摘要:
A method and system for counteracting performance deterioration in an electrochemical fuel cell includes passive re-activation, active re-activation, or both. Active re-activation includes intermittently applying positive voltage electrical pulse across the anode. The positive voltage applied is less than that required for decomposition of water. Passive re-activation includes interposing a resistive load between the anode and the cathode while fuel stream flow to the anode is interrupted. The resistive load increases voltage potential at the anode to less than that required for oxidation of carbon.
摘要:
A direct organic liquid feed unit fuel cell comprises an anode current collector, a cathode current collector, a membrane electrode assembly, and a fuel delivery layer for diluting a concentrated fuel stream and delivering the fuel stream to the anode at a uniform concentration across the planar extent of the anode, independently of the orientation of the fuel cell.
摘要:
An energy adjusting method for controlling output energy of a fuel cell group, wherein at least one of the fuel cell group and a secondary battery group drives a load is disclosed. The voltage of the fuel cell group is boosted by a boost regulation module to generate a first adjustment voltage. The boost regulation module boosts the voltage of the fuel cell group according to a first control signal. The first adjustment voltage is dropped by a drop regulation module to generate a second adjustment voltage to the load. The drop regulation module drops the first adjustment voltage according to a second control signal. At least one of the fuel cell group, the boost regulation module, the drop regulation module and the load is detected to generate a detection result. The first and the second control signals are generated according to the detection result.
摘要:
A composite proton exchange membrane includes first and second outer proton exchange membrane layers each having an exterior peripheral portion. An inner proton exchange membrane layer is interposed between the first and second outer membrane layers. The inner membrane layer has an exterior peripheral portion encompassed within each of the outer membrane layer peripheral portions. A substantially fluid-impermeable edge bonding film is interposed between the first and second outer membrane layers. The edge bonding film circumscribes the inner membrane layer peripheral portion and is disposed within each of the outer membrane layer peripheral portions. The edge bonding film cooperates with the first and second outer membrane layers to encapsulate the inner layer.
摘要:
An automatic vehicle following system is provided for controlling a following vehicle to maintain at least a predetermined distance behind a preceding vehicle and to substantially follow the path of the preceding vehicle. An on-line measurement system of the preceding vehicle generates signals indicative of the velocity (having speed and directional components) of the preceding vehicle, and a communication system transmits the velocity signals to the following vehicle. The following vehicle likewise has a communication system for receiving the signals from the preceding vehicle, and an on-line measurement system for providing signals indicative of the velocity of the following vehicle and signals indicative of the distance between the two vehicles. A signal processing system of the following vehicle is coupled to the communication system and on-line measurement system for estimating motion trajectory of the preceding vehicle based on the difference in the velocities of the preceding and following vehicles and the following distance. A control system generates control signals and takes action so as to perform speed control and maintain at least a predetermined safe following distance between the two vehicles, and steering control to substantially follow the path of the preceding vehicle.
摘要:
A composition for cleaning bearings in rotating equipment and industrial machinery that contains powdered limestone having a high calcium content dispersed in a calcium sulfonate grease, together with a colorant that readily enables a user to differentiate between contaminated grease, cleaning composition and fresh grease. A method is also disclosed that enables a user to clean and re-lubricate bearings without the need for removing the bearings from service or for shutting down the associated equipment or machinery.
摘要:
A composition for cleaning bearings in rotating equipment and industrial machinery that contains powdered limestone having a high calcium content dispersed in a calcium sulfonate grease, together with a colorant that readily enables a user to differentiate between contaminated grease, cleaning composition and fresh grease. A method is also disclosed that enables a user to clean and re-lubricate bearings without the need for removing the bearings from service or for shutting down the associated equipment or machinery.
摘要:
An energy adjustor coupled between a fuel cell group and a secondary battery group is disclosed. A load is coupled to the secondary battery group in parallel. The energy adjustor includes a boost regulation module, a drop regulation module, a detecting module and a control module. The boost regulation module boosts an output voltage of the fuel cell group to generate a first adjustment voltage according to a first control signal. The drop regulation module drops the first adjustment voltage to generate a second adjustment voltage to the load according to a second control signal. The detecting module detects at least one of the fuel cell group, the boost regulation module, the drop regulation module and the load to generate a detection result. The control module generates the first and the second control signals according to the detection result.
摘要:
There is disclosed a direct fuel cell comprising an anode and a cathode immersed in an electrolyte in the presence of a reductant and oxidant. Specifically, the fuel cell lacks a permselective membrane or other chemical barrier between the anode and cathode. Instead, the fuel cell has a mechanical/electrical porous separator that permits the free diffusion of liquid between all elements of the fuel cell. The fuel cell further contains an anode electrode of conductive substrate with catalyst and a cathode comprising a hydrophobic coated material that prevents cathode flooding. As a result, oxidation of the anode fuel and reduction of the cathode fuel occur to a substantial extent only at the anode and cathode, respectively, and is capable for ambient pressure/temperature and passive operation.
摘要:
Complex greases of overbased alkaline earth metal carboxylates are prepared by reacting an overbased alkaline earth metal salt of a fatty acid, wherein the alkaline earth metal salt has an alkaline earth metal content of at least 14.5% and a non-volatile matter content of at least 95% with conversion agents to form a grease precursor. The grease precursor is then reacted with complexing agents to form a predominantly vaterite containing non-Newtonian modified overbased metal carboxylate complex grease.