System Design and Performance Projections

Design of an RO system has a great effect on the potential for fouling or scaling the membranes. As discussed in Chapter 9, feed water flow, concentrate flow, water flux, and recovery all affect the ability of the membranes to foul and scale. Flow rates affect the concentration polarization boundary layer where fouling and scaling occur (see 

Should an RO system show signs of performance problems, the design of the system should be explored. Do the flow rates and fluxes agree with the guidelines presented in Tables 9.1, 9.2, and 9.3 If not, then the effect the variation(s) has on performance should be evaluated. 

Should an RO system show signs of performance problems, the design of the system should be explored. Do the flow rates and fluxes agree with 

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The first task conducted in this project is to evaluate all of the competing technologies that could be utilized for each of the components in the entire fuel cell and vehicle fueling system based on the criteria of cost, performance, and technical feasibility. The goal of this initial, broad-based assessment is to select the most promising (four to five) system designs and technologies on the basis of the above criteria. 

Task 1, Project kick-olT Summarize the impact of system operating parameters on the design and performance of PEM and solid oxide fuel cells. 

The classic example of the project organization hamstrung by such lack of flexibility is where every purchase order is delayed interminably, then issued in the form of a letter of intent (bypassing the computer system), because the input information is never quite right for the computer. Accounts are then unpaid because there is no purchase order, the suppliers cease to perform, and so on. The project team blame the computer system, the system designers blame the project team s inputs, and frustration continues. 

The individual user is one of the major considerations. The input of those who will use the system day-in and day-out is critical to the design. The role of the user in the design will vary based on the specifics of the automation project. In the case where the system will be customized, the user must have input on almost every aspect. This will allow the resulting method to approximate the manual or current approach as closely as possible. Off the shelf systems (semi and fully automated) likewise are very dependent upon user input however, a careful balancing act has to be performed. Our... 

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