There are a couple of things to understand. First, WUFI will be much better at predicting wall conditions if you have good material properties and weather
data. Next, in many climates, the outdoor RH averages about 70% and most hygroscopic materials will equilibrate with that. I’m not sure how HAMT deals with rain as there was no rain rate in the weather files. Not knowing your assembly, a relatively thin
south wall may heat up and dry out on the inboard side. I would also look at interior temperature and RH as well as the wall surface temperature. If your model interior is very dry (low RH dry) for some reason, the inner surface will dry out more.
I am also uncertain how HAMT starts a simulation. Heavy masonry materials often take a couple of years simulation to stabilize with WUFI. You may need to
check the wall profile, a more challenging task with HAMT.
Ned Lyon, P.E. (MA, WV)
Staff Consultant
SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9350 direct
617.285.2162 mobile
781.907.9009 fax
www.sgh.com
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Wednesday, February 11, 2015 3:04 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] HAMT Surface Inside Face Relative Humidity
Hi everyone,
I have some questions about HAMT Surface Inside Face Relative Humidity. The model of one ancient structure is analysed via EnergyPlus.
While reviewing the outputs, surface outside RH is found as 75.38 for a specific of time whereas corresponding surface inside RH is 4.93. This result seems not logical.
Is it related to moisture content value - set as 0 - of building components?
Do you have any idea about the interpretations?
Thanks in advance.
Emre Kishalı
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Posted by: "Edward G. Lyon" <EGLyon@xxxxxxx>
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