Power saving

Fig. 7. Control of fan performance with inlet vane control. SoHd lines marked A and N show normal performance without vanes (vanes wide open). As vanes are progressively closed, static and power curves are modified as indicated by dashed lines. Intersection ( - ) of the system resistance curve with these reduced pressure curves at points B, C, D, and E shows how imparting more spin to the inlet air reduces flow. Projecting points A to E vertically downward to the corresponding power curve locates fan power points A through E7 Power savings achieved over throttling control can be estimated by projecting points B through E vertically downward to the A power curve and comparing the value with that from the proper reduced power curve. To...

Chocolate (0.3—0.5% lecithin) lecithin is a wetting agent and emulsifier. It facihtates mixing, saves processiag time and power, saves cocoa butter, stabilizes viscosity, iacreases shelf life, counteracts moisture thickening, and aids release of molded goods (see Chocolate and cocoa). 

Magnet y ssemblj. Several types of magnet assembhes and pole combinations have been used successhiUy. Both electro and permanent magnet assembUes have also been employed. The permanent assembly is frequendy preferred because of the power savings effected. Typical pole specifications for the various apphcations are five or six poles for cobbers as weU as for roughers, and from four to ten (normally five) poles for finishers. 

Eig. 11. Power saving for variable speed drives. Power input for variable speed adjusts with flow to naturally match the frictional losses. FIC = flow... 

Figure 6.41 Power saving with the use of static control compared to throttle control...

The controllable pitch fan provides an infinitely variable air delivery across the K-Fin Sections through automatic changes in the fan blade angle. Temperature can be closely controlled to meet the varying demands of operating conditions and fluctuating atmospheric temperatures with appreciable power savings under low load conditions. For certain control applications, the ability of... 

Sometimes it is desirable to turn off a seetion of the produet but leave other portions operating. This is typieally the ease in laptop eomputers for power savings or eonsumer applianee applieations, sueh as CRT monitors, televisions, and stereo equipment. 

NOTES (1) PCs and monitors are to be shipped with the power saving features enabled and those features must be tested in a networked environment,... 

Power savings of 15% or more may result from the use of such vanes,depending on the design and final operating point on the compressor s performance curves. The inlet guide vanes increase the turndown and, thus, increase the operating range. 

Figure 12-135A. Power savings comparison between inlet vane control and outlet dampers. (Used by permission The Howden Fan Company.)...

It may be noted that energy will be required for compressing the air to the injection pressure which must exceed the upstream pressure in the pipeline. The conditions under which power-saving is achieved have been examined by DZIUB1NSKI(25j. who has shown that the relative efficiency of the liquid pump and the air compressor are critically important factors. 

Dziubinski, M. and Richardson, J. F. J. Pipelines 5 (1985) 107. Two-phase flow of gas and non-Newtonian liquids in horizontal pipes — superficial velocity for maximum power saving. 

Movie Operation Time (min) Average Power (W) Power Saving or Lifetime-Enhancing Factor... 

Fig. 3.22 (a) Current - voltage characteristics of a p-type photocathode and that when it is replaced by a platinum shown to illustrate the efficiency calculation using the power saving approach. The shaded area represents the maximum power saving as a result of photoelectrolysis, (b) The efficiency at various photocurrent densities obtained useing the base graph. 

One approach to find efficiency uses the electrical power saved due to the use of light in a photoelectrolysis process compared to an electrolysis process using light-insensitive electrodes [118]. 

Tbe power saving is maximum when both electrodes operate at a current density (Uax) and a voltage corresponding to the maximum power conversion point in the photoelectrolysis process. The maximum power saved as a result of photoelectrolysis is shown as the shaded area in Fig. 3.22(a). 

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