Stack targets

X Cogeneration stack targeted I—Lifetime predicted to exceed A Cogeneration slack actuai... 

The bilateral tolerance stack model including a factor for shifted component distributions is given below. It is derived by substituting equations 3.11 and 3.18 into equation 3.2. This equation is similar to that derived in Harry and Stewart (1988), but using the estimates for Cp and a target Cp for the assembly tolerance... 

Sputtering- Deposition of copper doped (damascene) almninum interconnects, as well as diffusion barriers, and anti-reflective stacks of Ti/TiN is done by this technique. The metal is heated by an electron beam and "sputters" onto the target. Nitrogen gas is used when TiN is required. 

Each of the components of an SOFC stack anodes, cathodes, electrolytes, and interconnects must be thermally, chemically, mechanically, and dimensionally stable at the operating conditions and compatible with the other layers with which they come into contact in terms of thermal expansion and chemical inter-reaction. They must also have compatible processing characteristics. In addition to those requirements, the individual layers have additional microstructural, property, and processing target requirements, as summarized in Table 6.1. 

The greatest uncertainty today is the cost development of the electrochemical part of the system, the fuel-cell stack. Experts agree that it could be mass-produced at reasonable cost. The target-costing approach states that, in the long term, the specific costs of the fuel-cell stack must be in the order of 10/kWel (based on a 75kWel power for each of the two fuel-cell stacks). 

A corollary to the above is to remove or modify aryl moieties in the target molecule. This may have the effect of reducing clog P and potentially disrupting re-stacking with the channel. 

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