Equalizing air

Eigure 3 shows the winter and summer comfort zones plotted on the coordinates of the ASHRAE psychrometric chart. These zones should provide acceptable conditions for room occupants wearing typical indoor clothing who are at or near sedentary activity. Eigure 3 appHes generally to altitudes from sea level to 2150 m and to the common case for indoor thermal environments where the temperature of the surfaces (/) approximately equals air temperature (/ and the air velocity is less than 0.25 m/s. A wide range of environmental appHcations is covered by ASHRAE Comfort Standard 55 (5). Offices, homes, schools, shops, theaters, and many other appHcations are covered by this specification. 

A nearly perfect diverging wavefront would exit the test plate appearing as though it came from a source 100 m away. A segment would be positioned so that its mean center of curvature was coincident with that virtual source 100 m away. In the worst case in our example, the un-equal air path would be about 4 m rather than 204 m. Interference would take place between the wavefront reflected off the 100 m radius side of the test plate and the segment. The roughly 3 m back to the source and beamsplitter is common path and will not affect the interference pattern. 

The air must be introduced evenly at the bottom of the product container through an inlet air plenum. Proper air flow in the inlet air plenum is critical to ensure that equal air flow velocities occur at every point on the air distributor plate. If the air is not properly distributed before it reaches the bottom of the container, uneven fluidization can occur. 

The equalization of the peripheral air velocity at the burner inlet will result in equal mass flow of air around and through the periphery of the swirler. The result of this equal air mass flow distribution through the swirler will be a fully developed and balanced air vortex at the center of the outlet of the swirler [4]. Flame stability and turndown of the burner depend on the condition of this vortex. Unequal air distribution results in an asymmetrical vortex leading to a flame that is more sensitive to pressure variations, limited in turndown ratio, sensitive to FGR on flame instability at lower loads, difficult in light-off by the igniter, and sensitive to flame scanning operation. 

The air-fuel ratio has a significant influence on PAH emissions. With leaner mixtures the mass of PAH in the exhaust gas drops noticably. The PAH profile changes to the extent that the share of carcenogenic components of total PAH are lower, whereas especially the share of Pyren increases. The absolute levels of the PAH emissions have no effect on the PAH profile for equal air-fuel ratios. 

When comparing air bars, there should be a logical basis. Equal power consumption is one such basis for comparison. Under equal air horsepower, single-, double-, and triple-slot air bars have very distinctive heat transfer profiles. As seen in Figure 46.11, this TRI-FLOAT has the highest average heat transfer coefficient. The air-bar type uses multiple small orifices to accomplish the same task as the double-slot air bar. Total open area is the same on both. 

The water pre-exists in both gases, and is deposited as a result of a redistribution of phlogiston. Cavendish s explanation is quite consistent with the view that water is an element. PauH said the water was the result of a mutual and compensating alteration of the two kinds of air, both of which he supposed to be, at the same time, equally air and also equally water . The... 

A special characteristic of the Mazzoni MTFFR is the so called "equalizing air". Equalizing air enters the lower chamber at the top of the reactor. This dry process air serves two notions ... 

Any dry air taken from the process to be used as equalizing air has to be compensated by the total amount of dry air i.e. the SO3 level in the remaining air will increase proportional to the amount of SOa-free equalizing air. The benefits of equalizing air have never been fiilly demonstrated in practice by model experiments. 

When comparing air bars, there should be a logical basis. Equal power consumption is one such basis for comparison. Under equal air horsepower, single-, double-, and triple-slot air bars have very distinctive... 

Bloch-Salisbury E, Shea SA, Brown R, et al. Air hunger induced by acute increase in PCO2 adrqrts to chronic elevation of PCO2 in ventilated humans. J Appl Physiol 1996 81(2) 949-956. Bloch-Salisbury E, Spengler CM, Brown R, et al. Self-control and external control of mechanical ventilation give equal air hunger relief. Am J Respir Crit Care Med 1998 157(2) 415-420. 

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