Engineering senses

Mitigation measures can also be passive safeguards, meaning that they require no human intervention and no engineered sensing and actuation system to work. Examples of passive mitigation measures are secondary containment systems, blast-resistant and fire-resistant structures, insulated or low-heat-capacity spill surfaces to reduce the rate of evaporation, and an increased distance between the hazardous materials and energies and the sensitive receptors. 

Is this reasonable It says that the consumption of reactant will be greater (the ratio of Ca to Cao will be smaller) the bigger k and t are. This certainly makes good chemical engineering sense. If k is zero (i.e., no reaction) the final steadystate value of Ca will be equal to the feed concentration, as it should be. Note that Ca(,) would not be dynamically equal to Cao it would start at 0 and rise asymptotically up to its final steadystate value. Thus the predictions of the solution seem to check the real physical world. 

A fourth type of innovation is one which results in an entirely new process in the engineering sense. All the process coefficients may be very different in fact, entirely different inputs may be used, or new physical or chemical principles may be employed. In contrast to production of ammonia from coal, steam reforming of natural gas was such an innovation, as was the shift from propellor to jet aircraft. Current research to produce nitrogen-fixing (ammonia-producing) bacteria that are symbiotic with corn through DNA manipulation is innovative activity of the fourth type. 

A most dominating chemist as well as a chemical engineer or a corrosion engineer who is involved in the oil field industry will certainly appreciate the fact that rubber is an engineering material. In an engineering sense, molded rubber components are used under strain and... 

While new chemical product development has historically been the domain of chemists, the use of chemical products by consmners invariably involves some transformation of the product due to applied stresses, temperature gradients, physicochemical hydrodynamics, mass transfer, etc., making product use a process in the chemical engineering sense. [2,4] Thus the analysis of product behavior ultimately requires the same fundamentals as the analysis of process behavior, and is well suited to study by chemical engineers. 

Thus we see that severe surface deformation during contact in an ambient air environment is required to bring about adhesion in the engineering sense even for ductile metals. If we define a coefficient of adhesion e by the relation... 

Pressure test" is something of a misnomer, as it is a force, equal to the resistance to shear and crushing under the slightly convex 7/16-inch diameter tip, that is measured and not pressure in the usual physical or engineering sense. Its widespread use can be explained by its simplicity and easy adaptability to use in the orchard or plant. Furthermore, it does provide a reasonably good correlation - somewhat dependent on variety -with both peelability and final product texture in the case of apple slices or sauce and with pressability for cider and juice. 

The important matter is the fact that when values of function of two variables are analyzed, the range of material variables (coded values) is narrowed to <-l, 1>. The analysis of graphs (especially in case of hyperbolic paraboloid) shows pairs of maxima and minima (or very clear tendency to the pair of extrema. Considering the mathematics - such result is correct but considering the technical properties - it is necessary to find the extremum that would be correct and rational in an engineering sense. Some of the extrema need to be rejected as they are reached with combinations of material variable values for the polymer-cement coating which are not relevant. Such result was reached in case of the flexibility index in function of coded values polymer to Portland cement ratio (P/C) and hydrophobic agent to Portland cement ratio (H/C). The shape of surface described by this relation was a hyperbolic paraboloid (refer with Fig. 5). 

I m afraid I have digressed from my topic, which was supposed to be linus . The philosophy of linus has been determined entirely by the end-product the aim is to try and design a simple, compact reactor that might actually work in the engineering sense, and thenexaminetheplasmaconditionsthat will be necessary. I do not think we should expect to get all the physics done first, and then worry about the engineering. 

The principles and fundamentals presented in these chapters will be used to develop the basic understanding of the various polymer processes so that operations, analysis, design, and development can be properly treated in an engineering sense. 

This story only makes engineering sense when one knows that both the motor and compressor were constant-speed machines. For motor-driven centrifugal compressors that are oversized for a particular service, throttling the compressor suction is the most energy-efficient method to control the discharge pressure. 

As described in Chapter 9, care must be taken to include in the regression analysis only those process parameters that make engineering sense. But the form that those parameters take is not always immediately obvious. Figure 12.104 shows the true relationship between product composition and tray temperature at three operating pressures. The inclusion of only P and T would imply that the relationship is a series of parallel straight lines as shown (dashed). 

This pattern is counterintuitive in terms of public-health, but it is sensible in a narrow engineering sense. Waters that acted on lead also acted on iron and various lined pipes, and it acted on those pipes faster than it would have acted on lead. As a consequence, cities that used non-lead pipes in areas with soft and corrosive supplies often found that the pipes burst or otherwise failed within ten years. Replacing service pipes was... 

For more complicated problems, several pinch temperatures may occur, and energy may have to be added from more than one hot utility and rejected to more than one cold utility. In general, it makes good engineering sense to add heat from the coolest hot utility and reject heat to the hottest cold utility. For... 

Illustration 8.6 A Simple Model of Reverse Osmosis We set as our task here the replacement of the rigorous PDE model of reverse osmosis by a simple and approximate treatment, which makes use of certain empirical findings. Given the uncertainty of the parameters used in even the most rigorous models, this is no more than what good engineering sense dictates. 

The physical and chemical properties of the materials of these solids are so diverse that there is hardly any correlation to be expected between these properties and the levels of the friction-speed curves. Materials such as glass, stone and PMMA in clean state (in the engineering sense), give equally high values in this series, whereas PTFE gives the lowest value as expected. There is no correlation between the peak values and the surface roughness (CLA values). 

If CO is not vented off from valve B, then it will begin to dissolve in the condensate to form H CO (carbonic acid). This acid causes tube failures due to acidic corrosion. Venting gas below the pass partition baffle will stop this corrosion, according to the Shell expert. I don t have any personal experience in stopping CO corrosion with such venting. But it seems to make good engineering sense to me. 

In conclusion, please do not use both hydrocarbon purges and the flare stack water seal together. One or the other Using both does not enhance plant safety and makes no engineering sense. I tried to explain all this to the refining VP referred to above, but to no avail. 

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