fhartley at dynamix-ltd.com
Wed Jan 13 05:00:21 PST 2010
Table G3.1 5c (for Proposed) and 5d (for Baseline) mentions how to model the reflectance (1-absorptance) of both the baseline and proposed roof. The baseline must be modeled with a reflectivity of 0.3. The proposed must be either 0.3, or 0.45 if the proposed roof has a reflectance of 0.7 or greater.
I have not seen anything in 90.1 about modeling the reflectance of walls.
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of sambhav tiwari
Sent: Wednesday, January 13, 2010 12:31 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Queary
I had a query whether ASHRAE 90.1 mentions what value has to
be taken for wall and roof absorptance as it mentions for U value . As
absorptance value has great impact on heat gains and further on energy
Can we have a better wall absorptance in proposed case from base case
so to improve energy performance
Any response will be highly appreciable.
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