Electrical efficiency

C. 3-Hydroxyquinoline. A 1-1. beaker is fitted with a thermometer and mechanical stirrer and clamped firmly on an efficient electric heater (Note 14). Diethyl succinate (400 ml.) (Note 15) is placed in the beaker and heated to boiling (215-220°) with stirring. 3-Hydroxycinchoninic acid (part B) (94.6 g., 0.5 mole) is added in portions to the boiling solution by means of a metal spoon or Scoopula. Care is taken to prevent too vigorous evolution of carbon dioxide. The addition requires 2-3 minutes, during which time a temperature drop is noted unless good heating is maintained. [Pg.56]

Manfrida, G. (1999), Opportunities for high-efficiency electricity generation inclusive of CO capture, Int, J, Appl, Thermodyn, 2(4), 165-175. [Pg.165]

Variable-speed fan drives permit conditioned air distribution to be matched more closely to a building s needs. High-efficiency electric motors are used to drive the fans, saving as much as half the energy once used. Both variable-speed and high- efficiency motors are being applied even in residential air conditioning systems. [Pg.29]

Efficient models of water heaters have thicker insulation, up to three inches thick, on some of the most efficient electric water heaters. Another means to increase efficiency is installing heat traps, or anti—convection devices, on the inlet and outlet pipes. Standard heat traps consist of short pipe nipple containing a small plastic ball. On the inlet side the ball is lighter than water and floats up to seal the inlet pipe. On the outlet side the ball is heavier than water and sinks against the seal. This prevents the heated... [Pg.1216]

Energy Efficiency Electrical Motors, Arthur D. Little, Inc., Federal Energy Administration, Washington, DC. DOE/CS-0163, May 1980. [Pg.688]

II. Ease of electrical connection Here the main problem is that of efficient electrical current collection, ideally with only two electrical leads entering the reactor and without an excessive number of interconnects, as in fuel cells. This is because the competitor of an electrochemically promoted chemical reactor is not a fuel cell but a classical chemical reactor. The main breakthrough here is the recent discovery of bipolar or wireless NEMCA,8 11 i.e. electrochemical promotion induced on catalyst films deposited on a solid electrolyte but not directly connected to an electronic conductor (wire). [Pg.515]

The efficient electric conductivity of such specially-inhomogeneous medium can be calculated in various limiting cases differing by tiie ratio between the local electric conductivity and its average value using methods developed in papers [70-72]. Namely, if the local electric conductivity o(r) slightly differs from the average one [Pg.127]

The electron-transfer rate between large redox protein and electrode surface is usually prohibitively slow, which is the major barricade of the electrochemical system. The way to achieve efficient electrical communication between redox protein and electrode has been among the most challenging objects in the field of bioelectrochemistry. In summary, two ways have been proposed. One is based on the so-called electrochemical mediators, both natural enzyme substrates and products, and artificial redox mediators, mostly dye molecules and conducted polymers. The other approach is based on the direct electron transfer of protein. With its inherited simplicity in either theoretical calculations or practical applications, the latter has received far greater interest despite its limited applications at the present stage. [Pg.555]

M Grell, M Oda, KS Whitehead, A Asimakis, D Neher, and DDC Bradley, A compact device for the efficient, electrically driven generation of highly circularly polarized light, Adv. Mater., 13 577-580, 2001. [Pg.480]

Figure 3.15 [63]. The table in Figure 3.15 also shows enhanced electron transfer rates for ferrocene attatched on aligned SWNTs as compared to ferrocene attatched on randomly dispersed SWNTs [124]. Moreover, such vertically aligned SWNTs act as molecular wires that allow efficient electrical communication between the underlying electrode and the redox enzymes [45, 123, 127[.

Enzyme biocatalyst assemblies on electrode surfaces usually do not achieve significant electron-transfer communication between the redox center and the conductive support, mostly because of the electrical insulation of the biocatalytic site by the surrounding protein matrixes. During the past four decades, several methods have been proposed and investigated in the field of bioelectrochemical technology in an effort to establish efficient electrical communication between biocatalysts and electrodes. " In general, electron transfer is classified by two different mechanisms (see Figure 2) ... [Pg.632]

Modem societies are quite specialized. Most of us are very produc-five af a few fasks and pay ofhers who have different skills to perform many ofher fasks rafher fhan do fhem ourselves. Specialization, however, does not imply that those with expertise must share it with others without compensation in the name of efficiency. Electric utilities, for example, generafe power more cheaply than most consumers, but that does not mean that electric companies ought to bear the costs of generating power. Similarly, in free markef economies, fhe quesfion of who should pay for knowledge is complefely separafe from fhe quesfion of who is fhe leasf-cosf provider of fhaf knowledge. [Pg.35]

Silver can be used to plate copper or brass to produce electrical connectors, since silver is stained much more slowly and has a higher conductivity than the other metals. The benefit of using silver is decreasing the surface electrical resistance, which results in a more efficient electrical connection. [Pg.167]

Bearing in mind that phenomena occurring in nature are too complex to be completely described by mathematical equations, the required details to be described by the model must be goal-driven, i.e. the complexity of the model, and the related results, must be strictly connected to the main goal of the analysis itself. When, for example, the main purpose of the model is to provide the fuel cell performance, in order to analyze the whole system in which it is embedded, the spatial variation in the physical and chemical variables (such as gas concentration, temperature, pressure and current density, for example) are not relevant however the performances, in terms of efficiency, electrical and thermal power and input requirements are important [1-4],... [Pg.51]

Alternately, the purge stream can be sent to a power plant where (at 25% efficiency) electricity is produced, resulting in a loss reduction of 0.25 x 0.946 = 0.2365 MJ/kg. Hybrid options are also possible, where part of the steam is sent to a power plant to generate the electricity necessary to power the cooling of the reactor. [Pg.177]

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