Hi, Jean
May be this answer is not required any more after the other replies already posted.
I would just like to add that I simply copy the DesignDay object from the .ddy file as follows:
===================
SizingPeriod:DesignDay,
Denver Centennial Golden N Ann Htg 99.6% Condns DB, !- Name
-18.8, !- Maximum Dry-Bulb Temperature {C}
0.0, !- Daily Temp Range {C}
-18.8, !- Humidity Indicating Conditions at Maximum Dry-Bulb
81198., !- Barometric Pressure {Pa}
3, !- Wind Speed {m/s} design conditions vs. traditional 6.71 m/s (15 mph)
340, !- Wind Direction {Degrees; N=0, S=180}
0.00, !- Clearness {0.0 to 1.1}
0, !- Rain {0-no,1-yes}
0, !- Snow on ground {0-no,1-yes}
21, !- Day of Month
12, !- Month
WinterDesignDay,!- Day Type
0, !- Daylight Savings Time Indicator
WetBulb; !- Humidity Indicating Type
====================
In your e-mail below, you have use the name Winter and Summer as unique object names. These are not the Day Type names
What I was trying to point out was that the SizingPeriod:DesignDay, object would use an object in this format. Linda has pointed out that there are 18 such object files in each .ddy file for each location. All the Winter data are assumed to be on 21 December, and all the Summer data are assumed to be on 21 July. Normally, you will only run one of each group, therefore there is not need to change the dates.
When you said using SizingPeriod:DesignDay,Summer, or SizingPeriod:DesignDay,Winter you would be designing your own daya for simulation.
===============
SimulationControl,
Yes, !- Do Zone Sizing Calculation
Yes, !- Do System Sizing Calculation
Yes, !- Do Plant Sizing Calculation
No, !- Run Simulation for Sizing Periods
Yes; !- Run Simulation for Weather File Run Periods
================
The above is simulation control.
When you said "BUT without a RunPeriod or RunPeriodControl object specified". I assumed that you have changed the last line to "No; !- Run Simulation for Weather File Run Periods".
This meant that the objects specified in RunPeriod would not run.
===================
RunPeriod,
, !- Name
1, !- Begin Month
14, !- Begin Day of Month
1, !- End Month
14, !- End Day of Month
Tuesday, !- Day of Week for Start Day
Yes, !- Use Weather File Holidays and Special Days
Yes, !- Use Weather File Daylight Saving Period
No, !- Apply Weekend Holiday Rule
Yes, !- Use Weather File Rain Indicators
Yes; !- Use Weather File Snow Indicators==============
There may be many such 'one day' objects specified in one IDF. Many users are using this in place of the designDay object, and ended up with many warnings. The normal object in this group is for an annual weather file simulation period. The short period ones were included to test the weekly schedules and to reduce the simulation time.
=================
You can run one or more SizingDay:DesignDay objects. Because the dates are not consecutive, the EPlus resultViewer will not display the result as two consecutive days. They need to be selected or moved on the horizontal axis to be displayed. If the dates are the same, the viewer may have problem in the display. (Same problem with Excel, if you use x-y plot with date as the x-ax
__._,_.___
May be this answer is not required any more after the other replies already posted.
I would just like to add that I simply copy the DesignDay object from the .ddy file as follows:
===================
SizingPeriod:DesignDay,
Denver Centennial Golden N Ann Htg 99.6% Condns DB, !- Name
-18.8, !- Maximum Dry-Bulb Temperature {C}
0.0, !- Daily Temp Range {C}
-18.8, !- Humidity Indicating Conditions at Maximum Dry-Bulb
81198., !- Barometric Pressure {Pa}
3, !- Wind Speed {m/s} design conditions vs. traditional 6.71 m/s (15 mph)
340, !- Wind Direction {Degrees; N=0, S=180}
0.00, !- Clearness {0.0 to 1.1}
0, !- Rain {0-no,1-yes}
0, !- Snow on ground {0-no,1-yes}
21, !- Day of Month
12, !- Month
WinterDesignDay,!- Day Type
0, !- Daylight Savings Time Indicator
WetBulb; !- Humidity Indicating Type
====================
In your e-mail below, you have use the name Winter and Summer as unique object names. These are not the Day Type names
What I was trying to point out was that the SizingPeriod:DesignDay, object would use an object in this format. Linda has pointed out that there are 18 such object files in each .ddy file for each location. All the Winter data are assumed to be on 21 December, and all the Summer data are assumed to be on 21 July. Normally, you will only run one of each group, therefore there is not need to change the dates.
When you said using SizingPeriod:DesignDay,Summer, or SizingPeriod:DesignDay,Winter you would be designing your own daya for simulation.
===============
SimulationControl,
Yes, !- Do Zone Sizing Calculation
Yes, !- Do System Sizing Calculation
Yes, !- Do Plant Sizing Calculation
No, !- Run Simulation for Sizing Periods
Yes; !- Run Simulation for Weather File Run Periods
================
The above is simulation control.
When you said "BUT without a RunPeriod or RunPeriodControl object specified". I assumed that you have changed the last line to "No; !- Run Simulation for Weather File Run Periods".
This meant that the objects specified in RunPeriod would not run.
===================
RunPeriod,
, !- Name
1, !- Begin Month
14, !- Begin Day of Month
1, !- End Month
14, !- End Day of Month
Tuesday, !- Day of Week for Start Day
Yes, !- Use Weather File Holidays and Special Days
Yes, !- Use Weather File Daylight Saving Period
No, !- Apply Weekend Holiday Rule
Yes, !- Use Weather File Rain Indicators
Yes; !- Use Weather File Snow Indicators==============
There may be many such 'one day' objects specified in one IDF. Many users are using this in place of the designDay object, and ended up with many warnings. The normal object in this group is for an annual weather file simulation period. The short period ones were included to test the weekly schedules and to reduce the simulation time.
=================
You can run one or more SizingDay:DesignDay objects. Because the dates are not consecutive, the EPlus resultViewer will not display the result as two consecutive days. They need to be selected or moved on the horizontal axis to be displayed. If the dates are the same, the viewer may have problem in the display. (Same problem with Excel, if you use x-y plot with date as the x-ax
Hello Group,
I'm not sure how to run both a Summer and a Winter DesignDay simulation.
If the idf specifies x2 SizingPeriods, i.e.
SizingPeriod:DesignDay, Winter, !- Design Day Name
AND
SizingPeriod:DesignDay, Summer, !- Design Day Name
BUT without a RunPeriod or RunPeriodControl object specified
What is actually getting simulated.
When I comment out the one SizingPeriod:DesignDay, the other gets simulated. It's
a) used in sizing
b) for warming up
c) simulated run
Q1) How do I best simulate both days seperately? Can I run x2 run periods (one for each design day) and will they be seperately warmed up?
I'm not sure how to run both a Summer and a Winter DesignDay simulation.
If the idf specifies x2 SizingPeriods, i.e.
SizingPeriod:DesignDay, Winter, !- Design Day Name
AND
SizingPeriod:DesignDay, Summer, !- Design Day Name
BUT without a RunPeriod or RunPeriodControl object specified
What is actually getting simulated.
When I comment out the one SizingPeriod:DesignDay, the other gets simulated. It's
a) used in sizing
b) for warming up
c) simulated run
Q1) How do I best simulate both days seperately? Can I run x2 run periods (one for each design day) and will they be seperately warmed up?
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___