Best solution

Since process design starts with the reactor, the first decisions are those which lead to the choice of reactor. These decisions are among the most important in the whole design. Good reactor performance is of paramount importance in determining the economic viability of the overall design and fundamentally important to the environmental impact of the process. In addition to the desired products, reactors produce unwanted byproducts. These unwanted byproducts create environmental problems. As we shall discuss later in Chap. 10, the best solution to environmental problems is not elaborate treatment methods but not to produce waste in the first place. 

The best solution to effluent problems is not to produce the waste in the first place, i.e., waste minimization. If waste can be minimized at the source, this brings the dual benefit of reducing waste treatment costs and reducing raw materials costs. 

Several manufacturers of transducers and equipment were contacted to give their best solution of the problems. Two instruments and five types of transducers were selected for further experiments. The equipments were very different concerning the possibility for controlling the measuring conditions and the transducer frequencies where from 10 MHz to 25 MHz with different crystal diameters and focussing lenses. 

Carbon is a commonly used and successful weak interfacial coating. For high temperature appHcations, however, carbon is not the best solution, because it oxidizes, leaving a physical gap between the reinforcement and the matrix or allowing interfacial reactions that result in a strong interface bond. Much research has been conducted to develop alternative high temperature debond coatings, with tittle success to date. 

Finding the best solution when a large number of variables are involved is a fundamental engineering activity. The optimal solution is with respect to some critical resource, most often the cost (or profit) measured in doUars. For some problems, the optimum may be defined as, eg, minimum solvent recovery. The calculated variable that is maximized or minimized is called the objective or the objective function. 

Due to the vibrant refrigerant issue it will be a cnaUenge for eveiy engineer to find the best solution for the particular application, but basic principles are the same. Good refrigerant shouldbe ... 

Use fixed (non-rotating) shaft and mount bearings in end plates. Probably the best solution, but no good for drive drums. 

In any design problem there is a multi-dimensional spaee of possible solutions. Some of these solutions may be aeeeptable, but not the best (loeal optima) and there may exist a single best solution (global optimum). 

This is a multivariable robust eontrol problem that ealeulates the optimal Hrx, eontroller. The MATLAB eommand hinf opt undertakes a number of iterations by varying a parameter 7 until a best solution, within a given toleranee, is aehieved. 

When a mixture of compounds is to be treated, more limitations may be placed upon the selection of a suitable abatement method. There may be several compounds in the waste gas, some being unsuitable to one method, while others are unsuitable to another method. In such cases, thermal incineration may be the best solution. When recovering mixtures, additional separation equipment may be needed for recycling the reclaimed compounds. 

Model and develop the best solution and carry out tests to prove it fulfills the objective. 

A combination of on-the-job and off-the-job methods is usually the best solution in most types of training. The following factors should be examined in order to analyze the role of training in preventing human error. Team training will be considered in the social and organizational factors which follow in other sections. 

The best solution to date for the electronic ground state is that of Wind (1965) who found an electronic energy (relative to infinitely separated nuclei and electrons) of —0.602634 2 h, which corresponds to a dissociation energy... 

Solution of the numerical HF equations to full accuracy is routine in the case of atoms. We say that such calculations are at the Hartree-Fock limit. These represent the best solution possible within the orbital model. For large molecules, solutions at the HF limit are not possible, which brings me to my next topic. 

According to some experts, the next best solution for energy independence is to make sure that all imported energy comes from friendly countries. The idea is to ensure a guaranteed source of energy in case a major energy exporter were to suddenly cut off its... 

New subsidies often outlive the public policy purpose that they were intended to address. The better-designed subsidies contain sunset provisions that require explicit action to reauthorize them after a certain time. Subsidy and externality policies arc often interrelated. It may be politically difficult to tax an energy source with high external costs, but much easier to subsidize a competing energy source with low external costs. Such second best solutions arc often implemented when political considerations block the preferred option. 

Trusses may be the best solution for very high-imposed loads. Frame action with columns is not possible with trusses. Although trusses are generally the lightest form of roof construction, they may be the most expensive due to high fabrication cost. A combination of lattices or lattice and truss may form a sawtooth roof profile for incorporation of north lights. 

In 1973, Richard Muther published a method of analyzing the interrelationships of activities within industrial plants, and the method allows a high degree of detail to be examined. The method proposed here is similar in that a relationship grid is constructed, but this technique employs the power of the modern desktop computer to rapidly examine alternative layouts to obtain best solutions. 

Technology exists to recover heat from processes operating at all temperatures, from regenerators on high-temperature plant to heat pumps using low-temperature effluent as a heat source. The problem in many cases is to find a use for the heat recovered. The best solution is to recycle the heat within the same plant, as the supply will always be matched to the demand. An alternative is to use the heat recovered in associated plant (for example, the heat recovered from a melting furnace can be used to dry feedstock for the furnace). 

The best solution to any effluent problem is to avoid treatment by the works altogether. Even if it appears initially to be more costly, it will save trouble and expense in the long term. 

---