Design issues

At very high and very low temperatures, material selection becomes an important design issue. At low temperatures, the material must have sufficient toughness to preclude transition of the tank material to a brittle state. At high temperatures, corrosion is accelerated, and thermal expansion and thermal stresses of the material occur. 

For fast-setthug slurries, ensuring conveyance is usually the key design issue while pressure drop is somewhat less important. For nonsettling slurries conveyance is not an issue, because the particles do not separate from the liquid. Here, viscous and rheological behavior, which control pressure drop, take on critical importance. 

Boiler Design Issues Boiler design involves the interaction of many variables water-steam circulation, fuel characteristics, firing systems and heat input, and heat transfer. The furnace enclosure is one of the most critical components of a steam generator and must be conservatively designed to assure high boiler availability. The furnace... 

Chase, K. W. and Greenwood, W. H. 1988 Design Issues in Mechanical Tolerance Analysis. Manufacturing Review, 1(1), 50-59. 

You can obtain in-depth information on drinking water plant design issues from the following references. 

The vast majority of corrosion design issues faced in marine and offshore engineering involve water in one form or another. In that regard, the two principal media involved are seawater and formation waters (oilfield brines). Seawater, of course, surrounds offshore installations though may also be used as the medium in reservoir injection and other critical offshore process... 

Other design issues which may be considered when attempting to minimise cavitation damage include ... 

RAMSEY s D, MCINTOSH M, SULLIVAN s D (2001) Design issues for conducting cost-effectiveness analyses alongside clinical trials , Annu Rev Public Health, 22, 129-41. 

Design issues for membrane-based, gas phase microchemical systems, Chem. Eng. 

A number of medium- to long-term enviromnental monitoring networks and programs have been developed over the past 4 decades in the United States, all of which have had to deal with network design issues noted here. Some of these efforts are summarized in Table 5.3. As indicated in Table 5.3, some programs have emphasized random or partially random designs, whereas others have utilized nonrandom designs but based on specific site criteria. 

Although the results from the polymer melt demonstrate the applicability of this technique to a system of great importance, it is also dear that there are design issues that would need to be addressed. The data in Figure 4.2.12 are of much lower quality than those obtained using polymer solutions at room temperature. There are many possibilities for this. The proximity of the extruder to the magnet and the... 

Stocks of raw materials, intermediate and product inventories often have a key influence on the working capital and are under the influence of the designer. Issues relating to storage will be discussed in more detail in... 

Akoski, J., R. D. Watson, P. L. Goranson, A. Hassanian, and J. Salmanson, 1991, Thermal Hydraulic Design Issues and Analysis for ITER Diverters, Fusion Technol. 79.-1729—1735. (4)... 

Usually C02 pipelines are designed using existing national standards for gas and liquid transportation pipes, while additional C02 specific design issues are taken into consideration by the pipeline construction/operation companies to guarantee the reliable and safe operation of a given pipeline. 

We continue with this chapter specifically dealing with experimental design issues. When we leave the realm of the simplest designs, we find that the experiments, and the analyses of the data therefrom, acquire characteristics not existing in the simpler designs, and beyond obvious extensions of them. 

There was another moment of truth in the ballast project I described in Chapter 1, when we had ordered several new boards with its innovative 2N2222-2N2907 npn-pnp latch. But the protection latch on all these boards was not working at all. Design issue We looked hard at the transistors and thought they were OK. After a couple of days we took the transistors out, finally suspecting they were faulty (maybe inadequate hfe, etc.), and then made a discovery—we learned that so-called 2222 transistors do not even have the same pinouts Each manufacturer... 

However, before you start, you should have read the previous chapters and therefore actively ruled out PCB design issues, input decoupling issues, and also junk IC issues. You should also have asked the Twelve Questions from Figure 8-1 and assured yourself you are not obviously falling into any of the all-too-familiar traps. 

Extension of the Kunii-Levenspiel bubbling-bed model for first-order reactions to complex systems is of practical significance, since most of the processes conducted in fluidized-bed reactors involve such systems. Thus, the yield or selectivity to a desired product is a primary design issue which should be considered. As described in Chapter 5, reactions may occur in series or parallel, or a combination of both. Specific examples include the production of acrylonitrile from propylene, in which other nitriles may be formed, oxidation of butadiene and butene to produce maleic anhydride and other oxidation products, and the production of phthalic anhydride from naphthalene, in which phthalic anhydride may undergo further oxidation. 

The use of the VSP equipment to obtain experimental data followed by appropriate calculations [195] is another approach to the vent system design issue. 

Haffher, M. (1998). Orphan drug development—International program and study design issues. Drug Information J. 32 93-99. 

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