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[EnergyPlus_Support] Natural Ventilation: Surface convective heat transfer coefficient
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- Subject: [EnergyPlus_Support] Natural Ventilation: Surface convective heat transfer coefficient
- From: "tobiasschulzeoooitu" <tobias.schulze@xxxxxxxxxxxxxx>
- Date: Thu, 29 Dec 2011 09:51:04 -0000
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- Delivery-date: Thu, 29 Dec 2011 02:51:08 -0700
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Dear all,
I am looking for advice, if there is a correct bild-in convection algorithm (inside surface) to utilize for naturally ventilated rooms including thermal mass (e.g. concrete ceiling) im summer for durinal cooling of a small office room. I think non of the algorithms take into account the increased air change rates for this strategy(lets say 5-15 ACH) and are modelled as "naturally buoyant covection rooms" with no external airflow. If I use the Adaptive Convection Algorithm the floor at night is arround hc=1,7 W/m2,K (Model=AlamdariHammondUnstableHorizontal) and the ceiling is hc=0,5 W/m2,K,(Model=AlamdariHammondStableHorizontal) which seems to be too low.
If there is no such algorithm, may be you can advice reference or formula on how to calculate them (for EMS application)?
Thank You
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