System layout cathode

Figure 3.24. System layout for SOFC plant based on natural gas fuel (NG), with gas cleaning except for CO2 and with the possibility of combined power and heat output. "Anode" and "cathode" are obsolete names for the negative and positive electrodes. (From Fontell et al. (2004). Conceptual study of a 250 kW planar SOFC system for CHP application. /. Power Sources 131,49-56. Used by permission from Elsevier.)...

System layout of a hydrogen-powered PEMFC system including cathode humidification from the cathode exhaust. 

System layout using cathode air recirculation for humidity control. 

Figure 4.31 shows a simplified system layout for a liquid-fed DMFC system. In order to benefit from the high energy density of methanol, it is necessary to operate the DMFC system from a supply of pirre methanol. However, since water is required in the electrochemical reaction, and to suppress the formation of mixed potentials at the cathode, the anode should be fed with aqueous methanol. Therefore, a mixing imit for water and methanol needs to be present in the system. 

Figure 1-14 shows a simplified layout for an SOFC-based APU. The air for reformer operation and cathode requirements is compressed in a single compressor and then split between the unit operations. The external water supply shown in figure 1-14 will most likely not be needed the anode recycle stream provides water. Unreacted anode tail gas is recuperated in a tail gas burner. Additional energy is available in a SOFC system from enthalpy recovery from tail gas effluent streams that are typically 400-600°C. Current thinking is that reformers for transportation fuel based SOFC APUs will be of the exothermic type (i.e. partial oxidation or autothermal reforming), as no viable steam reformers are available for such fuels. 

Operation of the Kidd electrolytic zinc plant commenced in 1972 with a cellhouse capacity of 105,000 tonnes of zinc cathode. The original cellhouse layout consisted of 42 parallel rows for a total of 588 cells. As leaching capacity increased, the cellhouse was expanded to 630 cells. Zinc cathode was manually stripped from plant start-up until the development of a mobile automated stripping system in 1994. Machine development continued until a second unit was placed in production in 1996, from which point, 60 % of the cellhouse was being stripped with the automated system. The final phase of the project was implemented in 1999 with the commissioning of two more automated strippers. This paper describes the implementation of the automated stripping system and its impact on cellhouse productivity. 

Multiple-Line Display Control. Often confused with graphics displays, these show multiple lines of information at one time, such as the multiple steps of a bending sequence. They typically use a cathode-ray tube or a flat-panel liquid-crystal diode display. Although they perform much the same function as single-line display controls, the flexible layout of the screen is capable of showing more parameters at a glance. See Fig. 16. Price A typical two-axis systems sell for approximately 16,000.00. 

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