Analytic power proposes a system analysis of three potential naval auxiliary power plants using fuel cell technology. a systems analysis of this application is mandatory because, more often than not, the fuel cell is not the limiting technology. in many cases, the fuel processor can be much larger… More

Analytic power proposes the development of an electropneumatic actuator which permits swift, smooth, electronically controlled movement, even under heavy loads. the approach is an extension of their electrochemical refrigeration compressor technology which has been supportedby private industry and… More

A closed cycle cryocooler is being investigated using an approach that combines electrochemical compressor and ejector technologies. an electrochemically inactive cryogen is being used in a unique ternary refrigerant. likeother electrochemically-driven refrigeration systems under development, this… More

A new approach to closed-cycle, cryogenic cooling will be developed using a polymer-membrane-based, electrochemically driven cryostat that employs oxygen as the two-phase working fluid in a modified linde-hampson, double-expansion cycle. the cycle permits the use of advanced membranes in an… More

Presently available portable, 300 watt power source technology is limited to batteries, solar cells and gasoline engines. gasoline engines suffer from poor efficiency, noise and high maintenance. today, batteries alone can provide reliable power. while advances in the last 20 years have increased… More

Fuel cells offer many advantages over standard power production systems, including full cycle efficiencies of 60%, a wide range of useable fuels and environmentally soundcombustion with very low emissions. however, factors such as cost and low performance have held these systems back. analytic power… More

Solid oxide fuel cells offer many advantages over standard power production systems, including full cycle efficiencies of 60%, a wide range of usable fuels, and environmentally sound combustion with very low nox emissions. however, problems such as cost and low performance must be resolved. this… More

The program is directed towards the development of a planar, low temperature (650c), internally reforming solid oxide fuel cell (sofc) power supply that will lead to the power plant having a power density equivalent to a modern gas turbine and an efficiency over 65 percent. the cell design is based… More

The fuel cell power supplies of today are two times too heavy compared to man-portable power supplies. A major portion of the weight is in the fuel cell stack, a stack of carbon electrodes with metal bipolar plate separators that are sandwiched between two end plates and held in place by tie rods. … More

To Operate effectively, PEM small fuel cells stacks need a chemical hydride hydrogen generator. The chemical hydride digital reactor suggested in the proposed program will provide about 2.5 kWH of energy in a5 pound package.--almost three times the energy density of a BA5590 battery. … More

Diesel fuel processors, the largest and most expensive system in a fuel cell power plant, are decidedly not modular. Every change in power specification means a change in fuel processor design. They have at least five reactors and many more heatexchangers. They require a plethora of power consuming… More

Diesel fuel is a primary candidate for use aboard submarines. It has a high energy density and it is already in the Navy inventory. Fuel cells are attractive for submarines from an energy density perspective. Unfortunately, in hydrocarbon reforming power systems, the fuel cell power density is… More

78241S Today¿s mechanical, hydrogen compression technology is inefficient, costly, unreliable, and lacking in durability. The inefficiency is derived from the fact that piston and diaphragm compressors are, essentially, isentropic machines. The other problems mentioned above are common to… More

Despite fifteen years of R&D, PEM fuel cell power plants have not been successfully deployed on naval vessels. The principal cause is the fuel processor, which must operate on diesel fuel with up to 1wt% sulfur, but provide pure hydrogen to a PEM fuel cell that is intolerant of impurities. The… More