactants. Examples of these systems include habitat modules and large rovers. In FY11, the ETDP has been replaced by the Enabling Technology Development and Demonstration Program (ETDDP), with many of the same technology goals and requirements applied against NASA s revised Exploration portfolio.
Hoberecht, Mark A.↗
Non-Flow-Through Fuel Cell System Test Results and Demonstration on the SCARAB Rover
This presentation describes the results of the demonstration of a non-flow-through PEM fuel cell as part of a power system on the SCARAB rover at the NASA Glenn Research Center. A 16-cell non-flow-through fuel cell stack from Infinity Fuel Cell and Hydrogen, Inc. was incorporated into a power system designed to act as a range extender by providing power to the SCARAB rover s hotel loads. The power system, including the non-flow-through fuel cell technology, successfully demonstrated its goal as a range extender by powering hotel loads on the SCARAB rover, making this demonstration the first to use the non-flow-through fuel cell technology on a mobile platform.
Scheidegger, Brianne↗
Research and Development on Fuel Cell Systems Quarterly Progress Report, Jan. 1 - Mar. 31, 1966
Advanced fuel cell breadboard model and component testing
Source record↗
Thermal Management of Primary Fuel Cell Systems
Seminar providing an overview of thermal management for primary fuel cells. This presentation does not provide detailed engineering solutions or specific fuel cell designs but is intended to help scientists and engineers from multiple technical disciplines outside of Thermal learn to ask the most pertinent questions when considering a fuel cell thermal design.
Primary Fuel Cell↗
Water outlet control mechanism for fuel cell system operation in variable gravity environments
A self-regulated water separator provides centrifugal separation of fuel cell product water from oxidant gas. The system uses the flow energy of the fuel cell's two-phase water and oxidant flow stream and a regulated ejector or other reactant circulation pump providing the two-phase fluid flow. The system further uses a means of controlling the water outlet flow rate away from the water separator that uses both the ejector's or reactant pump's supply pressure and a compressibility sensor to provide overall control of separated water flow either back to the separator or away from the separator.
Vasquez, Arturo↗