Type number

Producer Type Number of Availabihty Notes  [c.122]

Then n in equation (6.62) is the type number of the system and J([ denotes the product of the factors. The system type can be observed from the starting point uj 0) of the Nyquist diagram, and the system order from the finishing point bj oo), see Figure 6.22.  [c.168]

Type number Chemical composition, %  [c.69]

Type number C Mn (max.) Si (max.) Cr Ni Trace Elements  [c.70]

The problem of designing a RON entails the identification of membrane types, sizes, number and arrangement. In addition, the designer has to determine the optimal operating conditions and the type, number and size of any pumps and energy-recovery devices. In order to understand the basic principles of synthesizing an optimal RON, let us consider the class of problems for which one stage of parallel RO modules is used, A booster pump is first used to raise the pressure to its optimal level. The feed is distributed among a number, n, of parallel modules. The reject is collected as a retentate stream which is fed to an energy recovery turbines (if the value of recovered energy is higher than the cost of recovering it). The permeate streams are also gathered and constitute the environmentally-acceptable stream. The following design and operating variables are to be optimized]  [c.274]

Step 4 Defining the Operators - Each components operation is analyzed and assigned a GO operator that most closely represents the operation of the physical component. It is identified by the Type number which is the first of two numbers within each GO symbol.  [c.122]

Reaction type Number of electrons Thermally allowed Photochemically allowed  [c.363]

On analysis of the EXAFS data, the local environment around a given absorbing atom - that is, the type, number and distance of the back-scattering atoms - can be obtained. It should be noted that it is not necessary for the surrounding atoms to be formally bonded to the absorbing atom. Typically the distance has an uncertainty of 1 % within a radius of approximately 6 A however, the error in the coordination number is strongly dependent on the system studied and can be high. In this regard, comparison with standard materials and the use of EXAFS in conjunction with other techniques to ensure a realistic interpretation of the data is vital.  [c.140]

This type comes in four sizes. Types 1 through 4, and is constructed of corrugated metal sheets (See Figure 9-6GG). The types vary by corrugation size the larger the type number, the greater is the depth of corrugation. The deeper corrugations give higher capacity and lower pressure drop. According to Koch reference [101], at the same efficiency, in countercurrent gas-liquid operation, this packing has a higher capacity tmd lower pressure drop than any available dumped or structured packing. The terminology for Figure 9-54 is  [c.328]

A = (IF surface/ft tube) (number of tubes total) (net tube length)  [c.124]

Calculate required surface and tube number.  [c.184]

Tube Number of passes Number of passes Side  [c.394]

Various analytical tests determine zeolite properties. These tests supply information about the strength, type, number, and distribution of acid sites. Additional tests can also provide information about surface area and pore size distribution. The three most common parameters governing zeolite behavior are as follows  [c.88]

Case Flash Number Type Components Mole Fraction Pressure (bar) Temperature (K) Pressure (bar) Temperature V (K) F Mole Fractions Liquid Vapor No. of Iterations  [c.123]

Process constraints often reduce the number of options that can be considered. Examples of constraints of this type are as follows  [c.132]

When a hot utility needs to be at a high temperature and/or provide high heat fluxes, radiant heat transfer is used from combustion of fuel in a furnace. Furnace designs vary according to the function of the furnace, heating duty, type of fuel, and method of introducing combustion air. Sometimes the function is to purely provide heat sometimes the furnace is also a reactor and provides heat of reaction. However, process furnaces have a number of features in common. In the chamber where combustion takes place, the heat is transferred mainly by radiation to tubes around the walls of the chamber, through which passes the fluid to be heated. After the flue gas leaves the combustion chamber, most furnace designs extract further heat from the flue gas in a convection section before the flue gas is vented to the atmosphere.  [c.188]

Situations are often encountered where the Fp is too low or the Fp slope too large. If this happens, either different types of shells or multiple shell arrangements (Fig. 7.10) must be considered. We shall concentrate on multiple shell arrangements of the 1-2 type. By using 1-2 shells in series (Fig. 7.10), the temperature cross in each individual shell is reduced below that for a single 1-2 shell for the same duty. The profiles shown in Fig. 7.10 could in principle be achieved either by two 1-2 shells in series or by a single 2-4 shell. Traditionally, the designer would approach a design for an individual unit by trial and error. Starting by assuming one shell, the Fp can be evaluated. If the Fp is not acceptable, then the number of shells in series is progressively increased until a satisfactory value of Fp is obtained for each shell.  [c.225]

Expression for the Minimum Number of 1-2 Shell-and-Tube Heat Exchangers for a  [c.433]

Enzymes are classified in terms of the reactions which they catalyse and were formerly named by adding the suffix ase to the substrate or to the process of the reaction. In order to clarify the confusing nomenclature a system has been developed by the International Union of Biochemistry and the International Union of Pure and Applied Chemistry (see Enzyme Nomenclature , Elsevier, 1973). The enzymes are classified into divisions based on the type of reaction catalysed and the particular substrate. The suffix ase is retained and recommended trivial names and systematic names for classification are usually given when quoting a particular enzyme. Any one particular enzyme has a specific code number based upon the new classification.  [c.159]

An important application of this type of analysis is in the determination of the calculated cetane index. The procedure is as follows the cetane number is measured using the standard CFR engine method for a large number of gas oil samples covering a wide range of chemical compositions. It was shown that this measured number is a linear combination of chemical family concentrations as determined by the D 2425 method. An example of the correlation obtained is given in Figure 3.3.  [c.52]

One has seen that the number of individual components in a hydrocarbon cut increases rapidly with its boiling point. It is thereby out of the question to resolve such a cut to its individual components instead of the analysis by family given by mass spectrometry, one may prefer a distribution by type of carbon. This can be done by infrared absorption spectrometry which also has other applications in the petroleum industry. Another distribution is possible which describes a cut in tei ns of a set of structural patterns using nuclear magnetic resonance of hydrogen (or carbon) this can thus describe the average molecule in the fraction under study.  [c.56]

Investigations have been undertaken to evaluate cheap alternative materials as potential adsorbents for dyes using activated carbon as a reference. These include peat (2,28), com stalks (29), chitin (30), carbonized wool (31), sawdust (32), ceUulosic graft copolymers (33), fly ash (pulverized fuel ash) (34,35), bagasse pith (36), bentonite (37—39), calcium metasiUcate (WoUastonite) (40), organosiUcon (41), clays (qv) and Fuller s earth (2,42), activated alumina (43), pig and human hair, meat, bone meal, wheat and rice bran, and turkey feathers (44). Activated sludge which is discussed under biological treatment, has been found to show behavior similar to that of activated carbon in the adsorption of acid, direct reactive, disperse, and basic dyes (45). The adsorption capacity of activated sludge for these classes of dyes can be deterrnined by the Freundhch equation and adsorption isotherms (46—49). The adsorbabihty of dyes by activated sludge is mainly dependent on dye properties, molecular stmcture and type, number, and position of the substituents in the dye molecule (46). Adsorption is increased by the presence of hydroxy, nitro, and azo groups. On the other hand, adsorption is decreased by sulfonic acid groups.  [c.381]

If exchangers are countercurrent devices, then the number of units equals the number of shells, providing indithdual shells do not exceed some practical upper size limit. If, however, equipment is used that is not completely countercurrent, as with the 1-2 shell and tube heat exchanger, then  [c.227]

Targets also can be set for total heat exchange area, number of units, and number of shells for 1-2 shell-and-tube heat exchangers. These can be combined to establish a targej for capital costs, taking into account mixed materials of construction, pressure rating, and equipment type. Furthermore, the targets for energy and capital cost can be optimized to produce an optimal setting for the capital/energy tradeoff" before any network design is carried out.  [c.401]

See pages that mention the term Type number : [c.757]    [c.757]    [c.757]    [c.758]    [c.123]    [c.2077]    [c.2077]    [c.2077]    [c.757]    [c.757]    [c.758]    [c.1149]    [c.234]    [c.224]    [c.326]    [c.227]    [c.304]    [c.478]    [c.478]    [c.478]    [c.175]    [c.337]    [c.353]    [c.384]    [c.415]   
Advanced control engineering (2001) -- [ c.168 ]