Not that energy modeling needs to be practical, but your “roof” will likely leak. No manufacturer warrants a membrane roof that ponds 48 hours after it rains
and glazing is a much less reliable waterproofing system…
Ned Lyon, P.E. (MA)
Staff Consultant
SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9350 direct
781.907.9009 fax
www.sgh.com
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
On Behalf Of Jeremiah Crossett
Sent: Tuesday, August 14, 2012 2:02 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Shallow Roof pond over glazed roof
What about a "work around" possibly using the thickness of the pond water and the specific heat, conductivity and density of water with an adaptive convection coefficient? On the eQuest modeling
forum such "work arounds" are quite common. Also TRNSYS has a pond and a pool TYPE 230 (designed as a thermal source/sink for a heat pump) as well as a outdoor pool TYPE 344 (designed for either indoor or outdoor pool) If I where you I would use the "work
around" by creating a thermodynamically similar material in e+ rather then attempting to use a TRNSYS type...
Jeremiah D. Crossett | Senior Analyst | Phase Change Energy Solutions
120 E. Pritchard St. | Asheboro, NC 27203 | Mobile 503-688-8951
On Tue, Aug 14, 2012 at 10:32 AM, Griffith, Brent <brent.griffith@xxxxxxxx> wrote:
Sorry, there is no model for this in EnergyPlus.
From:
EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
On Behalf Of shanznus
Sent: Tuesday, August 14, 2012 10:47 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Shallow Roof pond over glazed roof
Hi
May I know if it is possible to simulate the shallow roof pond which sits above the glazed roof? The objective is to find out the total cooling energy consumption of this room with a 'glazed water roof'.
Hope to hear from you soon.
Thank you!
Shan
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