| Author |
Message |
Topic: Window SHGC problem |
johntaylor
Replies: 5
Views: 914
|
Forum: EnergyPlus Simulation Posted: Fri May 23, 2008 4:57 am Subject: Window SHGC problem |
Linda,
Let me make sure I understand what is going on.
Are you saying when you build a window in Window 5, that the glazing data for each spectrum (Solar Transmission, Visible Trans, thermal IR ... |
Topic: Window SHGC problem |
johntaylor
Replies: 5
Views: 914
|
Forum: EnergyPlus Simulation Posted: Thu May 22, 2008 7:40 pm Subject: Window SHGC problem |
This still does not seem to be fixed.
I made another 3 pane window
Pane #1: Clear
Pane #2: PPG SolarBan 60 (Low-e Surface #3)
Pane #3: PPG SolarBan 60 (Low-e Surface #5)
WIndow 5 gives me a S ... |
Topic: Problems making windows from glazing database-flipping lowE |
johntaylor
Replies: 1
Views: 361
|
Forum: EnergyPlus Simulation Posted: Fri Apr 18, 2008 10:15 am Subject: Problems making windows from glazing database-flipping lowE |
| Thanks for including the glazing database. But there is one big problem: when assembling a a glazing unit sometimes the panes need to be flipped to get the low-e on the right side. Design builder is m ... |
Topic: Different wall thickness upstairs and down |
johntaylor
Replies: 1
Views: 391
|
Forum: EnergyPlus Simulation Posted: Tue Apr 15, 2008 11:36 pm Subject: Different wall thickness upstairs and down |
| If a lower floor has a thick wall and the upper floor has and thin wall, design builder creates external floor along the edge perimeter. It's obvious why this happens (because DB creates the simulatio ... |
Topic: DB loading E+ data is Slooooow |
johntaylor
Replies: 3
Views: 552
|
Forum: EnergyPlus Simulation Posted: Tue Apr 15, 2008 10:40 pm Subject: DB loading E+ data is Slooooow |
Laurent,
The load time is about 2-3 times as long as the simulation time regardless of the time to simulate. So a 3 minute simulation is 7-9 minutes in load time. A 20 minute simulation takes about ... |
Topic: Need to be able to set graph range, not just days |
johntaylor
Replies: 2
Views: 393
|
Forum: EnergyPlus Simulation Posted: Tue Apr 15, 2008 10:30 pm Subject: Need to be able to set graph range, not just days |
Andy,
as long as we are discussing date ranges: could you increase the warmup time range beyond 100 days? Or allow more than 1 year of simulation? We find that high mass buildings take more than a ... |
Topic: Need to be able to set graph range, not just days |
johntaylor
Replies: 2
Views: 393
|
Forum: EnergyPlus Simulation Posted: Thu Mar 27, 2008 10:54 pm Subject: Need to be able to set graph range, not just days |
There are several issues with the graphs:
1. We need to be able to get cumulative bar graphs for arbitrary date ranges not just anuual. So instead of just a day input, there need to be date range d ... |
Topic: creating new airtightness crack templates |
johntaylor
Replies: 6
Views: 680
|
Forum: EnergyPlus Simulation Posted: Thu Mar 27, 2008 10:41 pm Subject: creating new airtightness crack templates |
| This is a huge need for us too. Without some way to set infiltration, simulation is dubious at best. Infiltration is as important and insulation (sometimes more). Yet you wouldn't consider only having ... |
Topic: DB loading E+ data is Slooooow |
johntaylor
Replies: 3
Views: 552
|
Forum: EnergyPlus Simulation Posted: Tue Mar 25, 2008 9:20 am Subject: DB loading E+ data is Slooooow |
Have you put effort into the code efficiency for loading the data back from E+? Right now it is unbearable. It often takes 3 times as long to load the data than to simulate it. This is crazy slow.
... |
Topic: Internal Shading seasonal Control |
johntaylor
Replies: 5
Views: 499
|
Forum: EnergyPlus Simulation Posted: Thu Mar 20, 2008 6:04 am Subject: Internal Shading seasonal Control |
Yes, that isn't possible in E+.
But what about using schedules to chose between two different shading objects (one with 70% transparency and another with 95% transparency) |
Topic: Need ventilation setpoint schedules & Clothing setback |
johntaylor
Replies: 3
Views: 442
|
Forum: EnergyPlus Simulation Posted: Thu Mar 20, 2008 1:32 am Subject: Need ventilation setpoint schedules & Clothing setback |
| I noticed the "include IDF file" field in the simulation settings. Can this be used to inject features not available in DB? Is it viable to use this were it has to interact with a DB defined component ... |
Topic: Lighting visible fraction |
johntaylor
Replies: 2
Views: 335
|
Forum: EnergyPlus Simulation Posted: Thu Mar 20, 2008 1:25 am Subject: Lighting visible fraction |
I have a notebook compendium of efficiency from multiple sources. But this wikipedia article has accurate data for luminous efficiency of a few light types:
http://en.wikipedia.org/wiki/Luminous_ef ... |
Topic: Internal Shading seasonal Control |
johntaylor
Replies: 5
Views: 499
|
Forum: EnergyPlus Simulation Posted: Thu Mar 20, 2008 1:15 am Subject: Internal Shading seasonal Control |
Sorry, I wasn't specific enough
I meant internal shades, blinds, etc. |
Topic: Need ventilation setpoint schedules & Clothing setback |
johntaylor
Replies: 3
Views: 442
|
Forum: EnergyPlus Simulation Posted: Thu Mar 20, 2008 12:13 am Subject: Need ventilation setpoint schedules & Clothing setback |
Trying to do a simulation looking at comfort. I'm having 2 problems.
1. I can figure out how to make a setpoint schedule for natural ventilation. In the summer I want to night vent down to 64 F, bu ... |
Topic: HVAC schedules not in HVAC template |
johntaylor
Replies: 1
Views: 347
|
Forum: EnergyPlus Simulation Posted: Thu Mar 20, 2008 12:05 am Subject: HVAC schedules not in HVAC template |
| The HVAC template doesn't include the ability to add default HVAC schedules, am I missing something? |
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