摘要:
A method of fuel cell stack humidification is provided incorporating the use of an accumulation device. The method provides for feeding back humid anode exhaust gas of the fuel cell stack to the fuel cell inlet and switching the anode inlet and outlet of the fuel cell stack for achieving better homogeneity of humidity along the fuel cell channels.
摘要:
A method of fuel cell stack humidification is provided incorporating the use of an accumulation device. The method provides for feeding back humid anode exhaust gas of the fuel cell stack to the fuel cell inlet and switching the anode inlet and outlet of the fuel cell stack for achieving better homogeneity of humidity along the fuel cell channels.
摘要:
A polymer electrolyte membrane fuel cell system uses a wetting and/or cooling with a liquid medium. A liquid distributor is provided in one or both axial process gas supply lines. The liquid distributor uses acoustic waves for producing droplets directly in front of the gas inlet of each fuel cell unit of a fuel cell stack and feeds the droplets to the process gas flow.
摘要:
A magnetoresistive sensor may be constructed with material having a perovskite-like crystal structure and an increased magnetoresistive effect. The material is based on the composition (A1).sub.1-x (A2).sub.x MnO.sub.z, with A1 (trivalent) selected from Y, La, or a lanthanide, A2 (bivalent) from an alkaline-earth metal or Pb, and with 0.1.ltoreq.x.ltoreq.0.9 and 2.0.ltoreq.z.ltoreq.3.5. The sensor contains a layer system with at least two layers with different materials, but in each case in the context of the aforesaid composition, which is selected so that the temperature correlation of the electrical resistance is relatively small. The two layers of the layer system can also be united into a single layer structure with a concentration gradient.
摘要翻译:磁阻传感器可以由具有类钙钛矿晶体结构和增加的磁阻效应的材料构成。 该材料基于组成(A1)1-x(A2)xMnOz,其中选自Y,La或镧系元素的A1(三价),来自碱土金属或Pb的A2(二价) /=x=0.9和2.0 = z = 3.5。 传感器包含具有不同材料的至少两层的层系统,但是在每种情况下,在上述组成的上下文中,其选择为使得电阻的温度相关性相对较小。 层系统的两层也可以结合成具有浓度梯度的单层结构。
摘要:
A heat exchange cell and to a method of utilizing the waste heat of an air-cooled fuel cell battery is described. The heat exchange cell is of a configuration similar to that of the fuel cell and, in the stack, should directly adjoin the fuel cell battery, so that the spent cooling air is utilized to heat a medium without an intermediate line.
摘要:
The invention is directed to an intermediate element for thermal, electrical and mechanical connection of two parts, particularly two fuel cells. The intermediate element is corrugated and each corrugation is respectively multiply interrupted along its wave hill/wave valley and is coined upward and downward in alternation.
摘要:
A method for preparing a structure having enhanced magneto-resistance, and use of the structure, in which it is possible to prepare a structure having enhanced magnetoresistance on the basis of the system of materials Cu--Co, especially for a magnetoresistive sensor. An intermediate of the structure is formed initially from an alloy having Cu mixed crystals supersaturated with Co by means of a rapid-solidification technique and this intermediate is subsequently converted by means of a predefined heat treatment into an end product of the desired structure having precipitations of or including Co in a Cu matrix.
摘要:
Various embodiments of a gas storage and supply system and its operation processes having pre-selected temperature and pressure limits are disclosed. Various temperature and pressure profiles may be used to supply stored gas to a gas consuming device.
摘要:
Various embodiments of a gas storage and supply system and its operation processes having pre-selected temperature and pressure limits are disclosed. Various temperature and pressure profiles may be used to supply stored gas to a gas consuming device.