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energy performance analysis of adnan menderes international airport

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In the absence <strong>of</strong> accounting for <strong>energy</strong> storage in the zone air, a heat balance equation would be<br />

similar to the following:<br />

Qconv + QconvIntGains + Qinfil + Qsys = 0<br />

Qconv is the amount <strong>of</strong> convection between the all <strong>of</strong> the surfaces in the zone and the zone air,<br />

QconvIntGain is the amount <strong>of</strong> heat convected from internal gains such as people, lights, and e<br />

quipment,<br />

Qinfil is the amount <strong>of</strong> heat gained or lost due to infiltration, and<br />

Qsys is the amount <strong>of</strong> heat added to or subtracted from the space due to a space conditioning<br />

system<br />

Strand indicates that<br />

Figure 3.6. Zone Air Heat Balance<br />

(Source : Strand, et al. 2001)<br />

For most cases, the quasi-steady equation shown above is adequate for solving the zone air heat<br />

balance.<br />

C(dT/dt) = Qconv + QconvIntGains + Qinfil + Qsys<br />

where C is the product <strong>of</strong> the mass <strong>of</strong> the zone air and the specific heat <strong>of</strong> air<br />

The control volumes at the inside and outside faces <strong>of</strong> each surface in particular<br />

zone and a control volume around the zone are the requirements <strong>of</strong> these equations to be<br />

set up (Strand, et al. 2001).<br />

24

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