PDF Publication Title:
Text from PDF Page: 070
processed. This value compares to a solubility limit of about 0.0178 cm3 air/ gram water at the conditions of feed water addition. These results projected a lower than 1724 kN/m2 (250 psia) pressure requirement to eliminate degassing. A pressure of 689 kN/m (100 psia) was calculated to be sufficient to eliminate feed water cavity degassing requirements. The SFWEM operating pressure level was increased to 807 kN/m2 (117 psia) to allow for a margin of safety with respect to degassing and the system was operated at this level for the remaining 488 hours of the endurance test. No buildup of feed water cavity gas occurred. Shutdowns. Table 6 summarizes the shutdowns experienced during the 94 days of operation. A total of seven system-related and three nonsystem-related (building power failures) shutdowns occurred. During a power loss shutdown, the STS does not depressurize the module nor does it reposition any valves, only the current is shut off. Upon return of power, the system can automatically continue operation by turning on current. The longest totally uninterrupted operating span was 456 hours. The longest operation span without a system's related shutdown was 1426 hours (only interrupted by three building power failures, see Figure 27 and Table 6). Component Evaluation Single Cell Tests Single cell tests were performed as part of the total test program to evaluate various 02-evolving electrodes, catalysts, and matrices. To allow simultaneous operation of the single cell and six-cell SFWEM, the single cell tests for the component evaluation were run on an available water electrolysis test stand. All tests were run to obtain a short-term comparison of alternate electrodes and matrices to those being used in the six-cell SFWEM. Effect of Electrodes Four different anode (0 -evolving) electrodes were evaluated in the single cell testing. Of the four eiectrodes tested, one was the standard porous Ni electrode (Ni 004) used in the six-cell module, one was a titanium (Ti) electrode fabricated with an electrocatalyst identified under NASA sponsorship at Case Western Reserve University (CWRU) as being potentially capable of high current and low polarization (Ti 005), while the other two electrodes were Contractor-developed, LSI Ni 004A and Ni 005). Figure 29 shows the internal resistance (IR) free voltage for current density spans for the four electrodes in the single cell. The three Contractor- developed NI electrodes exhibit relatively similar performance with the SFWEM baseline electrode yielding the lowest voltage. The Ti 005 electrode shows better performance, especially at higher current densities, (34 mV at 215 mA/cm (200 ASF)) becoming a viable candidate as the future SFWEM baseline electrode. Its performance under long-duration testing remains to be demonstrated. 63 LifeSystc,s, Jnc.PDF Image | WATER ELECTROLYSIS MODULE
PDF Search Title:
WATER ELECTROLYSIS MODULEOriginal File Name Searched:
19750012429.pdfDIY PDF Search: Google It | Yahoo | Bing
Salgenx Redox Flow Battery Technology: Power up your energy storage game with Salgenx Salt Water Battery. With its advanced technology, the flow battery provides reliable, scalable, and sustainable energy storage for utility-scale projects. Upgrade to a Salgenx flow battery today and take control of your energy future.
| CONTACT TEL: 608-238-6001 Email: greg@salgenx.com | RSS | AMP |