lec4 - Air flow Ventilation supply of fresh air removal of...

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Air flow Ventilation ± supply of fresh air ± removal of internal heat ± heat dissipation from skin Image by MIT OCW.
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Air flow Ventilation ± supply of fresh air ± removal of internal heat ± heat dissipation from skin
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Air flow Ventilation ± Images courtesy of the U.S. Department of Energy.
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Air flow Active air flow ± Supply of fresh air based on renewal and change rates Ventilation flow rate vr (m 3 /s) = V x N (nb of air changes per hour) / 3600 Ventilation conductance qv (W/K) = 1200 (J/m 3 K) x vr = 0.33 x N x V Ventilation heat flow: Qv = qv x Δ T
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Active air flow ± Supply of fresh air based on renewal and change rates Same 60 m 3 room as studied for heat flow. Heat losses through façade due to conduction = 190 W Losses due to air renewal (N = 0.7 h -1 ) ? What should N be for ventilation and conduction losses to be equal ? J
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This note was uploaded on 12/11/2009 for the course ARCHITECTU 4.401 taught by Professor Marilyneandersen during the Spring '06 term at MIT.

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lec4 - Air flow Ventilation supply of fresh air removal of...

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