Air equivalent

The vendor will convert the component flow data into an air equivalent." Since jets are rated on air handling ability, he can then build up a system from his standard hardware. The vendor should provide air equivalent capability data with the equipment he supplies. Determination of air equivalent can be done with Equation 1. 

ER = Entrainment ratio (or air equivalent). It is the ratio of the weight of gas handled to the weight of air which would be handled by the same ejector operating under the same conditions. 

Tray, Truck, and Tunnel Driers In order to accelerate drying, the closet is factory-built with tight walls. It forms a box, and the air is passed by means of a fan over a radiator or over finned tubes and then over the trays. A portion of the air escapes at the discharge opening the remainder is reheated and recirculated. An amount of new air equivalent to the volume discharged is admitted at the fan. Secondary heating tubes are placed in the path of the air to restore their temperature and heat content. In the tray drier, shallow pans 2 ft by 3 ft by 2 in. deep, for example, are placed on a rack, forming part of the drier. In the truck drier, the rack is on wheels, and the whole may be wheeled in and out of the drier. There may be one or several trucks to each drier, and each truck may have twelve, sixteen or more levels for trays. 

Some manufacturers furnish 70°F air equivalent curves to allow the purchaser to convert performance to actual plant conditions. It is almost impossible to operate on one design point. 

Note if the data for this example had been given as air equivalent, then the water vapor portion would have been corrected for molecular weight, using Figure 6-18. 

The air equivalent is determined from Eigure 6-18 using the average molecular weight. 

The 70°F air equivalent correcting for temperature is found as previously described, using the air curve of Figure 6-17. 

This is also a frequent process situation. To determine the 70°F air equivalent, the non-condensable are determined as in Example 6-5 and the water vapor as in Example 6-2. The total for the mixture is the sum of these two values. 

Installation arrangements, 351 Pump-down time, 380 Selection procedure, 374 Specification form, 377 Specifications, 373 Steam jet comparison, 356 Types of loads, 359 Ejectors, 346 Applications, 353 Barometric condenser, 249, 376 Booster, 370 Calculations Actual air capacity, 362 Air equivalent, 360... 

Figure 1 shows a microphotograph of tracks produced by radon and its progeny. It is evident from Figure 1 that the tracks can be classified into round (R) and wedge-shaped (W) tracks. The characteristic for the formation of the two types of tracks was studied by experiment and the results are shown in Figure 2. This figure shows the cross section of the solid in which the a-rays produced the two types of tracks. In this figure, the distance corresponds to the residual range of a-ray at the incidence point P in the unit of cm of air equivalent thickness (r). If an a-ray which enters the detector through the point P stops in region R, it produces a round...

The conical coal injector was replaced with a blunt cyclin-der with a single axial jet so the flame could be stabilized at lower swirl numbers, thereby reducing the centrifugal deposition on the furnace walls. The radiation shield between the combustor and heat exchanger was removed to reduce particle losses further. The increased radiative transfer decreased the wall temperature substantially. The later experiments were also carried out at lower fuel-air equivalence ratios, i.e., (J> = 0.57. The combination of increased heat losses and increased dilution with excess air reduced the maximum wall temperature to 990°C for the experiments reported below. 

Noble Metal Catalysts. Rh-based catalysts have been investigated on different supports, resulting in different H2 and CO yields. Gasoline and naphtha POX over a supported Rh catalyst were reported by Fujitani et al. For y-alumina supported Rh catalyst, maximum yields of 96% of both H2 and CO were reported with 0.2 wt% Rh loading at 700°C, an air equivalence ratio of 0.41, and a liquid hourly space velocity (LHSV) of 2 h A 0.05 wt% Rh supported on zirconia yielded 98% H2 and 85% CO at 725°C, an... 

Equivalent Weight and Volume an d Their Precision Indexes for Comparison of Explosives in Air. Data for mean peak pressures and positive impulses determine figures of merit which express performances of expls fired in air. Equivalent Weight (EW) Equivalent Volume (EV) are easily interpretable by ordnance designers. The EW of a new expl is the ratio of wt of a known expl to the wt of a new expl which gives. equiv power as measured by peak pressure or positive impulse. The EV is similarly defined... 

Use laminar premixed free-flame calculations with a detailed reaction mechanism for hydrocarbon oxidation (e.g., GRI-Mech (GRIM30. mec)) to estimate the lean flammability limit for this gas composition in air, assuming that the mixture is flammable if the predicted flame speed is equal to or above 5 cm/s. For comparison, the lean flammability limits for methane and ethane are fuel-air equivalence ratios of 0.46 and 0.50, respectively. 

Figure 9. Comparison of OH and temperatures in both primary reaction zone and recombination regions. The fuel-air equivalence ratio was = 0.93. The probed region was 1.5 mm from the curved wall. The uncertainty in the hydroxyl temperature is 100 K. CH,-air flame (9), Ng ( ), OH ( 3).

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