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Infiltrated air

Example 21.4 Estimate the infiltration air heat gain for the coldroom in Example 21.3. [Pg.218]

It should be pointed out that the amount of moisture that enters or leaves a building by diffusion is usually negligible compared to the amount that enters with infiltrating air or leaves with exfiltrating air. The primary cause of interest in the moisture diffusion is its impact on the performance and longevity of building materials. [Pg.807]

INFILTRATION - Air flowing inward as through a wall, crack, etc. [Pg.89]

The required available heat for the soak zone will be the sum of (a) the remaining heat needed into the loads to heat them to good quality (b) heat losses to and from refractory, hearth materials, openings, and water-cooled devices and (c) heat absorbed by infiltrated air in warming to zone temperature. [Pg.166]

To prevent the resultant increase in fuel required per unit weight of load is to limit the volume of infiltrated air moving through the discharge opening... [Pg.168]

During mill delays, efficiency remains very high, supplying heat losses and some heat to the product. Conventional burner systems lose efficiency as gas exit temperatures rise and infiltrated air increases. [Pg.182]

Slot losses in walking hearth and rotary furnaces due to infiltrated air and refractory condition... [Pg.298]

Fig. 7.2. Draft developed in a hot chamber, and fuel input required to heat infiltrated air. The vertical scale is the difference in height between a cold air inlet (crack, door opening) and a hot gas outlet at the top (flue, stack top, top of door opening). (Courtesy of reference 52.)... Fig. 7.2. Draft developed in a hot chamber, and fuel input required to heat infiltrated air. The vertical scale is the difference in height between a cold air inlet (crack, door opening) and a hot gas outlet at the top (flue, stack top, top of door opening). (Courtesy of reference 52.)...
Protect the loads from unwanted cooling by infiltrated air. [Pg.314]

The makeup-air unit supplying Zone 2 receives its air from the building distribution system, the Zone 3 ventilation system (fan 3), boosted by fan 13 and recirculated by fan 11. The volume of makeup air is determined by the amount of air exhausted from the east and west Zone 2 sections, the amount of makeup air supplied to Zone 2A (which includes the Zone 1 supply air), less the amount of infiltration air into Zone 2. In addition to maintaining the correct pressure differential, the Zone 2 system provides at least four air changes per hour in Zone 2 and provides necessary environmental conditioning. The volume of recirculated air is regulated by a manual intake damper located in the intake duct of the Zone 2 filter and cooling coil. [Pg.117]

From this, the heat required by the dryer, Q is found. (The energy requirement to release the moisture bound in hygroscopic products is disregarded in Q as are the heats of crystallization of solids out of the solution and the heat taken up by infiltrated air entering the dryer). [Pg.342]

It was mentioned earlier that the sources of fluid flow in rotary kilns are the primary air, secondary air, combustion products, and infiltration air. Usually the combustion system is such that the primary air issues from a burner nozzle as a jet into an open tube or into a tube surrounded with secondary air prior to combustion. The primary air nozzle tip velocities can be anywhere between 20m/s and 100 m/s depending on the firing rate. The secondary air into which the primary air is discharged is at a relatively lower velocity, typically in the range of 5-15 m/s (Table 3.1). [Pg.43]

In heating season, temperature of supply air is below 49 °C (heat pump). The duct is enclosed in unheated space e.g. vented or unvented crawl space or basement. The duct insulation is selected as R-2 (Table B.3). Based on the floor area of 90m, the recommendation of the software for infiltration is selected. Infiltration air changes per hour are 0.5 for summer and 1.08 for winter (Table B.2). [Pg.73]

Based on the floor area of 969 square feet the recommendations for infiltration Air Changes per Hour (ACH) are Summer , 5l... [Pg.161]

Careful maintenance of the kiln seals is important. Infiltration of air is I iable to cause major heat losses. The amount of infiltrated air can be approximately estimated with the aid of the following formula ... [Pg.169]

Allowing 20% (= 57925 m /hour) to take account of infiltrated air, the total gas flow (at 120°C) to be treated by the dust collection equipment will be about 347550 m /hour... [Pg.632]

If the building has more exhaust than make-up air and pressure is negative, determine the quantity of infiltration air as a percentage of the shortfall and calculate its heat load as well. Adjust for boiler/bumer efficiency. [Pg.454]


See other pages where Infiltrated air is mentioned: [Pg.430]    [Pg.430]    [Pg.6]    [Pg.60]    [Pg.195]    [Pg.74]    [Pg.78]    [Pg.222]    [Pg.229]    [Pg.239]    [Pg.255]    [Pg.273]    [Pg.298]    [Pg.298]    [Pg.34]    [Pg.56]    [Pg.585]   
See also in sourсe #XX -- [ Pg.341 ]




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